What is the difference between a motor and a motor?
What is a motor
Motor (English: Electricmachinery, commonly known as "motor") refers to an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction.
The motor is represented by the letter M (the old standard is D) in the circuit. Its main function is to generate the driving torque. As the power source of the electric appliance or various machines, the generator is represented by the letter G in the circuit, its main The role is to use electrical energy to convert into mechanical energy.
Motor division and classification
1. According to the type of working power: can be divided into DC motor and AC motor.
1) DC motors can be divided according to structure and working principle: brushless DC motor and brushed DC motor.
Brushed DC motors can be divided into: permanent magnet DC motors and electromagnetic DC motors.
Electromagnetic DC motor division: series-excited DC motor, shunt DC motor, separately excited DC motor and compound excitation DC motor.
Permanent magnet DC motor division: rare earth permanent magnet DC motor, ferrite permanent magnet DC motor and AlNiCo permanent magnet DC motor.
2) Among them, AC motors can also be divided into: single-phase motors and three-phase motors.
2. According to the structure and working principle can be divided: can be divided into DC motor, asynchronous motor, synchronous motor.
1) Synchronous motors can be divided into: permanent magnet synchronous motors, reluctance synchronous motors and hysteresis synchronous motors.
2) Asynchronous motors can be divided: induction motors and AC commutator motors.
Induction motors can be divided into three-phase asynchronous motors, single-phase asynchronous motors and shaded-pole asynchronous motors.
The AC commutator motor can be divided into: single-phase series-excited motor, AC-DC motor and repulsive motor.
3. According to the starting and running modes, it can be divided into: a capacitor-starting single-phase asynchronous motor, a capacitor-operated single-phase asynchronous motor, a capacitor-starting single-phase asynchronous motor, and a split-phase single-phase asynchronous motor.
4. It can be divided according to the purpose: drive motor and control motor.
1) Drive motor can be divided: electric tools (including drilling, polishing, polishing, grooving, cutting, reaming, etc.) with electric motors, household appliances (including washing machines, electric fans, refrigerators, air conditioners, recorders, video recorders) , motors, vacuum cleaners, cameras, hair dryers, electric razors, etc.) Motors and other general purpose small mechanical equipment (including various small machine tools, small machinery, medical equipment, electronic equipment, etc.).
2) The control motor is divided into: a stepping motor and a servo motor.
5. According to the structure of the rotor can be divided: cage induction motor (the old standard is called squirrel cage asynchronous motor) and wound rotor induction motor (the old standard is called wound asynchronous motor).
6. According to the operating speed can be divided: high-speed motor, low-speed motor, constant speed motor, speed control motor. Low-speed motors are further classified into gear reduction motors, electromagnetic reduction motors, torque motors, and claw-pole synchronous motors.
The speed regulating motor can be divided into a stepped constant speed motor, a stepless constant speed motor, a stepped variable speed motor and a stepless variable speed motor, and can also be divided into an electromagnetic speed regulating motor, a DC speed regulating motor, a PWM variable frequency speed regulating motor and Switched reluctance motor.
The rotor speed of an asynchronous motor is always slightly lower than the synchronous speed of the rotating magnetic field.
The rotor speed of the synchronous motor is always kept at the synchronous speed regardless of the load size.
What is a motor
A motor is a device that converts electrical energy into mechanical energy. It uses a coiled coil (that is, a stator winding) to generate a rotating magnetic field and acts on a rotor (such as a squirrel-cage closed aluminum frame) to form a magnetoelectric rotational torque. The electric motor is divided into a direct current motor and an alternating current motor according to the use of the power source. The electric motor in the electric power system is mostly an alternating current motor, and may be a synchronous motor or an asynchronous motor (the stator magnetic field speed of the motor and the rotational speed of the rotor are not kept at the synchronous speed). The motor is mainly composed of a stator and a rotor, and the direction in which the energized wire is subjected to the force in the magnetic field is related to the direction of the current and the direction of the magnetic induction line (the direction of the magnetic field). The working principle of the motor is that the magnetic field acts on the current to force the motor to rotate.
