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Switched capacitor resonant DC converter

A technology of DC converters and switched capacitors, applied in high-efficiency power electronic conversion, output power conversion devices, conversion equipment without intermediate conversion to AC, etc., can solve the problem of inability to achieve zero-crossing current or zero-crossing voltage soft switching. , to reduce the switching loss

Pending Publication Date: 2022-03-25
剑桥大学南京科技创新中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it cannot realize zero-crossing current or zero-crossing voltage soft switching

Method used

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  • Switched capacitor resonant DC converter
  • Switched capacitor resonant DC converter
  • Switched capacitor resonant DC converter

Examples

Experimental program
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Embodiment Construction

[0023] exist figure 1 In the main circuit of , the switches are divided into two switch groups, and each switch group receives the same input signal at the respective input terminals of the switch. The switch group consists of the input signals S1 and S2 at the switch inputs in Fig. 1, respectively. The control signal applied to the input terminal of the switch Q will complete the control work of the energy transmission loop between the input terminal of the switched capacitor resonant cavity and the output subcircuit of the switched capacitor resonant cavity. The capacitance of the switched capacitors C1, C2, C3, and C4 (which can reach the microfarad level) is greater than that of the capacitors Cr1 and Cr2 of the resonant cavity; in some embodiments, the switched capacitors can be about an order of magnitude higher than the capacitors of the resonant tank; The capacitance is much higher than that of the resonant capacitor in the resonant cavity, and the equivalent series c...

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Abstract

A switched capacitor resonant direct current converter comprises a switch tube, a series load capacitor and a combination of a plurality of resonant cavity loops. Each series load capacitor, namely a switched capacitor, is used as an independent voltage divider and energy storage; each resonant circuit comprises at least one resonant inductor and at least one resonant capacitor; the control logic is a control logic that generates two or more sets of control signal inputs, the control signal inputs of the control logic being applied to the input of the switch, thereby forming one or more sub-circuit loops for each set of control signals, and wherein one or more sub-circuit loops are coupled to the switch. One or more sub-circuit loops for a certain set of control signals, each sub-circuit loop comprising one or more resonant loops, and at least one sub-circuit loop comprising a non-resonant capacitor; energy stored in each individual switched capacitor is transferred through the resonant tank to another adjacent switched capacitor by control logic.

Description

technical field [0001] The invention relates to a power conversion device, especially a DC-DC voltage converter. Background technique [0002] In data centers and electric vehicles, there is an increasing need for more efficient voltage-adaptive scalable power conversion from DC48 V to point-of-load (PoL) applications. [0003] A typical state-of-the-art switched capacitor converter consists of four large MOS switches in a typical switching sequence, doubling or halving the input supply voltage. Energy transfer and storage are provided by external capacitors. The input voltage is applied across a capacitor (C1). During the second part of the switching cycle, charge is transferred from C1 to the second capacitor, C2. The most traditional switched capacitor converter construction is an inverter where C2 has a grounded positive terminal and its negative terminal delivers the negative output voltage. After a few cycles, the voltage across C2 will be applied to the input volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07H02M1/32
CPCH02M3/07H02M1/32Y02B70/10
Inventor 赵晖龙腾
Owner 剑桥大学南京科技创新中心有限公司