PWM Inverter with Voltage Booster with Regenerating Capability Aug mented by Double-Layer Capacitor for Driving Permanent-Magnet Synchronous Motor.

提出了一种利用双层电容增强再生能力的内嵌式永磁同步电机驱动系统。电机由带升压器的PWM逆变器驱动。电压升压器用于控制高速区域直流链路电压，以提高系统效率。此外，双层电容器作为存储元件与带升压器的PWM逆变器相结合，以获得再生运行的效率。在该系统中，通常情况下，再生能量不直接返回到电池中，而是存储在双层电容器中，用于下一次运动动作，以抑制对电池的过大的再生电流，当再生能量大于一定值时，再生能量返回到电池中。电池的充电电流被控制在一个恒定的值，以延长电池的寿命。通过仿真和实验研究了1.5kW IPM电机系统的暂态和稳态特性。双层电容器参数为115V和207F。将仿真结果与实验结果进行比较，验证了仿真结果的有效性。此外，仿真和实验结果都证实了系统在两种再生模式下都能正常工作。所提出的系统可以有效地回收再生能量，并将有助于延长电池的使用寿命。

An interior permanent magnet(IPM) synchronous motor drive system which has regenerating capability augmented by double-layer capacitors was proposed. The motor is driven by a PWM inverter with voltage booster. The voltage booster is used to control the dc link voltage in high speed region to improve the system efficiency. Furthermore, the double-layer capacitor as a storage element is combined with the PWM inverter with voltage booster to gain the efficiency for the regenerating operation. In this system, normally, the regenerative power does not return to a battery directly but is stored in the double-layer capacitors for the next motoring action to suppress the excessive regenerative current to battery, and the regenerative power returns to the battery when the regenerative energy is larger than a certain value. The charging current to the battery is controlled to a constant value to extend the life-time of the battery.The transient and steady state characteristics of the system for 1.5kW IPM motor were investigated by both simulation and experiment. Parameters of double-layer capacitor were 115V and 207F. The validity of the simulated results was confirmed by comparing the simulated results with that obtained from the experimental. Furthermore, the fact that for two modes of the regenerating operation the system works properly, is confirmed by both simulated and experimental results.The proposed system can recovery the regenerative energy effectively and would be able to contribute for the extension of the life-time of the battery.