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What Is Variable Speed Electric Motor?

What Is Variable Speed Electric Motor?

December 26 , 2023 0

What is a variable speed motor. Variable speed motor is a rotary machine, it will convert electrical energy into mechanical energy, the built-in contains an electromagnet winding to generate a magnetic field or distributed stator winding and a rotating armature or rotor, the wire has a current through and by the action of the magnetic field to turn, some types of these machines can be used as motors, can also be used as generators.

Working Principle OF Variable Speed Motor

Motor (Motors) is to convert electrical energy into mechanical energy equipment, it is the use of the current coil in the magnetic field force rotation phenomenon, distributed in each user, the motor according to the use of different power is divided into DC motor and AC motor, most of the motor in the power system is AC motor, It can be a synchronous motor or an asynchronous motor (the stator magnetic field speed of the motor does not maintain a synchronous speed with the rotor rotation speed). The motor is mainly composed of stator and rotor. The direction of force movement of the current conductor in the magnetic field is related to the direction of the current and the direction of the magnetic induction line (magnetic field direction). The working principle of the motor is the action of the magnetic field on the current force, so that the motor rotates.

Application OF Variable Speed Motor

Usually the work part of the motor rotates, this motor is called the rotor motor; There are also linear motion, called linear motor. Motors offer a wide range of power, from milliwatts to megawatts. The use and control of the motor is very convenient, with self-starting, accelerating, braking, reversing, stopping and other capabilities, can meet various operating requirements; The working efficiency of the motor is higher, and there is no smoke, smell, no pollution to the environment, and the noise is smaller. Because of its series of advantages, it is widely used in industrial and agricultural production, transportation, national defense, commercial and household appliances, medical electrical equipment and other aspects.

Types OF Variable Speed Motors

1. According to the classification of working power supply according to the different working power supply of the motor, it can be divided into DC motor and AC motor. The AC motor is also divided into single-phase motor and three-phase motor.
2. According to the structure and working principle of the motor according to the structure and working principle can be divided into DC motor, asynchronous motor and synchronous motor.
Synchronous motor can also be divided into permanent magnet synchronous motor, reluctance synchronous motor and hysteresis motor.
Induction motor can be divided into induction motor and AC commutator motor. Induction motor is divided into three phase asynchronous motor, single phase asynchronous motor and shield pole asynchronous motor. Ac commutator motors are divided into single-phase series motors, AC-DC dual-purpose motors and repulsion motors.
Dc motor according to the structure and working principle can be divided into brushless DC motor and brushless DC motor. Brush DC motor can be divided into permanent magnet DC motor and electromagnetic DC motor. Electromagnetic DC motors are divided into series excited DC motors, shunt excited DC motors, separately excited DC motors and compound excited DC motors. Permanent magnet DC motor is divided into rare earth permanent magnet DC motor, ferrite permanent magnet DC motor and aluminum nickel cobalt permanent magnet DC motor.
3. According to the start and operation mode, the motor can be divided into capacitive start single-phase asynchronous motor, capacitive run single-phase asynchronous motor, capacitive start single-phase asynchronous motor and split phase single-phase asynchronous motor.
4. Classification by use Motor by use can be divided into drive motor and control motor.
Drive motor is divided into power tools (including drilling, polishing, polishing, slotting, cutting, reaming and other tools) motor, home appliances (including washing machine, fan, refrigerator, air conditioner, recorder, video player, vacuum cleaner, camera, hair dryer, electric shaver, etc.) motor and other general small mechanical equipment (including a variety of small machine tools, small Type machinery, medical equipment, electronic instruments, etc.) electric motor.
The control motor is divided into stepper motor and servo motor.
5. According to the structure of the rotor motor according to the structure of the rotor can be divided into cage induction motor (old standard called squirrel cage asynchronous motor) and wound rotor induction motor (old standard called wound asynchronous motor).
6. According to the running speed classification motor according to the running speed can be divided into high-speed motor, low speed motor, constant speed motor, speed control motor.
Low speed motor is divided into gear motor, electromagnetic reduction motor, torque motor and claw pole synchronous motor.
In addition to being divided into graded constant speed motor, stepless constant speed motor, graded variable speed motor and stepless variable speed motor, it can also be divided into electromagnetic variable speed motor, DC variable speed motor, PWM variable speed motor and switched reluctance variable speed motor