Developmental Research of Brushless AC Generator without Exciter

1.定子直流励磁无刷三相同步发电机的研制：研制了无励磁器的无刷2极三相同步发电机。实验证明，这种发电机是可以实际使用的。无刷三相同步发电机的磁场分析：发电机的定子包含两个独立的绕组，它们具有不同的磁极数。转子由用二极管短路的磁场线圈组成。通过现场分析，发现发电机的磁通分布与普通发电机基本相同。定子直流励磁无刷单相同步发电机的研制：从实验结果证实，如果发电机励磁电路布置合理，即使定子直流电流恒定，输出电压也能保持恒定。无刷自激式单相同步发电机的设计研究：提出了一种新的有限元分析方法，缩短了计算时间，提高了计算精度。利用该技术，使发电机的优化设计，包括显著性和饱和的影响成为可能。逆变励磁鼠笼式感应发电机的研制：构建了GTO晶闸管逆变器并与感应电机相结合。实验结果表明，在逆变器中加入脉宽调制（PWM）可以提高系统的效率。定子直流励磁无刷同步发电机的设计研究：通过对发电机结构的研究，发现电压的调节不仅取决于负载绕组轴与励磁绕组轴之间的夹角，还取决于励磁电路的布置。鼠笼式感应发电机控制研究：获得了由逆变器向感应发电机提供无功功率的GTO逆变-感应发电机系统的主要试验数据。少

1.DEVELOPMENT OF STATOR DC-EXCITED BRUSHLESS THREE-PHASE SYNCHRONOUS GENERATOR: The brushless 2-pole three-phase synchronous generator without exciter was constructed and investigated in detail. It was proved experimentally that this generator was to be practical use.2.MAGNETIC FIELD ANALYSIS OF BRUSHLESS THREE-PHASE SYNCHRONOUS GENERATOR: The stator of generator contains two separate windings which have different pole numbers. The rotor consists of field coils short-circuited with diodes. As a result of field analysis, it was found that the flux distribution of generator was almost the same as that of ordinary generator.3.DEVELOPMENT OF STATOR DC-EXCITED BRUSHLESS SINGLE-PHASE SYNCHRONOUS GENERATOR: From experimental results, it was confirmed that, if the arrangement of generator field circuit was suitable, the output voltage could be kept constant even under constant stator dc current.4.STUDY OF BRUSHLESS SELF-EXCITED TYPE SINGLE-PHASE SYNCHRONOUS GENERATOR DESIGN: A new technique of … More finite element analysis which gives a shorter cpu time and an accuracy solution was developed. By means of this technique, optimal design of generator including the effects of saliency and saturation became possible.5.DEVELOPMENT OF SQUIRREL CAGE INDUCTION GENERATOR EXCITED BY INVERTER: GTO thyristor inverter was constructed and combined with a induction machine. Experimentally, it was evident that, by applying Pulse Width Modulation(PWM) to the inverter, an efficiency of this system was improved.6.STUDY OF STATOR DC-EXCITED BRUSHLESS SYNCHRONOUS GENERATOR DESIGN: From the investigation of generator structure, it was found that the voltage regulation depended on the angle between load winding axis and exciting winding axis, and also on the arrangement of field circuit.7.STUDY OF SQUIRREL CAGE INDUCTION GENERATOR CONTROL: The principal test data for the GTO inverter - induction generator system, in which the inverter supplies the reactive power required to the induction generator, were obtained. Less