CONTROL SYSTEM FOR AC MOTOR
PROBLEM TO BE SOLVED: To provide a control system for AC motor, capable of suppressing an influence of electromagnetic noise in a resolver by suppressing generation of a cost increase.SOLUTION: A rotational angle position of an AC motor whose output is controlled by an inverter including a plurality...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a control system for AC motor, capable of suppressing an influence of electromagnetic noise in a resolver by suppressing generation of a cost increase.SOLUTION: A rotational angle position of an AC motor whose output is controlled by an inverter including a plurality of switching elements is detected by a resolver. A frequency of a carrier signal used for pulse width modulation control by an inverter is set to a setting value frset of an excitation signal frequency of the resolver to make a switching frequency of the inverter coincide with the excitation signal frequency of the resolver.SELECTED DRAWING: Figure 7
【課題】交流電動機の制御システムにおいて、コスト上昇を抑制してレゾルバにおける電磁ノイズの影響を低下させる。【解決手段】複数のスイッチング素子を含むインバータによって出力を制御される交流電動機の回転角度位置が、レゾルバによって検出される。インバータでのパルス幅変調制御に用いられるキャリア信号の周波数は、インバータのスイッチング周波数をレゾルバの励磁信号の周波数と一致させるために、レゾルバの励磁信号周波数の設定値ｆｒｓｅｔに設定される。【選択図】図７ |
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