Zero-voltage transmission half bridgeless power factor correction converter

A technology of power factor correction and converters, which is applied in the direction of high-efficiency power electronic conversion, output power conversion devices, electrical components, etc., can solve problems such as high cost, low efficiency of the whole machine, complex topology of the converter, etc., and achieve reduction in volume and cost, improve the efficiency of the whole machine, and simplify the effect of the topology

Active Publication Date: 2017-06-20
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a ZVT semi-bridgeless power factor correction converter, which can also realize the quasi-ZCS turn-off of the auxiliary switching tube and suppress its parasitic oscillation, and can also solve the problems of the prior art The technical problems of complex topology, high cost and low overall efficiency of the medium converter

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  • Zero-voltage transmission half bridgeless power factor correction converter
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  • Zero-voltage transmission half bridgeless power factor correction converter

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0020] The ZVT semi-bridgeless power factor correction converter described in this embodiment, such as image 3 As shown, including the main circuit of the semi-bridgeless BoostPFC converter and the active auxiliary resonant branch, where:

[0021] The main circuit of the semi-bridgeless Boost PFC converter includes a first boost inductor, a second boost inductor, a first main switch, a second ...

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Abstract

The invention discloses a zero-voltage transmission half bridgeless Boost PFC converter. According to the invention, only by adding a rapid recovery diode D7 can an RCD clamp network be replaced; parasitic oscillation during cutting off of quasi zero current of an auxiliary switch tube is inhibited; the topology of the converter is simplified; and when the auxiliary switch tube is turned off, exciting current will be introduced into a parasitic capacitor, and is fully used by a circuit, so the overall efficiency of the converter is improved. In addition, through the provided converter, natural turning on and turning off of a zero voltage switch and a boost diode of a main switch tube are achieved; natural switching on and off of each connected diode in the circuit is also achieved; technical problems of complex topology, quite high cost and quite low overall efficiency of a converter in the prior art are solved; and the provided converter can be well popularized in actual application.

Description

technical field [0001] The present invention relates to a soft-switching power factor correction converter, and more specifically relates to a zero-voltage switching power factor correction converter used in large and medium power applications. Background technique [0002] Adding a single-phase power factor correction converter in the front stage of various power electronic devices is the main way to solve the harmonic pollution of the power grid at present. Among single-phase power factor correction converter topologies, the general-purpose bridgeless Boost PFC converter has become an ideal converter topology for large and medium power applications due to its greatly reduced conduction loss. But its inherent high common mode interference brings great limitations to its application in the industry. In view of the above problems, the existing literature has proposed a semi-bridgeless Boost PFC converter, such as figure 1 shown. The converter connects the power supply and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42
CPCH02M1/4225H02M1/4241H02M1/0058Y02B70/10Y02P80/10
Inventor 胡玮康勇周小宁李承
Owner HUAZHONG UNIV OF SCI & TECH
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