三绕组并联式单相感应电动机起动方式研究

为了保证三绕组并联式单相感应电动机的起动性能,研究了该种电机的动态特性和起动方式.基于电磁关系,建立动态数学模型,并进行仿真计算.为了验证该模型的正确性和有效性,将仿真结果与试验结果进行对比.利用该仿真模型详细分析电容对该种电机起动性能的影响,并给出结构简单的单电容起动电路.仿真和实验结果表明,选择合适的起动电容和运行电容,可以使三绕组并联式单相感应电动机具有良好的起动性能和稳态运行性能.在实际应用中,使用双起动电容电路可以保证良好的起动性能,选择单电容起动电路,可以简化电路结构,节约成本.

Study of starting method for single-phase induction motor with three parallel-connected windings

To ensure the starting performance of the single-phase induction motor with three parallel-connected windings,this dynamic characteristics and starting methods were studied.At first,the dynamic mathematical model of the proposed motor was established according to the electromagnetic relationship and the simulation analysis was carried out.Secondly,in order to verify the correctness and effectiveness of the dynamic mathematical model,the experimental results were compared with simulation results.Thirdly,based on the simulation model,the influence of capacitors on the starting performance was analyzed in detail,and a simple circuit with only one starting capacitor was put forward.The experiment and simulation results show that selecting the appropriate starting capacitors and operating capacitors can make the proposed motor have excellent starting performance and approximately symmetric three-phase currents under steady-state operation.In actual application,the circuit with starting and operating capacitors can ensure good starting performance,whereas,the circuit with one starting capacitor can be chosen to simplify the structure as well as save the costs.