First, the advantages of DC motor.
1. DC motor has good start-up characteristics and speed regulation characteristics.
2. The torque of DC motor is relatively large.
3. Repairs are cheaper.
4. The DC of DC motor is more energy-saving and environmentally friendly than AC.
Second, the shortcomings of DC motor.
1. It is expensive to manufacture DC motor.
2. There is a carbon brush.
Third, the advantages of AC motor.
1. Ac motors are cheaper to make.
2. With the development of vector frequency conversion technology, variable frequency motor can be used to simulate DC current.
3. Compared with DC motor, it has enough advantages in simple structure, easy maintenance, low environmental requirements, energy saving and improving productivity, so that AC speed regulation has been widely used in industrial and agricultural production, transportation, national defense and daily life.
Four,Shortcomings of AC motors.
1. The starter and speed regulation of AC motor is poor.
2. Ac motor can be divided into synchronous motor and asynchronous motor according to its rotational speed.