When an AC asynchronous motor is started at a rated voltage, the initial starting current will be very large, often exceeding many times (usually 5-7 times) the rated current. In order to reduce the starting current without causing serious impact on the power grid, it is usually The method of reducing the voltage to start the AC asynchronous motor. The common method of reducing the voltage is to use a reactor or an autotransformer. The starting process of the AC motor is very short (usually several seconds to two minutes). Device or autotransformer. The starting motor power can be from 220KW-3150KW. The starting voltage percentage of the starting autotransformer or starting reactor can be selected according to the allowed starting current and required starting torque to achieve step-down starting. The starting voltage percentage is generally determined by the user, and can also be based on the specific motor model of the user. And require the design of various starting reactors.

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