Developmental Research of PWM Current Source Inverter-Converter System with Sinusoidal Inputs and Outputs

1.新型正弦输入PWM三相变换器研制昭和第62年，专门订购了10kva PWM电流源型逆变-变换器系统的试验设备。利用实验设备，对三相变流器的PWM技术进行了详细的研究，确定了最优的PWM模式。研制了一种新型正弦输入PWM单相变换器，并通过实验和理论验证了该变换器的可行性。正弦输出PWN电流源逆变器PWM技术的建立采用牛顿法进行数值分析，得到了无谐波的最优波形。实验和分析结果证明，该逆变器在较宽的逆变频率范围内，采用了最优的PWM模式来控制正弦电流。四象限异步电动机驱动的PWM电流源变换器系统的研制通过试验装置实现了四象限异步电动机的驱动，开发了转差频率控制的最优系统。基于正弦输入输出的PWM电流源型逆变-变换器系统矢量控制研究实验证明，通过改变逆变部分PWM模式的调制指标，可以实现输出电流的快速调节。同步电机和无换向器电机的运行特性研究通过试验装置对同步电机进行驱动，观察到同步电机在大转速范围内的平稳驱动。输入输出为正弦波的PWM MOS FET电流源型逆变-变换器系统的研究应用MOS FET从理论上证实了该系统具有完美的正弦波电流。与PWN电压源型逆变变换器系统的比较通过与PWM电压源型逆变变换器系统的比较，发现该系统是功率转换电路配置的目标。少

1.Development of New PWM Three-Phase Converter with Sinusoidal Inputs At the 62th year of Showa, test facilities for 10 kVA PWM current source inverter-converter system were purchased with special order. By using the test facilities, PWM technique for three-phase converter was investigated in detail, and optimal PWM pattern was decided.2.Development of New PWM Single-Phase Converter with Sinusoidal Inputs New single-phase converter was developed, and by the experimental and theoretical results it was verified that the single-phase converter was available.3.Establishment of PWM Technique for PWN Current Source Inverter with Sinusoidal Outputs By numerical analysis employing the Newton methods, the optimal pattern which contains no harmonics was derived. The experimental and the analyzed results proved that this inverter liad sinusoidal currents by utilizing the optimal PWM pattern, over a wide range of inverter frequency.4.Development of PWM Current Source Inverter-converter System for … More Four-quadrant Drive of Induction Motor Induction motor was driven in four-quadrant by the test facilities, and the optimal system for slip frequency control was developed.5.Research of Vector Control by PWM Current Source Inverter-converter System with Sinusoidal Inputs and Outputs The experiment proved that a Quick regulation of output currents was achieved by varying the modulation index for the PWM pattern in the inverter section.6.Research of Operating Characteristics of Synchronous Motor and Commutatorless Motor Syriclironous motor was driven by the test facilities, and smooth drive of the motor over a wide range of speed was observed.7.Research of PWM MOS FET Current Source Inverter-converter System with Sinusoidal Inputs and Outputs It was theoretically confirmed that the system had perfect sinusoidal currents by applying the MOS FET.8.Comparison with PWN Voltage Source Inverter-converter System As a results of comparison with PWM voltage source inverter-converter system, it was found that this system was the goal of circuit configuration for power conversion. Less