KR980006783A

KR980006783A - Low cost phase locked motor control method and structure

Info

Publication number: KR980006783A
Application number: KR1019960020897A
Authority: KR
Inventors: 이. 힐러 윌리엄
Original assignee: 이. 힐러 윌리엄; 텍사스 인스트루먼츠 인코포레이티드
Priority date: 1996-05-13
Filing date: 1996-06-12
Publication date: 1998-03-30
Also published as: WO1997043456A1

Abstract

모터 제어 스시템은 입력 타이밍 신호에 대해 모터를 위상 고정하는 저가의 방법을 제공한다. 타이머 회로들(502, 506)은 타이밍 신호의 기간 및 타이밍 신호와 모터 회전자 상이의 상대적 위상을 측정한다. 주파수 커맨드 발생기 회로(520)는 타이밍 신호의 기간 및 모터 회전자와 비교된 타이밍 신호의 상대적 위상을 기초로한 모터 속도 커맨드를 출력한다. 모터 속도 커맨드의 입력 타이밍 신호에 따라 모터 회전자 속도를 동기로 구동하는 모터 구동기 회로의 출력을 제어한다. 회전자 속도는 입력 타이밍 신호와 모터 회전자 사이의 상대적 위상을 조정하기 위해 점차로 변경된다. 이것은 타이밍 신호와 모터 회전자 사이의 선정된 위상 관계를 유지하는데 사용된 적은 주파수 고정 에러를 야기한다.The motor control system provides a low cost method of phase locking the motor with respect to the input timing signal. Timer circuits 502 and 506 measure the duration of the timing signal and the relative phase of the timing signal and the motor rotor. The frequency command generator circuit 520 outputs a motor speed command based on the duration of the timing signal and the relative phase of the timing signal compared to the motor rotor. The output of the motor driver circuit for synchronously driving the motor rotor speed is controlled in accordance with the input timing signal of the motor speed command. The rotor speed is gradually changed to adjust the relative phase between the input timing signal and the motor rotor. This causes a small frequency lock error used to maintain the predetermined phase relationship between the timing signal and the motor rotor.

Description

Low cost phase locked motor control method and structure

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제4도는 제1도의 투영 디스플레이 시스템의 모터 제어 회로의 한 실시예의 블럭도.4 is a block diagram of one embodiment of a motor control circuit of the projection display system of FIG.

제5도는 제4도의 모터 제어 회로의 마이크로컨트롤러의 한 실시예의 블럭도.5 is a block diagram of one embodiment of a microcontroller of the motor control circuit of FIG.

Claims

A motor control system for loosely phase locking a motor to a timing signal, the motor control system comprising: a first timer for receiving a timing signal, measuring a duration of the timing signal, and outputting a frequency signal representing the measured duration of the timing signal Circuit; Receiving the timing signal and an index signal from the motor indicating when the motor rotor reaches a predetermined point, measuring a relative delay between the timing signal and the index signal, and receiving a phase error signal indicating the relative delay. A second timer circuit for outputting; An abacus command generator which receives the frequency signal and the phase error signal and outputs a frequency command signal comprising a frequency component determined by the frequency signal and a phase component determined by the phase error signal; And a motor driver circuit for receiving the frequency command and driving the motor at a speed determined by the frequency command, wherein the frequency component determines a base rate at which the motor is driven and the phase component is dependent upon the timing signal. And determine an offset relative to the base rate to adjust the phase of the motor rotor relative to the base rate.

CLAIMS 1. A method of phase locking a motor rotor with respect to a timing signal, comprising: measuring a duration of the timing signal; Measuring the phase of the motor rotor with respect to the timing signal; Generating a motor speed signal based on the measured period of the timing signal and an offset by an error signal based on the measured phase; And driving the motor at a speed determined by the motor speed signal, wherein the speed of the motor is tightly controlled by the measured period of the timing signal and an offset by the error signal, wherein the error And a signal offset slowly adjusts the phase of the motor relative to the timing signal.

※ Note: The disclosure is based on the initial application.