绕线转子自起动永磁电机斩波起动控制方法  

Chopper starting control of wound-rotor line-start PMSM

作　　者：冯桂宏[1] 李庆旭[1] 戴思锐[1] 王帅[1] 张炳义[1] 

机构地区：[1]沈阳工业大学电气工程学院,辽宁沈阳110870

出　　处：《电机与控制学报》2016年第8期64-73,共10页Electric Machines and Control

基　　金：国家重大科学仪器设备开发专项(2012YQ05024207);国家自然科学基金(51077093)

摘　　要：针对绕线转子自起动永磁电机(WRLS-PMSM)PWM斩波调阻起动控制方法进行研究,通过调节转子绕组回路外串等效电阻,使起动平均转矩始终保持在最大值,改善起动性能。将定转子交流电量和阻抗关系折算到直流斩波控制环节,建立PWM斩波调阻准动态数学模型,推导出斩波占空比与转子等效外串电阻关系;总结输出最大合成异步转矩时的转子外串电阻与转速关系,进而得到斩波控制规律;搭建WRLS-PMSM起动性能实验平台,将WRLS-PMSM转子斩波调阻起动与转子自短路起动、鼠笼转子永磁电机直接起动性能进行对比分析,发现采用实时最大异步转矩输出的转子斩波起动方法能够有效提高永磁电机的起动转矩,抑制起动电流,提高牵入能力。PWM chopper resistance regulation starting control method was proposed for the wound rotor line-start PMSM （WRLS-PMSM）. In order to improve the starting performance, the average starting torque always was kept in maximum by adjusting the equivalent resistance series connected to rotor wind- ing in the process of starting. The relation between the equivalent series resistance and chopper duty ratio was deduced with PWM chopper adjustable resistance quasi dynamic mathematical model establishment by converting impedance and voltage to the dc chopper link; when the synthetic asynchronous torque is the biggest, the relationship between the equivalent series resistance in the rotor side and speed can be deduced. The chopper rules can be acquired, which sets the starting performance experimental platform of WRLS-PMSM. And the starting performance was tested. The comparison with the rotor winding short-cir- cuit starting and traditional squirrel cage rotor LS-PMSM verified the effectiveness of the proposed ap- proach for increasing greatly the starting torque, limiting the starting current as well as improving the pull- in performance.

关 键 词：绕线转子自起动永磁电机 起动控制 PWM斩波 电阻调节 最大异步转矩 

分 类 号：TM351[电气工程—电机]