EP1285489A2 - Circuit avec disjoncteur - Google Patents

Circuit avec disjoncteur

Info

Publication number
EP1285489A2
EP1285489A2 EP01947313A EP01947313A EP1285489A2 EP 1285489 A2 EP1285489 A2 EP 1285489A2 EP 01947313 A EP01947313 A EP 01947313A EP 01947313 A EP01947313 A EP 01947313A EP 1285489 A2 EP1285489 A2 EP 1285489A2
Authority
EP
European Patent Office
Prior art keywords
voltage
interface
switch
circuit arrangement
determined
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.)
Withdrawn
Application number
EP01947313A
Other languages
German (de)
English (en)
Inventor
Richard Bürk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Turbo GmbH and Co KG
Original Assignee
Voith Turbo GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voith Turbo GmbH and Co KG filed Critical Voith Turbo GmbH and Co KG
Publication of EP1285489A2 publication Critical patent/EP1285489A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch

Definitions

  • the invention relates to a circuit arrangement with a circuit breaker, a control unit and an evaluation or diagnostic method with such a circuit arrangement or with such a control unit.
  • Circuit arrangements with a circuit breaker are used in electronic control units, for example engine control units or transmission control units, and offer the possibility of digital
  • Control circuits that represent a switch due to the monolithically integrated interconnection of a circuit and a power semiconductor and at the same time are able to take over control, protection and monitoring functions.
  • This power semiconductor comprises a complex architecture with fields of resistors and
  • Diodes and an internal voltage source Diodes and an internal voltage source.
  • the module can only be switched as an output, it must be controlled via special interfaces by CMOS circuits.
  • CMOS circuits Various logic channels are integrated in the module, which link the external control signals with internal signals and from them the
  • the complicated structure, in particular the circuit breaker and its limitation can only be used as a pure output.
  • the known circuit breakers in the circuit arrangements are rigid and inflexible with regard to their diagnostic function, since the diagnosed states are divided into fixed grids, the limit values of which cannot be changed, and thus restrict the applicability of the circuit arrangement in different systems.
  • control devices have the disadvantage that they have to be designed for the individual area of application, in particular because of their circuit arrangements with inflexible circuit breakers.
  • control devices are available that can be used to detect the state of an electrical component, such as a switch or sensor, that is, that can only be used or connected as an input.
  • These known control units also have the disadvantage that their response thresholds or idle levels are fixed by the hardware used.
  • the control devices of the other type, which is available, can only take on control functions, that is, they can only be used as an output or as
  • Power output can be used.
  • the object of the present invention is therefore to avoid the disadvantages of the prior art described and to provide a control device, the manufacture of which can be carried out in a standardized manner to a greater extent than the control devices of the prior art.
  • control device should be specified that is universal can be used and has such flexible hardware that it can be used both as an input and as an output.
  • Circuit arrangement or be represented with such a control unit.
  • the control device comprises an on / off switch, which is used in particular as a relay or semiconductor switch, e.g. Power MOSFET or transistor can be designed, a connection for an external voltage supply and a ground connection.
  • the control device further comprises two interfaces, a first interface being connected such that it is input or output.
  • the same hardware can be used either to detect an external input signal or level or for diagnosis - by connecting the first interface as an input - or for power control - by connecting the first interface as an output. Even when the first interface is connected as an output, the state of the first interface is diagnosed possible, for example whether the circuit is interrupted, a short circuit is present or a consumer is connected to ground or a voltage supply.
  • the second interface is used to connect an evaluation or diagnostic unit and thus enables extremely flexible evaluation of the recorded data / states.
  • the control device comprises a voltage divider, which can advantageously be implemented by two ohmic resistors. The voltage divider enables the idle level of the first interface of the control unit to be set. Since the control unit and thus the voltage divider are connected to an external power supply, the idle level is set in
  • a second voltage divider is connected upstream of the second interface and is used to adapt the voltage, in particular to the subsequent evaluation unit. This is particularly advantageous if one is connected to the second interface
  • Evaluation unit is connected, the input of which is designed for lower voltages.
  • an attenuator can be connected particularly advantageously in front of the second interface.
  • the voltage divider is implemented by two ohmic resistors.
  • the open circuit level of the circuit breaker, ie for the first interface, can be set by selecting the resistance value.
  • Two identical ohmic resistors can advantageously be switched so that the idle level corresponds to 50% of the voltage of the voltage supply.
  • a version with different ohmic resistances for shifting the idle level in the direction of ground is particularly advantageous when the on / off switch is switched as a high-side switch.
  • it is particularly advantageous to shift the idle level in the direction of the voltage of the voltage supply which can be, for example, 24 volts.
  • the control device comprises an on / off switch, which in a special embodiment is a low-side switch. This is particularly advantageous when a load is connected to the voltage supply.
  • the on / off switch is a high-side switch, which is particularly advantageous when a load is connected to ground.
  • the invention comprises an electronic circuit arrangement with a circuit breaker, which has the same features as the control device according to the invention.
  • An analog-digital converter can be connected particularly advantageously behind the second interface.
  • a computer is additionally connected behind the second interface. That's the way it is for example, it is possible to connect the analog input of the analog-digital converter directly to the second interface, and to connect the digital output of the analog-digital converter to the computer. Of course, it is also possible to connect a computer directly behind or to the second interface. Also a
  • Voltage divider or an attenuator can be connected behind the second interface, with the advantage of a lower voltage amplitude or lower vibrations in the voltage, which is passed on to the subsequent evaluation / diagnosis unit.
  • circuit arrangements mentioned with an arrangement according to the invention of a circuit breaker and an evaluation or diagnosis unit is above all the great flexibility in evaluating the states.
  • the electronic circuit arrangement comprises a consumer which is connected to the first interface.
  • the circuit breaker works as an output. The diagnosis of the states of the consumer or of the circuit arrangement itself is possible.
  • the interface is switched as an input and the on / off switch remains deactivated.
  • An external switch is then advantageously connected between the first interface and the voltage supply, or in another embodiment an external switch is connected between the interface and ground. This enables signals from external sensors to be detected.
  • an input can be made by software from an output if necessary, and thereby, for example, at
  • control unit is much more flexible.
  • the same circuit arrangement or the same control unit can thus be used for power control and for diagnosing the state of an electrical consumer or for evaluating external switching elements, sensors or transmitters. Accordingly, the
  • the invention comprises a method for evaluating or diagnosing a state of an electronic
  • the voltage present at the second interface is determined using an evaluation / diagnosis unit which is connected to the second interface.
  • the evaluation unit or the diagnosis unit particularly advantageously comprises an analog-digital converter with a downstream computer or a computer with such an interface. The process differentiates whether the first interface is switched as an output or an input, i.e. whether the interface of the control unit / the circuit arrangement as
  • Output for power control or as an input for status detection of an external switching element / sensor is used.
  • Another input variable of the evaluation process is the position of the on / off switch.
  • the voltage determined at the second interface is compared with a voltage band which is divided into voltage ranges.
  • the reference voltage band can be stored particularly advantageously in the evaluation / diagnosis unit, in particular the limits of the voltage bands for
  • the method according to the invention takes into account when evaluating the
  • the voltage divider is used to set an idle level for an open interface. This can be done in particular by selecting appropriate ohmic resistors. According to the invention, however, a voltage divider is also conceivable, which keeps the setting of the idle level variable.
  • the voltage of the voltage supply and / or the voltage level of the idle level can advantageously be measured in order to obtain an exact reference for a later comparison. If the interface is switched as an output and the on / off switch is a high-side
  • Switch that is open, in the method according to the invention a distinction is made between four different states of the electronic circuit arrangement on the basis of the voltage determined at the second interface.
  • a hysteresis is advantageously implemented in the transition area between the individual bands, which prevents constant switching in the border area.
  • the four different states of the electronic circuit arrangement mentioned, which can be diagnosed on the basis of the voltage determined at the second interface are as follows:
  • the voltage determined is in a voltage band below the voltage band around the idle level and above the
  • Idle level there is a general error in the Circuit arrangement before, in particular a short circuit against an external external voltage or a defective on / off switch;
  • the on / off switch is a high-side switch and is open, then according to the invention, the one on the second
  • Interface determined voltage makes it possible to differentiate between three different states of the electronic circuit arrangement:
  • the detection of the state is not limited to an external switch; of course, external transmitters or sensors can of course also be identified with regard to their state or with regard to the voltage level transmitted by them.
  • the on / off switch When switching the on / off switch as a low-side switch, a distinction must also be made as to whether the interface is an input or an output is switched, and whether the low-side switch is open or closed. If the interface is switched as an output and the low-side switch is open, the voltage determined at the second interface can be used to distinguish between four different states of the electronic circuit arrangement:
  • the voltage determined is in a voltage band above the voltage band around the idle level and below the
  • the determined voltage is in a voltage band around the
  • Idle level the circuit at the interface is interrupted, especially by an open external switch
  • variable definition of the limits of the individual voltage bands does not restrict the diagnosis of a circuit arrangement expanded with further components and advantageously enables the detection of a wide variety of states.
  • the defective or a vulnerable component for example the on / off switch
  • the defective or a vulnerable component can be deactivated particularly advantageously in order to prevent further damage.
  • warning signals in particular optical or acoustic signals, can be output and error entries can be made in the error memory, for example of a control unit.
  • the circuit breaker can be an independent component in an electronic circuit arrangement, but can of course also be integrated in other components. For example, the integration into a
  • both the high-side switches and the low-side switches are integrated in the circuit breaker of the circuit arrangement or in the control device, which can be controlled optionally, for example via a computer.
  • Figure 1 shows a circuit arrangement according to the invention with the
  • Figure 2 shows a circuit arrangement according to the invention using the first interface as an input and one between the
  • Figure 3 shows a circuit arrangement according to the invention using the first interface as an input and one between the
  • Figure 4 shows a circuit arrangement according to the invention with a
  • Figure 5 shows a flow chart of the method according to the invention
  • FIG. 6 shows a voltage band when the first interface is used as an output and the on / off switch is open
  • FIG. 7 shows a voltage band when the first interface is used as an output and the high-side switch is closed
  • Figure 8 shows a voltage band when using the first interface as an input and open on / off switch
  • Figure 9 shows an inventive control device using the first
  • FIG. 10 shows a control device according to the invention using the first interface as an input for evaluating the state of an external low-side switch
  • Figure 11 shows an inventive control device using the first
  • Interface as an input for evaluating the status of an external high-side switch.
  • FIG. 1 shows a circuit arrangement with a circuit breaker 10.
  • the circuit breaker 10 includes an on / off switch 1, which here
  • High-side switch is because it is connected to a connection for a voltage supply 4. Furthermore, a (first) interface 2 can be seen, to which a consumer 9 is connected.
  • a voltage divider 3 comprises a connection for a voltage supply 4 and a ground connection 5 and in the embodiment shown is a second
  • a second voltage divider 7 is connected behind the second interface 6, which can of course also be connected before the second interface 6 according to the invention.
  • An attenuator 8 is connected behind the second voltage divider 7. This attenuator 8 can also be connected in front of the second interface 6.
  • AD converter 11 is connected behind the attenuator 8 and is in turn connected to a computer 12.
  • AD converter 11 and computer 12 are to be regarded as the evaluation / diagnostic unit. It is also conceivable that the computer 12 is connected directly to the second interface 8 if it has a corresponding input. Since a consumer 9 is connected to interface 2 in the circuit arrangement shown, interface 2 is used as an output in this case.
  • Figure 2 shows a circuit arrangement according to the invention with circuitry or when using the interface 2 as an input.
  • the structure of the circuit breaker 10 and the circuit strand in front of or behind the interface 6 does not differ from the circuit arrangement from FIG. 1.
  • the same elements have the same reference symbols.
  • An external switch 13 is connected between interface 2 and voltage supply 14.
  • Figure 3 shows a further circuit arrangement using the interface 2 as an input. Again, the structure of the circuit breaker 10 and the line in front of or behind the second interface 6 does not differ from FIG. 1 and FIG. 2.
  • an external switch 13 is connected between the interface 2 and ground 15 in this embodiment.
  • FIG. 4 shows a special circuit arrangement according to the invention with an embodiment of the voltage dividers through the interconnection of ohmic resistors.
  • the voltage divider 3 is implemented by connecting an ohmic resistor against the connection to the voltage supply 4 and another ohmic resistor, which according to the invention can have the same size, against the ground connection 5.
  • the second voltage divider 7 is implemented by the
  • the attenuator 8 is advantageously designed with a capacitor connected to the ground connection 5.
  • Interface 2 is used as an output.
  • a consumer 9 is between the
  • FIG. 5 shows a flow diagram of the method according to the invention.
  • the idle level is set. According to the invention, this can be done by the selected design of the voltage divider 3. But it is also the targeted setting of the idle level via, for example, adjustable Resistance conceivable.
  • the voltage at interface 2 will be set depending on the voltage applied to the voltage supply and the load present.
  • a step of measuring the voltage of the voltage supply and / or the voltage level of the idle level can advantageously be introduced in order to have an exact reference value for the subsequent comparison, but is not shown in the embodiment of the method according to the invention described in FIG. 5.
  • the voltage at the interface 2 is subsequently determined, for example via the voltage at the interface 6, and then it is decided on the basis of the states of the interface 2 and the switch 1 with which voltage band the voltage applied to the interface 2 must be compared. If interface 2 is used as an input, care should be taken that the components of the circuit arrangement or in particular the external components e.g. No damage is done to switches, sensors or sensors. This can be ensured, for example, that switch 1 must not be closed.
  • FIG. 6 shows a voltage band with which the voltage determined at the interface 2 can be compared if the interface 2 is switched as an output and the on / off switch 1 is open. If the on / off switch 1 is a high-side switch, then the four regions 34.4 (a) to 34.4 (d) result as useful voltage bands with which the voltage determined at the interface 2 is compared.
  • Ubatt is the one
  • FIG. 7 shows a voltage band which can be used for comparison with the voltage present at interface 2 if the interface is switched as an output and switch 1 is closed.
  • the meaning of the individual voltage bands can be found in claim 39.4.
  • FIG. 8 shows a voltage band for comparison with the voltage determined at interface 2 when interface 2 is switched as input and the on / off switch 1 is open.
  • the meaning of the voltage bands can be found in claim 40.
  • FIG. 9 shows a control device 16 according to the invention, in which the interface 2 is used as an output.
  • the control device 16 comprises a high-side switch 1, for example PRÜFET, transistor or relay, which is connected to the external voltage + Ubatt.
  • PRÜFET high-side switch 1
  • Ubatt external voltage + Ubatt
  • Closing or switching on / off of this switch 1 is controlled by a microcontroller 17.
  • the microcontroller 17 detects the voltage present at the interface 2.
  • voltage dividers - comprising the resistors R1 to R4 - and an attenuator with a capacitor
  • the voltage divider and attenuator set a suitable voltage level which is input to an AD converter and / or comparators 18 connected in front of the input of the microcontroller 17.
  • the voltage dividers and the attenuator are connected in accordance with the voltage dividers 4, 7 and attenuator 8 from FIG. 4 between + Ubatt and the ground GND.
  • An external load (consumer) is connected between interface 2 and ground GND, which is shown here as resistor R5.
  • This consumer is controlled by means of the control unit 16, ie one predetermined power of the consumer is set by means of the control unit 16.
  • FIG. 10 shows the same control unit 16, which this time is used to record or evaluate the state of the external low-side
  • SW1 switch is used.
  • Interface 2 is used as an input.
  • the low-side switch SW1 is connected between interface 2 and GND (ground).
  • the state of the switch can be determined on the basis of the voltage determined at the interface 2, by means of a voltage divider, attenuator, AD converter and / or comparators 18 and microcontroller 17
  • the internal high-side switch 1 always remains in the switched-off state during the detection or evaluation, i. H. always open.
  • FIG 11 shows the identical control unit 16 when using the
  • Interface 2 as an input for recording or evaluating the state of an external high-side switch SW1.
  • the high-side switch SW1 is connected between the interface 2 and + Ubatt. Its state can be inferred from the voltage determined at interface 2. Even with this application, the internal high

Landscapes

  • Keying Circuit Devices (AREA)
  • Electronic Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

L'invention concerne un circuit électronique comportant un disjoncteur. Ledit disjoncteur est composé d'un interrupteur marche/arrêt, d'une première interface, d'un diviseur de tension, d'une connexion destinée à une alimentation de tension extérieure, et d'une connexion à la masse. L'interface est connectée flexiblement de manière à servir d'entrée pour le relevé d'état, et de sortie pour la commande de puissance. Ledit disjoncteur comporte également une deuxième interface destinée à la connexion d'une unité d'exploitation et/ou de diagnostic.
EP01947313A 2000-05-26 2001-05-23 Circuit avec disjoncteur Withdrawn EP1285489A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10025908A DE10025908A1 (de) 2000-05-26 2000-05-26 Leistungsschalter
DE10025908 2000-05-26
PCT/EP2001/005948 WO2001091278A2 (fr) 2000-05-26 2001-05-23 Circuit avec disjoncteur

Publications (1)

Publication Number Publication Date
EP1285489A2 true EP1285489A2 (fr) 2003-02-26

Family

ID=7643520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01947313A Withdrawn EP1285489A2 (fr) 2000-05-26 2001-05-23 Circuit avec disjoncteur

Country Status (6)

Country Link
US (1) US20030169550A1 (fr)
EP (1) EP1285489A2 (fr)
JP (1) JP2003534632A (fr)
CA (1) CA2410829A1 (fr)
DE (1) DE10025908A1 (fr)
WO (1) WO2001091278A2 (fr)

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DE102005004608B3 (de) * 2005-02-01 2006-04-20 Siemens Ag Verfahren und Schaltungsanordnung zum Überprüfen von elektrischen Kontaktierungen zwischen einem ersten Ausgangspin eines ersten Leistungsschalters einer Leistungsschaltvorrichtung und einem externen Knoten
DE102011086626A1 (de) * 2011-11-18 2013-05-23 Continental Automotive Gmbh Integrierte Schaltung zum Schalten von Lasten, Schaltungsanordnung mit einer integrierten Schaltung und einer angeschlossenen Last und Verfahren zum Betreiben einer solchen Schaltungsanordnung
EP2781927A1 (fr) * 2013-03-19 2014-09-24 Delphi Technologies Holding S.à.r.l. Procédé et appareil pour détecter une fonctionnalité de dispositif
DE102017223327A1 (de) * 2017-12-20 2019-06-27 Robert Bosch Gmbh Verfahren zum Überprüfen einer Endstufe zum Ansteuern einer Last

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Also Published As

Publication number Publication date
JP2003534632A (ja) 2003-11-18
DE10025908A1 (de) 2001-08-02
WO2001091278A3 (fr) 2002-05-10
US20030169550A1 (en) 2003-09-11
WO2001091278A2 (fr) 2001-11-29
CA2410829A1 (fr) 2002-11-26

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