Classifications

• • 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
  • H02M3/00—Conversion of DC power input into DC power output
  • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
  • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
  • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
  • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
  • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
  • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
  • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
  • H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
• • 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
  • H02M1/0003—Details of control, feedback or regulation circuits
  • H02M1/0009—Devices or circuits for detecting current in a converter
• • 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
  • H02M3/00—Conversion of DC power input into DC power output
  • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
  • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
  • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
  • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
  • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
  • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
  • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
  • H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
  • H02M3/1586—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved

Definitions

• the invention relates to a multi-phase DC-DC converter for transporting energy between two networks
• each converter circuit having at least one first controllable switching element and a choke
• a PWM generator per converter circuit for generating a PWM signal for driving the first controllable switching element of the associated converter circuit, wherein the PWM generators are suitable and adapted to generate the PWM signals so that the first switching elements of the converter circuits with different Phases are switched on.
• multiphase DC-DC converters have been developed. These have a plurality of converter circuits, sometimes called converter cells or cells, which are operated out of phase.
• a multiphase DC-DC converter with the features listed at the beginning is disclosed in the document DE 10 2007 043 603 A1.
• the object of the invention is to propose an alternative multiphase DC-DC converter, which prevents in particular in coupled reactors of the converter circuits equalizing currents between the converter circuits.
• the chokes of the converter circuits are arranged on a core and are so coupled.
• Each converter circuit has a current sensor for detecting a current through the inductor of the converter circuit or a current emulator for emulation of a current through the inductor of the converter circuit and
• each converter circuit has a regulator which is connected to the first regulator and to the current sensor or current emulator associated with the converter circuit and to the PWM generator associated with the converter circuit,
• controller for controlling the current through the choke of the associated converter circuits are suitable and arranged.
• the erfindunstrae multiphase voltage converter includes converter circuits with its own controller and its own current sensors.
• the current through the reactor of each converter circuit can be controlled by its own control loop. Compensation currents between the converter circuits can be avoided.
• Equalizing currents can be avoided in particular even when the reactors of the converter circuits are coupled.
• the converter circuits are preferably connected in parallel.
• the regulators of a multiphase DC-DC converter according to the invention can be acted upon by the control or control means, each with a reference variable.
• the controllers can be directly connected to the control or control means.
• the control or control means generates a control variable for each control loop the to be provided by the converter circuit of the loop current.
• the sum of the currents provided by the converter circuits corresponds to the current generated by the polyphase DC-DC converter.
• each PWM generator can be connected directly to a manipulated variable output of the controller, which is assigned to the same converter circuit as the PWM generator.
• the converter circuits may be boost converter circuits, ie boost converters.
• the converter circuits may include a peak current detection and / or one or more current emulators in place of the current sensors.
• Fig. 1 is a simplified block diagram of a multi-phase DC-DC converter according to the invention.
• the multiphase DC-DC converter according to the invention has three converter circuits.
• the three converter circuits are preferably constructed identically. They have a first switching element M1, M3, M5.
• the first switching elements are normally-conductive N-channel MOSFETs whose drain terminals are brought together and connected to a first terminal BN1 of the polyphase DC-DC converter for the positive voltage of a first network.
• the source terminals of the first switching elements M1, M3, M5 are each connected to inductors L1, L2, L3. In series, measuring resistors R1, R2, R3 are connected.
• the terminals L1, L2, L3 facing away from the terminals of the measuring resistors R1, R2, R3 are connected to each other and to a second terminal BN2 of the polyphase DC-DC converter for the positive voltage of a second network. Both the first terminal BN1 and the second terminal BN2 of the multiphase DC-DC converter are connected to the reference potential via a capacitor C1, C2.
• the source terminals of the first switching elements M1, M3, M5 are also connected via second switching elements M2, M4, M5 to the reference potential.
• the drain terminals of the second switching elements M2, M4, M5 are connected to the source terminals of the first switching elements M1, M3, M5 and the source terminals of the second switching elements M2, M4, M5 are connected to the reference potential.
• Both the gate terminals of the first switching elements M1, M3, M5 of the converter circuits and the gate terminals of the second switching elements M2, M4, M5 of the converter circuits are each connected to a control circuit 2, 3, 4 associated with each converter circuit.
• the control circuits 2, 3, 4 include a regulator and a PWM generator.
• the control circuits 2, 3, 4 are connected to current sensors 5, 6, 7, which detect the current through the measuring resistors R1, R2, R3 and thus through the inductors L1, L2, L3.
• a signal indicative of the current is supplied to the control circuits 2, 3, 4.
• the current signal is compared with a reference variable, which is specified by a control and regulation means 1 for each converter circuit.
• the control difference between the reference variable and the current signal resulting from the comparison, i. the controlled variable is supplied in the PWM generators, which generate the signals for driving the first switching elements M1, M3, M5 and the second switching elements M2, M4, M5.
• the first switching elements and the second switching elements of a converter circuit are preferably alternately closed and opened.
• each a clock signal supplied which is generated by a clock generator 8, 9, 10.
• the Clock generators 8, 9, 10 generate clock signals which are shifted from each other but have the same length and duty cycle.
• the clock generators 8, 9, 10 may be linked together (not shown) to ensure that the phase between the clock signals is always constant, preferably 120 °, when three converter circuits are provided.
• the first switching elements M1, M3, M5 are turned on at a rising edge of the clock signal and the second switching elements M2, M4, M5 are turned off at a rising edge of the clock signal.
• the switching off of the first switching elements M1, M3, M5 and the switching on of the second switching elements M2, M4, M5 takes place as a function of the current which is measured by the current sensors 5, 6, 7 and in dependence on the control variables predetermined by the control means 1 ,
• the converter circuits operate on an energy transport from the first network to the second network as an up-converter, i. the voltage in the first network is lower than the voltage in the second network. In the reverse direction of transport of energy, the converter circuits can also be operated as a buck converter.
• the chokes L1, L2, L3 are coupled together, which is achieved by arranging the chokes on a common core.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Dc-Dc Converters (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=48703554

Family Applications (1)

Country Status (2)

Cited By (2)

Families Citing this family (1)

Citations (1)

Family Cites Families (2)

• 2012
  • 2012-07-12 DE DE102012106262.5A patent/DE102012106262A1/de not_active Withdrawn
• 2013
  • 2013-06-29 WO PCT/EP2013/063752 patent/WO2014009183A2/fr not_active Ceased

Patent Citations (1)

Also Published As

Similar Documents

Legal Events