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AC-DC converter and control system

An AC-to-DC conversion and full-control technology, applied in control/regulation systems, DC power input conversion to DC power output, AC power input conversion to DC power output, etc., can solve the problem of large number of conversion stages, heavy AC-DC converters, Poor pre-filtering effect and other problems, to achieve the effect of current shaping

Pending Publication Date: 2022-07-29
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, the AC-DC converter provided by the related art has the following disadvantages: the two-stage conversion makes the existing AC / DC isolation conversion, the number of conversion stages is large, the pre-stage filtering effect is not good, and the AC-DC converter is bulky

Method used

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  • AC-DC converter and control system
  • AC-DC converter and control system
  • AC-DC converter and control system

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail below with reference to the accompanying drawings. All other embodiments obtained under the premise of creative work fall within the scope of protection of the present application.

[0038] In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" can be the same or a different subset of all possible embodiments, and Can be combined with each other without conflict.

[0039] If a similar description of "first\second\third" appears in the application documents, the following description will be added. In the following description, the terms "first\second\third" are only used to distinguish and similar Objects do not represent a specific order for objects. It is understood that "first\second\third" can be...

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Abstract

The invention provides an alternating current-direct current converter and a control system, the alternating current-direct current converter comprises three alternating current-direct current conversion sub-modules, each alternating current-direct current conversion sub-module comprises a filtering unit, a switch and capacitor unit and a transformation and rectification unit, the input end of the filtering unit is used for being connected with any two phases of a three-phase power supply, and the input end of the switch and capacitor unit is used for being connected with any two phases of the three-phase power supply; the output end of the filtering unit is connected with the input end of the switch and capacitor unit, the output end of the switch and capacitor unit is connected with the input end of the transformation and rectification unit, and the positive electrode output end of the transformation and rectification unit is connected with the positive electrode output terminal of the AC-DC converter. The negative electrode output end of the voltage transformation and rectification unit is connected with the negative electrode output terminal of the alternating current-direct current converter, so that direct current and alternating current can be isolated, and meanwhile, current shaping is considered.

Description

technical field [0001] The present application relates to the technical field of AC / DC converters, and in particular, to an AC / DC converter and a control system. Background technique [0002] AC-DC converters are widely used in industrial fields such as rail transit to convert AC to DC to supply power to DC electrical equipment. For the compatibility between the AC-DC converter and other AC power equipment and to improve the capacity utilization rate of the AC power supply, it is usually desirable to filter to make the input current of the AC-DC converter sinusoidal. For the safety of electrical equipment and personal safety, electrical isolation is usually required between different voltage levels of AC-DC converters. [0003] figure 1 is a schematic structural diagram of an AC-DC converter provided in the related art, such as figure 1 As shown, in the related art, the front-stage AC / DC adopts large-capacity low-pass filtering to improve the input current, and the rear-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M3/335H02M1/088
CPCH02M7/217H02M3/3353H02M1/088
Inventor 曹金洲张小勇周峰武罗盼
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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