Research on a Position-Sensorless IPM Motor Drive System Using Position Estimation Based on Magnetic Saliency

本研究旨在建立一个无位置感测器的IPM马达驱动系统（3.7 kW），并应用研究者所提出的位置估测法来研究该驱动系统的特性。首先，我们设计并建立了一个3.7 kW内置式永磁同步马达（IPM马达）的实验驱动器。研制了谐波电流检测电路、PWM信号发生器以及与数字信号处理器（DSP）的接口电路。该电路的特点是一个复杂的配置，可以自动获取涟漪电流产生的电压源PWM逆变器，以估计IPM电机的转子位置。采集系统是在可编程逻辑器件（PLD）实现的。理论和实验表明，在本文提出的PWM方法中引入加权系数，可使逆变器的输出电压提高15%，而基于 ...更多信息 利用MATLAB/Simulink进行仿真，研究了有无电流小环对调速系统控制性能的影响。结果表明，即使将d轴电压基准设置为零，d轴电机电流也不能被调节为零，并且将电流小环添加到控制系统中不仅改善了电流响应，而且改善了位置和速度控制系统的稳定性。此外，本文还利用MATLAB/Simulink开发了一种能够准确、高效地对驱动系统进行仿真的方法。该仿真方法的特点是假设数字控制PWM逆变器对应于采样时间可变的离散时间系统。五种情况下的仿真验证了该方法的正确性和有效性。仿真方法可以消除电流和电压误差，并且该方法的执行时间比传统方法快约100倍。少

This research aims to build up a position-sensorless IPM motor drive system (3.7 kW) applying a position estimation proposed by the head investigator, and to study characteristic of the drive system.First of all, we have design and build up an experimental drive using a 3.7-kW interior permanent magnet synchronous motor (IPM motor). A harmonic current detection circuit, a PWM signal generator, and an interface circuit connecting a digital signal processor (DSP) have been developed. The circuits are characterized by a sophisticated configuration which can automatically acquire ripple currents generated by a voltage-source PWM inverter to estimate the rotor position of the IPM motor. The acquisition system is implemented in programmable logic devices (PLDs). Moreover, it is shown theoretically and experimentally that introduction of weighting coefficient into the PWM method proposed by the head investigator can enlarge the output voltage of the inverter by 15%.On the other hand, based on … More simulations using MATLAB/Simulink, it has been investigated that the control performance of the drive system is different whether the control system has current minor loops or not. As a result, it is shown that the d-axis motor current can not be adjusted to zero even if the d-axis voltage reference is set to zero, and that addition of the current minor loops to the control system improves not only current response but also stability of the position and speed control systems. In addition, a simulation method, which can simulate the drive system accurately and efficiently, is developed using the MATLAB/Simulink. The simulation method is characterized by assumption that a digital-controlled PWM inverter corresponds to discrete time systems with variable sampling time. Simulations in five conditions have confirmed validity and effectiveness of the method. The simulation method makes it possible to eliminate current and voltage errors, and execution time in the method is about 100 times faster than that of the conventional method. Less