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Three-level clamping topology circuit for direct-current frequency conversion and direct-current frequency conversion equipment

A topological circuit and DC frequency conversion technology, applied in the field of DC frequency conversion, can solve problems such as voltage unevenness, overvoltage breakdown, etc., and achieve the effect of improving stability and safety

Pending Publication Date: 2022-04-26
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The embodiment of the present disclosure provides a three-level clamping topology circuit for DC frequency conversion and DC frequency conversion equipment to solve the problem of possible overvoltage breakdown of IGBTs or anti-parallel diodes in series due to uneven voltage in the cut-off state. Hidden problems

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  • Three-level clamping topology circuit for direct-current frequency conversion and direct-current frequency conversion equipment
  • Three-level clamping topology circuit for direct-current frequency conversion and direct-current frequency conversion equipment
  • Three-level clamping topology circuit for direct-current frequency conversion and direct-current frequency conversion equipment

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Embodiment Construction

[0031] The following description and the accompanying drawings sufficiently illustrate specific embodiments of the disclosure to enable those skilled in the art to practice them. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present disclosure includes the full scope of the claims, and all available equivalents of the claims. Herein, various embodiments may be referred to individually or collectively by the term "invention", which is for convenience only and is not intended to automatically limit the scope of this application if in fact more than one invention is disclosed. A single invention or inventive concept. Herein, relational terms such as first and second etc. are used only to distinguish one entity or operatio...

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Abstract

The invention relates to the technical field of direct-current frequency conversion, and discloses a three-level clamping topology circuit for direct-current frequency conversion and direct-current frequency conversion equipment. The three-level clamping topology circuit for direct-current frequency conversion is characterized in that an anode of a first clamping diode D5 and a cathode of a second clamping diode D6 are connected in parallel to the same point N in the three-level clamping topology circuit for direct-current frequency conversion; and a resistor R is connected in series between the cathode of the first clamping diode D5 and the anode of the second clamping diode D6. Therefore, the problem that a device is broken down by overvoltage due to non-uniform cut-off voltage of the direct-current frequency conversion equipment is solved, and the stability and the safety of the direct-current frequency conversion equipment are improved.

Description

technical field [0001] The application relates to the technical field of DC frequency conversion, in particular to a three-level clamping circuit for DC frequency conversion and DC frequency conversion equipment. Background technique [0002] At present, in smart home appliances, many appliances are driven by DC frequency conversion devices, such as air conditioners, refrigerators and so on. The DC frequency conversion equipment uses a DC frequency conversion three-level clamping topology circuit to control the output circuit. [0003] figure 1 It is a DC frequency conversion three-level clamping topology circuit used in the related art. Such as figure 1 As shown, it includes: two clamping diodes, respectively D5 and D6, and four insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) modules connected in series, wherein each IGBT module includes: an insulated gate bipolar transistor The transistor Q and a corresponding anti-parallel diode D; the topo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/483H02M7/487H02M7/537H02M1/32
CPCH02M7/483H02M7/487H02M7/537H02M1/32
Inventor 于飞邵海柱贾新旭
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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