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Single switching tube high-grain converter based on coupling inductance voltage-multiplying unit

A technology of coupled inductor and single switch, which is applied in the direction of electrical components, adjusting electric variables, output power conversion devices, etc., can solve the problems of complex circuit structure and small voltage gain, so as to improve the voltage gain and suppress the turn-off voltage spike Effect

Active Publication Date: 2012-02-29
杭州浙阳电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings of complex circuit structure and small voltage gain of the existing boost converter, the present invention provides a coupling-based converter that not only suppresses the turn-off voltage spike of the switch tube but also recovers the leakage inductance and has high energy-voltage gain. High-gain Converter with Single-Switch Transistor Based on Inductor Voltage Doubler Unit

Method used

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  • Single switching tube high-grain converter based on coupling inductance voltage-multiplying unit
  • Single switching tube high-grain converter based on coupling inductance voltage-multiplying unit
  • Single switching tube high-grain converter based on coupling inductance voltage-multiplying unit

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Embodiment 1

[0016] Refer to attached figure 1 , 2 , a single-switch high-gain converter based on a coupled inductor voltage doubler unit, which includes a coupled inductor La and Lb with primary and secondary windings, a voltage doubler capacitor Cm, a switched capacitor Cc, and an output capacitor C0, Two freewheeling diodes Dr1, Dr2, an output diode D0, and a switch tube S; the first end of the primary winding La of the coupling inductor is connected to the positive pole of the input power supply Vin and the first end of the voltage multiplier capacitor Cm, and the coupling The second end of the primary winding La of the inductor is connected to the drain of the switching tube S, the anode of the first freewheeling diode Dr1 and the first end of the switching capacitor Cc; the first end of the secondary winding Lb of the coupled inductor is connected to The second end of the voltage multiplying capacitor Cm is connected, and the second end of the secondary winding Lb of the coupled ind...

Embodiment 2

[0027] see image 3 The difference between this implementation and Embodiment 1 is that the first end of the voltage doubler capacitor is connected to the negative pole of the input voltage source, the source pole of the switch tube, one end of the output capacitor and one end of the output load, and the rest of the structure is the same as All functions are the same.

Embodiment 3

[0029] see Figure 4 The difference between this implementation and Embodiment 1 is that the first terminal of the voltage doubler capacitor is connected to the cathode of the output diode, one terminal of the output capacitor and one terminal of the output load, and the rest of the structures and functions are the same.

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Abstract

The invention discloses a single switching tube high-grain converter based on a coupling inductance voltage-multiplying unit. The first end of a coupling inductance primary winding is connected with an anode of an input power supply and the first end of a voltage-multiplying capacitor; the first end of a coupling inductance secondary winding is connected with the second end of the voltage-multiplying capacitor; the second end of the coupling inductance primary winding is connected with a drain electrode of a switching tube, an anode of a first follow current diode and the first end of a switching capacitor; the second end of a coupling inductance secondary winding is connected with a cathode of the first follow current diode and an anode of a second follow current diode; an anode of the output diode is connected with a cathode of the second follow current diode and the second end of the switching capacitor; the cathode of the output diode is respectively connected with the first end of the output capacitor and the first end of an output load; and the first end of the coupling inductance primary winding and the second end of the coupling inductance secondary winding are dotted terminals. According to the single switching tube high-grain converter disclosed by the invention, the turn-off voltage peak is inhibited; leakage inductance is recovered; and the grain of energy voltage is high.

Description

technical field [0001] The invention relates to a high-gain converter with a single switching tube, which is suitable for non-isolated high-gain conversion occasions. Background technique [0002] In order to realize the gain expansion of the boost converter, switched capacitor technology can be used. The conventional single-stage switched capacitor structure boost boost converter with extended gain has a simple circuit structure and simple implementation, but it also has the disadvantage of small voltage gain; while the two-stage switched capacitor Boost converter further improves the gain, However, there are still two shortcomings in this converter: firstly, the sharp impact of the switching tube current is large, which greatly increases the current stress and loss of the device; Under the pressure situation, it still cannot meet the boost requirement. For the above-mentioned first point, a small inductance is introduced into the switched capacitor circuit in series to s...

Claims

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Application Information

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IPC IPC(8): H02M3/155H02M1/34
Inventor 赵一石慧秋李武华梅烨李威辰
Owner 杭州浙阳电气有限公司
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