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Boost converter comprising output current compensation branch

An output current, boost type technology, used in output power conversion devices, regulating electrical variables, high-efficiency power electronic conversion, etc., can solve performance impact, poor pulsating current tolerance, reduce circuit dynamic response speed and overall efficiency. and other problems to achieve the effect of improving efficiency and improving output voltage ripple

Pending Publication Date: 2019-08-27
ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, common aluminum electrolytic capacitors have poor tolerance to pulsating current, and their performance is seriously affected by temperature; common filters (such as: LC filters) will reduce the dynamic response speed and overall efficiency of the circuit

Method used

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  • Boost converter comprising output current compensation branch
  • Boost converter comprising output current compensation branch
  • Boost converter comprising output current compensation branch

Examples

Experimental program
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Effect test

Embodiment 1

[0035] refer to figure 1, a boost converter with an output current compensation branch, including an inductor L1, an N-channel MOS transistor M1, a diode D1, a capacitor Co, an output current compensation branch and a controller, the current compensation branch has a port a, port b and port c, the controller has port g and port c, the positive end of the DC power supply Vi is connected to one end of the inductance L1, and the other end of the inductance L1 is simultaneously connected to the drain and output of the N-channel MOS transistor M1 The port a of the current compensation branch is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the port b of the output current compensation branch, one end of the capacitor Co and one end of the load RL at the same time, and the other end of the load RL is connected to the capacitor Co at the same time. The other end is connected to the source of the N-channel MOS transistor M1 and the negative te...

Embodiment 2

[0046] refer to figure 1 , image 3 with Image 6 , a boost converter with an output current compensation branch, the output current compensation branch includes an inductor Lb1, an inductor Lb2, an N-channel MOS transistor Mb1 and a diode Db1, one end of the inductor Lb1 is connected to the output current compensation branch port a, the other end of the inductor Lb1 is connected to the drain of the N-channel MOS transistor Mb1, the source of the N-channel MOS transistor Mb1 is simultaneously connected to the source of the N-channel MOS transistor M1 and one end of the inductor Lb2, and the inductor Lb2 The other end of the diode Db1 is connected to the anode of the diode Db1, the cathode of the diode Db1 is connected to the port b of the output current compensation branch, the gate of the N-channel MOS transistor Mb1 is connected to the port c of the output current compensation branch, the inductor Lb1 and the inductor Lb2 There is a coupling relationship, and one end of th...

Embodiment 3

[0051] refer to figure 1 , Figure 4 with Image 6 , a step-up converter with an output current compensation branch. The output current compensation branch includes an inductor Lc1, an inductor Lc2, an N-channel MOS transistor Mc1 and a diode Dc1. One end of the inductor Lc1 is connected to the output current compensation branch. The other end of the inductor Lc1 is connected to the drain of the N-channel MOS transistor Mc1 and one end of the inductor Lc2 at the same time, the other end of the inductor Lc2 is connected to the anode of the diode Dc1, and the cathode of the diode Dc1 is connected to the output current compensation branch. The port b is connected, the source of the N-channel MOS transistor Mc1 is connected to the source of the N-channel MOS transistor M1, the gate of the N-channel MOS transistor Mc1 is connected to the port c of the output current compensation branch, the inductor Lc1 and the inductor Lc2 There is a coupling relationship, and one end of the ind...

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PUM

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Abstract

A boost converter comprising output current compensation branch comprises an inductor L1, an N-channel MOS tube M1, a diode D1, a capacitor C0, the output current compensation branch and a controller;in the output current compensation branch, a part of current is divided from the inductor L1 by a port a of the N-channel MOS tube M1 and is used for storing energy when the N-channel MOS tube M1 iscut off; when the N-channel MOS tube M1 is conducted, the energy is released by a port b of the N-channel MOS tube M1, and the current is provided for the capacitor C0 and a load RL; and the controller employs a soft switch controller, a switch state of the N-channel MOS tube M1 is controlled by a port g of the N-channel MOS tube M1, and a working condition of energy storage or relief of the output current compensation branch is controlled by a port c of the N-channel MOS tube M1. The boost converter has the characteristics of low output voltage ripple and high efficiency.

Description

technical field [0001] The invention relates to a step-up converter, especially a step-up converter with an output current compensation branch, which not only has a small output voltage ripple, but also works in a soft switching state, and is suitable for low output voltage ripple and high-efficiency applications. Background technique [0002] The output current (referring to the current flowing through the freewheeling diode to the output terminal) of the traditional Boost converter is discontinuous, and this characteristic will cause its output voltage ripple to be large. To obtain a smaller output voltage ripple, the usual method is to increase the capacity of the output electrolytic capacitor or add a filter. However, common aluminum electrolytic capacitors have poor tolerance to pulsating currents, and their performance is seriously affected by temperature; common filters (such as: LC filters) will reduce the dynamic response speed and overall efficiency of the circuit...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02M1/14
CPCH02M3/156H02M1/143H02M1/0058H02M3/1557Y02B70/10
Inventor 陈怡张聚杜树旺
Owner ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
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