WO2017137254A1 - Protection de mosfet à protection contre l'inversion de polarité, par mesure de la fem - Google Patents

Protection de mosfet à protection contre l'inversion de polarité, par mesure de la fem Download PDF

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Publication number
WO2017137254A1
WO2017137254A1 PCT/EP2017/051468 EP2017051468W WO2017137254A1 WO 2017137254 A1 WO2017137254 A1 WO 2017137254A1 EP 2017051468 W EP2017051468 W EP 2017051468W WO 2017137254 A1 WO2017137254 A1 WO 2017137254A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
link
circuit
protection
polarity reversal
Prior art date
Application number
PCT/EP2017/051468
Other languages
German (de)
English (en)
Inventor
Panagiotis Kosioris
Nestor Mbogni
AKM Nazmul ALAM
Original Assignee
Robert Bosch Automotive Steering Gmbh
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 Robert Bosch Automotive Steering Gmbh filed Critical Robert Bosch Automotive Steering Gmbh
Priority to CN201780010692.XA priority Critical patent/CN108701988B/zh
Publication of WO2017137254A1 publication Critical patent/WO2017137254A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • H02H11/003—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection using a field effect transistor as protecting element in one of the supply lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
    • B62D5/0481—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures
    • B62D5/0484—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such monitoring the steering system, e.g. failures for reaction to failures, e.g. limp home
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits

Definitions

  • the present invention relates to a device for steering a vehicle and a method for preventing damage to a reverse polarity protection of a steering of a vehicle.
  • disconnectors and switches are known as polarity reversal protection.
  • These circuit breakers can be designed in particular as Mosfets.
  • Disconnectors are particularly necessary to turn off individual electric motors or controls of electric motors of a steering system. In this way, a steering ability can be obtained despite the failure of an electric motor or servomotor of the steering system.
  • switching off a servomotor can lead to the generation of a high electromotive force (eg switching off inductance). This electromotive force may exceed the dielectric strength of the corresponding circuit breaker, which may result in damage to the circuit breaker.
  • Other power switches, in particular reverse polarity protection can also be affected. It is therefore an object to provide a device which provides protection of reverse polarity protection against high electromotive force.
  • a device for steering a vehicle comprising: an output stage for driving an electric motor, a DC link for supplying the output stage with electrical energy, wherein the DC link has a DC voltage, a circuit breaker for decoupling the output stage of the steering and reverse polarity protection to prevent an incorrect connection of a supply voltage to the output stage, the device generates a pulse at high DC link voltage to close the Verpoltikes.
  • a method for preventing damage to reverse polarity protection of a steering system of a vehicle comprising the steps of: measuring a DC link voltage of a vehicle
  • Bridge circuit of a servomotor comparing the DC link voltage with a comparison voltage and if the DC link voltage is greater than the comparison voltage, performing a first measure.
  • a device wherein the polarity reversal protection is designed as mosfet and its intrinsic body diode is directed against the intermediate circuit voltage.
  • the intrinsic body diode is reverse-connected.
  • the electromotive force is above the mosfet.
  • the electromotive Force can be the DC link voltage, especially when reducing the energetic fields of inductances of the electric motor steering.
  • the servomotor corresponds to the electric motor.
  • a device is provided, wherein the intrinsic body diode of the circuit breaker is formed in the direction of the intermediate circuit voltage.
  • Bodydioden Intrinsic body diodes are connected in the forward direction with respect to an electromotive force.
  • an apparatus having a circuit for comparing the intermediate circuit voltage with a reference voltage, wherein
  • the circuit if the intermediate circuit voltage is greater than the reference voltage, the circuit generates a pulse to close the Verpolschutzes.
  • a device wherein, if the circuit has a pulse to close the
  • an electromotive force for example, due to an inductance of the servo motor, are degraded, without causing damage to components.
  • a method wherein the first measure is the switching on of the power switch of the reverse polarity protection.
  • the first measure is the switching on of the power switch of the reverse polarity protection.
  • it can be considered to provide a circuit which detects an electromotive force of a servomotor and / or a final stage of a steering. Upon detection of a high electromotive force, which may result in damage to an open power switch, the corresponding power switch is closed. This can prevent damage to the power switch. In particular, it can be ensured that the electromotive force discharges via a voltage source.
  • Fig. 1 shows a circuit with a detection circuit of a high electromotive force
  • FIG. 2 shows a flow chart with a method according to the invention.
  • Fig. 1 shows two servomotors / electric motors 1, 2 a steering of a vehicle.
  • the individual phases el, e2, e3 of the electric motors 1, 2 are each from
  • Half bridges 3, 4 controlled.
  • the half bridges of an electric motor represent its output stage.
  • Voltages V2, V3 are applied to the half bridges 3, 4. If the half-bridges 3, 4 are switched off, for example because of a disturbance of the relevant servomotor 1, 2 or a bridge circuit 3, 4, very high levels can occur
  • Voltages V2, V3 result due to an electromotive force. These electromotive force can lead to damage of the corresponding circuit breaker 8, 9 and / or the polarity reversal protection 7. In particular, the mosfet of the polarity reversal protection is at risk because its intrinsic body diode is connected in terms of an electromotive force in the reverse direction.
  • a circuit 6 is provided which measures the voltage V2, V3 across the bridge circuits 3, 4, for example by comparison with a predetermined one
  • the polarity reversal protection 7 and / or the circuit breaker 8, 9 may be formed as Mosfets.
  • the circuit breaker 8, 9 are shown with their intrinsic diodes 13 and the reverse polarity protection 7 with its intrinsic diode 14. If there is a high emf (electromotive force) of the electric motor 1, the circuit breaker 8 through its diode 13 in Forward direction switched. However, the polarity reversal protection 7 is not switched in the direction of flow, since the diode 14 is arranged in the reverse direction. At a high EMF, therefore, a pulse must be sent to the polarity reversal protection 7 by the device 6, so that the polarity reversal protection 7 is turned on. Otherwise, too high a voltage at the polarity reversal protection 7 fall off, which can lead to its destruction. After switching through the reverse polarity protection, the EMF of the electric motor 1 drops via the disconnector 8 and via the polarity reversal protection 7, whereby a division of the EMF occurs on two circuit breakers.
  • emf electrostatic force
  • Fig. 2 shows a flowchart with a measuring process in which a
  • DC link voltage is compared with a reference voltage 11. If it is found that the DC link voltage is greater than the reference voltage, fiction, it is assumed that there is a high electromotive force, the endangerment of a corresponding circuit breaker and / or
  • a measure 1 can be initiated, which leads to the electromotive force being limited or being reduced or being distributed to a plurality of electronic components, in particular mosfets.
  • the distribution of electromotive force can be achieved by that

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

La présente invention concerne un dispositif pour diriger un véhicule, comprenant : un étage terminal (3, 4) pour commander un moteur électrique (1, 2), un circuit intermédiaire pour alimenter l'étage terminal (3, 4) en énergie électrique, le circuit intermédiaire présentant une tension de circuit intermédiaire (V2, V3), un sectionneur (8, 9) pour déconnecter l'étage terminal (3, 4) de la direction, et une protection contre l'inversion de polarité (7) pour éviter une connexion inversée d'une tension d'alimentation (5) à l'étage terminal (3, 4), le dispositif, en la présence d'une tension de circuit intermédiaire (V2, V) élevée, générant une impulsion pour fermer la protection contre l'inversion de polarité (7).
PCT/EP2017/051468 2016-02-10 2017-01-25 Protection de mosfet à protection contre l'inversion de polarité, par mesure de la fem WO2017137254A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780010692.XA CN108701988B (zh) 2016-02-10 2017-01-25 通过emk-测量对于反极性保护-金属氧化物半导体场效应晶体管进行保护

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016102264.0A DE102016102264A1 (de) 2016-02-10 2016-02-10 MOSFET-Schutz durch EKM-Messung
DE102016102264.0 2016-02-10

Publications (1)

Publication Number Publication Date
WO2017137254A1 true WO2017137254A1 (fr) 2017-08-17

Family

ID=57914960

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/051468 WO2017137254A1 (fr) 2016-02-10 2017-01-25 Protection de mosfet à protection contre l'inversion de polarité, par mesure de la fem

Country Status (3)

Country Link
CN (1) CN108701988B (fr)
DE (1) DE102016102264A1 (fr)
WO (1) WO2017137254A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108189906A (zh) * 2017-12-08 2018-06-22 联创汽车电子有限公司 电动助力转向系统及其防倒拖方法
DE102022210645A1 (de) 2022-10-10 2024-04-11 Robert Bosch Gesellschaft mit beschränkter Haftung Elektrische Schaltung zum Schutz von Halbleiterschaltern in Hochvoltnetzen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0806827A1 (fr) * 1996-05-09 1997-11-12 Siemens Aktiengesellschaft Circuit de protection contre l'inversion des bornes de la batterie
DE19941489A1 (de) * 1999-09-01 2001-03-15 Bosch Gmbh Robert Schutzschaltung für eine Reihenschaltung aus Leistungshalbleiter-Endstufe und induktivem Verbraucher
EP1860774A1 (fr) * 2006-05-22 2007-11-28 Fujitsu Ten Limited Circuit de protection contre l'inversion de polarité
US20100208401A1 (en) * 2008-08-11 2010-08-19 Autonetworks Technologies, Ltd. Inductive load driving circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI294715B (en) * 2004-03-25 2008-03-11 O2Micro Int Ltd Secondary battery protection circuit with over voltage transient protection, battery pack and electronic device using the same
DE102008050543A1 (de) * 2008-10-06 2010-04-15 Siemens Aktiengesellschaft Schutzschaltung für einen Zwischenkreis eines Wechselrichters, insbesondere eines Solarwechselrichters, gegen Überspannungen
DE102010042522A1 (de) * 2010-10-15 2012-04-19 Zf Lenksysteme Gmbh Verfahren zum Betreiben eines Elektromotors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0806827A1 (fr) * 1996-05-09 1997-11-12 Siemens Aktiengesellschaft Circuit de protection contre l'inversion des bornes de la batterie
DE19941489A1 (de) * 1999-09-01 2001-03-15 Bosch Gmbh Robert Schutzschaltung für eine Reihenschaltung aus Leistungshalbleiter-Endstufe und induktivem Verbraucher
EP1860774A1 (fr) * 2006-05-22 2007-11-28 Fujitsu Ten Limited Circuit de protection contre l'inversion de polarité
US20100208401A1 (en) * 2008-08-11 2010-08-19 Autonetworks Technologies, Ltd. Inductive load driving circuit

Also Published As

Publication number Publication date
CN108701988B (zh) 2020-08-11
CN108701988A (zh) 2018-10-23
DE102016102264A1 (de) 2017-08-10

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