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Power supply device with monitoring function

A power supply device and functional technology, applied in the direction of circuit devices, electrical components, etc., can solve problems such as damage and damage to switching power supplies

Active Publication Date: 2013-10-16
SUZHOU EMK ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the wiring process, it is easy to make mistakes at the access end, and the mains 220V AC is mistakenly connected to the two phases of the three-phase 380V AC, or the neutral line of the 220V AC is disconnected from the center, which will cause some power consumption of the mains supply. The equipment is damaged due to high voltage intrusion; at the same time, if the 220V AC input terminal is mistakenly connected to the two phases of 380V AC, the switching power supply will be damaged

Method used

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  • Power supply device with monitoring function

Examples

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Effect test

Embodiment 1

[0017] Embodiment one: see figure 1 As shown, a power supply device with monitoring function includes AC input terminals: two phases of R phase and S phase in 380 volts AC and neutral line N to provide two voltage inputs of 380 volts and 220 volts; switching power supply, 220 volts A volt AC output terminal and a DC output terminal, the output of the switching power supply is connected to the DC output terminal, and the switching power supply includes a PWM drive unit and a DC voltage high-frequency power conversion unit; the 380 volt AC two-phase input terminal is passed through a rectifier circuit and a filter circuit Then connect the PWM drive unit, the DC voltage high-frequency power conversion unit and the voltage undervoltage detection circuit; one of the phase input terminals and the neutral line input terminal of the 380-volt AC are connected to the 220-volt AC output through the output circuit of the relay or contactor terminal; the 220-volt AC voltage is rectified an...

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Abstract

The invention discloses a power supply device with monitoring function. The power supply device comprises an alternating-current input end, a switching power supply, a 220V alternating-current output end and a direct-current output end, wherein the output of the switching power supply is connected with the direct-current output end. The power supply device is characterized in that: the alternating-current input end consists of a 380V alternating-current two-phase input end and a zero line input end; and the output of the switching power supply is controlled by under-voltage detection after the 380V alternating current is rectified and filtered and over-voltage detection after the 220V alternating current is rectified and filtered, and the 220V alternating-current output is controlled by a relay or a contactor at the same time, so that the power supply is monitored. A 380V-220V large transformer is not needed in the power supply device, so that metal materials such as copper wires and silicon steel plates can be saved, and energy conservation and emission reduction are realized; and through an internal monitoring circuit, the mains 220VAC electric equipment is protected from being damaged during error connection.

Description

technical field [0001] The invention relates to a power supply device, in particular to a power supply device which monitors input power and provides commercial power and DC output. Background technique [0002] The electric control cabinet usually needs to provide 380VAC, 220VAC, DC voltage (such as 24VDC, 12VDC, 5VDC, select the output according to the need), etc. to supply power to the load electrical equipment. [0003] In the prior art, the methods for realizing the above-mentioned power supply mainly include: ①The electric control cabinet is only connected to the three-phase 380V AC, and the 380V AC is changed to 220V AC through the transformer, and then the 220V AC electrical equipment is connected to the secondary side of the transformer (output side ). Use this method to solve the problem of 220V AC voltage power supply, and then output DC voltage through 220VAC switching power supply (such as 24VDC, 12VDC, 5VDC, select the output according to your needs). This me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J13/00
Inventor 禹世源
Owner SUZHOU EMK ELECTRONICS
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