Gapless automatic switching device for intelligent dual direct-current power supply

Abstract

The invention belongs to the field of automation and control engineering, and in particular relates to a gapless automatic switching device for an intelligent dual direct-current power supply with a power supply state monitoring function. The gapless automatic switching device consists of a resistor, a light emitting diode, a diode, a voltage stabilizing tube, a voltage comparator, a field effect tube, a high-precision high-current power switch, a reverser, a microcontroller and a controller area network (CAN) transceiver. By using the gapless automatic switching device, a power supply is switched without a gap, so that a direct current is provided uninterruptedly. A control part adopts an enhanced metal-oxide-semiconductor field-effect transistor (MOSEFT) as a voltage for driving, so that power consumption of an original system is not increased basically when the gapless automatic switching device works. After a switching action is finished, an auxiliary power supply supplies power to equipment through the high-precision high-current power switch, so that the energy loss is extremely low. The aim of remotely monitoring the working state of the power supply can be fulfilled by programming the microcontroller and by the transmission function of the CAN transceiver. Therefore, the invention has the advantages that the gapless automatic switching device is high in efficiency, simple and reliable in circuit, low in cost and energy consumption, high in adaptability, and favorable to remote monitoring.

Description

technical field [0001] The invention belongs to the field of automation control engineering, and in particular relates to a seamless automatic switching device for dual direct current power supplies with a power supply state monitoring function. Background technique [0002] With the development of science and technology and the application of high-end precision devices, higher requirements are placed on power quality and power supply reliability. For important occasions such as hospitals, shopping malls, banks, chemicals, high-rise buildings, military facilities, and fire protection, two-way power supplies are required. To ensure the reliability of the power supply, especially in the above special occasions that involve equipment in the field of automation and control engineering, it is even more necessary to equip two or even multiple power supplies, and a device that can perform reliable conversion between the two power supplies to ensure The power supply is uninterrupted...

AI Technical Summary

Problems solved by technology

The backup power has the following problems: (1) It takes a certain amount of time to switch, which may cause the device to restart; (2) Most of the backup power is powered by batteries, which need to be tested and replaced regularly, and the cost is high; 2. Online Mode: the backup power supply is always connected to the device, but its output voltage is slightly lower than the external power supply, so when the external power supply is normal, the backup power supply cannot output power to the device, and when there is a power failure or the external power supply voltage is insufficient, the backup power supply will Device power supply

Its shortcoming is that one of the two-way power supplies of this circuit is powered by a storage battery, which has the problems of insufficient service life, long-term power supply capacity, and cumbersome management of battery charging and discharging, and cannot realize real-time monitoring of the power supply of the two-way power supply function, due to the existence of relays, the purpose of seamless switching between two power supplies cannot be fully achieved

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