MOTOR
To remove an offset of an output voltage of a magnetic sensor caused by an external magnetic field.SOLUTION: A motor includes a signal processing circuit including a first magnetic sensor for detecting a rotational position of a rotor, a second magnetic sensor located at a center of rotation of the...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To remove an offset of an output voltage of a magnetic sensor caused by an external magnetic field.SOLUTION: A motor includes a signal processing circuit including a first magnetic sensor for detecting a rotational position of a rotor, a second magnetic sensor located at a center of rotation of the rotor, a signal amplification unit for amplifying a difference between a first signal, which is a signal output from the first magnetic sensor and a second signal, which is a signal output from the second magnetic sensor, and a pulse signal generation unit for converting an output signal of the signal amplification unit into a pulse signal.SELECTED DRAWING: Figure 8
【課題】外部磁場によって生ずる磁気センサの出力電圧のオフセットを除去する。【解決手段】開示される実施形態に係る信号処理回路は、ロータの回転位置を検出する第１の磁気センサと、ロータの回転中心に配置される第２の磁気センサと、第１の磁気センサから出力される信号である第１信号と、第２の磁気センサから出力される信号である第２信号との差分を増幅する信号増幅部と、信号増幅部の出力信号をパルス信号に変換するパルス信号生成部と、を備えたモータを備える。【選択図】図８ |
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