An isolated three-half-bridge AC-DC converter circuit and its control method
An AC-DC, isolated technology, applied in the direction of irreversible DC power input to AC power output, AC power input to DC power output, electrical components, etc., can solve the problem of increased switching loss and reduce switching loss. , the effect of fewer devices and reduced power loss
Active Publication Date: 2021-10-22
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology
When the resonant inverter circuit works out of the resonance state, the switch of the inverter circuit no longer works in the soft switching state, thus increasing the loss of the switch
Method used
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[0042] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0043] figure 1 It is a structural schematic diagram of an isolated three-half-bridge AC-DC converter circuit provided by the present invention, as shown in figure 1 shown, including:
[0044] The input rectification circuit is used to process the AC voltage and AC current input by the AC input terminal a and the AC input terminal b into DC voltage and DC current output by the DC bus U1+ and the DC bus U1-;
[0045] A high-frequency inverter circuit, configured to process the DC voltage and DC current output by the DC bus U1+ and the DC bus U1- into AC voltage and AC current on the primary winding of the transformer T1;
[0046] The transformer T1 is us...
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The invention discloses an isolated three-half-bridge AC-DC converter circuit and a control method thereof. The isolated three-half-bridge AC-DC converter circuit includes: an input rectifier circuit for converting an AC input terminal a to an AC input terminal b The input AC voltage and AC current are processed into DC voltage and DC current output by the DC bus U1+ and the DC bus U1‑; the high-frequency inverter circuit is used to convert the DC output by the DC bus U1+ and the DC bus U1‑ The voltage and DC current are processed into the AC voltage and AC current on the primary winding of the transformer T1; the transformer T1 is used to obtain the AC voltage and AC current on the secondary winding according to the AC voltage and AC current on the primary winding; output The rectification circuit is used to process the AC voltage and AC current on the secondary winding of the transformer T1 into DC voltage and DC current output by the DC bus U2+ and the DC bus U2‑.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to an isolated three-half-bridge AC-DC converter circuit and a control method thereof. Background technique [0002] By inputting AC voltage and current, the required DC voltage and current are output for use by various electrical equipment and devices. For the safety of the equipment or to obtain mutually isolated DC power, in the conversion from AC to DC, use isolation transformer for isolation. Therefore, the AC-to-DC converter circuit and device with isolation have a wide range of uses. [0003] In addition to being able to output specified DC and high input power factor (AC power factor is close to 1), the isolated AC-DC converter circuit can improve the efficiency of the device, reduce the volume, and reduce the cost. It is an isolated AC-DC converter The constant pursuit of circuits and devices. [0004] The basic process of AC-DC conversion with isolation is "AC...
Claims
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IPC IPC(8): H02M7/219H02M7/48
CPCH02M7/219H02M7/48H02M1/0058H02M7/4815Y02B70/10
Inventor 张雪原张绍全李杨唐琦林黄皓伦王裕鑫蒋世奇张江林
Owner CHENGDU UNIV OF INFORMATION TECH