Energy-consumption braking control module of three-phase asynchronous motor

Abstract

The invention relates to an energy-consumption braking control module of a three-phase asynchronous motor, comprising a power supply unit, a single chip control unit and a braking direct-current voltage output unit, wherein direct-current voltage output by the braking direct-current voltage output unit is transmitted to a two-phase stator winding of a motor when the motor stops so as to generate braking torque. The energy-consumption braking control module of a three-phase asynchronous motor is characterized in that the single chip control unit detects the work state of the motor by the work conduction angle of the voltage output unit, and a preset program controls the size of the conduction angle so as to regulate the output time and magnitude of the direct-current voltage required by braking. The energy-consumption braking control module of a three-phase asynchronous motor also comprises a zero cross signal detection unit, a running state detection unit, a winding temperature detection unit and a braking current detection unit, wherein each unit respectively outputs a corresponding signal transmitted to the single chip control unit for processing. The invention adopts integrated IC, has little used elements, compact structure, independent products and convenient installation and use and is beneficial to popularization and application; and the single chip is flexible to control, the intellectualized degree is high, and the braking of the motor is safe and stable.

Description

technical field [0001] The invention relates to a device for stopping an AC motor using a method of supplying DC to the motor, especially a DC power supply to the motor to consume the inertial energy of the motor rotor to generate a braking torque when the motor is powered off, so as to stop the motor The dynamic braking control module of the three-phase asynchronous motor. Background technique [0002] Three-phase asynchronous motors, especially squirrel-cage three-phase asynchronous motors, are widely used as supporting power for mechanical equipment because of their simple structure, reliable operation and easy maintenance. In the application process, the motor often needs to have a braking function to meet the requirements of accurate positioning, reciprocating operation and frequent starting of various machinery. Such as woodworking machinery, food machinery, printing machinery, metallurgical machinery and various machine tools. At present, the braking methods of thre...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the disadvantages in the prior art that each unit of energy-consumption braking of the electric motor is independent, there is no standard product, the use is limited and the magnitude of the braking DC current is not easy to control, the present invention provides a motor that can be installed in the motor junction box Integrated design of energy consumption braking control module for three-phase asynchronous motor

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