Current protection device of motor

Abstract

The present invention discloses a current protection device of a motor. The device includes a single chip microcomputer control chip, a current protection value setting module, a current detection module, a current protection delay mechanism module, a power display color lamp row device, a motor idling time control module, a power display, a motor switch on-off controller and a power supply control module. The single chip microcomputer control chip is connected to the current protection value setting module. The single chip microcomputer control chip is connected to the current detection module. The single chip microcomputer control chip is connected to the current protection delay mechanism module. The single chip microcomputer control chip is connected to the power display color lamp row device. The single chip microcomputer control chip is connected to the motor idling time control module. The single chip microcomputer control chip is connected to the power display. The single chip microcomputer control chip is connected to the motor switch on-off controller. The power supply control module is connected to the single chip microcomputer control chip. According to the device, the structure is simplified, the low speed and high speed sectionalized protection of motor current is carried out, and an automatic power-off function is realized for an inoperative state of the motor.

Description

Technical field [0001] The invention relates to the field of motor control, in particular to a current protection device for a motor. Background technique [0002] Electric motors are one of the most widely used equipment in the electromechanical industry and are the power source of other electromechanical equipment. The normal output of power by the motor is a prerequisite for the normal operation of other driving equipment. In modern industrial and mining enterprises, electric motors account for more than 90% of all power. Most of these motors are used in harsh environments, especially in thermal power plants, mining, steel, metallurgy and petrochemical enterprises, as well as high temperature, high humidity, Under dusty working conditions, it is easy to cause the motor to malfunction, such as stalling, short-circuit, phase loss, and long-term overload causing insulation damage, which can cause the motor to burn out and endanger life safety, causing immeasurable losses. It is ...

AI Technical Summary

Problems solved by technology

In modern industrial and mining enterprises, electric motors account for more than 90% of the total power. Under dusty working conditions, it is easy to cause the motor to have faults such as stalled rotor, short circuit, phase failure, and long-term overload caused by insulation damage, which can cause the motor to burn out and endanger human safety, causing immeasurable losses. It is necessary to control and improve the safety performance of the motor in real time

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