We usually use the three-phase asynchronous motor starting mode, including direct starting, autotransformer buck starting,Y－△Step-down starting, rotor series resistance or frequency sensitive resistance starting, soft starter starting, frequency converter starting; Today, Senli Motor Xiaobian will take you to understand.

       We first briefly understand about direct start and autotransformer buck start, these two starting methods, generally when we start the motor, the voltage of the distribution bus is not lower than the nominal voltage of the system85%Generally speaking, as long as the rated power of the motor does not exceed the rated capacity of the power transformer30%, you can use the full pressure starting method,Three-phase asynchronous motorFull pressure starting, simple way, low cost, mainly used for small power motor starting.

       Autotransformer step-down starting: The high voltage side of the autotransformer is connected to the power grid, and the low voltage side is connected to the motor. When starting, the auto transformer tap is used to reduce the voltage of the motor. When the speed rises to a certain value, the auto transformer is automatically cut off, and the motor is connected to the power supply, and the normal operation is under full voltage.

       In this starting method, the tap position of the autotransformer can be selected to adjust the end voltage of the motor, and the starting torque ratio is star Delta step-down starts big.

       However, the auto-transformer investment is large, and it is not allowed to start frequently. It is only suitable for large capacity motors with star or triangle connections.

       Senli Motor,19Focus on the development and production of electric motors. Available if needed1688Search factory name "Shengzhou Chaoli Electric Appliance Factory" , Or online consultation message, we will have business personnel to get in touch with you, you can also contact us directly0575-8378-1127.