A Buck Converter Topology
A converter and topology technology, applied in the field of Buck-type converter topology, can solve the problems of inability to meet the requirements of the voltage and current levels of the device, and the flexibility and stability of the AC converter are demanding, so as to reduce the size and quality, improve the quality, the effect of reducing total harmonic distortion
Active Publication Date: 2019-02-26
广东创电科技有限公司 +1
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Problems solved by technology
[0002] With the large-capacity, new energy, and special environment power conversion technologies, especially the popular power electronic transformers, sinusoidal AC voltage regulators, AC choppers, and flexible AC transmission system (FACTS) controllers, etc. The flexibility and stability requirements of converters are becoming more and more stringent, and the traditional two-level converter topology can no longer meet the requirements of device voltage and current levels
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[0036] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] In the prior art, the converter needs a transformer as an intermediate link, and there are two stages of power conversion circuits before and after the transformer. During the conversion process, it needs to be rectified to DC and then reversed to AC. The conversion process of the converter is relatively complicated. The invention provides a Buck converter topology, in which no transformer is needed, and the single-stage power conversion can be realized directly from AC to AC.
[0038] Such as figure 1 As shown, it is a topological circuit diagram of a Buck converter of the prese...
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The invention discloses a Buck-type converter topology. The topology comprises a bidirectional switch module, a voltage reduction module, an output filtering module, an input voltage-dividing module and an input filtering module, the input filtering module is connected with the input voltage-dividing module and the bidirectional switch module, the input voltage-dividing module is connected with the bidirectional switch module and the voltage reduction module, the bidirectional switch module is connected with the voltage reduction module and the output filtering module, the voltage reduction module is connected with the output filtering module, and the switching modal of the topology is adjusted through control of switch-on or switch-off of the bidirectional switch module and the voltage reduction module. According to the topology, approximation of expected waveforms is realized by employing the large level number, the THD value is effectively reduced, the size and the mass of a filter are reduced, and the output waveform quality is improved.
Description
technical field [0001] The invention relates to the technical field of electric energy conversion, in particular to a Buck converter topology. Background technique [0002] With the large-capacity, new energy, and special environment power conversion technologies, especially the popular power electronic transformers, sinusoidal AC voltage regulators, AC choppers, and flexible AC transmission system (FACTS) controllers, etc. The flexibility and stability requirements of converters are becoming increasingly stringent, and the traditional two-level converter topology can no longer meet the requirements of device voltage and current levels. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a Buck converter topology to solve the technical problem of lower voltage and current levels of the converter topology in the prior art. [0005] The techn...
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IPC IPC(8): H02M7/217H02M1/14
CPCH02M1/14H02M7/217
Inventor 廖慧李湘峰
Owner 广东创电科技有限公司