Current location - Education and Training Encyclopedia - Graduation thesis - Is DC brushless motor the mainstream of electric vehicle hub motor? Has switched reluctance motor been eliminated? What are the disadvantages of switched reluctance?
Is DC brushless motor the mainstream of electric vehicle hub motor? Has switched reluctance motor been eliminated? What are the disadvantages of switched reluctance?
1. Compared with asynchronous motor, switched reluctance motor should be compared under the condition of energy saving and frequency conversion. When both of them need frequency conversion drive, switched reluctance motor will kill asynchronous motor, especially when it is fully loaded and overloaded, so asynchronous motor will have to wait for the machine to burn.

2. Compared with permanent magnet motors, switched reluctance motors are 30% to 40% more expensive at high power. Permanent magnet motors are suitable for servos below 3KW, and can be used as electric vehicles in China if subsidies can cheat and force them.

3. Torque ripple is a worldwide problem, which exists in all motors. The torque ripple of switched reluctance motor is the worst, which is mainly related to the motor. No one will tell you what it is related to, because it is a technical secret. Electronic control is mature at home and abroad, but there is a gap between domestic and foreign countries, so there are mature applications abroad. Switched reluctance motor belongs to the latest motor technology and will not enter China so soon, because China's main industrial spirit is imitation. People in this line should know that the motor of the German wall-breaking machine has been dismantled and copied countless times in the north and south of the motherland.

4. Power density and efficiency are not the problems of switched reluctance motor, but the problems of switched reluctance motor are torque ripple, remember that it is torque ripple. If you still stay in reading papers to find the answer, you are still in the primary level, and you will never know the answer until the switched reluctance motor matures.

5. Rare earths, permanent magnet motors, electric vehicles, and national defense resources will not be explained, leaving them for everyone to study.