Industrial uninterrupted seamless switching inverter power supply device for solving voltage sag problem

Abstract

The invention provides an industrial uninterrupted seamless switching inverter power supply device for solving a voltage sag problem. The device includes a power supply circuit, an isolation samplingcircuit, a super capacitor group circuit, an RS485 serial communication interface circuit, a CAN bus serial communication interface circuit, a precise full-wave rectification and operational amplification circuit, a data storage circuit, an electromagnetic relay driving circuit, an active low voltage fast AC switching circuit, an H-bridge inverter output circuit, a PWM boosting circuit and a transformer boosting circuit, wherein the power supply circuit includes an AC-DC voltage reduction circuit and a DC voltage stabilizing circuit. The device is advantaged in that the switching speed is fast, the MOSFET fast switching capability is utilized to make the switching time of the power supply to be within 1MS, the device has good versatility, long service life, small size, convenient installation and flexible use, and the key equipment can be protected pertinently.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to an industrial uninterrupted seamless switching inverter power supply device for solving the voltage sag problem. Background technique [0002] During the operation of the power system in the factory, due to lightning strikes, short-circuit to ground, fault reclosing, backup power self-switching, abnormal power grid, large-scale equipment start-up, etc., the power grid voltage will drop instantaneously and then return to normal. The phenomenon of large instantaneous voltage fluctuation or recovery from power failure is called voltage sag phenomenon, also known as swaying electricity. [0003] The electric shock phenomenon is catastrophic for enterprises that require a large number of equipment in the process of continuous production to prevent the motor from tripping and shutting down. The slightest is economic loss and reduced production efficiency, and the severest ...

AI Technical Summary

Problems solved by technology

[0003] The swaying phenomenon is catastrophic to enterprises that require a large number of equipment in continuous production and does not allow the motor to trip and shut down in the process. The slightest is economic loss and reduced production efficiency. The severest is fire, explosion and even personal safety.

There are many uninterruptible power supply devices in the prior art, but they are all large in size, slow in charging and discharging, short in life, slow in switching speed, and poor in versatility

Images