永久磁石同期モータセンサレス駆動のための新フーリエ形位相推定法

摘要

This paper proposes a new Fourier-type phase estimation method (FPEM) for estimating the rotor phase in the sensorless drives of salient-pole permanent-magnet synchronous motors. The method involves the use of a stator current induced by high-frequency voltage injection. The proposed FPEM has the following characteristics: 1) it is versatile, I.e., it can be applied to almost all voltage injections, 2) it does not require band-pass filters that extract the high-frequency component from the stator current, 3) it could have the potential to enhance the positive correlation between the rotor phase and high-frequency current, 4) it does not require redesigning of the integrated PLL when the amplitude and/or frequency of the injected high-frequency voltage is changed. The usefulness of the proposed method is verified through extensive experiments.%回転子に永久磁石を有する同期モータである永久磁石同 期モータ（permanent－magnet synChronous motor，PMSM） のためのセンサレスベクトル制御法における重要課題の一 つは，低速城での高トルク発生と広範囲駆動とにある。本 課題の現実的な解決方法として，PMSMの高周波電流に対 する突極特性を利用した高周波電圧印加法（広義）が種々 提案され，この実用化・商用化が電気自動車，ハイブリッ ド車等への応用を中心に進められている。