Motors and inverters are increasingly being used in vehicles. As more vehicle components are being adopted, requirement for safety and installation space are increasing. Growing attention is being paid to the use of six-phase permanent magnet synchronous motors (PMSMs) and their parallel control by two inverters, because of their reduced size and enhanced safety. This paper proposes a pulsewidth modulation (PWM) control algorithm for a six-phase PMSM. In low-voltage vehicle components such as electric power steering, the current is usually acquired with resistors placed under the low-side switching devices. In the proposed control algorithm, the neutral voltage of the two inverters is shifted to either a lower or higher voltage within a certain range to allow for the signal conditioning time delay after the switching device turns on or off, and the time taken for the phase current to rise or settle. The paper proposes a novel PWM control algorithm that ensures that the on-time of the low-side switching devices satisfies the restriction on current sensing with resistors and reduces the current in the capacitor at the same time. The work contributes to reducing the current in a practical configuration involving low-voltage vehicle components.

中文翻译：

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六相 PMSM 的 PWM 控制算法：降低逆变器电容器中的电流和使用电阻器进行电流检测

电机和逆变器越来越多地用于车辆。随着越来越多的车辆部件被采用，对安全性和安装空间的要求也越来越高。六相永磁同步电机 (PMSM) 的使用及其通过两个逆变器的并联控制受到越来越多的关注，因为它们减小了尺寸并提高了安全性。本文提出了一种用于六相 PMSM 的脉宽调制 (PWM) 控制算法。在电动助力转向等低压车辆部件中，电流通常是通过放置在低侧开关器件下方的电阻器获得的。在所提出的控制算法中，两个逆变器的中性电压在一定范围内转移到较低或较高的电压，以允许在开关器件打开或关闭后的信号调节时间延迟，以及相电流上升或稳定所需的时间。本文提出了一种新颖的 PWM 控制算法，可确保低侧开关器件的导通时间满足电阻对电流检测的限制，同时降低电容器中的电流。这项工作有助于降低涉及低压车辆部件的实际配置中的电流。