级联式无刷双馈电机的一种改进励磁方式  

A Way of Improving Excitation in the Cascading Brushless Doubly-Fed Motor

作　　者：李滨[1] 李岚[1] 

机构地区：[1]太原理工大学,太原030024

出　　处：《微特电机》2016年第9期29-32,50,共4页Small & Special Electrical Machines

摘　　要：在多种风力发电机中,无刷双馈电机以其高可靠性、良好的电气性能以及较高的低电压穿越能力,成为风力发电机中的佼佼者。级联式无刷双馈电机是电机实现无刷化的最简单方法,但此种电机存在励磁损耗较大,导致发电机效率不高的问题。分析了它的优势和不足,研究了无刷双馈风电机组的励磁系统,提出了功率绕组端并联电容补偿励磁的方法。此方法能够降低转子励磁电流,从而减少了电机的损耗,提高了风力机发电效率。Because of its high reliability,good electrical properties and high low- voltage ride- through capability,the brushless doubly- fed motor becomes one of the best VSCF generators in a variety of wind turbines. The cascading brushless doubly- fed motor is the simplest way for realizing the brushless motor,but this kind of motor excitation loss is bigger,lead to the low efficiency of generator. Its advantages and disadvantages were analyzed,brushless doubly- fed wind turbine excitation system was studied,and power excitation windings terminal shunt capacitance compensation method was proposed. This method can reduce the rotor excitation current,thus reducing losses in the motor,improving power generation efficiency of the wind turbine.

关 键 词：级联式无刷双馈电机 辅助励磁 电机损耗 

分 类 号：TM315[电气工程—电机]