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A phase-shifted full-bridge converter and its soft-start method and device

A phase-shifting full-bridge and converter technology, applied in output power conversion devices, conversion of DC power input to DC power output, instruments, etc., can solve problems such as inability to meet customer needs

Active Publication Date: 2021-07-23
SHANGHAI KOSTAL HUAYANG AUTOMOTIVE ELECTRIC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, how to avoid being unable to meet customer needs due to the traditional soft start method is a technical problem that those skilled in the art need to solve at present

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  • A phase-shifted full-bridge converter and its soft-start method and device
  • A phase-shifted full-bridge converter and its soft-start method and device
  • A phase-shifted full-bridge converter and its soft-start method and device

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] The core of the present invention is to provide a soft-start method for a phase-shifted full-bridge converter. The soft-start method does not need to pre-set the start-up type, and can be applied to any type of load, no matter what kind of load the phase-shifted full-bridge converter carries. Both can have a relatively smooth start waveform, and can reach the rated output value within a specified time; the soft start method can greatly improve the versat...

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Abstract

The invention discloses a soft start method for a phase-shifted full-bridge converter. The phase-shifted full-bridge converter includes a primary-side full-bridge circuit, a secondary-side synchronous rectification circuit, and an active clamp circuit; the soft-start method includes obtaining the minimum phase-shifted angle; calculate the PWM waves corresponding to the above three circuits according to the minimum phase shift angle, and set each PWM wave to the corresponding PWM channel; obtain the new phase angle according to the preset rules; The above three circuits correspond to the PWM waves, and each PWM wave is set to the corresponding PWM channel, and then the step of obtaining a new phase angle is performed until the end condition of the soft start is met to end the soft start. The invention also discloses a soft start device of a phase-shifted full-bridge converter and a phase-shifted full-bridge converter comprising the above-mentioned soft start method and device. The above soft start method can realize the smooth start of the converter and is applicable to different types of loads, thereby improving the versatility of the converter and enhancing its competitiveness.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted converters, in particular to a soft start method for a phase-shifted full-bridge converter. The invention also relates to a soft start device for a phase-shifted full-bridge converter and a phase-shifted full-bridge converter with the soft start method and device. Background technique [0002] The on-board DCDC is responsible for energy conversion between the on-board high-voltage battery and the low-voltage battery. The phase-shifted full bridge is widely used in the on-board DCDC converter due to its high efficiency, low cost, simple design and electrical isolation. It can be used not only to charge constant voltage loads such as batteries, but also to directly supply power to various constant resistance or constant current loads. [0003] When the DCDC converter is started, if it is not dealt with, there will be a large impulse voltage and impulse current, which will cause two problems...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/36H02M3/335H02M1/32
CPCH02M1/32H02M1/36H02M3/3353Y02B70/10
Inventor 王峰单洁炜廖政伟徐金良
Owner SHANGHAI KOSTAL HUAYANG AUTOMOTIVE ELECTRIC
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