Inverter circuit for backup power source of fire resisting shutter

Abstract

The invention discloses an inverter circuit for a backup power source of a fire resisting shutter. The inverter circuit for the backup power source of the fire resisting shutter comprises an oscillating circuit, a rectifying circuit, a charging and discharging circuit and an output control circuit, wherein an integrated vibration chip is used as a vibration source, and controls a high frequency transformer to vibrate through a field effect tube, and the high frequency transformer outputs high voltage and generates direct current square wave voltage through high frequency rectification. According to the inverter circuit for the backup power source of the fire resisting shutter, the high frequency transformer outputs the high voltage by using various coil combinations, and generates 380V static direct current pulse voltage, 100V static direct current pulse voltage and 63V static direct current pulse voltage after rectification so as to charge a capacitor, the capacitor is restarted to output electricity after delay when voltage of the capacitor reaches 380V, a momentary discharge function of the capacitor is used to release high voltage pulses, difference time action is started and output, 380V brake contracting action is started, and then the 380V brake contracting action is kept through middle voltage and low voltage, and therefore the inverter circuit for the backup power source of the fire resisting shutter is long in life, small in noise, low in cost and high in security, can be used in an alternating current 380V electromagnet, and solves the problems that a high power motor backup power source starting module is high in cost and low in reliability, and easily burns a coil.

Description

technical field [0001] The invention relates to a fireproof roller shutter, in particular to an inverter circuit for a backup power supply of a fireproof roller shutter, and belongs to the field of electronic technology. Background technique [0002] When the main power supply is cut off, the fire shutter controller uses 12v backup battery to supply power, which is converted into DC 220v through the inverter circuit, and supplies the motor brake electromagnet to open the fire shutter brake device, so that the shutter will fall by its own weight and start up. When it comes to the fire shutter, it can realize the function of fire partition in case of power failure. [0003] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: the mass of the fireproof roller shutter motor in the prior art is between 600kg-1500kg, and the brake structure of the motor is usually opened by a DC (220v) electromagnet ...

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide an inverter circuit for the backup power supply of fire shutters, which overcomes the fact that the existing DC 220v inverter power supply cannot open the 380v brake, and the AC electromagnet is noisy and prone to heat , the defect of short service life, adopting the inverter circuit of the present invention, on the one hand, it can be normally applied to AC 380v electromagnet, and has the advantages of low noise, constant current, long life, simple structure and low cost

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