KR940018282A - 차량용전동식 파워스티어링장치 - Google Patents

차량용전동식 파워스티어링장치 Download PDF

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Publication number
KR940018282A
KR940018282A KR1019940001390A KR19940001390A KR940018282A KR 940018282 A KR940018282 A KR 940018282A KR 1019940001390 A KR1019940001390 A KR 1019940001390A KR 19940001390 A KR19940001390 A KR 19940001390A KR 940018282 A KR940018282 A KR 940018282A
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South Korea
Prior art keywords
steering wheel
motor
control amount
steering
electric power
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KR1019940001390A
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English (en)
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KR0119574B1 (ko
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순이치 와다
카즈히사 니시노
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기타오카 다카시
미쓰비시덴키 가부시키가이샤
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Publication of KR940018282A publication Critical patent/KR940018282A/ko
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Publication of KR0119574B1 publication Critical patent/KR0119574B1/ko

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D5/00Power-assisted or power-driven steering
    • B62D5/04Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0457Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
    • B62D5/046Controlling the motor
    • B62D5/0466Controlling the motor for returning the steering wheel to neutral position

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Power Steering Mechanism (AREA)

Abstract

운전자가 차량의 핸들을 조작할때 보조하는 전동식 파워스티어링장치에는 그 핸들이 중심위치로 복귀시키는 상태에 있는지의 여부를 결정하는 핸들복귀상태 결정수단과, 모터의 제어량에 의한 각 구동모드에 대응되는 제어량을 발생하여 그 핸들의 복귀상태에 대한 결정결과에 따라 제어량 중 하나를 선택하는 제어량 발생 및 선택수단과, 그 제어량을 PWM부하율로 각각 변환시키는 변환수단을 포함한다. 정상적인 스티어링작동에 있어서, 그 모터를 작공하는 스위칭소자는 제 1 구동모드에 대응되는 PWM부하율로 구동함과 동시에 그 핸들이 중심위치로 복귀할때, 그 스위칭소자는 제 2 구동모드에 대응되는 PWM부하유로 구동시킨다.
스무스한(smooth) 스티어링 토크제어를 실현시켜 그 핸들복귀 특성을 향상시킨다.

Description

차량용전동식 파워스티어링장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1 도는 이 발명의 실시예 1 에 의한 전동식 파워스티어링장치의 배치를 나타낸 블록도, 제 5 도는 종래의 전동식 파워스티어링장치의 개략적인 회로구성을 나타낸 블록도.

Claims (6)

  1. 핸들의 스티어링토크(steering torque)를 검출하는 토크센서(torque sensor)와, 차량의 속도를 검출하는 차량속도센서와, 핸들의 조작을 보조하는 모터와, 정역방향중 한 방향으로 선택회전하도록 하는 모터와 함께 브리지회로의 형상으로 접속된 두쌍의 스위칭소자와, 그 모터를 통하여 흐르는 전류를 검출하는 모터전류검출수단과, 그 스티어링토크, 차량속도 및 모터전류에 의해 그 스위칭소자를 구동하는 신호처리유닛(signal processing unit)을 구성하는 차량의 전동식파워 스티어링장치에 있어서, 위 신호처리 유닛에는 그 차량의 핸들이 중심위치로 복귀되도록 하는 복귀상태에 그 핸들이 있는지의 여부를 결정하는 핸들복귀 결정수단과, 그 스티어링 토크와 차량속도에 의해 모터전류의 목표전류치를 연산하여 결정하는 목표전류치 연산수단과, 그 모터전류와 목표전류치의 편차에 의해 모터의 제어량을 연산하여 결정하는 제어량 연산수단과, 그 제어량에 의해 제1 및 제 2 구동모드 각각에 대응되는 제1 및 제 2 제어량을 발생하여 그 핸들의 복귀상태에 대한 결정결과에 따라 제1 및 제 2 제어량 중 하나를 선택하는 선택수단과, 위 스위치소자에 대한 각각의 제1 및 제2PWM부하율로 제1 및 제 2 제어량을 변환시키는 변환수단과, 제1 또는 제2PWM부하율에 의해 스위칭소자를 구동하는 구동회로를 포함하며; 그 선택수단은 그 핸들이 복쉬상태에 있지 않음을 결정하는 제 1 구동모드에 대응되는 제 1 제어량을 발생함과 동시에 그 핸들이 복귀상태에 있음을 결정하는 제 2 구동모드에 대응되는 제 2 제어량을 발생하며; 그 구동회로는 제1PWM부하율에 응답함으로써 전도상태에서 각쌍중 스위칭소자 하나를 일정하게 유지함과 동시에 각 쌍중 스위칭소자 다른하나를 on 및 off로 하고, 그 구동회로가 제2PMW부하율에 응답함으로써 각쌍의 위 스위칭소자 양자를 제2PWM부하율로 on 및 off로 함을 특징으로하는 위 차량용 전동식 파워스티어링장치.
  2. 제 1 항에 있어서, 그 변환수단에는 그 구동모드가 제1 또는 제 2 구동모드로 변환될때 제1 및 제2PWM부하율 사이의 편차를 정정하는 정정수단을 포함함을 특징으로하는 위 차량용 전동식 파워스티어링장치.
  3. 제 1 항에 있어서, 그 핸들복귀 결정수단은 그 모터전류와 목표전류치의 편차에 의한 핸들의 상태를 추정하여 그 결정의 결과로서 그 핸들의 추정상태를 출력함을 특징으로하는 위 차량용 전동식 파워스티어링장치.
  4. 제 3 항에 있어서, 그 변환수단에는 제1 및 제 2 구동모드사이에서 그 구동모드가 변환할때 제1 및 제2PWM부하율 사이의 편차를 정정하는 정정수단을 포함함을 특징으로하는 위 차량용 전동식 파워스티어링장치.
  5. 제 3 항에 있어서, 그 핸들복귀 결정수단은 그 모터전류가 소정치에 의해 그 목표전류치를 초과할때 그 핸들이 복귀상태에 있음을 추정함을 특징으로 하는 위 차량용 전동식 파워스티어링장치.
  6. 제 5 항에 있어서, 그 변환수단에는 제1 및 제 2 구동모드사이에서 그 구동모드가 변환할때 제1 및 제2PWM부하율 사이의 편차를 정정하는 정정수단을 포함함을 특징으로하는 위 차량용 전동식 파워스티어링장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940001390A 1993-01-27 1994-01-26 차량용 전동식 파워스티어링장치 KR0119574B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP93-11799 1993-01-27
JP5011799A JP2857555B2 (ja) 1993-01-27 1993-01-27 電動式パワーステアリング装置

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KR940018282A true KR940018282A (ko) 1994-08-16
KR0119574B1 KR0119574B1 (ko) 1997-10-22

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US (1) US5404960A (ko)
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KR (1) KR0119574B1 (ko)
DE (1) DE4402423B4 (ko)
FR (1) FR2701916B1 (ko)

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KR100371036B1 (ko) * 1997-12-13 2003-03-26 주식회사 만도 전동반력식파워스티어링보조장치
KR100695425B1 (ko) * 2003-02-11 2007-03-15 주식회사 만도 전자제어 파워 스티어링 시스템에서의 복원제어방법

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US5404960A (en) 1995-04-11
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DE4402423A1 (de) 1994-07-28
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