How do DC motors and AC motors work? What are the differences?

Many friends may not know much about DC motors and AC motors, the difference between the two is not very clear, but out of curiosity, looking around for answers, of course there are a lot of different sayings, Vacuz briefly give you an introduction to it!

DC motor and AC motor are both a kind of motor, running due to the action of magnetic field, and DC can be regarded as a kind of stepping motor. So what is the difference in principle between the two?

1. Motor structure is different

AC motors have a coil, the resistance of this coil is generally not very large (about 100 ohms).

A estrutura interna do motor CC é composta principalmente de estator e rotor, muitos dos quais costumavam ser motores com escovas, o rotor tem escovas e há sensores Hall no motor para detectar a posição. O processo de trabalho está constantemente em contato alternado com a placa de conversão, formando um campo magnético alternado e girando constantemente. O volume do motor CC é geralmente menor do que o volume do motor CA, e agora há mais motores CC sem escovas.

2. Different working principle

The AC supply voltage of the motor is AC, and the on/off of the motor can be controlled by AC switching elements.
For DC motor, its supply voltage is DC input, can be controlled by PWM technology. PWM is a duty cycle adjustable signal, can input different signals.

3. Different output power

DC motors generally have lower power than AC motors, especially brushless motors, which overcome many disadvantages of brushed motors, but also have their own disadvantages.

The above is the DC motor and AC motor working principle and the difference, I hope these tips can help you!

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