Non-harmonic sinusoidal wave power correction power saving control device

Abstract

The invention provides a non-harmonic sinusoidal wave power correction power saving control device for three-phase motor intelligent adjustment non-harmonic power factor correction. The voltage waveform, the current and the active power of the motor load are detected in real time and the load size and variation are analyzed so that online detection of tracking of the motor load can be realized, and the output power of the motor is enabled to be matched with the load power consumption. When the output torque is low, the no-load loss is high and the efficiency is low when the motor is no-load orlight-load, the output current and voltage and the power factor are adjusted online so that the output power and the load are enabled to be constantly in the balanced state; when the load of the motor increases, the power saving device controls the output power to be increased so as to ensure that the output power is balanced again. The motor is enabled to stably work without harmonic waves by online detection and control, the excess electric energy consumption of the motor can be reduced without changing the power supply frequency and unnecessary waste can be suppressed so that the objectiveof power saving can be realized and the service life of the motor can be prolonged.

Description

technical field [0001] The invention relates to a non-harmonic sine wave power factor correction energy-saving device that adjusts the output power on-line as the load of the motor changes, especially an on-line detection and control that makes the motor work stably, improves efficiency, and suppresses unnecessary power waste. Harmonic sine wave power correction power saving control device. Background technique [0002] At present, in the article "Research and Application of Motor Load Regulation Device" in the well-known "National Science and Technology Information Service Network-Henan Node": "The motor load regulation control device is based on the dynamic tracking of the motor load, and timely detects the load of the motor. , by constantly detecting and controlling the power factor, voltage and current of the motor, analyzing the load size and change trend, calculating the optimal voltage and current for the asynchronous motor, and controlling the asynchronous motor by q...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the existing motor load adjustment control device using a thyristor with a large internal resistance and voltage drop, its own loss is large, a large number of harmonics will be generated during the trigger conduction process, it is not suitable for high-power motors, the detection rate and response speed are slow, The motor with a sudden increase in load produces a sudden sudden change in current that affects the service life of the motor. The present invention provides an aharmonic sine wave power correction and energy saving control device. The aharmonic sine wave power correction and energy saving control device is not only applicable to various It is a three-phase asynchronous motor with various powers, and adopts direct and indirect dual control methods to suppress the harmonic components in the AC sine wave and improve the power factor. When the motor and the supply current are constantly matched, there will be no instantaneous sudden change of current, reducing its own loss and improving power saving. efficiency

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