Variable frequency speed regulation method and applicable occasion of three phase asynchronous motor
Source：Nanyang Electric Visit：299 Pushtime：2018-08-11 15:54:33 【Print】【Return】【Font：Large Middle Small】
Variable frequency speed regulation is a speed regulating method to change the frequency of motor stator power and change its synchronous speed. The main equipment of VVVF system is to provide frequency conversion.
Frequency converter of power supply can be divided into AC-DC-AC frequency converter and AC-AC frequency converter. At present, AC-DC-AC frequency converter is mostly used in China. Its characteristics:
High efficiency, no additional loss during speed adjustment.
It can be widely used in cage asynchronous motors.
The speed range is large, the characteristics are hard and the accuracy is high.
The technology is complex, the cost is high, and the maintenance and troubleshooting are difficult.
This method is suitable for occasions with high accuracy and good speed regulation performance.