Three phase ac asynchronous motor starting circuit

• Main Authors: XIE SHIHONG, DUAN MINGLIANG, LI MING, MENG YANJING, GAO ZEYU, RONG WEIQING
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2017
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The utility model discloses a three phase ac asynchronous motor starting circuit, including rectifier bridge, contravariant bridge, power frequency three -phase input voltage ua, ub, uc obtain rectified alternating current and press after the rectifier bridge rectification, rectified alternating current presses through contravariant bridge contravariant output three -phase AC voltage UA, UB, UC. The utility model discloses can realize three phase ac asynchronous motor's continuous vary voltage frequency conversion starting control, it is big to have a starting torque, and starting current is little, and the little advantage of torque vibrations is started have easy operation after the completion when switching to power frequency voltage simultaneously, switches and strikes little characteristics, and the heavy load that can be used to high -power three phase ac asynchronous motor is started. 本实用新型公开了种三相交流异步电动机起动电路，包括整流桥、逆变桥，工频三相输入电压Ua、Ub、Uc经整流桥整流后得到脉动直流电压，所述脉动直流电压经逆变桥逆变输出三相交流电压UA、UB、UC。本实用新型能够实现三相交流异步电动机的连续变压