Self-adaptive load following control technical system

Abstract

The invention discloses a self-adaptive load following control technical system, which has a power main circuit and a control part, wherein the control part is an external control interface which is connected with a digital signal processor (DSP) module. The DSP module is connected with an output control module and a display and control unit module. The technical system can be used for developing and manufacturing power-saving control equipment which is applicable to different loads of various three-phase asynchronous motors; and when connected in series between a power supply and the three-phase asynchronous motor, the technical system can perform self-adaptive following energy-saving control according to the change situation of the real-time load in a process that the motor drags the load at a constant speed, so the active voltage and the active current consumed by the operation of the motor synchronously follow according to requirements, the active consumption during the operation of the motor is reduced, and the reactive power is reduced to the limit, power factors of the motor are improved and the energy-saving limit of the equipment is reached; the comprehensive power-saving efficiency can reach 15 to 17 percent; the loss of iron and copper can be effectively reduced, the heat amount of the motor is reduced, and the service life of the motor of the equipment of the kind can be prolonged due to soft stop and soft start functions.

Description

technical field [0001] The invention belongs to various load energy-saving control special technologies using three-phase asynchronous motors, and in particular relates to an adaptive load follow-up control technology system. Background technique [0002] Since the starting torque of the three-phase asynchronous motor under various load conditions is large in power frequency operation, and the power consumption is reduced during normal operation, the user can only choose a motor with a larger than normal rated power to solve the problem of large starting torque, which is As a result, the motor load is small after normal operation, and it is often in a light-load or no-load state in actual operation. Almost 100% of them have the phenomenon of "big horse-drawn carts", resulting in very low power factor of the power system and serious reactive power loss of the motor. There is a large amount of waste of electric energy. [0003] The current energy-saving means mainly rely on t...

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Problems solved by technology

[0002] Since the starting torque of the three-phase asynchronous motor under various load conditions is large in power frequency operation, and the power consumption is reduced during normal operation, the user can only choose a motor with a larger than normal rated power to solve the problem of large starting torque, which is As a result, the motor load is small after normal operation, and it is often in a light-load or no-load state in actual operation. Almost 100% of them have the phenomenon of "big horse-drawn carts", resulting in very low power factor of the power system and serious reactive power loss of the motor. There is a lot of wasted energy

[0003] The current energy-saving means mainly rely on the inverter to save energy, and the inverter can only work on the premise of changing the speed of the load, and many loads are not allowed to change the speed, so the inverter is powerless.

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