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Three-level power source with dual mains input

A three-level, power supply technology, applied in the field of power supply, can solve the problems of unstable power supply frequency and input voltage of generators, large ripples, etc., and achieve the effects of convenient observation, reduced energy consumption, and reduced cable burden

Inactive Publication Date: 2018-12-07
FOSHAN SANCHUANG KNITTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the input voltage of the existing dual mains is the input voltage of the generator, because the power supply frequency and input voltage of the generator are unstable, and the ripple is relatively large

Method used

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  • Three-level power source with dual mains input
  • Three-level power source with dual mains input
  • Three-level power source with dual mains input

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The present invention provides Figure 1-3 The illustrated three-level power supply with dual mains input includes a control unit 1. The control unit 1 includes a photocoupler 2 and a control PCB 3, and the photocoupler 2 includes a photosensitive unit 4 and a diode 5. The output end of the control unit 1 is provided with a first power supply 6 and a second power supply 7. The first power supply 6 includes a mains power 8 and a rectifier 9, and the first power supply 6 includes a generator power supply unit 15 and a filter unit 10. The output end of the control unit 1 is provided with a three-level inverter 11, the output end of the three-level inverter 11 is provided with a load 12, the output end of the photocoupler 2 is provided with a CPU13, and the output end of the CPU13 is provided with a display Unit 14, specifically:

[0024] The rectifier 9 facilitates the conversion of AC power generated by the mains 8 and generator power supply unit 15 into DC power;

[0025] T...

Embodiment 2

[0030] The mains 8 is electrically connected to the rectifier 9. The AC generated by the mains 8 is converted into DC after being converted by the rectifier 9, which is convenient for providing DC power to electronic equipment. Both the rectifier 9 and the generator power supply unit 15 are connected with a photocoupler 2 Electrical connection, which facilitates the complete transmission of the direct current by the photocoupler 2 and avoids electromagnetic interference.

[0031] The photocoupler 2 and the control PCB 3 are electrically connected to the CPU 13, and the control PCB 3 controls the CPU 13 to turn off the power connected to the second power supply 7 or the second power supply 6 to achieve the control effect on the input voltage. The display unit 14 and the CPU 13 Electrically connected, the display screen will display the voltage generated by the CPU13, which is convenient to observe whether the passed voltage exceeds the threshold voltage set by the CPU13. The adjust...

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Abstract

The invention discloses a three-level power source with dual mains input. The three-level power source comprises a control unit, wherein the control unit comprises a photoelectric coupler and a control PCB, wherein the photoelectric coupler comprises a photosensitive unit and a diode, an output end of the control unit is provided with a first power supply and a second power supply, the first powersupply comprises the mains and a rectifier, the second power supply comprises a power generator power supply unit and a filtering unit, and the output end of the control unit is provided with three-level inverters. The three-level power source is advantaged in that through setting the display unit, when the output voltage of the first power supply is smaller than the threshold voltage, the AC isgenerated through operation of the power generator power supply unit, a filtering capacitor is mainly used for filtering the AC generated by the power generator power supply unit, after the AC frequency greater than the filtering capacitor is filtered, the AC after filtering is stabilized by a voltage stabilizer, so the filtered AC can be directly rectified by the rectifier, when the first power supply is the same as the threshold voltage, the power generator power supply unit stops working.

Description

Technical field [0001] The present invention relates to the technical field of power supplies, in particular to a three-level power supply with dual mains input. Background technique [0002] Dual mains: one mains is called the main AC power supply and supplies power to the rectifier; the other mains is called the bypass AC power supply, which supplies power to the automatic bypass and maintenance bypass of the UPS; under normal circumstances, the main AC power supplies power to the rectifier , Supply power to the charger, establish a DC bus, and then the DC bus to the inverter, and then the inverter to supply power to the load, when the inverter fails or overloads, the load will be switched with bypass AC The power supply continues to supply power to the load from the bypass AC power supply. [0003] However, the input voltage of the existing dual mains is the input voltage of the generator. Because the power supply frequency and input voltage of the generator are unstable, the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J9/08
CPCH02J9/08H02J3/0073
Inventor 罗建华
Owner FOSHAN SANCHUANG KNITTING CO LTD
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