Variable Frequency Speed Regulation Of Three-phase Asynchronous Motors

Variable frequency speed regulation is a method of adjusting the synchronous speed of a motor by changing the frequency of its stator power supply. The main equipment of the variable frequency speed control system is the frequency converter that provides variable frequency power. The frequency converter can be divided into two categories: AC-DC-AC frequency converter and AC-AC frequency converter. Most domestic users use AC-DC-AC frequency converters. Its characteristics:
1. High efficiency, no additional losses during the speed regulation process;
2. Widely applicable and suitable for cage type asynchronous motors;
3. Large speed range, hard characteristics, and high precision;
4. The technology is complex, the cost is high, and maintenance and repair are difficult.
This method is suitable for situations that require high precision and good speed regulation performance.