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Asymmetric control circuit suitable for resonant network semi-synchronous rectifier, and control method thereof

A technology of synchronous rectifier and resonant network, applied in the direction of control/adjustment system, instrument, electrical components, etc., can solve the problems of high cost, low diode efficiency, complex synchronous rectification control, etc., and achieve the effect of low cost and simple control

Active Publication Date: 2018-02-23
苏州卡方能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the use of diodes has disadvantages such as low efficiency, while the use of synchronous rectification has disadvantages such as complicated control and high cost.

Method used

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  • Asymmetric control circuit suitable for resonant network semi-synchronous rectifier, and control method thereof
  • Asymmetric control circuit suitable for resonant network semi-synchronous rectifier, and control method thereof
  • Asymmetric control circuit suitable for resonant network semi-synchronous rectifier, and control method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: as Figure 1-7 As shown, an asymmetric control circuit suitable for semi-synchronous rectifiers in resonant networks, including DC power supply, inverter, inductance-capacitor resonant network, synchronous signal sampling circuit, synchronous signal processing circuit, rectifier drive, DSP / MCU, semi-synchronous Rectifier, output filter circuit and battery;

[0023] The DC power supply is connected to the input terminal of the inverter, the output terminal of the inverter is connected to the input terminal of the inductor-capacitor resonance network, the output terminal of the inductor-capacitor resonance network is connected to the input terminal of the semi-synchronous rectifier, and the synchronous signal sampling circuit is sampled to obtain the output terminal of the inductor-capacitor resonance network The high-frequency current signal, the synchronous signal processing circuit converts the high-frequency current signal into a high-frequency voltage s...

Embodiment 2

[0032] Embodiment 2: Resonant Network Taking the bilateral LCC compensation network as an example, the simulation is carried out by using the software LTspice. Its simulation schematic diagram is as follows figure 2 , a schematic diagram of an asymmetric control circuit for a semi-synchronous rectifier based on a bilateral LCC resonant network, where U DC For 400V DC power supply, MOS tube S 1 , S 2 , S 3 and S 4 To form a full-bridge inverter, the series resonant inductor L f1 , parallel resonant capacitor C f1 , series resonant capacitor C 1 Constitute the transmitting side LCC resonant network, the transmitting coil is L 1 , the receiving coil is L 2 , the energy in L 1 and L 2 between the resonant transmission, the series resonant inductanceL f2 , parallel resonant capacitor C f2 , series resonant capacitor C 2 Constitute the receiving side LCC resonant network. Semi-synchronous rectifiers consist of diode D 1 and D 2 , MOS tube S 5 and ...

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Abstract

The invention relates to an asymmetric control circuit suitable for a resonant network semi-synchronous rectifier, and a control method of the asymmetric control circuit. The asymmetric control circuit comprises a DC power supply, wherein the DC power supply is connected to an input end of an inverter, an output end of the inverter is connected to an input end of an inductance-capacitance resonantnetwork, an output end of the inductance-capacitance resonant network is connected to an input end of the semi-synchronous rectifier, a synchronous signal sampling circuit samples to obtain a high-frequency current signal output by the inductance-capacitance resonant network, a synchronous signal processing circuit converts the high-frequency current signal into a high-frequency voltage signal, the synchronous signal processing circuit filters and amplifies the high-frequency voltage signal and then transmits the processed high-frequency voltage signal to a DSP / MCU, the DSP / MCU transmits a PWM signal to a rectifier driver, the rectifier driver is connected to the semi-synchronous rectifier, the semi-synchronous rectifier turns on a switching tube for rectification after receiving a driving signal, an output end of the semi-synchronous rectifier is connected to an input end of an output filtering circuit, and an output end of the output filtering circuit is connected with a battery. The asymmetric control circuit and the control method thereof have the advantages of simple control, low cost and high efficiency.

Description

technical field [0001] The invention relates to an asymmetric control circuit suitable for a resonant network semi-synchronous rectifier and a control method thereof, belonging to the technical field of resonant network control. Background technique [0002] As the resonant converter is more and more widely used in power electronic circuits, especially its resonant element resonates to make the voltage or current periodically cross zero, which prepares the conditions for the switching device to realize zero-voltage switching or zero-current switching. As power electronic converters tend to be characterized by high frequency, modularization, and miniaturization, efficiency is particularly important in converters. Like a DC-DC converter, its main components include a DC power supply, an inverter, a resonant network, a rectifying and filtering network, and a load. In terms of switching high frequency loss, the use of resonant network reduces switching loss and improves efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/36H02M1/088
CPCH02M1/088H02M1/36H02M3/33592H02M1/0058Y02B70/10
Inventor 李思奇舒文彬代维菊荣恩国罗淑龄龚泽威一
Owner 苏州卡方能源科技有限公司