Development of Independent 2 AC Motors Control System fed by a Five-Leg Inverter for Independent Four Wheels Drive of Electric Vehicle.

在本研究中，我们的工作目的是提出并开发一种由五腿逆变器馈电的独立2交流电机控制系统，用于电动汽车的独立四轮驱动。首先，提出并开发了由五腿逆变器（FLI）供电的两台三相永磁同步电动机（pmms）的独立矢量控制特性及其驱动系统。近年来，永磁同步电机在工业领域和交通系统中的应用越来越广泛。与直流电机和感应电机相比，具有重量轻、效率高的特点。永磁同步电机的最大特点是实现了高性能的位置和速度控制。独立的位置和速度控制验证了工厂自动化（FA）设备，如机床和电动汽车。如果利用FLI实现两台电机的独立位置和速度控制，那么在无双三相电压源逆变器的情况下，FA装置上使用的带式输送机不仅可以实现一维，而且可以实现二维。在本研究中，通过矢量控制验证了FLI馈入的两个永磁同步电机的位置和速度独立控制的实验结果。此外，还研究了两个永磁同步电机在一个电机转速控制和另一个电机位置控制条件下的独立特性。其次，提出并发展了由四腿逆变器（FLI）供电的两台三相异步电动机（IMs）的独立驱动特性。FLI是一个可以独立驱动两个三相交流电机的逆变器。逆变器由四个支腿和两个串联的电容器组成。两个电机的U相和V相分别连接在每个支路上，而两个电机的W相连接在两个精神电容器的中性点上。三相电压源逆变器（three-VSI）中的PWM技术不能直接应用于FLI，因为它只需要调制两相。然后，对双电容的中性点电位和逆变器输出电压进行了分析。其次，在FLI调制技术也显示。实验结果验证了两种与IM无关的驱动器的特性和分析结果的有效性。我们在IEEE IAS年会、IEEE能源转换大会和博览会以及多个国际会议上发表了许多研究成果，并在IEEE和IEEJ工业应用学报上发表了论文。少

In this research, the purpose of our work is to propose and develop the independent 2 AC motors control system fed by a Five-Leg Inverter for independent four wheels drive of electric vehicle.At first, the independent vector control characteristics and its drive system of two three-phase permanent magnet synchronous motors(PMSMs) fed by a five-leg inverter(FLI) was proposed and developed. Recently, the use of PMSM is more and more spreading in industrial field and transportation system. It has the features of saving-weight and high-efficiency compared with DC motor and induction motor. The maximum feature of the PMSMs is the realization of high performance position and speed control. The independent position and speed control validates for the factory automation(FA) apparatus as machine tool and electric vehicles. If the independent position and speed control of two motors with the FLI may be realized, the belt conveyer used at the FA apparatus will become possible not only one dimensi … More on but also two dimensions without double three-phase voltage source inverters. In this research, experimental results are verified for the independent position and speed control of two PMSMs fed by the FLI with the vector control. In addition, two PMSMs independent characteristics on condition that one motor operates at speed control and the other PMSM at position control also investigated. The next, the independent drive characteristics of two three-phase induction motors(IMs) fed by a four-leg inverter(FLI) was proposed and developed in this research. The FLI is a single inverter that can drive two three-phase AC motors independently. The inverter consists of four legs and two capacitors connected in a series. The U and V phases of both motors are connected in each leg respectively whereas the W phase of both motors is connected in the neutral point of two sprit capacitors. The PWM technique in three-phase voltage source inverter(three-VSI) is not directly applicable for the FLI because only two phases must be modulated. Then, the paper also analyzes about the neutral point potential of two-sprit capacitors and inverter output voltage. Next, modulation technique in the FLI is also shown. Experimental results demonstrate the characteristics of two IM independent drives and the validity of those analytic results. We presented many results of this research at the IEEE IAS Annual Conference, the IEEE Energy Conversion Congress & Expo, and several International Conferences, and also published the IEEE and the IEEJ Transactions on Industry Applications. Less