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A wide-range soft-switching DC conversion circuit and its control method

A technology of DC conversion circuit and control method, applied in the direction of DC power input conversion to DC power output, irreversible DC power input conversion to AC power output, control/regulation system, etc., can solve the problem of narrow output voltage range, etc. To achieve the effect of widening range, improving applicability and increasing power density

Active Publication Date: 2020-07-21
SHENZHEN BOYN ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of narrow output voltage range in the prior art, and propose a wide-range soft-switching DC conversion circuit and its control method

Method used

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  • A wide-range soft-switching DC conversion circuit and its control method
  • A wide-range soft-switching DC conversion circuit and its control method
  • A wide-range soft-switching DC conversion circuit and its control method

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Embodiment Construction

[0042] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0043] refer to figure 1 , the wide-range soft-switching DC conversion circuit of the present invention includes first and second series resonant inverter circuits 210 and 220, first and second high-frequency isolation transformers T RA and T RB , a rectifier circuit 300 and a controller 400; the input ends of the first and second series resonant inverter circuits 210 and 220 are connected to the DC side 100; the DC side 100 provides DC for the first and second series resonant inverter circuits 210 and 220 Power supply; the two output terminals of the first series resonant inverter circuit 210 and the first high-frequency isolation transformer T RA The two ends of the primary side are connected, and the two output ends of the second series resonant i...

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Abstract

The invention provides a wide-range soft-switching DC conversion circuit and a control method thereof. The circuit includes first and second series resonant inverter circuits, first and second high-frequency isolation transformers, rectifier circuits and controllers; the input ends of the first and second series resonant inverter circuits are used for direct current source connection, the two output terminals of the first and second series resonant inverter circuits are respectively connected to the two ends of the primary sides of the first and second high-frequency isolation transformers, and the first and second high-frequency isolation transformers The secondary side is connected in series to the rectifier circuit, the controller inputs control signals to the first and second series resonant inverter circuits, and the two output terminals of the rectifier circuit are used to connect to the load. The method enables the inverter circuit to work in the same-phase mode or the wrong-phase mode. The invention not only can adapt to a wide input voltage range, but also has a wider output voltage range.

Description

technical field [0001] The invention relates to a DC switching power supply, in particular to a wide-range soft-switching DC conversion circuit and a control method thereof. Background technique [0002] Existing backup power applications, such as UPS, vehicle batteries, etc., need to convert and release the energy stored in the battery. Due to the reason of wide-range voltage conversion, most traditional conversion circuits are based on hard-switching tube schemes, or use components with higher voltage levels to meet the voltage stress caused by wide-range conversion, but the output voltage range is still narrow. limit its scope of application. [0003] In addition, there are still problems of low efficiency or large volume. For example, the current 3.5KVA and 110V inverter power supply products for railways, the efficiency of mainstream products is mostly 85%. At 88%, and the volume is larger. Compared with the relatively mature inverter technology, the key problem lies...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M7/48
CPCH02M3/33592H02M7/48H02M7/4815Y02B70/10
Inventor 李伦全刘嘉键燕沙郑车晓
Owner SHENZHEN BOYN ELECTRIC
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