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Inverter system, DC/DC converter and soft switching method thereof

A converter and soft-switching technology, which is applied in the direction of converting irreversible DC power input to AC power output, control/regulation systems, DC power input to DC power output, etc. It can solve the problem of inaccurate resonance frequency and affect the resonance frequency The calculation results and device parameters deviate from the actual situation, etc., to avoid the inaccuracy of the fixed resonant frequency and improve the reliability.

Pending Publication Date: 2022-03-08
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology

[0003] However, in practical applications, individual differences in components may cause the marked device parameters to deviate from their actual conditions, thereby making the calculated resonant frequency inaccurate; in addition, differences in the external environment may also affect the calculation of the resonant frequency; therefore , the soft switching control reliability of this topology is low

Method used

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  • Inverter system, DC/DC converter and soft switching method thereof
  • Inverter system, DC/DC converter and soft switching method thereof
  • Inverter system, DC/DC converter and soft switching method thereof

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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] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...

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Abstract

The invention provides an inverter system, a DC / DC converter and a soft switching method thereof, and the soft switching method comprises the steps: firstly collecting the operation parameters of a main circuit in the DC / DC converter; determining the resonant frequency of a series resonant circuit according to the operation parameters; the real resonant frequency can be determined according to the actual operation condition; according to the resonant frequency, after the switching frequency of the main circuit is set, on-off control is carried out on a switching tube of the main circuit; therefore, it can be ensured that the switching frequency is set based on the real resonant frequency, the problem that the fixed resonant frequency is inaccurate due to the difference of components and parts and the difference of the external environment is avoided, and the reliability of soft switching control is improved.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an inverter system, a DC / DC converter and a soft switching method thereof. Background technique [0002] figure 1 Shown is a commonly used DC / DC converter. In its topology, capacitor Cb and inductor L form a series resonant circuit; in the prior art, in order to realize soft switching control under this topology, it is necessary to The device parameters of these two resonant devices are calculated to obtain the fixed resonant frequency of the topology; then according to the fixed resonant frequency, the switching frequencies of the internal switching tubes Q1 to Q4 are set so that each switching tube is in the zero current state as much as possible turn on and off. [0003] However, in practical applications, individual differences in components may cause the marked device parameters to deviate from their actual conditions, thereby making the calculated resonant frequ...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02M1/088H02H7/12H02M7/48H02J7/35
CPCH02M3/158H02M1/088H02H7/1213H02M7/48H02J7/35Y02B70/10
Inventor 孙帅陈鹏王志成丁杰
Owner SUNGROW POWER SUPPLY CO LTD
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