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what is the difference between ac and dc electric motors?
by：Hoprio
2020-10-29
The electric motor converts electronic energy into mechanical energy using AC or DC power.
The structure of AC and DC Motors is different and the performance is different.
To fully understand the difference between AC and DC Motors, it is necessary to understand the power itself.
Electricity is a very different energy source for heat or light, because it is not common in nature.
Current refers to the movement of electrons along a conductor, such as a wire.
The terms AC and DC refer to the direction of the electron along the conductor.
In the AC motor, the electrons flow along the AC current, and in the DC motor, the electrons flow along the DC current.
The DC current in the DC motor means that the electrons flow forward continuously, while in the AC motor the electrons switch directions regularly, thus alternating forward and backward.
Electricity and magnetism are closely connected, and Thomas Edison initially discovered the direct current, by placing the magnetic field near the wire and observing the electrons in the wire in the direct current, because they are rejected and attracted by the Arctic and Antarctic magnetic fields.
The AC power supply was discovered by scientist Nikola Teklas by applying a rotating magnet on the wire.
Teklas found that when the magnet rotates, the flow direction of the electron is flipped, and this method of alternating current reserves energy better than direct current, and makes the transfer of different power possible.
The AC motor consists of two parts: the external stator that produces the rotating magnetic field and the internal rotor that receives the torque from the rotating magnetic field.
According to the rotor used, there are two different types of AC motor.
One type is the induction motor, which uses the induction current to generate a magnetic field on the rotor and can only be slightly slower or faster than the power supply frequency.
Another type of AC motor is a synchronous motor that does not depend on the induced current, which can rotate accurately at the speed of the power supply frequency.
The DC motor consists of six components: Rotor, converter, shaft, brush, magnetic field magnet and DC power supply.
There are two main types of DC motors, brush and brush.
The brushed DC motor provides simple control of high reliability and motor speed.
The initial cost of the brush DC motor is low, but as the maintenance costs involved in replacing the brush and spring are getting higher and higher, the price may rise.
The brushless DC motor uses an external electronic switch that is synchronized with the rotor position.
Where accurate control of the motor speed is required, the brushless DC motor is usually used.
The structure of AC and DC Motors is different and the performance is different.
To fully understand the difference between AC and DC Motors, it is necessary to understand the power itself.
Electricity is a very different energy source for heat or light, because it is not common in nature.
Current refers to the movement of electrons along a conductor, such as a wire.
The terms AC and DC refer to the direction of the electron along the conductor.
In the AC motor, the electrons flow along the AC current, and in the DC motor, the electrons flow along the DC current.
The DC current in the DC motor means that the electrons flow forward continuously, while in the AC motor the electrons switch directions regularly, thus alternating forward and backward.
Electricity and magnetism are closely connected, and Thomas Edison initially discovered the direct current, by placing the magnetic field near the wire and observing the electrons in the wire in the direct current, because they are rejected and attracted by the Arctic and Antarctic magnetic fields.
The AC power supply was discovered by scientist Nikola Teklas by applying a rotating magnet on the wire.
Teklas found that when the magnet rotates, the flow direction of the electron is flipped, and this method of alternating current reserves energy better than direct current, and makes the transfer of different power possible.
The AC motor consists of two parts: the external stator that produces the rotating magnetic field and the internal rotor that receives the torque from the rotating magnetic field.
According to the rotor used, there are two different types of AC motor.
One type is the induction motor, which uses the induction current to generate a magnetic field on the rotor and can only be slightly slower or faster than the power supply frequency.
Another type of AC motor is a synchronous motor that does not depend on the induced current, which can rotate accurately at the speed of the power supply frequency.
The DC motor consists of six components: Rotor, converter, shaft, brush, magnetic field magnet and DC power supply.
There are two main types of DC motors, brush and brush.
The brushed DC motor provides simple control of high reliability and motor speed.
The initial cost of the brush DC motor is low, but as the maintenance costs involved in replacing the brush and spring are getting higher and higher, the price may rise.
The brushless DC motor uses an external electronic switch that is synchronized with the rotor position.
Where accurate control of the motor speed is required, the brushless DC motor is usually used.
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