WO2011070809A1 - Dispositif de direction assistée électrique - Google Patents

Dispositif de direction assistée électrique Download PDF

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Publication number
WO2011070809A1
WO2011070809A1 PCT/JP2010/059009 JP2010059009W WO2011070809A1 WO 2011070809 A1 WO2011070809 A1 WO 2011070809A1 JP 2010059009 W JP2010059009 W JP 2010059009W WO 2011070809 A1 WO2011070809 A1 WO 2011070809A1
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WO
WIPO (PCT)
Prior art keywords
relay
movable
fixed
fixed contacts
electric power
Prior art date
Application number
PCT/JP2010/059009
Other languages
English (en)
Japanese (ja)
Inventor
義則 竹内
文明 石川
Original Assignee
株式会社ショーワ
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 株式会社ショーワ filed Critical 株式会社ショーワ
Priority to CN2010800560592A priority Critical patent/CN102652344A/zh
Priority to US13/512,419 priority patent/US20120234624A1/en
Priority to EP10835732A priority patent/EP2492942A1/fr
Publication of WO2011070809A1 publication Critical patent/WO2011070809A1/fr

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Classifications

    • 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
    • B62D5/0403—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 constructional features, e.g. common housing for motor and gear box
    • B62D5/0406—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 constructional features, e.g. common housing for motor and gear box including housing for electronic control unit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H2050/028—Means to improve the overall withstanding voltage, e.g. creepage distances

Definitions

  • the present invention relates to an electric power steering apparatus.
  • Patent Document 1 As an electric power steering apparatus, as described in Patent Document 1, there is an apparatus capable of controlling the steering of a vehicle by driving an electric motor having three phase windings by a motor driving circuit.
  • the motor drive circuit When the electronic circuit detects, for example, the torque and steering angle of the steering operated by the driver, the motor drive circuit operates to drive the electric motor according to the detection result, and assists the steering operation by the driver.
  • the switch means is set to the above open position, and not only the power supply to each phase winding of the electric motor is cut off, but also each phase winding of the electric motor.
  • the current circuits connected to each other through the transistor of the motor drive circuit are also cut off.
  • the aforementioned switching means includes a first relay interposed in the first phase winding and a second relay interposed in the second phase winding. And the first relay movable contact portion and the second relay movable contact portion are actuated by one electromagnetic operation portion, and the first relay movable contact portion causes the first relay to operate.
  • the fixed contact portion attached to the housing of the second relay by the movable contact portion of the second relay while making the pair of fixed contacts a and b of the fixed contact portion attached to the housing of the second contactable and separable
  • the pair of fixed contacts c and d can be made contactable and separable.
  • the fixed contacts a and b of the first relay and the fixed contacts c and d of the second relay are made of metal wires or the like mixed in the housing of the switch means. Foreign matter may lead to unexpected electrical continuity.
  • the current circuit in which each phase winding of the electric motor is directly connected by a foreign object such as a metal wire is closed. It will be made.
  • the electric motor cannot be controlled by the electronic circuit or the motor drive circuit, and when the driver manually operates the steering and rotates the electric motor, an induced electromotive force is generated in each phase winding of the electric motor, and the steering resistance is applied to the driver. Will give you.
  • An object of the present invention is to provide an electric power steering apparatus having switch means that opens a phase winding of an electric motor in response to a malfunction of the system. It is to prevent.
  • an electric motor having a plurality of phase windings is driven by a motor drive circuit so that the steering of the vehicle can be controlled, and at least first and second phase windings of the electric motor are provided.
  • a switch means on the wire the switch means having a first relay interposed in the first phase winding and a second relay interposed in the second phase winding;
  • the movable contact portion of the relay and the movable contact portion of the second relay are actuated by one electromagnetic operation portion, and the fixed contact attached to the housing of the first relay by the movable contact portion of the first relay
  • the pair of fixed contacts a and b can be connected to and separated from each other, and the pair of fixed contacts c and d of the fixed contact portion attached to the housing of the second relay are moved by the movable contact portion of the second relay.
  • the switching means includes at least two fixed contacts between at least two fixed contacts of the four fixed contacts a and b of the first relay and the fixed contacts c and d of the second relay.
  • a blocking means for blocking the extension of the foreign matter that extends from one of the two to the other and enables the electrical connection of the fixed contacts is provided.
  • the movable contact portion of the first relay and the movable contact portion of the second relay are arranged on both sides of the movable holder driven by one electromagnetic operation portion.
  • the blocking means is provided with a fixed partition wall in the housing that divides a region where each of the at least two fixed contacts is installed, and the movable partition wall provided in the center of the movable holder is located on the side of the fixed partition wall.
  • the movable partition wall is always arranged on the side opposite to the movable partition wall in a direction orthogonal to the movable direction of the movable partition wall via a gap.
  • the blocking means is provided between the fixed contact a on the winding side of the first relay and the fixed contact c on the winding side of the second relay. It is intended to be provided.
  • the blocking means includes a fixed contact b on the motor drive circuit side of the first relay and a fixed contact on the motor drive circuit side of the second relay. It is provided between the contacts d.
  • an electric motor having a plurality of phase windings is driven by a motor drive circuit so that the steering of the vehicle can be controlled, and at least one phase winding of the electric motor is provided with a switch means.
  • the switch means is capable of connecting and separating the pair of fixed contacts of the fixed contact portion attached to the housing by the movable contact portion, the switch means is fixed between the pair of fixed contacts.
  • a blocking means is provided that extends from one of the contacts to the other and blocks the extension of foreign matter that enables electrical connection of the fixed contacts.
  • the switch means has a first relay interposed in the first phase winding and a second relay interposed in the second phase winding, and the movable contact of the first relay And a movable contact portion of the second relay are operated by one electromagnetic operation portion, and a pair of fixed contact portions attached to the housing of the first relay by the movable contact portion of the first relay.
  • the fixed contacts a and b can be contacted and separated, and the pair of fixed contacts c and d of the fixed contact portion attached to the housing of the second relay can be contacted and separated by the movable contact portion of the second relay.
  • the switch means includes at least two fixed contacts among at least two fixed contacts of the fixed contacts a and b of the first relay and the fixed contacts c and d of the second relay. Extends from one of the two fixed contacts to the other Te provided blocking means for blocking the extension of the foreign object to enable electrical conduction of those fixed contacts.
  • the fixed contacts a and b of the first relay and the fixed contacts c and d of the second relay make unexpected electrical continuity due to foreign matters such as metal wires mixed in the housing of the switch means. Can be prevented. Therefore, the electric motor can always be stably controlled by the electronic circuit or the motor drive circuit.
  • the fixed partition wall and the movable partition wall constituting the blocking means constitute a labyrinth seal structure that blocks at least two regions described above in the entire movement range in which the movable partition wall moves according to the movable stroke of the movable holder. .
  • foreign matters such as metal wires mixed in the housing of the switch means do not extend from one of the two regions to the other, and the fixed contacts are brought into electrical conduction. It can be surely prevented.
  • Switch means is provided in at least one phase winding of an electric motor, and the switch means is capable of moving a pair of fixed contacts of a fixed contact portion attached to the housing by a movable contact portion.
  • the switch means is provided between the pair of fixed contacts with a blocking means for blocking the extension of foreign matter that extends from one of the two fixed contacts to the other to enable electrical conduction of the fixed contacts. Therefore, even when the switch means is provided in one phase winding of the electric motor, each fixed contact of the switch means is prevented from being electrically connected due to foreign matter mixing, and the electric motor is always stabilized by an electronic circuit or a motor drive circuit. Can be controlled.
  • FIG. 1 is a circuit diagram showing a motor control circuit of the electric power steering apparatus.
  • FIG. 2 is a schematic sectional view showing the switch means.
  • FIG. 3 is a schematic cross-sectional view taken along line III-III in FIG.
  • FIG. 4 is a schematic cross-sectional view showing the blocking means.
  • FIG. 5 is a schematic sectional view showing a modification of the blocking means.
  • FIG. 1 shows a motor control circuit of the electric power steering apparatus.
  • the electric motor 10 is connected to the steering system of the vehicle and is driven by the operation of the motor drive circuit 20 so that the steering of the vehicle can be controlled.
  • the electronic circuit 30 detects, for example, the torque and the steering angle of the steering operated by the driver, and the motor drive circuit 20 is activated according to the detection result.
  • the electric motor 10 is a brushless motor having a plurality of, in this embodiment, three phase windings U, V, and W connected at a star point.
  • the motor drive circuit 20 has a three-phase bridge circuit, and is connected between an end of a winding (U, V, W) of each phase of the motor and a power supply terminal 20A connected upstream of the bridge circuit.
  • Transistors 21A, 22A, and 23A, and transistors 21B, 22B, and 23B connected between the ends of the windings (U, V, and W) of each phase of the motor and the ground terminal 20B. These transistors 21A to 23A and 21B to 23B are switched or excited or not excited by the electronic circuit 30 described above.
  • the switch means 40 is provided in at least the first and second phase windings connecting the electric motor 10, in this embodiment, the first phase winding U and the second phase winding V. As shown in FIGS. 1 to 3, the switch means 40 is interposed in the housing 41 in a first relay 50 interposed in the first phase winding U and a second phase winding V. Second relay 60.
  • the switch means 40 is formed by molding metal elongated rectangular conductive leaf springs 44 and 45 on both sides of a resin movable holder 43 that is moved up and down by a pusher 42A of one electromagnetic operation section 42.
  • Each of the springs 44 and 45 forms a movable contact portion 51 of the first relay 50 and a movable contact portion 61 of the second relay 60.
  • the electromagnetic operating section 42 has a core and a coil, and a movable holder 43 is held by a pusher 42A driven by the electromagnetic operating section 42 via a connecting plate 42B.
  • the switch means 40 is turned on or off by the electronic circuit 30 when the electronic circuit 30 detects a malfunction of the system of the electric motor 10 or the motor drive circuit 20, and is generated by passing a current through the coil of the electromagnetic operation unit 42.
  • the pusher 42A is driven by the suction force, and the pusher 42A depresses the movable holder 43 at the upper end position of the movable stroke and the leaf springs 44 and 45 in the free state to the lower end position of the movable stroke.
  • the movable contact portion 51 of the relay 50 and the movable contact portion 61 of the second relay 60 are moved downward.
  • the first relay 50 is turned on (conductive).
  • the pair of fixed contacts c and d of the fixed contact portion 62 composed of the conduction bus bar of the phase winding V, which is attached to the housing 41 of the second relay 60 by the movable contact portion 61 of the second relay 60. Accordingly, the second relay 60 is turned on (conductive).
  • the switch means 40 is configured such that the fixed contacts a to d of the fixed contact portions 52 and 62 of the first and second relays 50 and 60 are electrically connected to each other by foreign matter such as a metal wire entering the housing 41. In order to prevent this, the following configuration is provided.
  • the switch means 40 includes at least two of the four fixed contacts of the fixed contacts a and b of the first relay 50 and the fixed contacts c and d of the second relay 60.
  • a blocking means 70 is provided that extends from one of the two fixed contacts to the other and blocks the extension of foreign matter that enables electrical connection between the fixed contacts.
  • the blocking means 70 is fixed to the fixed contact a on the winding (U) side of the first relay 50 and the winding (V) side of the second relay 60. It is provided between the contacts c, and is provided between the fixed contact b on the motor drive circuit 20 side of the first relay 50 and the fixed contact d on the motor drive circuit 20 side of the second relay 60.
  • a movable partition wall 72 provided in the center between the movable contact portions 51 and 61 on the movable holder 43, on the side of the fixed partition wall 71.
  • the movable partition wall 72 is always disposed on the side perpendicular to the vertical direction in which the movable partition wall 72 is moved, on the side opposite to the movable partition wall 72, with a gap G (micro gap) therebetween.
  • the fixed partition wall 71 is composed of a single resin protrusion rib 71A standing on the boundary between the region Z1 and the region Z2 in the resin housing 41, directly below the movable holder 43.
  • the protruding rib 71A is formed integrally with the housing 41.
  • the movable partition wall 72 is composed of two resin protrusion ribs 72A and 72B which are parallel to the protrusion rib 71A on the lower surface of the resin movable holder 43 and sandwich the protrusion rib 71A from both sides via the gap G described above. .
  • the protruding ribs 72A and 72B are formed integrally with the movable holder 43. When the movable holder 43 is at the upper end position of the movable stroke (FIG.
  • the lower ends of the projecting ribs 72A and 72B are lower than the upper end of the projecting rib 71A, and the movable partition 72 is always on the side of the fixed partition 71. Through the gap G, it always faces the side of the fixed partition wall 71.
  • the movable holder 43 is located at the upper end position (FIG. 4A) to the lower end position (FIG. 4B) of the movable stroke, the movable partition wall 72 does not hit the fixed partition wall 71, and the protrusion rib 71A is always two protrusion ribs.
  • the fixed partition wall 71 and the movable partition wall 72 always form a U-shaped gap path in the direction from the region Z1 to the region Z2, and the region Z1 and the region Z1.
  • a labyrinth seal structure is formed between Z2.
  • the switch means 40 includes a first relay 50 interposed in the first phase winding U, and a second relay 60 interposed in the second phase winding V,
  • the movable contact portion 51 of the relay 50 and the movable contact portion 61 of the second relay 60 are actuated by one electromagnetic operation portion 42, and the first relay 50 is moved by the movable contact portion 51 of the first relay 50.
  • the pair of fixed contacts a and b of the fixed contact portion 52 attached to the housing 41 of the second relay 60 can be brought into and out of contact with each other, and the movable contact portion 61 of the second relay 60 is attached to the housing 41 of the second relay 60.
  • the switch means 40 is connected to the fixed contacts a and b of the first relay 50 and the second relay 60.
  • a blocking means 70 that extends from one of the at least two fixed contacts to the other to block the extension of foreign matter that enables electrical connection of the fixed contacts.
  • the fixed contacts a and b of the first relay 50 and the fixed contacts c and d of the second relay 60 are inadvertently caused by foreign matters such as metal wires mixed in the housing 41 of the switch means 40. It is possible to prevent the place where the automatic conduction is made. Therefore, the electric motor 10 can always be stably controlled by the electronic circuit 30 and the motor drive circuit 20.
  • the movable contact portion 51 of the first relay 50 and the movable contact portion 61 of the second relay 60 are provided on both sides of the movable holder 43 driven by one electromagnetic operation portion 42.
  • the blocking means 70 is provided with a fixed partition 71 in the housing 41 that separates the regions Z1 and Z2 where the at least two fixed contacts are respectively installed, and a movable partition 72 provided in the center of the movable holder 43. Is arranged on the side of the fixed partition wall 71 and on the side of the movable partition wall 72 opposite to the movable partition wall 72 in a direction perpendicular to the movable direction of the movable partition wall 72.
  • the fixed partition wall 71 and the movable partition wall 72 constituting the blocking means 70 are labyrinths that block at least the two regions Z1 and Z2 described above in the entire movement range in which the movable partition wall 72 moves according to the movable stroke of the movable holder 43. It constitutes a seal structure.
  • foreign matters such as metal wires mixed in the housing 41 of the switch means 40 do not extend from one of the two regions Z1 and Z2 to the other, and their fixed contacts are unexpectedly electrically connected. It is possible to reliably prevent the place where conduction is established.
  • the blocking means 70 is provided between the fixed contact a on the winding U side of the first relay 50 and the fixed contact c on the winding V side of the second relay 60. Therefore, the current circuit in which the windings U and V of the electric motor 10 are directly connected by a foreign object such as a metal wire is not closed. Thus, when the driver manually operates the steering and rotates the electric motor 10, it is possible to prevent an induced electromotive force from being generated in each phase winding of the electric motor 10 and give unnecessary steering resistance to the driver.
  • the blocking means 70 is provided between the fixed contact b on the motor drive circuit 20 side of the first relay 50 and the fixed contact d on the motor drive circuit 20 side of the second relay 60. Therefore, no malfunction is caused in the control of the electric motor 10 by the electronic circuit 30 or the motor drive circuit 20.
  • FIG. 5 shows a blocking means 80 that replaces the blocking means 70.
  • the blocking means 80 includes a fixed partition 81 that replaces the fixed partition 71 of the blocking means 70 with two protruding ribs 81 A and 81 B provided on the housing 41, and a movable partition 82 that replaces the movable partition 72 of the blocking means 70. This is because it is constituted by a single protruding rib 82A provided on the lower surface of the plate.
  • the movable partition wall 82 does not hit the fixed partition wall 81, and the protrusion ribs 82A are always two protrusion ribs.
  • the fixed partition 81 and the movable partition 82 always form a U-shaped gap path in the direction from the region Z1 to the region Z2, and between the region Z1 and the region Z2. This will form a labyrinth seal structure.
  • the fixed partition wall 71 and the movable partition wall 72 of the blocking means 70 are each formed in a cross shape (or the fixed partition wall 81 and the movable partition wall 82 of the blocking means 80 are formed in a cross shape), and the first relay 50.
  • the four regions Z2d where the fixed contact d of the second relay 60 is installed may be partitioned from each other. These four fixed contacts a to d are designed to cut off the extension of foreign matters that enable electrical conduction.
  • the interrupting means 70 (or the interrupting means 80) is provided between the fixed contact a of the first relay 50 and the fixed contact d of the second relay 60, the electrical connection between the two fixed contacts a and d. Blocks the extension of foreign objects that enable conduction.
  • each winding U, W of the electric motor 10 is connected to the diode 23 connected in parallel to the transistor 23B or 22B and the metal wire between the fixed contacts a, d.
  • the current circuit connected by a foreign substance such as the like is not closed.
  • the present invention enables driving of an electric motor having a plurality of phase windings by means of a motor drive circuit to control the steering of the vehicle, and is provided with switch means in at least one phase winding of the electric motor,
  • the switch means is capable of connecting and separating a pair of fixed contacts of the fixed contact portion attached to the housing by the movable contact portion
  • the switch means is disposed between the two fixed contacts between the pair of fixed contacts. It is also possible to provide a blocking means for blocking the extension of foreign matter that extends from one of the two to the other and enables the electrical connection of the fixed contacts.
  • the present invention drives an electric motor having a plurality of phase windings by means of a motor drive circuit so as to control the steering of the vehicle, and switches between at least first and second phase windings of the electric motor.
  • a switch means having a first relay interposed in the first phase winding and a second relay interposed in the second phase winding, the first relay being movable.
  • the contact portion and the movable contact portion of the second relay are actuated by one electromagnetic operation portion, and a pair of fixed contact portions attached to the housing of the first relay by the movable contact portion of the first relay.
  • the fixed contacts a and b of the second relay can be contacted and separated, and the pair of fixed contacts c and d of the fixed contact portion attached to the housing of the second relay can be connected and separated by the movable contact portion of the second relay.
  • Electric power steering device And the switch means includes at least two fixed contacts between at least two fixed contacts of the four fixed contacts a and b of the first relay and the fixed contacts c and d of the second relay.
  • a blocking means for blocking the extension of the foreign matter that extends from one of the two to the other and enables the electrical connection of the fixed contacts is provided.

Abstract

L'invention concerne un dispositif de direction assistée électrique dans lequel un moyen de commutation (40) est muni, entre au moins deux contacts fixes, parmi quatre contacts fixes (contacts fixes (a, b) d'un premier relais (50) et contacts fixes (c, d) d'un second relais (60)), d'un moyen de blocage (70) pour bloquer la diffusion d'une substance étrangère qui diffuse de l'un à l'autre desdits au moins deux contacts fixes et permet une continuité électrique entre les contacts fixes.
PCT/JP2010/059009 2009-12-10 2010-05-27 Dispositif de direction assistée électrique WO2011070809A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2010800560592A CN102652344A (zh) 2009-12-10 2010-05-27 电动动力转向装置
US13/512,419 US20120234624A1 (en) 2009-12-10 2010-05-27 Electric power steering apparatus
EP10835732A EP2492942A1 (fr) 2009-12-10 2010-05-27 Dispositif de direction assistée électrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009280896A JP5456454B2 (ja) 2009-12-10 2009-12-10 電動パワーステアリング装置
JP2009-280896 2009-12-10

Publications (1)

Publication Number Publication Date
WO2011070809A1 true WO2011070809A1 (fr) 2011-06-16

Family

ID=44145364

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/059009 WO2011070809A1 (fr) 2009-12-10 2010-05-27 Dispositif de direction assistée électrique

Country Status (5)

Country Link
US (1) US20120234624A1 (fr)
EP (1) EP2492942A1 (fr)
JP (1) JP5456454B2 (fr)
CN (1) CN102652344A (fr)
WO (1) WO2011070809A1 (fr)

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WO2014191458A1 (fr) * 2013-05-31 2014-12-04 Tyco Electronics Amp Gmbh Dispositif pour élément commutateur électrique et élément commutateur

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DE102018109403A1 (de) * 2018-04-19 2019-10-24 Tdk Electronics Ag Schaltvorrichtung

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Publication number Priority date Publication date Assignee Title
WO2014191458A1 (fr) * 2013-05-31 2014-12-04 Tyco Electronics Amp Gmbh Dispositif pour élément commutateur électrique et élément commutateur
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Also Published As

Publication number Publication date
EP2492942A1 (fr) 2012-08-29
CN102652344A (zh) 2012-08-29
JP2011121475A (ja) 2011-06-23
US20120234624A1 (en) 2012-09-20
JP5456454B2 (ja) 2014-03-26

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