The difference between induction motor and damping motor

Both induction motors and damping motors can be used to drive mechanical equipment. Both motors are AC motors, and induction motors operate through electromagnetic induction between the stator and rotor, inducing current in the rotor to achieve energy conversion at several points. Damping motors mainly involve the friction between the stator and rotor, and the frictional force between the protruding shaft shoulder generates rotational force.

1、 Different working principles

Induction motor mainly utilizes the deformation characteristic of piezoelectric material input voltage to generate mechanical vibration at ultrasonic frequency, and then designs a friction driven mechanism to make the ultrasonic motor rotate like an electromagnetic motor or move in a straight line. It consists of a rotor with a fixed stator that rotates. In a micro induction motor, there is a rotating magnetic field on the stator. When the rotating magnetic field acts on the conductor, it will induce electromotive force and generate current (this magnetic field comes from a three-phase power supply). This current forms a magnetic field inside the rotor, interacts with the magnetic field of the stator, and thus causes the rotor to start rotating; The working principle of a damping motor is to generate damping force through the interaction between the magnetic field and the current. When the angle difference between the magnetic field and the current is larger, the motor speed will decrease. Its working principle is characterized by that it will not produce rotation or torque when there is no external load. Unlike general motors, the speed and torque generated by a damping motor are independent of each other, and the torque size is only related to the motor current. The damping force can be controlled by adjusting the current size. Therefore, damping motors have a great advantage in control accuracy and reliability.

2、 Different structures

The main components of a high-precision induction motor include a stator, rotor, housing, and winding. The motor can function in limited space applications and has higher speed and torque capabilities, which can better meet more application needs; Compared with induction motors, high-precision damping motors have an additional damper, which is composed of eccentric mass, friction components, and springs. It is installed on the electronic rotor shaft. When the motor is running, the eccentric mass will generate eccentric force, causing damping friction on the rotor shaft, thereby increasing torque and making the motor start faster.

3、 Different application fields

Micro induction motors are mainly used in fields such as CNC machine tools, photography systems, computer peripherals, valve control, nuclear reactors, bank terminals, automatic winding sets, valve control, optoelectronic combination devices, medical equipment, and electronic clocks; Micro damping motors are mainly used in robots, analog control and motion control, pan tilt controllers for movie cameras, and motion control systems for medical equipment, all of which can use damping motors to achieve stable motion control.

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