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Unsaturation-type stabilized switching power supply based on phase sensitive detection circuit

A switching regulated power supply, phase-sensitive detection technology, applied in electrical components, output power conversion devices, conversion equipment with intermediate conversion to AC, etc., can solve the problem of low stability coefficient, reduce radio frequency interference, stability High, the effect of overcoming the delay effect

Inactive Publication Date: 2015-10-07
CHENGDU JIESHENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the stability coefficient of the current switching regulated power supply is not high, and to provide an unsaturated switching regulated power supply based on a phase-sensitive detection circuit

Method used

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  • Unsaturation-type stabilized switching power supply based on phase sensitive detection circuit
  • Unsaturation-type stabilized switching power supply based on phase sensitive detection circuit

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Embodiment

[0023] Such as figure 1 As shown, the present invention includes a diode rectifier U, a power amplifier P1, a transformer T, a switch filter circuit, a power supply output circuit, a variable voltage feedback circuit, a PWM controller, a sliding regulator, a nonlinear negative feedback circuit and a phase sensitive detection circuit . Wherein, the transformer T is composed of a primary coil L1 disposed on the primary side, a secondary coil L2 disposed on the secondary side, and a secondary coil L3 disposed on the secondary side. In the present invention, a sliding tap is provided on the primary coil L1 of the transformer T, and the sliding tap is controlled by a sliding regulator to ensure that the primary coil L1 of the transformer T is adjusted according to the duty ratio of the PWM controller. The turns ratio between the secondary coil L2 and the secondary coil L3.

[0024] The input terminal of the diode rectifier U is used to connect to the 220V mains, and the switch fi...

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PUM

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Abstract

The invention discloses a nonlinearity negative-feedback unsaturation stabilized switching power supply. The nonlinearity negative-feedback unsaturation stabilized switching power supply is characterized by being mainly composed of a diode rectifier U, a power amplifier P1, a transformer T, a switch filter circuit, a power output circuit, a transformation feedback circuit, a nonlinearity negative-feedback circuit, a PWM controller and the like, the switch filter circuit is connected between the diode rectifier U and the power amplifier P1 in series, the power output circuit is connected with an auxiliary side coil L2 of the transformer T, the transformation feedback circuit is connected with an auxiliary side coil L3 of the transformer T, the nonlinearity negative-feedback circuit is connected with the transformer feedback circuit, and the PWM controller is connected with the power amplifier P1. The nonlinearity characteristic of the nonlinearity negative-feedback circuit is utilized, an adjusting tube is automatically located on the edge of a saturation area, the circuit and external radio-frequency interference is effectively reduced, the circuit structure is greatly simplified, and the manufacturing cost and the maintaining cost are greatly reduced.

Description

technical field [0001] The invention relates to a switch stabilized voltage power supply, in particular to an unsaturated switch stabilized voltage power supply based on a phase sensitive detection circuit. Background technique [0002] With the continuous advancement of science and technology, electronic products have brought great convenience to people's life while their functions are becoming more and more powerful. The voltage stabilizing circuit is easy to operate. The traditional series linear regulating voltage stabilizing circuit has the characteristics of high stability, adjustable output voltage, small ripple coefficient, and simple circuit. However, the adjustment tubes of these series linear adjustment type voltage regulator circuits always work in the amplified state, and current flows all the time, so the power consumption of the tubes is relatively large, and the efficiency of the circuit is not high, generally only reaching 30% to 50%. %about. In order to o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M3/28
CPCH02M7/219H02M7/2195H02M7/4803
Inventor 雷明方
Owner CHENGDU JIESHENG TECH CO LTD
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