永磁同步电机无传感器控制的新型双载波PWM调制

Hossein Hosseinyar, S. Karimi, F. Tahami
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引用次数: 0

摘要

同步电动机的低速控制是近年来研究的热点问题。由于反电动势电压在低速下的幅值较低,单纯依靠感应电压进行位置估计是不合适的。本文提出了一种新的双载波PWM调制方法,该方法将两个载波频率分别用于逆变器的两个支路。该方法解决了对大功率处理器的需求,降低了电驱动系统的成本。采用非线性控制系统和自动增益控制,确保无传感器控制电机的大范围速度。
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A Novel Double Carrier PWM Modulation for Sensorless Control of Permanent Magnet Synchronous Motors
Control of Synchronous Motors at low speed has been the topic of several studies for the last years. Due to the lower amplitude of Back-EMF voltage in lower speed, it is inappropriate to merely rely on induced voltages for position estimation. In this paper, a new double carrier PWM modulation is presented in which two carrier frequencies are utilized for two legs of the inverter. This proposed method rectify the need of powerful processors which decreases the cost of the electric drive system. Employing a non-linear control system and an automatic gain control, ensures the sensorless control of the motor for a wide range of speed.
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