Electric motor, also known as motor or electric motor, is an electrical device that converts electrical energy into mechanical energy and can use mechanical energy to generate kinetic energy to drive other devices. There are many types of motors, but they can be roughly divided into AC motors and DC motors for different occasions.
There are many types of motors. In terms of basic structure, their composition is mainly composed of a stator and a rotor.
The stator is stationary in space, while the rotor is rotatable around the shaft and supported by bearings.
There will be a certain air gap between the stator and the rotor to ensure that the rotor can rotate freely.
The stator and the rotor are wound with a coil, and an electric current is generated to generate a magnetic field, which becomes an electromagnet. One of the stator and the rotor can also be a permanent magnet.
Classified by power supply:
DC motor Using permanent magnets or electromagnets, brushes, commutators and other components, the brushes and commutators continuously supply the externally supplied DC power to the rotor’s coils and change the direction of the current in a timely manner so that the rotor can follow the same direction Keep spinning.
AC motor Pass the alternating current through the stator coil of the motor, the design allows the surrounding magnetic field to push the rotor at different times and at different positions, so that it continues to run
Pulse motor The power supply is processed by a digital IC chip and becomes a pulse current to control the motor. A stepping motor is a type of pulse motor.
Classified by structure (both DC and AC power): Synchronous motor It is characterized by constant speed and no need for speed regulation, small starting torque, and stable speed and high efficiency when the motor reaches the running speed.
Asynchronous motor
Induction motor Features are simple and durable structure, and can use resistance or capacitor to adjust the speed and forward and reverse. Typical applications are fans, compressors, air conditioners
Reversible motor Basically the same structure and characteristics as the induction motor. The feature is that a simple braking mechanism (friction brake) is built in the rear of the motor. The purpose is to achieve instantaneously reversible characteristics by adding a friction load and reduce the effect of the induction motor. The amount of rotation produced by the force.
Stepping motor The characteristic is a kind of pulse motor. The motor that rotates gradually at a certain angle is processed by the Open Loop control method. Therefore, it does not need the feedback device of position detection and speed detection to achieve accurate position and Speed control and good stability.
Servo motor It is characterized by precise and stable speed control, fast acceleration and deceleration response, rapid action (quick reversal, rapid acceleration), small size, light weight, high output power (that is, high power density), and high efficiency. It is widely used in position and speed control on.
Linear motor With long stroke drive and high precision positioning capability.
other Rotary Converter, Rotating Amplifier, etc.
There are many uses for electrics, from heavy industries to small toys. Different types of electric motors are selected in different environments. Here are some examples: Wind-making equipment, such as electric fans, electric toy cars, boats and other lifts, elevators powered by electric vehicles, such as underground railways, tram factories and hypermarkets Electric automatic door electric rolling shutter on the bus.
Optical drive printer washing machine water pump disk drive electric shaver tape recorder video recorder CD player industrial and commercial use
Express elevator Working mother machine (such as machine tool) Textile machine Mixer