Fast-response soft-switching isolation inverter and method

A fast-response, soft-switching technology, applied in irreversible DC power input into AC power output, output power conversion devices, AC power input into DC power output and other directions, can solve the problem of slow instantaneous response speed, etc. Achieve the effect of fast response speed, easy control method and friendly human-computer interaction interface

Pending Publication Date: 2018-02-23
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the instantaneous response speed of the traditional inverter is slow

Method used

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  • Fast-response soft-switching isolation inverter and method
  • Fast-response soft-switching isolation inverter and method
  • Fast-response soft-switching isolation inverter and method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0042] A fast-response soft-switching isolated inverter such as figure 1 As shown, it includes DC input circuit 1, DC filter circuit 2, buffer resonance circuit 3, high frequency conversion circuit 4, fast response inverter circuit 5, output low-pass filter circuit 6, load circuit 7, first sampling circuit 8, MCU The control circuit 9, the drive circuit 10 of the switch tubes Q2 and Q3, the drive circuit 11 of the switch tube Q1, the second sampling circuit 12 and the touch display screen 13; the DC input circuit 1 is sequentially connected to the DC filter circuit 2 and the buffer resonance circuit 3. High-frequency conversion circuit 4, fast response inverter circuit 5, output low-pass filter circuit 6 and load circuit 7, the load circuit 7 is connected to the MCU control circuit 9 through the first sampling circuit 8, and the MCU control circuit 9 passes through The driving circuit 10 of the switching tubes Q2 and Q3 is connected to the fast response inverter circuit 5, the...

specific Embodiment approach 2

[0045] Specifically, as figure 2 As shown, the fast-response soft-switching isolated inverter, the DC input circuit 1 is a power supply DC.

[0046] Specifically, the fast-response soft-switching isolation inverter, the DC filter circuit 2 is a filter circuit with capacitors and choke coils, and the DC filter circuit 2 includes a conjugate coil L3 and a DC filter capacitor C3; The positive and negative poles of the DC power supply are connected to the conjugate coil L3, and the conjugate coil L3 is connected to the DC filter capacitor C3.

[0047] Specifically, in the fast-response soft-switching isolated inverter, the buffer resonant circuit 3 includes a diode D1, a diode D2, a resonant capacitor C1 and a resonant inductance L1; the resonant capacitor C1 is respectively connected to a DC filter capacitor C3 and The resonance inductor L1, the DC filter capacitor C3 is connected to the cathode of the diode D1, the resonance inductor L1 is connected to the cathode of the diode...

specific Embodiment approach 3

[0063] As a further improvement of the invention, the fast-response inverter circuit 5 adopts a hysteresis comparison method, so that the voltage waveform output by the fast-response inverter circuit 5 can be controlled by tracking the command signal, specifically, it can be controlled according to command signals of different frequencies , to output voltages with different frequencies; it is also possible to output voltages with different waveforms according to command signals of different waveforms.

[0064] In the present invention, the buffer resonant circuit 3 is used as the buffer circuit on the primary side of the high-frequency energy storage transformer T1. The buffer resonant circuit 3 involved can realize soft start and shutdown of the switching tube Q1 according to the resonance principle, and the circuit loss is significantly reduced. ; The fast-response inverter circuit 5 is connected to the load circuit 7 through the output low-pass filter circuit 6, and the outp...

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PUM

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Abstract

The invention discloses a fast-response soft-switching isolation inverter and a method, and belongs to the field of inverters. The device comprises a direct current input circuit, a direct current filter circuit, a buffer resonant circuit, a high-frequency conversion circuit, a fast response inversion circuit, an output low-pass filter circuit and a load circuit; the direct current input circuit is sequentially connected with the direct current filter circuit, the buffer resonant circuit, the high-frequency conversion circuit, the fast response inversion circuit, the output low-pass filter circuit and the load circuit, the load circuit is connected with an MCU control circuit through a first sampling circuit, and the MCU control circuit is connected with the fast response inversion circuitthrough driving circuits of switch tubes Q2 and Q3 and connected with the high-frequency conversion circuit through a driving circuit of a switch tube Q1. The method comprises the steps that on the original edge of a high-frequency transformer, the voltage and current of the power switch tube Q1 are both changed into zero in an LC resonant mode when the power switch tube Q1 is switched on and switched off, the soft switching action state of the power switch tube Q1 is kept, and the switch-on and switch-off losses of the power switch tube Q1 are reduced; on the subsidiary side of the high-frequency transformer, by controlling the power switch tubes Q2 and Q3 to be switched on and switched off, compared with existing inverters, the inverter has the advantages of being low in circuit loss, fast in load instantaneous response, high in intelligentization degree and low in cost.

Description

technical field [0001] The invention relates to a fast-response soft-switch isolation inverter and a method thereof, belonging to the field of inverters. Background technique [0002] An inverter is a DC / AC converter that converts DC power into AC power. The inverter is the power converter used in the power generation system. It is another important component in the power generation system besides the battery. At present, due to the large switching loss of the power electronic power switching tube, the transmission efficiency of the inverter is affected; in addition, the response speed of the traditional inverter to the load change is slow, which affects the power supply performance of the inverter. [0003] In the traditional hard-switching inverter, the current rise and voltage drop of the switching device are carried out simultaneously; when it is turned off, the collector voltage of the switch tube rises and the current drops simultaneously. The overlapping part of vol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48
CPCH02M7/4807H02M1/0012H02M1/0058H02M7/4815Y02B70/10
Inventor 朱东柏胡法国杨喆李建镇谢非孙佳莹
Owner HARBIN UNIV OF SCI & TECH
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