Research on Automatic Internal Compensation Technology for Asynchronous Motors
The three-V connection method of asynchronous motors involves connecting the initial ends of the main winding Wa1,Wb1,and Wc1 to A1,B1,and C1 respectively,and connecting the corresponding terminal ends of the secondary winding Wc2,Wa2,and Wb2,forming a V-shaped connection with a 60-degree angle and nine connection terminals.The main dominant current compensation is achieved by connecting the main capacitors C01,C02,and C03 to three pairs or three connection terminals,while the secondary capacitors C04,C05,and C06,connected to three pairs of connection terminals,are dynamically adjusted through PWM control using a regu-lator to achieve internal compensation with a power factor close to 1.0.The three-phase winding-type rotor winding can be temporarily connected to the terminals of the secondary winding,and motor startup with heavy loads can be achieved using a three-phase controller.
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