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Electric power steering device

A technology of electric power steering and electric motor, which is applied in the direction of power steering mechanism, electromechanical device, steering mechanism, etc., can solve the problems of limited space, no redundant system, etc., and achieve the effect of miniaturization

Pending Publication Date: 2021-03-26
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, although the conventional electric power steering apparatus disclosed in Patent Document 1 does not have a redundant system, since the control unit is arranged on the output side of the output shaft of the motor, the output shaft of the motor passes through the control unit. central part
Therefore, the space for housing the structural elements of the control unit is limited

Method used

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Experimental program
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Embodiment approach 1

[0031] Next, an electric power steering device according to Embodiment 1 of the present application will be described with reference to the drawings. First, the circuit configuration of the electric power steering device according to Embodiment 1 will be described. figure 1 It is an overall circuit diagram of the electric power steering device according to the first embodiment. exist figure 1 Among them, an electric power steering apparatus 100 includes an electric motor 2 that generates an assist torque corresponding to a steering torque that a driver applies to a steering gear (not shown) of a vehicle, and a control unit 1 that controls the electric motor 2 .

[0032] The motor 2 is configured as a three-phase synchronous motor including a first armature winding 2a and a second armature winding 2b. The first armature winding 2 a and the second armature winding 2 b have substantially the same configuration, but are arranged with an electrical angle of 120 degrees shifted f...

Embodiment approach 2

[0109] Next, an electric power steering device according to Embodiment 2 will be described. Figure 6 It is a plan view showing the wall surface and its surroundings of the housing of the electric power steering device according to the second embodiment, which is different from that of the first embodiment described above. Figure 5 Corresponding. The overall circuit diagram and figure 1 same. exist Figure 6 In the case 1e, a first power module 3aa constituting a first inverter circuit 3a and a first power relay 5a, and a power module constituting a second inverter circuit 3b and a second power relay 5b are mounted on the bottom, that is, the inner wall surface of the casing 1e. The second power module is 3cc.

[0110] Here, the second power module 3cc is configured such that the lead-out positions of the power supply terminals 3cp and 3cn are different from the second power module 3bb in the first embodiment described above. That is, in Embodiment 1, it is derived from ...

Embodiment approach 3

[0120] Next, an electric power steering device according to Embodiment 3 will be described. Figure 7 It is a plan view showing the wall surface and its surroundings of the housing of the electric power steering device according to Embodiment 3, which is different from that in Embodiment 2 above. Figure 6 Corresponding. A first power module 3dd constituting the first inverter circuit 3a and the first power relay 5a, and a first power module 3d constituting the second inverter circuit 3b and the second power relay 5b are mounted on the inner wall surface of the bottom of the casing 1f. 2 power modules 3ee.

[0121] In Embodiment 3, only one power supply connector 40e is provided, and the +B line and the GND line of the battery 9 of the vehicle are connected to this one power supply connector 40e. were divided into two groups (not shown). Therefore, compared with Embodiment 1, 2, it is larger in size. In addition, the connector for a power supply has one housing, and the te...

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Abstract

In this electric power steering device, a constituent element of a control unit for controlling one of two sets of windings in a motor and a constituent element of a control unit for controlling the other set of the winding are arranged either in a point symmetry with respect to the axial center of an output shaft or in a line symmetry with respect to a virtual straight line orthogonal to the direction in which the output shaft extends.

Description

technical field [0001] This application relates to electric power steering devices. Background technique [0002] An electric power steering device in which an electric motor and a control unit for controlling the electric motor are integrated is known. As such an electric power steering device, there is an electric power steering device that includes an electric motor with built-in motor structural elements such as a stator and a rotor, and a control unit that controls the electric motor in a housing, and the electric motor and the control unit are separated by an output shaft of the electric motor. Arranged side by side in a stacked manner in the extending direction and integrated. [0003] Conventionally, in the electric power steering apparatus configured as described above, there are types in which the control unit is disposed on the opposite output side of the output shaft of the motor and types in which the control unit is disposed on the output side of the output sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K11/33H02K5/22H02K7/116
CPCH02K11/33B62D5/0406B62D5/0403H02K5/225H02K2213/06H02K16/04B60R16/03B62D5/046H02K3/28H02K3/50H02K2211/03
Inventor 市川崇敬藤本宪悟川口贵久瓜本贤太郎
Owner MITSUBISHI ELECTRIC CORP
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