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Voltage-multiplying rectifying circuit

A voltage doubling rectifier circuit and voltage doubling circuit technology, which is applied in the direction of electrical components, adjusting electrical variables, and conversion equipment with intermediate conversion to AC, can solve the problems of affecting the output voltage and no control, so as to reduce the number of turns and improve The selection of withstand voltage and the effect of improving EMI characteristics

Active Publication Date: 2007-11-21
BEIJING SUPLET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned circuit is originally used to double the voltage of the sinusoidal alternating current, the input voltage directly affects the output voltage, and there is no room for control

Method used

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] As shown in Fig. 5, a voltage doubler rectifier circuit of the present invention includes a transformer, a C-W voltage doubler circuit and a PWM control circuit. Transformer primary differential terminal connected to power supply input V in , the primary end of the transformer with the same name is connected to the drain of the switch tube Q1; the output of the PWM control circuit is connected to the gate of the switch tube Q1, and the source of the switch tube Q1 is connected to the ground; the secondary of the transformer is connected to the C-W second-order voltage doubler circuit. The C-W voltage doubler circuit in the second-order voltage doubler rectifier circuit includes capacitors C1, C2, C3 and C4, diodes D1, D2, D3 and D4, wherein one pin of the capacitor C1 is connected to the cathode of the diode D1 and the anode of the diode D2, The...

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Abstract

The invention comprises: a transformer, a C-W voltage doubling circuit and a PWM control circuit. The unlike terminal of primary of transformer is connected to the power input Vin; the like terminal of primary of transformer is connected to the drain electrode of the switching tube Q1; the output of the PWM is connected to the grid electrode of the switching tube Q1; the source electrode of the switching tube Q1 is grounded; the secondary of the transformer is connected to the C-W doubling circuit. The invention uses a single-ended fly-back PWM to make control, which outputs the forward voltage by the way such that the fly-back voltage and forward voltage can be overlapped repeatedly at the secondary so as to release a switch power circuit with high voltage output.

Description

technical field [0001] The invention relates to a power supply circuit, in particular to a voltage doubling and rectifying power supply circuit. Background technique [0002] At present, the high-voltage doubler rectifier circuit based on the charge pump was proposed by COCCROFT and WALTON in 1932, and it is usually called the C-W doubler rectifier circuit. A common topology is shown in Figure 1, in which the secondary rectifier and charge pump capacitors can be added repeatedly as shown in the figure to make the output voltage higher and higher. If you reverse all the diodes, the output voltage polarity will be reversed. Usually every 2 times is called the first order, and the above-mentioned 4 times voltage rectification circuit is the second order. [0003] When the secondary output of the transformer is negative at the top and positive at the bottom, the current flow is shown in Figure 2. The transformer secondary charges two capacitors on the upper arm. [0004] Whe...

Claims

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Application Information

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IPC IPC(8): H02M7/10H02M3/28H02M3/335
Inventor 卢作烜李小宇
Owner BEIJING SUPLET