A Multiphase Resonant Bridge Modular Multilevel Switched Capacitor Converter

A modular multi-level, switched capacitor technology, applied in the direction of high-efficiency power electronic conversion, regulation of electrical variables, conversion of DC power input to DC power output, etc., can solve the problem of large input current ripple that affects the efficiency of converter energy conversion etc. to achieve the effect of reducing output current ripple, improving conversion efficiency and power density

Active Publication Date: 2015-12-09
XIAMEN UNIV
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Problems solved by technology

However, for a single ZCS bridge multi-level modular switched capacitor converter, the input current ripple is large, and a capacitor with a large capacity value is often required to filter the current ripple to adapt to the application in photovoltaic power generation, which is bound to Affects the efficiency of the entire converter energy conversion

Method used

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  • A Multiphase Resonant Bridge Modular Multilevel Switched Capacitor Converter
  • A Multiphase Resonant Bridge Modular Multilevel Switched Capacitor Converter
  • A Multiphase Resonant Bridge Modular Multilevel Switched Capacitor Converter

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Embodiment Construction

[0018] The present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments.

[0019] refer to Figure 1 to Figure 4 , figure 1 It is a structural schematic diagram of a multi-phase resonant bridge-type modular multi-level switched capacitor converter provided by the present invention, which includes m unit resonant switched capacitor circuits connected in parallel. figure 2 It is a unit resonant switched capacitor circuit, including an H bridge 1, a resonant inductor 2 and a basic switched capacitor module 3. image 3 For the H-bridge circuit diagram, Figure 4 It is a switched capacitor module circuit. The H-bridge contains four MOSFET switch tubes, where S 1 , S 4 A pair of switch tubes that are turned on at the same time, S 2 , S 3 It is another pair of switch tubes that are turned on at the same time. S 2 , S 3 The drive signal hysteresis S 1 , S 4 The drive signal 180°. The basic switched capacitor module incl...

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Abstract

The invention discloses a multiphase resonance bridge type modular multi-level switch capacitor converter. The input ports of at least two unit resonance switch capacitor circuits are connected in parallel with each other, and the output ports of the two unit resonance switch capacitor circuits are connected in parallel with each other; the unit resonance switch capacitor circuits are bridge type modular multi-level switch capacitor converter topologies; each unit circuit realizes resonance soft switches and guarantees output of 4N times of input voltage; phase-shifting control is adopted among all the unit circuits. The output voltage ripple is further reduced, and the problem that the input current ripple of a single-phase switch capacitor converter is tool high is solved, so that the energy conversion efficiency of a system and the power class of the converter are further improved. The multiphase resonance bridge type modular multi-level switch capacitor converter is applicable to occasions with high current and high gain.

Description

technical field [0001] The invention relates to a multiphase switched capacitor converter, in particular to a multiphase DC-DC switched capacitor converter. Background technique [0002] For the switched capacitor converter with traditional structure, there are problems such as large voltage spikes and electromagnetic interference during operation, and as the switching frequency increases, the switching loss also increases rapidly. In order to solve the above problems, a zero current switching (ZCS) technology is introduced in the converter, which makes full use of the stray inductance in the circuit as a resonant inductance. The proposed switched capacitor converter with leap capacitor (FCSCC), multi-level modular switched capacitor converter (MMSCC) and symmetrical multi-level modular switched capacitor converter (SMMSCC) are the one proposed in the invention Compared with the bridge modular multilevel switched capacitor converter (BMSCC), there is no advantage in the num...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M1/14
CPCY02B70/10
Inventor 何良宗周伟曾涛张景瑞
Owner XIAMEN UNIV
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