The Difference Between Electric Motors and Electric Motors

Electric machine (commonly known as "motor") refers to an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction.

The motor is represented by the letter M (old standard D) in the circuit, and its main function is to generate driving torque as a power source for electrical appliances or various machinery. The generator is represented by the letter G in the circuit, and its main function is to convert electrical energy into mechanical energy.

1、 Motor classification and classification

(1). According to the type of working power supply, it can be divided into DC motors and AC motors.

(2). According to structure and working principle, it can be divided into DC motors, asynchronous motors, and synchronous motors.

(3). According to the starting and operating modes, it can be divided into: capacitor starting single-phase asynchronous motor, capacitor operating single-phase asynchronous motor, capacitor starting operating single-phase asynchronous motor, and split phase single-phase asynchronous motor.

(4). It can be divided into driving motors and control motors according to their purpose.

(5). According to the structure of the rotor, it can be divided into cage induction motors (formerly known as squirrel cage asynchronous motors) and wound rotor induction motors (formerly known as wound asynchronous motors).

(6). According to the operating speed, it can be divided into high-speed motors, low-speed motors, constant speed motors, and variable speed motors. Low speed motors are further divided into gear reduction motors, electromagnetic reduction motors, torque motors, and claw pole synchronous motors.

2、 What is an electric motor?

A motor is a device that converts electrical energy into mechanical energy. It uses the energized coil (that is, the stator winding) to generate a rotating magnetic field and act on the rotor (such as a squirrel cage closed aluminum frame) to form a magnetoelectric rotating torque. Electric motors are divided into DC motors and AC motors according to the different power sources used. Most of the motors in the power system are AC motors, which can be synchronous or asynchronous motors (the stator magnetic field speed of the motor does not maintain synchronous speed with the rotor rotation speed). An electric motor mainly consists of a stator and a rotor, and the direction of the force acting on the energized wire 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 an electric motor is the effect of a magnetic field on the force acting on the current, causing the motor to rotate.

3、 The basic structure of an electric motor consists of a stator, rotor, and other accessories.

The DC motor adopts an octagonal fully laminated structure with series excitation windings, suitable for automatic control technology that requires forward and reverse rotation. According to user needs, it can also be made into a series excitation winding. Motors with a center height of 100-280mm do not have compensation windings, but motors with a center height of 250mm or 280mm can be made with compensation windings according to specific circumstances and needs. Motors with a center height of 315-450mm have compensation windings. The overall installation dimensions and technical requirements of the motor with a center height of 500-710mm comply with IEC international standards, and the mechanical dimensional tolerances of the motor comply with ISO international standards.

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