RESOLVER SIGNAL ABNORMALITY DETECTING CIRCUIT

• Main Author: ARAI SHINICHI
• Format: Patent
• Language: English; Japanese
• Published: 09.06.2016
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

PROBLEM TO BE SOLVED: To provide a resolver signal abnormality detecting circuit capable of discriminating and detecting a short-circuit abnormality and a ground fault abnormality of a resolver signal.SOLUTION: A resolver signal abnormality detecting circuit comprises a first resistor 20and a second resistor 20mutually connected in series between a first terminal 11a and a second terminal 11b of an output winding 11 of a resolver 1, and an abnormality detecting circuit body 21 connected to a midpoint 20between the first resistor 20and the second resistor 20. The abnormality detecting circuit body 21 comprises a first comparator 210 which compares the potential of the midpoint 20with a ground fault detection threshold value 211a, a first integrator 212 which integrates the output of the first comparator 210 and outputs a ground fault abnormality detecting signal 212a when the integrated value exceeds a prescribed threshold value, a second comparator 213 which compares the potential of the midpoint 20with a short-circuit detection threshold value 214a, and a second integrator 215 which integrates the output of the second comparator 213 and outputs a short-circuit abnormality detecting signal 215a when the integrated value exceeds the prescribed threshold value.SELECTED DRAWING: Figure 1 【課題】レゾルバ信号の天絡異常及び地絡異常を判別して検出することができるようにする。【解決手段】レゾルバ信号異常検出回路は、レゾルバ１の出力巻線１１の第１及び第２端子１１ａ，１１ｂの間で互いに直列に接続された第１及び第２抵抗器２０１，２０２と、第１及び第２抵抗器２０１，２０２の中点２０１−２に接続された異常検出回路本体２１とを備えている。異常検出回路本体２１は、中点２０１−２の電位と地絡検出閾値２１１ａとを比較する第１コンパレータ２１０と、第１コンパレータ２１０の出力を積分して、積分値が所定の閾値を超えた際に地絡異常検出信号２１２ａを出力する第１積分器２１２と、中点２０１−２の電位と天絡検出閾値２１４ａとを比較する第２コンパレータ２１３と、第２コンパレータ２１３の出力を積分して、積分値が所定の閾値を超えた際に天絡異常検出信号２１５ａを出力する第２積分器２１５とを含む。【選択図】図１