EP4000158A1 - Verfahren zum betreiben eines systems und system mit einem versorgungsmodul, einem wechselrichter, einem energiespeicher und einem netzteil - Google Patents
Verfahren zum betreiben eines systems und system mit einem versorgungsmodul, einem wechselrichter, einem energiespeicher und einem netzteilInfo
- Publication number
- EP4000158A1 EP4000158A1 EP20735266.7A EP20735266A EP4000158A1 EP 4000158 A1 EP4000158 A1 EP 4000158A1 EP 20735266 A EP20735266 A EP 20735266A EP 4000158 A1 EP4000158 A1 EP 4000158A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- converter
- connection
- rectifier
- side connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0096—Means for increasing hold-up time, i.e. the duration of time that a converter's output will remain within regulated limits following a loss of input power
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
Definitions
- the invention relates to a method for operating a system and a system with a supply module, an inverter, an energy store and a power supply unit.
- a power supply unit provides voltage for components of a system.
- the invention is therefore based on the object of making a system as safe as possible.
- the object is achieved in the method according to the features specified in claim 1, 2, 3 or 4 and in the system according to the features specified in claim 9 or 10.
- Supply module an inverter, an energy store and a power supply unit are that the supply module has a DC / DC converter, the first connection of which can be fed by a rectifier of the supply module, the AC voltage side connection of the rectifier from a
- the power supply unit has a DC / DC converter that provides a low voltage, in particular 24 volts, the supply module and the inverter, the DC / DC converter of the power supply unit can be supplied from a rectifier of the power supply unit, which is supplied by the AC voltage supply network can be fed, or from the first connection of the DC / DC converter of the supply module, the DC / DC converter being operated in such a way that In a first operating state, in particular and when the AC voltage supply network is ready for operation, the DC / DC converter provides a first voltage at its first connection by the DC / DC converter working in a first direction, in particular forward, and in a second operating state, in particular when a power failure is detected, i.e.
- the DC / DC converter provides a second voltage at its first connection by the DC / DC converter working opposite to the first direction, in particular backwards, the first voltage being greater than one Minimum voltage, in particular 400 volts, the second voltage being less than the one minimum voltage, the inverter being switched off when the voltage applied to its DC voltage-side connection is less than the minimum voltage.
- the supply module has a bidirectional DC / DC converter. In the first direction, power flows from the supply network via the
- the rectifier of the supply module and the DC / DC converter in the intermediate circuit in the second operating mode i.e. in the opposite direction, power flows from the energy storage device via the DC / DC converter and the second rectifier to the DC / DC converter of the power supply unit, which provides the low voltage .
- This enables the monitoring and signal electronics to operate as safely and as long as possible.
- Supply module is electrically connected in parallel to the DC voltage side connection of the inverter and to the energy store, the AC voltage side connection of the rectifier from one
- AC voltage supply network is fed, wherein the DC-side connection of the rectifier of the supply module is connected to the first connection of a DC / DC converter of the supply module, the second connection of the DC / DC converter being the DC-side connection of the supply module, with a first DC-side connection of the power supply unit, a low voltage, in particular 24 volts, is fed to the supply module and the inverter, with an AC voltage-side connection of the power supply unit from
- AC voltage supply network is fed, in particular wherein a
- AC voltage supply network is fed and the DC voltage-side connection of the rectifier feeds the first connection of the DC / DC converter of the power supply, with a second DC-side connection of the power supply parallel to
- DC voltage-side connection of the supply module is connected, in particular the voltage applied to the energy store is applied to the second DC voltage-side connection of the power supply unit and is fed to the first connection of the DC / DC converter via a third rectifier, a third DC voltage-side connection of the power supply from the
- Rectifier is fed, in particular the third connection of the power supply is connected in parallel to the first connection of the DC / DC converter of the supply module, the DC / DC converter being operated in such a way that in a first operating state, in particular and when it is ready for operation
- the DC / DC converter provides a first voltage at its first connection, in particular wherein the DC / DC converter works in a first direction, in particular forward, and in a second operating state, in particular when a power failure is detected, i.e. failure of the AC voltage supply network, the DC / DC converter provides a second voltage at its first connection, in particular wherein the DC / DC converter works opposite to the first direction, in particular backwards, the first voltage being greater than a minimum voltage, in particular 400 volts , the second voltage being less than the one minimum voltage, the inverter being switched off when the voltage applied to its terminal on the DC voltage side is less than the minimum voltage.
- the supply module has a bidirectional DC / DC converter. In the first direction, power flows from the supply network via the
- the rectifier of the supply module and the DC / DC converter in the intermediate circuit in the second operating mode i.e. in the opposite direction, power flows from the energy storage device via the DC / DC converter and the second rectifier to the DC / DC converter of the power supply unit, which provides the low voltage .
- This enables the monitoring and signal electronics to operate as safely and as long as possible.
- Important features of the invention in the method according to claim 3 for operating the system are that the system with a DC / DC converter from a
- the DC / DC converter being operated in such a way that the DC / DC converter at its first connection is in a first operating state, in particular and when the AC voltage supply network is operational, provides a first voltage
- Operating state in particular and when a power failure is detected, i.e. failure of the AC voltage supply network, provides a second voltage, the first voltage being greater than a minimum voltage, the second voltage being less than the minimum voltage, in particular being one from the first connection of the DC / DC -Converter supplied
- Inverter is switched off when the connection is present at this first connection
- Voltage is less than the minimum voltage.
- Signal electronics areas of the modules can be kept ready for operation. This increases security, since the monitoring and security functions carried out by the respective signal electronics areas are ready for operation for as long as possible.
- the DC voltage side connection of the supply module having a rectifier is electrically connected in parallel to the DC voltage side connection of the inverter and to the first connection of the DC / DC converter, to the second connection of which the energy store is connected, the AC voltage side connection of the rectifier being connected to a
- AC voltage supply network is fed, with a low voltage, in particular 24 volts, being fed to the supply module, the DC / DC converter and the inverter from a first DC voltage side connection of the power supply unit, with an AC voltage side connection of the power supply unit from
- AC voltage supply network is fed, with a second DC voltage side connection of the power supply parallel to
- DC voltage-side connection of the supply module is switched, wherein in a first operating state, in particular and when ready for operation
- the DC / DC converter provides a first voltage at its first connection, with the DC / DC converter providing a second voltage at its first connection in a second operating state, in particular and when a power failure is detected, i.e. failure of the AC voltage supply network the first voltage is greater than a minimum voltage, in particular 400 volts, the second voltage being less than the minimum voltage, the inverter being switched off when the voltage applied to its DC-side connection is less than the minimum voltage.
- a power failure i.e. failure of the AC voltage supply network the first voltage is greater than a minimum voltage, in particular 400 volts, the second voltage being less than the minimum voltage, the inverter being switched off when the voltage applied to its DC-side connection is less than the minimum voltage.
- Signal electronics areas of the modules can be kept ready for operation. This increases safety, since the monitoring and safety functions carried out by the respective signal electronics areas are ready for operation for as long as possible.
- sensors for power failure detection are in the
- the advantage here is that the information about the
- Data bus connection to the bus subscribers connected for data exchange can be reported, in particular also to the DC / DC converter, which then adjusts the operating state as a function of the information. It is therefore important that the measurement technology for detecting the power failure is located in a different device than in the DC / DC converter. This measurement technology is otherwise required for the function and mode of operation of the supply module, since it has a DC / DC converter arranged on the DC-side connection of the rectifier of the supply module, so that the power flow from the rectifier into the intermediate circuit can be controlled.
- one is used to discharge the energy store
- a temporally constant electrical power P is supplied permanently, in particular during a period of time T, in particular until the resistor is practically completely discharged, in particular with the period of time T being greater than the time constant of the by a supplied to the resistor, caused constant electrical continuous power
- the advantage here is that power is not only applied to the resistor for a short time in order to lower the intermediate circuit voltage, but that the greatest possible power P is applied permanently. This power is preferably so great that the
- the voltage U present at a series circuit formed from the resistor and a controllable semiconductor switch, in particular a brake chopper, is detected
- the series circuit being fed either directly from the voltage made available by the energy store or from the from via a DC / DC converter
- the controllable semiconductor switch being supplied with a pulse-width-modulated control signal with a pulse-width modulation ratio that is dependent on the value of the detected voltage, in particular wherein the pulse-width modulation ratio is determined according to (1 / U) * (P * R) L 1 is.
- Pulse width modulation ratio is changed, in particular is increased when the voltage drops.
- controllable half-liter switch is permanently closed when the voltage U falls below a threshold value, in particular the threshold value (P * R) being L 14. This enables particularly fast deep discharge when the maximum power that can be fed to the resistor is in the permissible range.
- Pulse width modulation is then avoided.
- the system has a mains-fed rectifier comprehensive supply module, the DC-side connection of which is connected to the DC-side connection of an inverter and to the first connection of a DC / DC converter, the second connection of the DC / DC converter with the Voltage U providing connection of the energy storage device is connected, wherein an electric motor, in particular a three-phase motor, is connected to the connection on the AC voltage side of the inverter.
- an electric motor in particular a three-phase motor
- a DC / DC converter is arranged between the DC voltage side connection of the rectifier and the DC voltage side connection of the supply module, which stops the power flow from the rectifier to the series circuit formed by the resistor R and the controllable half-liter switch during the discharge of the
- Rectifier and the controllable half-liter switch are arranged integrated, when discharging heat is generated either by the controllable semiconductor switch or alternatively by the diodes of the rectifier.
- the advantage here is that the power flow from the AC voltage supply network to the intermediate circuit can be interrupted. This is particularly important when unloading.
- the inverter has a power module on which controllable semiconductor switches arranged in half bridges are arranged.
- controllable semiconductor switches arranged in half bridges are arranged.
- the power P is less than the maximum from the electric motor via the inverter to the DC voltage-side connection of the
- Inverter with regenerative operation of the electric motor regenerative power.
- the advantage here is that by means of the energy storage a permanently constant output can be removed, but the excess energy in the generator mode must be stored in the energy store.
- the pulse width modulation frequency is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoe
- Time span T changed, in particular as pulse width modulation frequency different in particular discrete values can be used in chronological succession.
- the advantage here is that the
- Noise emission can be reduced or at least no monofrequency sound can be heard, but the sound energy can be divided into different frequencies. The sound impression is therefore more acceptable.
- the current I flowing through the resistor R is detected, the current resistance value of the braking resistor being determined from the time-averaged voltage provided via the brake chopper and the time-averaged current, in particular according to U / 1, and below Consideration of a characteristic curve which shows the temperature dependence of the
- Braking resistor represents the current temperature T of the respective braking resistor is determined.
- the advantage here is that the temperature can be determined from the specific voltage and the specific current.
- the braking resistor is monitored whether the specific temperature T of the braking resistor exceeds a threshold value, in particular wherein an emergency shutdown of the brake chopper is carried out when it is exceeded.
- a threshold value in particular wherein an emergency shutdown of the brake chopper is carried out when it is exceeded.
- the specific temperature is regulated to a setpoint temperature in that the power P is set accordingly as the control value of a controller, in particular a PI controller.
- a controller in particular a PI controller.
- the supply module having a DC / DC converter, the first connection of which can be fed by a rectifier of the supply module,
- the AC voltage supply network can be fed, the power supply unit having a DC / DC controller that provides a low voltage, in particular 24 volts, to the supply module and the inverter, the DC / DC controller of the power supply unit can be supplied from a rectifier of the power supply unit, which is supplied by the AC voltage supply network can be fed, and from the first connection of the DC / DC converter of the supply module, wherein the DC / DC converter is set up such that in a first operating state, in particular and when it is ready for operation
- the DC / DC converter provides a first voltage at its first connection, in particular by the DC / DC converter working in a first direction, in particular forward, and in a second operating state, in particular when a power failure is detected, i.e. failure of the AC voltage supply network, the DC / DC converter provides a second voltage at its first connection, in particular by the DC / DC converter working opposite to the first direction, in particular backwards, wherein the first voltage is greater than a minimum voltage, in particular 400 volts, the second voltage being less than the minimum voltage, in particular the inverter being set up in such a way that it is switched off when the voltage applied to its DC voltage-side connection is less than the Minimum voltage is.
- the supply module has a bidirectional DC / DC converter. In the first direction, power flows from the supply network via the
- the rectifier of the supply module and the DC / DC converter in the intermediate circuit in the second operating mode i.e. in the opposite direction, power flows from the energy storage device via the DC / DC converter and the second rectifier to the DC / DC converter of the power supply unit, which provides the low voltage .
- This enables the monitoring and signal electronics to operate as safely and as long as possible.
- Supply module is electrically connected in parallel to the DC voltage side connection of the inverter and to the energy store, the AC voltage side connection of the rectifier from one
- the DC voltage side connection of the rectifier of the supply module is connected to the first connection of a DC / DC converter of the supply module, the second connection of the DC / DC converter being the DC voltage side connection of the
- Supply module is, wherein a low voltage, in particular 24 volts, is provided to the supply module and the inverter by a first DC voltage side connection of the power supply unit, with an AC voltage side connection of the power supply unit from
- AC voltage supply network is fed, in particular wherein a
- AC voltage supply network is fed and the DC voltage-side connection of the rectifier feeds the first connection of the DC / DC converter of the power supply, with a second DC-side connection of the power supply parallel to
- DC voltage-side connection of the supply module is connected, in particular the voltage applied to the energy store is applied to the second DC-side connection of the power supply and is fed to the first connection of the DC / DC converter via a third rectifier, a third DC-side connection of the power supply from the
- the DC-side connection of the rectifier of the supply module is fed,
- the first connection of the DC / DC converter of the power supply is fed from the first connection of the DC / DC converter via a second rectifier of the power supply, in particular the third connection of the power supply parallel to the first connection of the DC / DC converter of the Supply module is switched, the DC / DC converter of the supply module is operated in such a way that in a first operating state, in particular and when it is ready for operation
- the DC / DC converter provides a first voltage at its first connection, in particular wherein the DC / DC converter works in a first direction, in particular forward, and in a second operating state, in particular when a power failure is detected, i.e. failure of the AC voltage supply network, the DC / DC converter provides a second voltage at its first connection, in particular wherein the DC / DC converter works opposite to the first direction, in particular backwards, the first voltage being greater than a minimum voltage, in particular 400 volts , the second voltage being less than the one minimum voltage, the inverter being switched off when the voltage applied to its terminal on the DC voltage side is less than the minimum voltage.
- the supply module has a bidirectional DC / DC converter. In the first direction, power flows from the supply network via the
- the rectifier of the supply module and the DC / DC converter in the intermediate circuit in the second operating mode i.e. in the opposite direction, power flows from the energy storage device via the DC / DC converter and the second rectifier to the DC / DC converter of the power supply unit, which provides the low voltage .
- This enables the monitoring and signal electronics to operate as safely and as long as possible.
- the DC voltage-side connection of the supply module having a rectifier is connected electrically in parallel with the
- AC voltage supply network is fed, with a low voltage, in particular 24 volts, being fed to the supply module, the DC / DC converter and the inverter from a first DC voltage side connection of the power supply unit, with an AC voltage side connection of the power supply unit from
- AC voltage supply network is fed, with a second DC voltage side connection of the power supply parallel to
- DC voltage-side connection of the supply module is switched, in particular so that the power pack can be supplied from the AC voltage supply network and / or via the DC / DC converter from the energy store, the DC / DC converter being designed so that the DC / DC Converter in a first operating state, in particular and when the AC voltage supply network is operational, provides a first voltage at its first connection, and the DC / DC converter in a second operating state, in particular and when a power failure is detected, i.e.
- a second voltage at its first connection Provides voltage, the first voltage being greater than a minimum voltage, in particular 400 volts, the second voltage being less than the minimum voltage, in particular, the inverter being designed in such a way that the inverter is switched off when the voltage applied to its terminal on the DC voltage side is less than the minimum voltage.
- sensors for power failure detection are in the
- the advantage here is that the information about the power failure can be recognized directly on the AC voltage supply network and is medium
- Data bus connection to the bus subscribers connected for data exchange can be reported, in particular also to the DC / DC converter, which then sets the operating state as a function of the information. It is therefore important that the measurement technology for detecting the power failure is located in a different device than in the DC / DC converter. This measurement technology is otherwise required for the function and mode of operation of the supply module, since it has a DC / DC converter arranged on the DC-side connection of the rectifier of the supply module, so that the power flow from the rectifier into the intermediate circuit can be controlled.
- the system has a supply module comprising a mains-fed rectifier, the DC-side connection of which is connected to the DC-side connection of an inverter of the system and to the first DC-side connection of a DC / DC converter of the system, the second DC-side connection being the DC / DC converter with the
- Energy storage in particular accumulator arrangement and / or
- Double-layer capacitor arrangement and / or ultracap arrangement is connected, wherein an electric motor, in particular three-phase motor, is connected to the AC voltage side connection of the inverter.
- the energy storage can be discharged. This unloading is can be carried out quickly because a very low ohmic resistance value can be used. This is because by detecting the voltage applied to the series circuit, a constant power can be dissipated to the resistor by means of an appropriately suitable pulse width modulation, and rapid discharge can also be carried out at low voltages.
- a DC / DC converter is arranged between the DC voltage side connection of the rectifier and the DC voltage side connection of the supply module.
- a controllable semiconductor switch connected in series with the braking resistor is arranged in the housing of the DC / DC converter.
- the advantage here is that the controllable semiconductor switch can be designed to be integrated with the other electronics of the DC / DC converter and can then also be heat-dissipated with this.
- a controllable semiconductor switch connected in series with the braking resistor is integrated on a power module which has diodes and / or controllable semiconductor switches arranged in half bridges.
- the advantage here is that the rectifier is integrated with the controllable semiconductor switch and is designed to be heatable together.
- the power flow from the rectifier to the intermediate circuit is stopped, in particular separated, by the converter when the energy store is discharged by means of the resistor, in particular the braking resistor, the power losses of the diodes of the rectifier and the power loss of the controllable semiconductor switch occur only alternatively.
- the power module is arranged in the housing of the inverter or of the supply module.
- FIG. 1 A first system according to the invention is shown schematically in FIG. 1
- FIG. 1 A second system according to the invention is shown schematically in FIG. 1
- FIG. 1 A third system according to the invention is shown schematically in FIG. 1
- a supply module 1 fed by an AC voltage supply network 8 provides a unipolar voltage at its DC voltage-side connection.
- the supply module has a first rectifier 3 fed by the AC voltage supply network 8, on whose DC voltage-side connection a DC / DC converter 4 is arranged with its first connection.
- the second connection of the DC / DC converter 4 is connected to the connection of the inverter 2 on the DC voltage side.
- the DC / DC converter 4 therefore sets the voltage made available at the connection of the rectifier 3 on the DC voltage side high to a first value, that is to say the desired value on the energy store.
- the second connection of the DC / DC converter 4 is arranged electrically parallel to the connection on the DC voltage side of the inverter 2.
- the energy store is also connected electrically in parallel to the connection of the inverter 2 on the DC voltage side.
- An electric motor in particular a three-phase motor, is connected to the connection on the AC voltage side of the inverter 2 and can thus be operated with speed control.
- a signal electronics area of the supply module 1 and a signal electronics area of the inverter 2 as well as a signal electronics area of a higher-level controller 10 are supplied with a low voltage, in particular 24 volts, from a power supply unit 9. This low voltage is made available by a second connection of a DC / DC converter of a power supply unit 9.
- the first connection of the DC / DC converter 13 is fed from the DC voltage-side connection of a rectifier 7 of the power supply 9, the rectifier 7 from the
- AC voltage supply network 8 is fed.
- a second rectifier 11 of the power supply unit 9, which can be fed from the DC voltage-side connection of the rectifier 3 of the supply module 1, is also connected to the first connection of the DC / DC converter 13.
- the second rectifier 11 does not have to be designed as a bridge rectifier, but can also be designed with a single diode.
- a third rectifier 12 of the power supply 9 which is from
- the low voltage made available by the DC / DC converter 13 can thus be produced from the voltages present at the three connections of the power supply unit 9.
- the third rectifier 12 does not have to be designed as a bridge rectifier, but can also be designed with a single diode.
- the DC / DC converter 13 can be operated over a wide range on the input side, that is to say at its first connection.
- the extra-low voltage can be made available by it when a voltage is applied to its first connection which is between a lower and an upper threshold value.
- the lower threshold is 150 volts and the upper threshold is 800 volts.
- the inverter 2 is switched off below a minimum voltage, in particular 400 volts, for example. So if the AC voltage supply network 8 fails, the energy store 6 is still at a voltage that is higher than the minimum voltage.
- the energy store 6 Since the energy store 6 has a large capacity, it is still possible to safely stop the electric motor with the amount of energy initially available.
- the low voltage is provided by the DC / DC converter 13 fed directly from the energy store via the third rectifier 12.
- the inverter 2 While the voltage at the energy store 6 is falling, the inverter 2 is switched off if the voltage falls below the minimum value.
- the DC / DC converter 4 is operated in reverse and the voltage applied to the energy store 6 is raised to the lower threshold value, so that the DC / DC converter 13 of the power supply unit 9 has the voltage boosted by the DC / DC converter 4 available via the rectifier 11 in order to continue to make the low voltage available.
- the extra-low voltage can thus also be provided when the voltage at the energy store reaches very small values, in particular also lower values than the amount of the extra-low voltage itself.
- the signal electronics areas can therefore be kept ready for operation for a long time.
- the nominal voltage that is to say the second voltage
- the inverter 2 is brought into the safe state and switched off. Thereafter, only the lower threshold value is provided by the DC / DC converter 5, so that the DC / DC converter 13 supplied via the rectifier 12 the
- the DC / DC converter 4 can only be operated in one direction, that is, it can be implemented as a DC / DC converter. This is because no feedback into the AC voltage supply network 8 is possible via the rectifier 3 of the supply module 1. The DC / DC converter 4 therefore only has to be operated to control the unidirectional power flow from the rectifier 3 to the energy store 6.
- the DC / DC converter 4 is also removable. Thus, from the AC voltage supply network 8 only via the rectifier 3 on
- the DC / DC converter 5 provides a first voltage depending on the energy management of the system.
- the inverter 2 is switched off after the electric motor has reached the safe state and then only a voltage corresponding to the lower threshold value is provided by the DC / DC converter 5 as long as the energy store 6 still has enough energy.
- the connection on the DC voltage side of the supply module 1 is a connection on the DC voltage side
- Inverter 2 connected, with a three-phase voltage to an electric motor from the inverter 2 on the AC voltage side connection of the inverter 2,
- AC motor in particular three-phase motor, is made available.
- the inverter is controlled by control electronics.
- the control electronics generate pulse-width-modulated control signals for the controllable semiconductor switches of the inverter, which are arranged in half-bridges connected in parallel to one another, this parallel connection of half-bridges being able to be fed from the unipolar voltage.
- these semiconductor switches are integrated on a module on which a further controllable semiconductor switch is also integrated, which can be referred to as a brake chopper.
- the brake chopper is connected in series with a resistor that can be referred to as a braking resistor, this series connection also being able to be fed from the unipolar voltage.
- Supply module 1 is also connected to the connection of the DC / DC converter 5, so that this DC / DC converter 5 is connected in parallel to the inverter 2.
- the energy store 6 is connected to the other connection of the DC / DC converter 5.
- the DC / DC converter 5 thus enables a power flow from the energy store 6 to the intermediate circuit having the unipolar voltage or vice versa, even if the amount of the unipolar voltage is very different from the amount of the voltage applied to the energy store 6.
- the energy store 6 is as an electrolytic capacitor arrangement
- Double-layer capacitor arrangement and / or preferably designed as a storage battery arrangement are identical to Double-layer capacitor arrangement and / or preferably designed as a storage battery arrangement.
- the supply module 1 can be implemented as a mains-fed rectifier 3. According to FIG. 2, however, a DC / DC converter 4 is arranged between the mains-fed rectifier and the DC voltage-side connection of the supply module 1, so that the
- Power flow from the AC voltage supply network 8 can be controlled into the intermediate circuit.
- the rectifier 3 preferably again has a module on which the diodes of the rectifier are integrated and on which a further controllable semiconductor switch is also integrated, which can be referred to as a brake chopper.
- the brake chopper has another resistor, which is called the braking resistor
- the DC / DC converter 5 also includes a further controllable semiconductor switch that is integrated, which can be referred to as a brake chopper.
- This brake chopper is connected in series with a further resistor, which can be referred to as a braking resistor, this series connection also consisting of the DC voltage-side connection of the supply module 1 or the am
- Energy store 6 applied voltage can be fed.
- the security of the system is increased in that the energy store can be discharged in a controlled manner.
- Discharging takes place in such a way that the brake chopper of the respective brake resistor is controlled depending on the unipolar voltage or on the voltage U applied to the series circuit formed by the brake resistor and the associated brake chopper in such a way that the respective brake resistor R has a constant power is fed.
- This electrical power P supplied to the respective braking resistor permanently until the energy store is practically completely discharged is specified as high as possible. It is therefore preferably the same as the rated power of the braking resistor R.
- the voltage U is recorded and the respective brake chopper is preferably controlled with a pulse width modulation ratio (1 / U) * (P * R) L 1.
- the power supplied to the respective braking resistor remains constant even when the voltage U drops.
- the nominal power that is to say also the power P, is less than the maximum when the electric motor is operating as a generator from the electric motor via the inverter 2
- the ohmic resistance of the respective braking resistor R can therefore be selected to be very small and therefore a practically complete discharge can be achieved in a short time.
- the pulse width modulation can even be replaced by permanently closing the controllable switch. In this way, a particularly fast total discharge is made possible. As soon as the voltage falls below a second, even smaller threshold value, the switch is then opened again in order to protect the battery cells against destruction.
- Braking resistors convertible into heat. If the series circuit formed from the braking resistor and the brake chopper assigned to it is fed directly from the voltage applied to the energy store, deep discharging of the energy store is made possible in a simple manner because the DC / DC converter 5 cannot work without a minimum voltage and thus below the
- Minimum voltage no discharge through the braking resistors can be carried out. This is because the series circuit formed from the respective brake chopper and the braking resistor is only supplied indirectly via the DC / DC converter 5 from the energy store.
- the supply module 1 When the energy store 6 is discharged, the supply module 1 does not conduct any electrical power from the AC voltage supply network to the intermediate circuit.
- the power supply unit 9 can be supplied on the one hand from the AC voltage supply network 8 and on the other hand can be supplied from the intermediate circuit, that is to say from a
- the power supply 9 is within a period of time after the occurrence of the power failure
- Low voltage in particular 24 volts, can be provided.
- the time span is limited, however, by the energy which is present in the storage device 6 and, if necessary, by further power sinks arranged on the intermediate circuit.
- At least sub-areas i.e. signal electronics areas
- components of the system such as, for example, a sub-area of the signal electronics of the supply module 1, a sub-area of the signal electronics of the DC / DC converter 5, a sub-area of the signal electronics 3 of the inverter 2, the higher-level controller 10 and other consumers that can be fed by the low voltage.
- Energy store 6 provided voltage to the first voltage required in the intermediate circuit, that is to say the nominal voltage of the intermediate circuit, up or possibly also down. This first voltage is greater than the minimum voltage, in particular 400 volts.
- the inverter 2 is switched off below the minimum voltage.
- sensors are attached to the supply module 1 on the network side, in particular means for detecting the phase voltages of the as
- Three-phase voltage network executed alternating voltage supply network.
- Signal electronics of the supply module 1 also function as an evaluation unit for the signals from these sensors arranged on the supply module 1 on the network side. As soon as a power failure is detected, corresponding information is reported to the other bus users via the data bus, in particular also to the DC / DC converter 5 designed as a bus user.
- the DC / DC converter 5 continues to provide the
- the intermediate circuit nominal voltage is available to the intermediate circuit until the inverter 2 is in a safe state, in particular that supplied by the inverter 2
- the DC / DC converter 5 After receiving the information about reaching the safe state, the DC / DC converter 5 only provides a second voltage to the intermediate circuit, which is lower than the minimum voltage, but in particular is higher than the lowest voltage that the power supply unit 9 needs for its operation needed.
- the second voltage is more than 150 volts or only slightly more than 24 volts, so that 24 volts or just 24 volts can be made available by the power pack.
- the power consumed by the system is preferably determined by signal electronics of the DC / DC converter 5 from the current flowing from the DC / DC converter 5 into the intermediate circuit and the voltage detected at the intermediate circuit, and from this, taking into account the charging energy currently available in the memory 6 the respective remaining runtime is determined, the remaining runtime being the time in which the power supply unit is still able to provide the second voltage to the intermediate circuit.
- the current flowing through the respective braking resistor is detected and from that via the braking chopper
- time-averaged voltage as well as the recorded and time-averaged current determines the current resistance value of the braking resistor and below
- the surrounding heat transfer resistance can be taken into account.
- Pulse width modulation frequency used, but the pulse width modulation frequency is changed over time or continuously. In this way, less disruptive noise emission can be brought about.
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Rectifiers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019004979 | 2019-07-18 | ||
| PCT/EP2020/025299 WO2021008725A1 (de) | 2019-07-18 | 2020-06-25 | Verfahren zum betreiben eines systems und system mit einem versorgungsmodul, einem wechselrichter, einem energiespeicher und einem netzteil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4000158A1 true EP4000158A1 (de) | 2022-05-25 |
Family
ID=71401703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20735266.7A Pending EP4000158A1 (de) | 2019-07-18 | 2020-06-25 | Verfahren zum betreiben eines systems und system mit einem versorgungsmodul, einem wechselrichter, einem energiespeicher und einem netzteil |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4000158A1 (de) |
| DE (2) | DE102020003799A1 (de) |
| WO (1) | WO2021008725A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024206907A1 (de) * | 2024-07-23 | 2026-01-29 | Siemens Aktiengesellschaft | Stromrichter mit Hilfsspannungsversorgung |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6504497B2 (en) * | 2000-10-30 | 2003-01-07 | Delta Electronics, Inc. | Hold-up-time extension circuits |
| KR101236621B1 (ko) * | 2011-12-14 | 2013-02-22 | 엘에스산전 주식회사 | 인버터 제어장치 |
| JP5670398B2 (ja) * | 2012-09-10 | 2015-02-18 | ファナック株式会社 | 少なくとも2つの抵抗放電手段を有するモータ制御装置 |
| DE102013006964B4 (de) * | 2013-03-27 | 2024-01-25 | Sew-Eurodrive Gmbh & Co Kg | Vorrichtung mit Energiespeicher und Wechselrichter und Verfahren zum Betreiben einer Vorrichtung |
| KR101583881B1 (ko) * | 2013-12-10 | 2016-01-21 | 현대자동차주식회사 | 배터리용 충전 제어 장치 및 방법 |
| DE102014004282A1 (de) * | 2014-03-26 | 2015-10-01 | Sew-Eurodrive Gmbh & Co Kg | Verfahren zum Betreiben eines Antriebssystems und Antriebssystem zur Durchführung eines Verfahrens |
| DE102014116689B4 (de) * | 2014-11-14 | 2025-12-24 | Minebea Mitsumi Inc. | Vorrichtung und Verfahren zum Sichern einer Antriebssteuerung gegen Versorgungsspannungsausfälle |
| EP3516760A1 (de) * | 2016-09-22 | 2019-07-31 | SEW-Eurodrive GmbH & Co | System und verfahren zum betreiben eines systems |
-
2020
- 2020-06-25 DE DE102020003799.2A patent/DE102020003799A1/de active Pending
- 2020-06-25 EP EP20735266.7A patent/EP4000158A1/de active Pending
- 2020-06-25 DE DE102020006626.7A patent/DE102020006626A1/de active Pending
- 2020-06-25 WO PCT/EP2020/025299 patent/WO2021008725A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021008725A1 (de) | 2021-01-21 |
| DE102020006626A1 (de) | 2021-01-21 |
| DE102020003799A1 (de) | 2021-01-21 |
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