三角形接法三绕组单相电容电动机瞬态分析

Transient Analysis of Tri-Winding Single Phase Capacitance Motors with Delta-Connection

对三角形接法的三绕组单相电容感应电动机的瞬态过程进行仿真分析.为了得到瞬态特性,建立了三角形(△)接法的三绕组单相电容感应电动机在αβ坐标系下的瞬态数学模型,编写计算机仿真程序,通过实例对三角形接法的三绕组单相电容感应电动机的瞬态过程进行仿真计算;用对称分量法分析了三绕组单相电容感应电动机最小不对称运行时需要满足的条件,并由此初步计算电容的数值,然后通过计算机仿真加以确定.对仿真结果进行分析.仿真结果表明:三角形接法三绕组单相电容运转电动机起动转矩较小,适合于对起动要求不高的风机泵类负载;对于起动要求较高或较大的恒转矩负载,可采用双值电容来实现.三角形接法三绕组单相电容电动机带负载的能力约为三相感应电动机在额定电压下对称运行时的0.7倍左右.

This paper deals with the simulated transient analysis of tri-winding single-phase capacitance motors with delta-connection. To get the transient property, We put forward a mathematical model of the single-phase operation of three-phase induction motors with the delta-connected in α β coordinate. MATLAB language was used to develop the computer simulation program. The program was applied to simulate the transient process of tri-winding single-phase capacitance motors with delta-connection. The symmetrical components method was employed in the analysis of the minimum asymmetrical operation condition of tri-winding single-phase capacitance motors with delta-connection, and the value of capacitance was determined. The simulation results showed that, compared with three-phase induction motor, tri-winding single-phase capacitance-operation motors have a smaller starting-torque and have about 0.7 times of loading ability.