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标题：驱动方式对永磁伺服电机性能的影响研究 |
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作者：邱洪波，陈永信，段 强，等 |
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| 2016年第4期 访问次数：254次 |
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摘要：由于永磁伺服电机功率密度大、功率因数高、体积小、重量轻、形状尺寸灵活多样等优点得到广泛的应用。通过驱动控制器供电的永磁伺服电机，根据驱动控制器供电电流的波形，可以将永磁伺服电机分为无刷直流电机和正弦波永磁同步电机。本文以一台10 kW、2000 r/min的永磁伺服电机为例，首先对永磁伺服电机驱动方式及触发原理进行分析，揭示电机控制理论的机理。其次，对不同驱动方式下电机的转矩进行分析，对比研究不同驱动方式下，电机的转矩波动及过载能力。再次，通过有限元计算对电机电流、损耗进行分析，揭示不同驱动方式对电机损耗影响的机理。根据永磁伺服电机在不同驱动方式下转矩、过载能力、电流及损耗的变化，判定各驱动方式的优势，为永磁电机应用场合的选择提供参考。最后，搭建样机实验平台，通过驱动控制器对永磁伺服电机进行实验，并对比分析实验结果与仿真结果，得出不同驱动方式对电机性能的影响的利弊。
关键词：无刷直流电机；永磁同步电机；驱动方式；转矩脉动；损耗
Abstract: The permanent magnet servo motors (PMSM) with advantages of high power density, high power factor, small volume, light weight and flexible shape are used widely. According to the current waveform of driving controller, the permanent magnet servo motors can be divided into brushless DC motor and the sine wave permanent magnet synchronous motor. In this paper, taking a 10 kW，2000 r/min permanent magnet servo motor as an example, the driving model and the trigger principle of the permanent magnet servo motor were analyzed, and the mechanism of motor control theory was revealed. Then the torque of the motor with different driving models was analyzed. The motor torque ripple and the overload ability were compared respectively. Further then, the current and loss of motors were calculated by the finite element method, and the mechanism of loss variation of the motor with different driving models was revealed. Based on the current waveform, torque, overload ability and loss of motor, the advantages of driving model were determined to provide reference for the choice of motor application. Finally, the testing platform was built and the permanent magnet servo motor driven by driving controller was tested. Compared with the testing results and simulated results, the advantages of different driving models could be obtained.
Key words: BLDC; PMSM; driving controller; torque ripple; loss
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