センサレス永久磁石同期モータのための正相逆相高周波電流相関を用いた離散時間搬送高周波電圧印加法

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  • Sensorless Vector Control of PMSM using Positive- and Negative-Phase High-Frequency Currents Correlation Signal by Discrete-Time Voltage Injection of PWM Carrier Frequency
  • センサレス エイキュウ ジシャク ドウキ モータ ノ タメ ノ セイソウ ギャクソウ コウシュウハ デンリュウ ソウカン オ モチイタ リサン ジカン ハンソウ コウシュウハ デンアツ インカホウ

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<p>This paper presents a new sensorless vector control method for permanent-magnet synchronous motors (PMSMs) that employs discrete-time high-frequency voltage injection. The frequency range of the injected voltage is almost the same as that of the pulse width modulation (PWM) carrier of the voltage command. This allows high-speed phase estimation and high-performance drive, and possibly low acoustic noise caused by the injected voltage. The current associated with the injected voltage, which has a frequency almost equal to the carrier frequency, must be analyzed in a discrete-time manner. This is because, a simple approximation of the continuous-time analysis of the high-frequency current cannot be applied in the range of the carrier frequency. Based on discrete-time analysis, this paper reconstructs the conventional rotor phase estimation methods using positive- and negative-phase high-frequency current correlation signals. The usefulness of the proposed method is verified through extensive experiments.</p>

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