Intelligent power saver for motors

Abstract

The invention discloses an intelligent power saver for motors, comprising: a direct current voltage stabilizing circuit, a pulse width modulation circuit, a half-bridge drive circuit and a high frequency isolation transformer circuit. The direct current voltage stabilizing circuit contains a transformer, a bridge rectifier circuit, a filter capacitor, a current limiting resistor and Zener diode. The pulse width modulation circuit includes a chip TL494CN, whose pin 8 is connected with the anode of the Zener diode, and whose pin 9 and pin 10 serve as the output end of a drive signal. The half-bridge drive circuit includes a first field effect transistor and a second field effect transistor. The G pole of the first field effect transistor is connected with the pin 9 of the chip TL494CN, and the G pole of the field effect transistor Q2 is connected with the pin 10 of the chip TL494CN; the D poles of the first field effect transistor and the second field effect transistor are connected with the input end of the high frequency isolation transformer circuit respectively.

Description

technical field [0001] The invention relates to a power saver, more specifically, the invention relates to a motor intelligent power saver. Background technique [0002] Motor saver is to adjust the input power of the motor at any time according to the load rate of the motor without changing the rated speed of the motor, so as to ensure the stable operation of the motor at the optimal load rate and reduce the copper loss, iron loss and stray energy of the motor. Loss and additional loss, so that the life of the motor is extended, but also greatly improve the operating efficiency of the motor, thereby achieving the purpose of saving electricity. At present, compared with developed countries, domestic motors generally have lower operating efficiency. This is because considering factors such as grid voltage fluctuations, equipment overload, and mechanical wear, 30% of the power margin is generally reserved when selecting motor equipment. . However, these devices rarely reach ...

AI Technical Summary

Problems solved by technology

These devices often have a low load rate, low operating efficiency, and the waste of electric energy is staggering.