The difference between DC motor and AC motor --X-TEAM brushless motor

The difference between DC motor and AC motor China motor biotept

1. A DC motor is a motor that can convert DC power and mechanical energy. When it is used as a motor, it is a DC motor that converts electrical energy into mechanical energy. When the generator is running, it is a DC generator that converts mechanical energy into electrical energy. The working principle of the DC generator is to change the alternating electromotive force induced in the armature coil by the commutation function of the commutator and the brush to change the DC electromotive force when it is taken out from the brush end.

Second, the AC motor is a machine for converting mechanical energy and AC power. Due to the tremendous development of AC power systems, AC motors have become the most commonly used motors. Compared with DC motors, AC motors have no commutator, so they are simple in structure, easy to manufacture, and relatively robust. They are easy to make motors with high speed, high voltage, high current and large capacity. AC motor power covers a wide range, from a few watts to hundreds of thousands of kilowatts, or even millions of kilowatts.

Third, the motor whose speed is proportional to the voltage is a DC motor. The motor whose speed and frequency are proportional is called AC motor.

Fourth, the DC motor is commutated by coil, and the AC motor is phase-transformed.

Five, DC motor is voltage regulation, and AC motor is frequency control, which is the watershed of DC motor and AC motor.

6. The fundamental difference between DC motors and AC motors is that the potential balance equations are different:

1. The potential balance equation of a DC motor is: U=CΦn

2. The potential balance equation of the AC motor is: U=CΦf

Seventh, from the structural point of view, the principle of DC motor is relatively simple, but the structure is complex and not easy to maintain. The principle of the AC motor is complicated but the structure is relatively simple, and it is easier to maintain than the DC motor.