MOTOR
To provide a motor which eliminates an offset of output voltage of a magnetic sensor in which the offset is generated by an external magnetic field.SOLUTION: The motor is provided with: a plurality of magnetic sensors which output a sine wave signal having a constant phase difference in order accord...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide a motor which eliminates an offset of output voltage of a magnetic sensor in which the offset is generated by an external magnetic field.SOLUTION: The motor is provided with: a plurality of magnetic sensors which output a sine wave signal having a constant phase difference in order according to rotation of a rotor; each output signal of the magnetic sensors; a signal amplification part which amplifies a difference from an average signal which is an average of the output signals of the magnetic sensors; and a pulse signal generating part which converts the output signal of the signal amplification part 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モータは、ロータの回転に応じて順に一定の位相差を有する正弦波信号を出力する複数の磁気センサと、複数の磁気センサの各々の出力信号と、複数の磁気センサの出力信号の平均である平均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、を備える。【選択図】図８ |
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