Expanded knowledge
Motor
Motor (English: Electric machinery, commonly known as "motor") refers to the law of electromagnetic induction to achieve the conversion of electrical energy or transmission of an electromagnetic device. In the circuit with the letter M (old standard with D). Its main function is to generate driving torque, as the power source of electrical appliances or various machinery. Generator is represented by the letter G in the circuit. Its main role is to use mechanical energy into electrical energy, the most commonly used at present, the use of heat, water, etc. to drive the generator rotor to generate electricity.
Main uses
1, servo motor
Servo motor is widely used in a variety of control systems, can be converted into the input voltage signal to the mechanical output of the motor shaft, dragging the controlled components, so as to achieve the purpose of control.
Servo motor has a DC and AC points, the earliest servo motor is a general DC motor, in the case of control precision is not high, before the use of general DC motor as a servo motor. The current DC servo motor from the structure, is a small power DC motor, its excitation more armature control and magnetic field control, but usually use armature control.
2, stepper motor
Stepper motor is mainly used in the field of CNC machine tool manufacturing, due to the stepper motor does not require A/D conversion, can be directly converted to digital pulse signals into an angular displacement, so it has been regarded as the ideal CNC machine tool actuating elements.
In addition to their use in CNC machine tools, stepper motors can also be used in other machinery, such as as motors in automatic feeders, as motors in general-purpose floppy disk drives, and in printers and plotters.
3, torque motor
The torque motor is characterized by low speed and large torque. Generally in the textile industry often use AC torque motor, its working principle and structure and single-phase asynchronous motor of the same.
4, switched reluctance motor
Switched reluctance motor is a new type of speed motor, the structure is extremely simple and strong, low cost, excellent speed performance, is a strong competitor of the traditional control motor, has a strong market potential.
5, brushless DC motor
Brushless DC motor mechanical characteristics and regulating characteristics of good linearity, wide speed range, long life, easy maintenance and low noise, there is no brush caused by a series of problems, so this motor in the control system has great applications.
6, DC motor
Direct current motor has good speed performance, easy to start, able to load the advantages of starting, so the current DC motor is still widely used, especially after the emergence of silicon controlled DC power supply.
7, asynchronous motor
Asynchronous motor has a simple structure, manufacturing, easy to use and maintenance, reliable operation and smaller quality, lower cost and other advantages. Asynchronous motor is widely used to drive machine tools, pumps, blowers, compressors, lifting and winching equipment, mining machinery, light industrial machinery, agricultural and sideline product processing machinery and most of the industrial and agricultural production machinery, as well as household appliances and medical equipment.
There are more applications in household appliances, such as fans, refrigerators, air conditioners, vacuum cleaners and so on.
8, synchronous motor
Synchronous motor is mainly used for large machinery, such as blowers, pumps, ball mills, compressors, rolling mills, and small, micro-instrumentation or as a control element. Three-phase synchronous motor is the main body. In addition, it can also be used as a regulator to deliver inductive or capacitive reactive power to the grid.