Isolated parallel CUK push-pull topology

An isolated and topological technology, which is applied to the conversion equipment, instruments, and electrical variables of the Cuk converter. It can solve the problems of inability to output alternating current and limited flexibility, so as to improve the power efficiency and prevent electric shock. , Improve the effect of electrical efficiency

Inactive Publication Date: 2017-09-29
广西高焱电气工程有限责任公司 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] ⑤ Disadvantages: The traditional non-isolated CUK topology can only output DC, and it is reverse polarity DC, and cannot output AC, which limits the flexibility of use

Method used

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  • Isolated parallel CUK push-pull topology
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  • Isolated parallel CUK push-pull topology

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Embodiment Construction

[0034] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings, but this does not constitute a limitation to the protection scope of the claims of the present invention.

[0035] Such as figure 2As shown, the isolated parallel CUK push-pull topology of the present invention, the input power U 1N The positive pole of the power electronic switch T is connected at the same time 1 The drain and the same-named end of the primary winding N12 of the transformer TR, and the same-named end of the primary winding N12 is connected to the power electronic switch T at the same time 2 The drain and capacitor C i One end of the capacitor C i The other end of the transformer TR is simultaneously connected to the opposite end of the primary winding N11 of the transformer TR and the power electronic switch T 1 The source of the primary winding N11 is connected to the power electronic switch T at the same t...

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Abstract

The invention discloses an isolated parallel CUK push-pull topology. A positive electrode of an input DC power supply U<1N> is simultaneously connected with a drain of a power electronic switch T1 and a dotted end of a primary winding N12 of a transformer TR, a non-dotted end of the primary winding N12 is simultaneously connected with a drain of a power electronic switch T2 and one end of a capacitor Ci, the other end of the capacitor Ci is simultaneously connected with a non-dotted end of a primary winding N11 of the transformer TR and a source of the power electronic switch T1, a dotted end of the primary winding N11 is simultaneously connected with a source of the power electronic switch T2 and a negative electrode of the input DC power supply U<1N>, a secondary winding N2 of the transformer TR supplies power to a load, and the power electronic switch T1 and the power electronic switch T2 both employ GaN transistors and are controlled to be alternatively conducted or cut off by an input control pulse. The topology is isolated, has good electric shock prevention safety, can output alternating current and is small in input ripple and output ripple, the problem of DC magnetic biasing can be solved, the negative influence of leakage inductance can be overcome, and the power efficiency can reach 0.95 or above.

Description

technical field [0001] The invention belongs to the technical field of power supplies, in particular to an isolated parallel CUK push-pull topology. Background technique [0002] Traditional non-isolated topologies include step-down BUCK, step-up BOOST, buck-boost BUCK-BOOST, CUK, Sepic, and Zeta. The step-down BUCK can only step down but not boost, and the output and input have the same polarity Characteristic, large input current pulsation, small output current pulsation, simple structure, used in various step-down switching regulators. The boost type BOOST can only boost the voltage but not step down, the output and input have the same polarity, the input current ripple is small, the output current ripple is large, it cannot work without load, and the structure is simple. It is used in boost switching regulators, boost type Power Factor Correction Circuit (PFC). The buck-boost type BUCK-BOOST can step down and boost the voltage, the output is opposite to the input polar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00H02M3/337H02M3/335
CPCH02M3/005H02M3/33584H02M3/33592H02M3/3372Y02B70/10
Inventor 蔡义明王堃宇石常青常小霞
Owner 广西高焱电气工程有限责任公司
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