Resonant switched capacitor direct current voltage converter

A DC voltage, switched capacitor technology, applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and converting equipment without intermediate conversion to AC, can solve the problem of inapplicability of gate drive circuits, improve the complexity of SCRC, and convert In order to reduce the parasitic inductance, improve the driving speed, and reduce the switching loss

Active Publication Date: 2009-09-02
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although SCRC has many advantages, a simple gate drive circuit cannot be applied to this converter, requiring an isolation transformer and/or half-bridge gate drive, thus increasing the complexity of the SCRC
Also, the paras

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  • Resonant switched capacitor direct current voltage converter
  • Resonant switched capacitor direct current voltage converter
  • Resonant switched capacitor direct current voltage converter

Examples

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Embodiment Construction

[0026] figure 1 Shown is a circuit diagram of the step-up resonant switched capacitor DC voltage converter 13 . The DC voltage converter 13 includes a pair of complementary metal oxide semiconductor field effect transistor (MOSFET) switches 4 , 5 . Switch 4 is a P-channel MOSFET, and switch 5 is an N-channel MOSFET. In other embodiments, insulated gate bipolar transistors (IGBTs) and other suitable semiconductor switches may also be used. Each switch is equipped with an anti-parallel diode as part of the MOSFET package. A first and a second diode 6,7 are connected in series between the first and the second voltage node 1,2.

[0027] The DC voltage converter 13 has a first voltage V1 between the first voltage node 1 and the ground or negative line 3 and a second voltage V2 between the second voltage node and the ground or negative line 3 . Ground or negative line 3 is at either potential which is lower than the potential of nodes 1,2. Two filter capacitors 8, 11 are connec...

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Abstract

The invention relates to a resonant switched capacitor direct current voltage converter which comprises a first voltage node, a second voltage node, a first switch, a second switch, a first diode, a second diode and a control circuit, wherein a first voltage exists between the first voltage node and a negative wire; a second voltage exists between the second voltage node and the negative wire; and the control circuit provides switching gate signals for the first and the second switches. The resonant switched capacitor direct current voltage converter further comprises a center-tapped inductor and a resonant capacitor, wherein the center-tapped inductor is connected between the first switch and the second switch; and the resonant capacitor is connected between the common node of the first and the second diodes and the central node of the center-tapped inductor. Compared with the conventional switched capacitor direct current voltage converter, the invention has the advantages of reducing complexity, loss and cost, improving the speed, and avoiding the limitation.

Description

technical field [0001] The invention relates to a resonant switched capacitor DC voltage converter. Background technique [0002] In the field of DC power conversion, a conversion circuit combining switches and capacitors is used to convert different voltages. This type of converter uses capacitors to store electrical energy, and is called a switched capacitor converter (Switched Capacity Converter, SCC). Since this type of converter has no inductor or transformer, it is smaller than other types of converters and can be easily fabricated on an integrated circuit. However, high peak currents typically occur when charging and discharging switched capacitors. Therefore, such converters are usually used in low voltage environments. US Patent Publication No. US20040141345A1 provides a new switched capacitor circuit called a resonant switched capacitor converter (Switched Capacitor Resonant Converter, SCRC), which can work in a high switching frequency and high voltage environm...

Claims

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Application Information

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IPC IPC(8): H02M3/10H02M3/155
Inventor 郑家伟何濠辉丁凯
Owner THE HONG KONG POLYTECHNIC UNIV
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