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Electronic control device for electric power steering apparatus

An electronic control device, electric power steering technology, applied in the direction of automatic steering control components, power steering mechanism, AC motor control, etc., can solve the problems of not considering the inrush current, destroying the semiconductor relay MOS type FET, etc., and achieve low-cost structure, Effect of Surge Voltage Suppression

Inactive Publication Date: 2014-08-20
HONDA ELESYS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the inrush current generated when the relay is turned on is not considered, a closed circuit may be formed between the vehicle power supply such as a battery and the electrolytic capacitor, thereby destroying the MOS type FET constituting the semiconductor relay.

Method used

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  • Electronic control device for electric power steering apparatus
  • Electronic control device for electric power steering apparatus
  • Electronic control device for electric power steering apparatus

Examples

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Embodiment Construction

[0030] Hereinafter, embodiments of the present invention will be described in detail.

[0031] (Structure of Embodiment)

[0032] figure 1 A schematic configuration of an EPS 10 equipped with an electronic control device for electric power steering (hereinafter referred to as ECU 50 for EPS) according to the present embodiment is schematically shown. The EPS 10 is composed of a steering system 20 from the steering wheel 21 of the vehicle to steering wheels (for example, front wheels) 31 , 31 , and an assist torque mechanism 40 that assists the steering system 20 . torque.

[0033] The steering system 20 is composed of a steering wheel 21 , a pinion shaft 24 , a rack shaft 26 , and left and right steering wheels 31 , 31 . The pinion shaft 24 is connected to the steering wheel 21 via a steering shaft 22 and free shaft joints 23 , 23 . , the rack shaft 26 is connected to the pinion shaft 24 via a rack and pinion mechanism 25, and the steering wheels 31, 31 are connected to th...

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PUM

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Abstract

An electronic control device for an electric power steering apparatus includes a power relay connected between a positive electrode of an on-vehicle power supply and a first line connected to the positive electrode of the on-vehicle power supply, a capacitive element connected between the first line and a second line connected to a negative electrode of the on-vehicle power supply, and a control section configured to switch ON and OFF states of the power relay to thereby perform pre-charging of the capacitive element.

Description

technical field [0001] The present invention relates to an electronic control device for electric power steering that assists, for example, steering torque generated by a steering wheel with assist torque generated by a brushless DC motor. Background technique [0002] Brushless DC motors are often used in various devices such as vehicles. In recent years, electric power steering (EPS: Electric Power Steering) has been developed in order to reduce the load on the operation of vehicles. In the EPS, the steering torque generated by the steering wheel is assisted by the assist torque generated by the brushless DC motor. [0003] Image 6 The internal structure of an electronic control unit 200 (ECU: Electric Control Unit: Electronic Control Unit) which is a computer of a conventional EPS is shown. Hereinafter, this ECS is referred to as ECU 200 for EPS. according to Image 6 The ECU 200 for EPS is composed of a power board 202 and a control board 203. The power board 202 is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D6/00H02P27/08H02M1/32
CPCB62D5/0481B62D5/046
Inventor 原田一树
Owner HONDA ELESYS CO LTD
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