JP2016181963A5

JP2016181963A5 -

Info

Publication number: JP2016181963A5
Application number: JP2015060028A
Authority: JP
Filing date: 2015-03-23
Publication date: 2018-01-11
Anticipated expiration: 2035-03-23

Description

本発明は、多系統モータ巻線を有するモータを駆動制御するモータ制御装置に関し、本発明の上記目的は、多系統モータ巻線を有するモータに駆動電流を供給する巻線系統毎のモータ駆動回路と、前記モータを駆動するための巻線系統単位の電流指令値を演算し、いずれかの系統の前記モータ巻線又は前記モータ駆動回路に故障が発生したら、正常である系統の前記電流指令値の特性を、正常時の前記電流指令値の総和と同等な特性を形成する第１特性に変更する第１変更を実施し、前記第１変更を実施した後、操舵トルクがないとき若しくはハンドルがセンター付近にあるとき又は車両が直進しているとき、最大出力は超えず前記最大出力になるまでは前記第１特性と同等な特性である第２特性に前記電流指令値の特性を変更する第２変更を実施して前記モータ駆動回路を制御する制御演算部とを備えることにより達成される。
本発明の上記目的は、前記電流指令値の特性はアシストマップで定義されることにより、或いは前記電流指令値の特性は、少なくとも操舵トルクに応じて変化する特性であることにより、或いは前記モータ巻線又は前記モータ駆動回路に故障が発生した系統は、故障が発生した時に遮断されることにより、より効果的に達成される。 The present invention relates to a motor control device for driving and controlling a motor having a multi-system motor winding. The object of the present invention is to provide a motor drive circuit for each winding system for supplying a drive current to a motor having a multi-system motor winding. And a current command value for each winding system for driving the motor, and if a failure occurs in the motor winding or the motor drive circuit of any system, the current command value of the normal system Is changed to a first characteristic that forms a characteristic equivalent to the sum of the current command values under normal conditions, and after performing the first change, there is no steering torque or the steering wheel When the vehicle is in the vicinity of the center or when the vehicle is traveling straight, the maximum output is not exceeded and the current command value characteristic is changed to a second characteristic that is equivalent to the first characteristic until the maximum output is reached. 2 changes It is achieved by providing a control arithmetic unit for controlling the motor driving circuit to implement.
The above object of the present invention, by the characteristics of the current command value is defined by the assist map, by one have the characteristics of the current command value is a characteristic that varies in response to at least the steering torque, or the A system in which a failure occurs in the motor winding or the motor drive circuit is more effectively achieved by being shut down when the failure occurs.

Claims

A motor drive circuit for each winding system for supplying a drive current to a motor having a multi-system motor winding;
A current command value for each winding system for driving the motor is calculated, and if a failure occurs in the motor winding or the motor drive circuit of any system, the characteristics of the current command value of the normal system Is changed to a first characteristic that forms a characteristic equivalent to the sum of the current command values under normal conditions, and after performing the first change, there is no steering torque or the steering wheel is near the center. When the vehicle is traveling straight or when the vehicle is traveling straight , the second output changes the characteristic of the current command value to the second characteristic that is equivalent to the first characteristic until the maximum output is reached without exceeding the maximum output. And a control arithmetic unit that controls the motor driving circuit.

The motor control device according to claim 1, wherein the characteristic of the current command value is defined by an assist map.

Characteristics of the current command value, the motor control device according to claim 1 or 2, which is a characteristic that varies in response to at least the steering torque.

The motor control device according to any one of claims 1 to 3 , wherein a system in which a failure has occurred in the motor winding or the motor drive circuit is shut off when the failure has occurred.

An electric power steering apparatus that is motor-driven and controlled by the motor control apparatus according to any one of claims 1 to 4 and that applies assist force to a steering system of a vehicle.

A vehicle equipped with the electric power steering device according to claim 5 .