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Electric motor controller and electric motor controller for vehicle steering apparatus

A technology for a control device and a steering device, which is applied to electric steering mechanism, motor generator control, AC motor control, etc., and can solve problems such as large number of wirings, high price of solvers, and reduction in miniaturization.

Inactive Publication Date: 2014-07-02
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the resolver is expensive, the number of wiring is large, and the installation space is large
Therefore, there is a problem of hindering cost reduction and miniaturization of devices having brushless motors

Method used

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  • Electric motor controller and electric motor controller for vehicle steering apparatus
  • Electric motor controller and electric motor controller for vehicle steering apparatus
  • Electric motor controller and electric motor controller for vehicle steering apparatus

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0021] figure 1 It is a block diagram for explaining the electrical configuration of an electric power steering device (an example of a vehicle steering device) to which the motor control device according to the first embodiment of the present invention is applied. This electric power steering apparatus includes: a torque sensor 1 that detects a steering torque T applied to a steering wheel 10 that is a steering member for steering a vehicle; a brushless motor); a steering angle sensor 4 that detects a steering angle that is the rotation angle of the steering wheel 10; a motor control device 5 that drives and controls the motor 3; and a vehicle speed sensor 6 that detects the speed of a vehicle on which the electric power steering device is mounted.

[0022] The motor control device 5 drives the motor 3 based on the steering torque detected by the torque sens...

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PUM

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Abstract

An electric motor controller controls an electric motor including a rotor and a stator that faces the rotor. A current drive unit drives the motor based on an axis current value in a rotating coordinate system that rotates in accordance with a control angle that is a rotational angle used in a control. An addition angle calculation unit calculates an addition angle that is added to the control angle. A control angle calculation unit obtains a current value of the control angle by adding the addition angle to an immediately preceding value of the control angle in each predetermined calculation cycle. A torque detection unit detects a torque that is applied to a motor driven member except a motor torque. A changing unit changes a parameter for controlling the electric motor in accordance with a detected torque that is detected by the torque detection unit. A suspending unit suspends the operation of the changing unit, until an absolute value of the detected torque becomes equal to or smaller than a predetermined value.

Description

[0001] The entire contents of Japanese Patent Application No. 2009-019976 filed on January 30, 2009 are incorporated herein by reference. technical field [0002] The present invention relates to a motor control device for driving a brushless motor and a motor control device for a vehicle steering device. Background technique [0003] A brushless motor can be used, for example, as a driving source of a steering device for a vehicle. An example of a steering device for a vehicle is an electric power steering device. A motor control device for driving and controlling a brushless motor is generally configured to control the supply of motor current based on the output of a rotation angle sensor for detecting the rotation angle of a rotor. As the rotation angle sensor, a resolver that outputs a sine wave signal and a cosine wave signal corresponding to the rotor rotation angle (electrical angle) is generally used. However, the resolver is expensive, has a large number of wires,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/08H02P6/18B62D5/04H02P6/06H02P6/182H02P6/28H02P21/00H02P21/14H02P21/18H02P21/22H02P21/24H02P21/28H02P23/14H02P23/24H02P27/04H02P27/08
CPCB62D5/0463B62D5/046H02P21/02
Inventor 篠田智史冷水由信
Owner JTEKT CORP
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