KR970055199A - Encoder signal error detection circuit of brushless servo motor and its method - Google Patents

Encoder signal error detection circuit of brushless servo motor and its method Download PDF

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Publication number
KR970055199A
KR970055199A KR1019950069232A KR19950069232A KR970055199A KR 970055199 A KR970055199 A KR 970055199A KR 1019950069232 A KR1019950069232 A KR 1019950069232A KR 19950069232 A KR19950069232 A KR 19950069232A KR 970055199 A KR970055199 A KR 970055199A
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South Korea
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encoder
phase
output
signal
flops
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KR1019950069232A
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Korean (ko)
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조유환
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석진철
대우중공업 주식회사
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Priority to KR1019950069232A priority Critical patent/KR970055199A/en
Publication of KR970055199A publication Critical patent/KR970055199A/en

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Abstract

본 발명은 무브러쉬 서보 모터의 엔코더에서 출력되는 3상신호와 2상신호와의 관계로부터 상기 엔코더 각신호선의 단선 및 무브러쉬 서보 모터의 1회전당 출력 펄스수의 이상을 함께 검출하는 무브러쉬 서보 모터의 엔코더 신호 이상 검출회로 및 그 방법에 관한 것으로서, 무브러쉬 서보 모터의 엔코더에서 출력되는 3상신호의 전기각 60°구간에 입력된 2상신호의 펄스수를 계산하여 그 펄스수로 상기 엔코더의 각 출력신호 이상 유.무와 상기 출력신호들의 미스 매칭(miss-matching)에 따른 이상 유.무를 동시에 겸출할 수 있기 때문에 각종 에러 발생을 판단하여 그에 따른 신속한 조치를 취할 수 있는 효과가 있다.The present invention provides a brushless servo that simultaneously detects disconnection of each signal line of the encoder and an abnormal number of output pulses per revolution of the brushless servo motor from a relationship between a three-phase signal and a two-phase signal output from an encoder of a brushless servo motor. The present invention relates to an encoder signal abnormality detection circuit of a motor and a method thereof, wherein the number of pulses of a two-phase signal inputted at an electrical angle of 60 ° of a three-phase signal output from an encoder of a brushless servo motor is calculated, and the encoder uses the number of pulses. Since it is possible to simultaneously combine the presence / absence of each output signal and the presence / absence of miss-matching of the output signals, it is possible to determine various types of errors and take prompt action accordingly.

Description

무브러쉬 서보 모터의 엔코더 신호 이상 검출회로 및 그 방법Encoder signal error detection circuit of brushless servo motor and its method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 의한 무브러쉬 서보 모터의 엔코더 신호 이상 검출회로의 구성을 나타내는 블록도.2 is a block diagram showing the configuration of an encoder signal abnormality detection circuit of a brushless servomotor according to the present invention.

제3도는 제2도에 도시된 전기각 60°검출부의 구성을 나타내는 회로도.3 is a circuit diagram showing the configuration of the electrical angle 60 ° detection unit shown in FIG.

제4도는 본 발명에 의한 전기각 60°구간마다 실행되는 인터럽트 루틴의 흐름도이다.4 is a flowchart of an interrupt routine that is executed at every 60 ° electric section according to the present invention.

Claims (3)

엔코더(2)에서 출력되는 3상신호(U.V.W상)의 전기각 60°구간마다 펄스를 출력하는 전기각 60°검출부(3)와; 상기 엔코더(2)에서 출력되는 2상신호(A,B)상의 주파수를 배로 높여 출력하는 4차배기(4); 상기 4체배기(4)의 출력을 계수하고, 상기 전기각 60°검출부(3)의 출력 펄스를 래치신호로 입력받는 가·감산 계수기(5); 및 상기 전기각 60°검출부(3)로부터 펄스가 입력될 때마다 상기 가·감산 계수기(5)의 계수값을 읽어들여 상기 3상 신호(U.V.W상)의 전기각 60°구간 동안에 입력된 상기 2상신호(A,B상)의 펄스수를 계산한 다음 상기 엔코더(2)의 출력신호 이상을 검출하는 마이컴(6)으로 구성함을 특징으로 하는 무브러쉬 서보 모터의 엔코더 신호 이상 검출회로.An electrical angle 60 ° detection unit 3 for outputting a pulse every 60 degrees section of the three-phase signal (U.V.W phase) output from the encoder 2; A quaternary exhaust (4) for doubling the frequency of the two-phase signals (A, B) output from the encoder (2) and outputting them; An addition / subtraction counter (5) for counting the output of the quadruple multiplier (4) and receiving an output pulse of the electric angle 60 ° detection unit (3) as a latch signal; And reading the count value of the addition / subtraction counter 5 each time a pulse is input from the electric angle 60 ° detection unit 3, and inputting the two phases during the electric angle 60 ° period of the three-phase signal (UVW phase). An encoder signal abnormality detection circuit of a brushless servo motor, characterized in that it comprises a microcomputer (6) which calculates the number of pulses of the phase signals (A, B phase) and then detects an abnormal output signal of the encoder (2). 제1항에 있어서, 상기 전기각 60°검출부(3)는, 3상신호(U,V,W상)가 각각 입력되는 제1,2,3D풀립플롭(3a,3b,3c)과; 상기 제1,2,3D 플립플롭(3a,3b,3c)의 출력이 각각 입력되는 제4,5,6D플롭플롭(3d,3e,3f)과; 상기 제1,4D플립플롭(3a,3d), 제2,5D플립플롭(3b, 3e)및 제3,6D플립플롭(3c, 3f)의 출력을 각각 배타적 논리합 연산하여 출력하는 제1,2,3X-OR 연산기(3g,3h,3i); 및 상기 제1,2,3X-OR 연산기(3g,3h,3i)의 출력을 논리합 연산하여 상기 3상 신호(U,V,W상)의 전기각 60°구간마다 펄스를 출력하는 논리합 연산기(3j)로 구성함을 특징으로 하는 무브러쉬 서보모터의 엔코더 신호 이상 검출회로.2. The electric angle detecting unit (3) of claim 1, further comprising: first, second and third 3D flip flops (3a, 3b, 3c) to which three-phase signals (U, V, and W phases) are input; Fourth, fifth and sixth flop flops 3d, 3e, and 3f to which the outputs of the first, second, and third 3D flip-flops 3a, 3b, and 3c are respectively input; First and second outputting the outputs of the first and the 4D flip-flops 3a and 3d, the second and the 5D flip-flops 3b and 3e and the outputs of the third and 6D flip-flops 3c and 3f, respectively. , 3X-OR operator (3g, 3h, 3i); And an OR operation for performing an OR operation on the outputs of the first, second, and third X-OR calculators 3g, 3h, and 3i to output pulses at every 60 ° electric angle of the three-phase signals U, V, and W phases. 3j) encoder signal abnormality detection circuit of a brushless servomotor. 엔코더(2)에서 출력되는 3상신호(U,V,W상)의 전기각 60°구간동안 래치된 2상신호(A,B상)의 계수값을 읽어들이는 단계와; 상기에서 읽어들인 현재의 계수갑솨 이전의 계수값과의 차이로부터 상기 전기각 60°구간동안 입력된 상기 2상신호(A,B상)의 펄스수를 계산하는 단계; 상기 이전의 계수값에 현재의 계수값을 치환하는 단계; 및 상기에서 계산된 펄스수가 정상인지를 판단하여 상기 엔코더(2)의 출력신호 이상 유·무를 검출하는 단계로 이루어지는 것을 특징으로 하는 무브러쉬 서보 모터의 엔코더 신호 이상 검출방법.Reading coefficient values of the two-phase signals (A, B phase) latched during the electrical angle of 60 degrees of the three-phase signals (U, V, W phase) output from the encoder (2); Calculating the number of pulses of the two-phase signals (A, B phases) input during the electrical angle of 60 ° from the difference with the previous count value read from the current counting box; Replacing a current count value with the previous count value; And detecting the presence or absence of an abnormality in the output signal of the encoder (2) by judging whether the number of pulses calculated above is normal and detecting the abnormality of the encoder signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950069232A 1995-12-30 1995-12-30 Encoder signal error detection circuit of brushless servo motor and its method KR970055199A (en)

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KR1019950069232A KR970055199A (en) 1995-12-30 1995-12-30 Encoder signal error detection circuit of brushless servo motor and its method

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