Energy-saving type motor control system based on field-effect transistor common source amplifying circuit

Abstract

The invention discloses an energy-saving type motor control system based on a field-effect transistor common source amplifying circuit. The system comprises a motor (5), a control system (2), a voltage detection device (1), a motor protecting system (3), a frequency converting control system (4), a dynamic power correction circuit (7) and a harmonic cancellation device (6) connected with the frequency converting control system (4), wherein the voltage detection device (1) is connected with the control system (2); the motor protecting system (3) is connected with the voltage detection device (1); the frequency converting control system (4) and the dynamic power correction circuit (7) are connected with the motor (5); the control system (2) is connected with an outside power grid, the frequency converting control system (4) sequentially passes by an amplifier P1 and a capacitor C1 and is connected with a control system (2), the motor protecting system (3) is further connected with the motor (5), and the harmonic cancellation device (6) and the dynamic power correction circuit (7) are both connected with the control system (2). The common source amplifying circuit is adopted for amplifying a signal of the system, and the system has the characteristics of good thermal stability, high radiation resistance capability, small noise factor and the like.

Description

technical field [0001] The invention relates to the field of electronics, in particular to an energy-saving motor control system based on a field effect tube common source amplifying circuit. Background technique [0002] At present, energy conservation and emission reduction and environmental issues have become the focus of people's increasing attention. With the gradual implementation of the national energy conservation and emission reduction plan, industrial enterprises are trying various methods to reduce energy consumption in various new or reconstruction projects. The motor is the main power device of industrial enterprises, and it is widely used in various working conditions. According to relevant data, various electric motors consume the most energy in industrial enterprises. The power consumption of motors in my country accounts for 60% of the country's power consumption. %-70%, in order to meet the requirements of energy saving and emission reduction, all enterprise...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the defect of low stability of the current motor control system, and provide an energy-saving motor control system based on a field effect tube common source amplifier circuit

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