Three-phase asynchronous motor variable frequency speed regulation method

Frequency control of motor speed is to change the frequency of the motor stator power,to change its

synchronous speed control method.Variable frequency speed regulation system is the main equipment to provide frequency conversion power of inverter,the inverter can be divided into permanent magnet motors for saleac-dc-ac frequency converter and ac-www.dongfeng-motor.com ac frequency converter two kinds big,cross-straight-to pay inverter are mostly used in China at present.Its features:There is no additional loss of high efficiency and speed the process;Application range is wide,can be used in the cage type asynchronous motor;Large range of speed regulation,and the characteristics of ac motor wind generator hard and high precision;Technology is complex,high cost,difficult maintenance;This method is suitable for the requirement of high precision,220v ac electric motors better speed control performance.