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

本研究以五桥臂逆变器供电的两台独立交流电动机驱动系统为研究对象，首先研究了五桥臂逆变器供电的两台三相永磁同步电动机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运输系统中的应用越来越广泛。与直流电动机和感应电动机相比，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。如果能实现两台电机的独立位置和速度控制，将使FA装置上的带式输送机不再是一维的， ...更多信息 上，但也二维无双三相电压源逆变器。在本研究中，实验结果验证了独立的位置和速度控制的两个永磁同步电动机的FLI与矢量控制。此外，还研究了一台电机速度控制，另一台电机位置控制时两台永磁同步电机的独立特性。其次，本文提出并发展了四桥臂逆变器供电的两台三相感应电动机的独立驱动特性。FLI是一个单独的逆变器，可以独立驱动两个三相交流电机。逆变器由四个桥臂和两个串联电容组成。两个电动机的U相和V相分别连接在每个腿中，而两个电动机的W相连接在两个sprit电容器的中性点中。三相电压型逆变器的PWM技术不能直接应用于FLI，因为只有两相需要调制。然后，本文还对双电容器中点电位和逆变器输出电压进行了分析。接下来，还示出了FLI中的调制技术。实验结果验证了两种IM独立驱动器的特性和分析结果的正确性。我们在IEEE IAS年度会议，IEEE能源转换大会和博览会以及一些国际会议上展示了这项研究的许多成果，并发表了IEEE和IEEJ行业应用交易。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