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High-efficiency switching converter device and method

A switching conversion and boost converter technology, which is applied in the field of power transmission and transformation, can solve the problems of small load change frequency change range, low power factor, and large switching loss of the resonant loop of series-parallel resonant converters, and achieves wide input voltage. Range, low noise sensitivity, and the effect of enhancing dynamic response

Inactive Publication Date: 2018-07-06
HARBIN DONGZHUAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the flyback switching power supply is suitable for low power applications due to its low conversion efficiency and power factor; the forward switching power supply has improved efficiency and is suitable for small and medium power applications; the half-bridge and full-bridge hard switching power High, but the power factor is low and cannot meet the application occasions above medium power; the phase-shifted full-bridge converter has high efficiency, but it cannot realize soft switching in the full voltage range; the output of the series resonant converter is not adjustable without load, and the parallel resonant The resonant loop switching loss of the converter is large; the load change frequency of the series-parallel resonant converter has a small change range

Method used

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  • High-efficiency switching converter device and method

Examples

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Embodiment 1

[0020] High-efficiency switching conversion method, the auxiliary power supply adopts a flyback topology, and the chip VIPER22A is a switching device with current control mode pulse width modulation. It integrates a switching tube and a control chip with a wide input voltage range and low standby power consumption. , higher voltage start-up characteristics, and has very complete protection functions such as over-current, over-voltage, under-voltage and over-temperature. Its boost converter control chip is UCC28019, which uses PWM boost circuit. Sampling control of output voltage, sampling control of input voltage, and control method of synchronous input voltage with input current. The power factor reaches 0.995, the total harmonic distortion rate is less than 3%, the noise sensitivity is small, the starting current is low, and it has soft start, undershoot Complete protection functions such as voltage lock, input power-down protection, output overvoltage protection, open-loop p...

Embodiment 2

[0022] The equipment used in the high-efficiency switching conversion method comprises: AC input terminals, the AC input terminals 1 are electrically connected to the boost converter 2 and the auxiliary power supply 5, and the boost converter is electrically connected to A resonant converter 3, the resonant converter is connected to the output terminal 4, the auxiliary power supply is respectively connected to the boost converter control circuit 6 and the resonant converter control circuit 7, and the boost converter control circuit is respectively connected to the step-up converter A voltage converter and a resonant converter control circuit, the resonant converter control circuit is connected to the resonant converter.

[0023] Example 2:

[0024] According to the equipment used in the high-efficiency switching conversion method described in Embodiment 1, the auxiliary power supply is in a flyback control mode, and the control chip adopts a VIPER22A integrated with a PWM cont...

Embodiment 3

[0026] According to the equipment used in the high-efficiency switching conversion method described in Embodiment 1, the switching tube MOSFET of the boost converter is 20N605S of Infineon, and the inductance of the boost converter is a sendust magnetic ring 47 *24*18 enameled wire self-winding, the boost converter control circuit chip is UCC28019 of TI company, the switching tube MOSFET of the resonant converter is W20NB50 of ST company, the high frequency of the resonant converter The transformer is self-winding with ferrite core EE42 enameled wire. The leakage inductance of the resonant converter is self-winding with 39.9*24.1*14.5 enameled wire. The control circuit chip of the resonant converter is ST company. The L6599N.

[0027] All of its circuits are connected by wires, and those with the same names and labels in each figure are connected together; refer to the attached figure 1 , the AC voltage of 70V~265VAC is used as the input of the boost converter 2 and the auxil...

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Abstract

The invention discloses a high-efficiency switching converter device and method. A conventional switching converter cannot meet the requirements of the green and environment and high efficiency because of the lower efficiency and power factor. According to the method, an auxiliary power supply employs a flyback-type topological structure, and a chip VIPER22A is a current-control-mode pulse width modulation switching device, integrates a switching tube and a control chip, and is wider in input voltage range, lower in standby power consumption and higher in start voltage. Moreover, the chip VIPER22A has the complete functions of overcurrent, overvoltage, undervoltage and overtemperature protection, and a boost converter control chip is UCC28019. A boost circuit employing a PWM and a built-inmultiplier can be used for the sampling control of an output voltage, the sampling control of an input voltage and the control of the synchronization of the input current and input voltage. The powerfactor reaches 0.995, and the total harmonic distortion is less than 3%. The invention relates to the field of power transmission and transformation, and is especially applied to a high-efficiency switching converter device and method.

Description

Technical field: [0001] The invention relates to the field of power transmission and transformation, in particular to a high-efficiency switching converter device and method. Background technique: [0002] At present, the flyback switching power supply is suitable for low power applications due to its low conversion efficiency and power factor; the forward switching power supply has improved efficiency and is suitable for small and medium power applications; the half-bridge and full-bridge hard switching power High, but the power factor is low and cannot meet the application occasions above medium power; the phase-shifted full-bridge converter has high efficiency, but it cannot realize soft switching in the full voltage range; the output of the series resonant converter is not adjustable without load, and the parallel resonant The resonant loop switching loss of the converter is large; the load change frequency of the series-parallel resonant converter has a small change ran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M7/48H02M3/155
CPCH02M3/155H02M3/33523H02M7/48H02M7/4818Y02B70/10
Inventor 王冠红
Owner HARBIN DONGZHUAN TECH
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