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Double-Y source high step-up ratio DC-DC converter

A DC-DC, high step-up ratio technology, applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, etc., can solve the problem of excessive starting current, discontinuous input current, and unsatisfactory boost ratio. etc. to achieve the effect of smooth input current and gentle startup

Inactive Publication Date: 2021-02-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a DC-DC converter with dual Y sources and high boost ratio in order to overcome the problems of discontinuous input current, excessive starting current and unsatisfactory boost ratio of existing Y source boost converters. device

Method used

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specific Embodiment approach 1

[0044] Specific implementation mode one, a kind of double Y source high step-up ratio DC-DC converter of this implementation mode, such as figure 1 As shown, its core components are two Y-type coupled inductors with different modes and a capacitor C 2 (Capacitance C 2_U and capacitance C 2_B ) and diode D 1 (diode D 1_U and diode D 1_B ) constitutes a voltage clamping circuit.

[0045] When the device works, it is divided into direct mode and non-straight mode. The equivalent circuit is as follows Figure 2 ~ Figure 3 shown. In pass-through mode, such as figure 2As shown, the switch tube is closed and the diode is cut off. For the upper half of the circuit, the current flows through the input inductor L in_U For capacitance C 2_U charging; winding N in the coupled inductor 2_U , N 3_U voltage is capacitive C 1_U Clamped.

[0046] While in the non-straight-through state, such as image 3 As shown, the switch tube is turned off and the diode is turned on. For th...

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Abstract

Relating to a direct-current converter, the invention discloses a double-Y source high step-up ratio DC-DC converter, and aims to solve the problems that an existing Y-source step-up converter is discontinuous in input current and overlarge in starting current, and the step-up ratio cannot meet requirements. The double-Y source high step-up ratio DC-DC converter comprises a first Y-source conversion sub-circuit and a second Y-source conversion sub-circuit, and the working modes of the first Y-source conversion sub-circuit and the second Y-source conversion sub-circuit comprise a straight-through working mode and a non-straight-through working mode.

Description

technical field [0001] The invention relates to a DC converter, in particular to a Y-source DC converter. Background technique [0002] Since the impedance source converter was proposed, due to its simple structure, single-stage step-up, reducing the number of power conversion stages of the converter system, and improving system performance, it has attracted extensive attention in the topology of power electronic converters. The Y source converter is composed of 3 closely coupled windings with high voltage gain. However, there are still some problems in the Y-source converter, such as discontinuous input current, too large starting current, and the boost ratio cannot meet the demand and so on. Contents of the invention [0003] The purpose of the present invention is to provide a dual Y-source high boost ratio DC-DC conversion in order to overcome the problems of discontinuous input current, excessive starting current and unsatisfactory boost ratio of existing Y source bo...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M1/14
CPCH02M1/14H02M3/33569H02M3/33576
Inventor 管乐诗姚婷婷程青王卫徐殿国
Owner HARBIN INST OF TECH
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