A wide voltage power supply input circuit

A power input, wide voltage technology, applied in high-efficiency power electronic conversion, conversion of DC power input to DC power output, electrical components, etc., can solve the problems of high cost and slow start-up time, improve power factor, improve power factor , The effect of not easy to damage

Active Publication Date: 2020-06-09
NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a wide-voltage power supply input circuit to solve the problems in the prior art that a super-large-capacity electrolytic capacitor needs to be selected when wide-voltage input is required, resulting in high cost and slow start-up time

Method used

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  • A wide voltage power supply input circuit
  • A wide voltage power supply input circuit
  • A wide voltage power supply input circuit

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Embodiment Construction

[0026] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] At present, power terminals generally include three voltages of three-wire four-wire 57.7V / 100V, three-phase three-wire 100V, and three-phase four-wire 220V / 380V. When supplying power within a wide voltage range, it is necessary to be compatible with the above three rules at the same time. However, in the process of circuit design, it is necessary to consider both the demand for large capacity at single-phase low-voltage input and the demand for high withstand voltage of the capacitor at high-voltage input. Therefore, it is necessary to use a high-voltage electrolytic capacitor with a large capacity in the circuit. Multiple high-voltage electrolytic capacitors are connected in series or in parallel, which leads to an increase in cost...

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Abstract

The invention provides a wide-voltage power supply input circuit and relates to the technical field of power supply. The power input circuit includes a rectifier module, an APFC boost module, an electrolytic capacitor, a control circuit, and a low-voltage output circuit, and the rectifier module, an APFC boost module, an electrolytic capacitor, a control circuit, and a low-voltage output circuit are electrically connected in sequence. When the voltage rectified by the rectifier module is greater than the target value, it enters the overvoltage protection state, and when the rectified voltage is lower than the target value, it enters the boost state so that the voltage of the input electrolytic capacitor is greater than or equal to the target value. The wide-voltage power supply input circuit provided by the invention has the advantages of reduced cost, less failure and improved power factor of switching power supply.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a wide-voltage power supply input circuit. Background technique [0002] Switching power supply is the most important part of power terminal products. Traditional power terminals include three voltage supply specifications: three-wire four-wire 57.7V / 100V, three-phase three-wire 100V, three-phase four-wire 220V / 380V, usually according to different voltages Specifications design their respective power solutions. The wide voltage range input power supply must be compatible with the above three voltage specifications at the same time. [0003] At present, the power terminal is basically realized by a PWM debugging chip using a flyback transformer. However, due to the demand for large capacity of the capacitor at low voltage input, and the demand for high withstand voltage of the capacitor at high voltage input, it is necessary to choose a super large The capacity of the high-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/36H02M1/42H02M1/32H02M3/335
CPCH02M1/00H02M1/32H02M1/42H02M3/33561H02M3/33569H02M1/0087Y02B70/10
Inventor 戴银斌叶孟军李正午
Owner NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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