Difference between variable frequency motor and permanent magnet variable frequency motor

First of all, the main difference between variable frequency motor and permanent magnet variable frequency motor lies in their working principle and application.

Frequency conversion motor usually refers to the motor that adjusts the motor speed by changing the power supply frequency. This kind of motor generally needs an additional frequency converter to control the power frequency, so as to realize the speed regulation of the motor. Variable frequency motors are mainly used in applications that need variable speed and precise control, such as air conditioners, refrigerators, washing machines and other household appliances, as well as various industrial automation production lines.

Permanent magnet variable frequency motor is a kind of variable frequency motor excited by permanent magnet. This kind of motor combines the advantages of permanent magnet motor and variable frequency motor, with higher efficiency, greater torque and higher speed. Permanent magnet variable frequency motor is widely used in many high-performance occasions, such as electric vehicles, ships, wind power generation and other fields because of its efficient energy utilization and wide speed range.

Generally speaking, the design and application of variable frequency motor and permanent magnet variable frequency motor are very different, and the choice of which motor mainly depends on the specific application requirements.