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Wide-range soft switching direct-current conversion circuit and control method thereof

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, reducing switching loss and improving power density

Active Publication Date: 2017-10-20
SHENZHEN BOYN ELECTRIC
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  • Abstract
  • Description
  • Claims
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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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  • Wide-range soft switching direct-current conversion circuit and control method thereof
  • Wide-range soft switching direct-current conversion circuit and control method thereof
  • Wide-range soft switching direct-current conversion circuit and control method thereof

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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 present invention provides a wide-range soft switching direct-current conversion circuit and a control method thereof. The circuit includes a first series resonance inversion circuit, a second series resonance inversion circuit, a first high-frequency isolation transformer, a second high-frequency isolation transformer, a rectification circuit and a controller; the input ends of the first series resonance inversion circuit and the second series resonance inversion circuit are connected with a direct-current power source; two output ends of the first series resonance inversion circuit and the second series resonance inversion circuit are connected with two ends of the primary sides of the first high-frequency isolation transformer and the second high-frequency isolation transformer respectively; the secondary sides of the first high-frequency isolation transformer and the second high-frequency isolation transformer are connected in series and then are connected into the rectification circuit; the controller inputs control signals to the first series resonance inversion circuit and the second series resonance inversion circuit; and two output ends of the rectification circuit are connected with loads. With the control method adopted, the inversion circuits can operate in an in-phase mode or in an anti-phase mode. The wide-range soft switching direct-current conversion circuit and the control method thereof of the present invention can be not only adaptive to a wide input voltage range and but also have 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 Applications(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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