DC-DC power conversion apparatus

A power conversion device and power transmission technology, applied in the direction of output power conversion device, conversion of DC power input to DC power output, conversion of AC power input to DC power output, etc., can solve the problem of increased volume and weight of inductors, DC/ The volume and weight of the DC power conversion device increase, and the effect of improving the power conversion efficiency is achieved.

Active Publication Date: 2013-03-06
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the inductance value is increased, the volume and weight of the inductor increase according

Method used

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Experimental program
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Effect test

Embodiment approach 1

[0036] figure 1 It is a circuit diagram showing the main circuit configuration of the DC / DC power converter 10 according to Embodiment 1 of the present invention.

[0037] The DC / DC power conversion device 10 in Embodiment 1 is a bidirectional DC / DC power conversion device that has the following function: convert the DC voltage V0 input between the voltage terminal VL and the voltage terminal VN into a boosted DC voltage V2, the boost function output between the voltage terminal VH and the voltage terminal VN; and the DC voltage V2 input between the voltage terminal VH and the voltage terminal VN is converted into a step-down DC voltage V0, which is connected between the voltage terminal VL and the voltage Buck function of the output between terminals VN.

[0038] figure 1 Among them, the main circuit of the DC / DC power conversion device 10 includes: smoothing capacitors (smoothing condenser) C0, C2 for smoothing the input and output DC voltages V0, V2; smoothing capacitor C...

Embodiment approach 2

[0314] Figure 10 It is a circuit diagram showing the configuration of a main circuit of a DC / DC power converter according to Embodiment 2 of the present invention.

[0315] The DC / DC power conversion device 40 in Embodiment 2 is a bidirectional DC / DC power conversion device, which has the following function: convert the DC voltage V0 input between the voltage terminal VL and the voltage terminal VN into a boosted DC voltage Voltage V2, the boost function output between the voltage terminal VH and the voltage terminal VN2; and the DC voltage V2 input between the voltage terminal VH and the voltage terminal VN2 is converted into a step-down DC voltage V0, between the voltage terminal VL and the voltage terminal VN2 Step-down function for output between voltage terminals VN.

[0316] Such as Figure 10 As shown, the connection structure of the main circuit of the DC / DC power conversion device 40 according to Embodiment 2 is different from that of figure 1 The DC / DC power conv...

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PUM

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Abstract

Disclosed is a DC-DC power conversion apparatus (10) comprising two or more switching units (SU1, SU2) each of which is further comprised of two semiconductor switching elements (Sa, Sb), and wherein each of the semiconductor switching elements (S1a, S1b, S2a, S2b) of each of the switching units are all connected in series, and which also comprises an energy transition capacitor (C1) for conducting charging/discharging, and an inductor (L). The DC-DC power conversion apparatus (10) is also provided with a control unit that makes the semiconductor switching elements execute operations in four types of switching modes, according to the ratio (V2/V0) of the input/output voltages of the power conversion apparatus and the direction of the power transmission, and that also makes the elements carry out a current-discontinuing operation wherein the inductor current will become zero during switching operation, upon low load.

Description

technical field [0001] The invention relates to a DC / DC power conversion device for converting a direct current voltage into a boosted or stepped down direct current voltage. Background technique [0002] As a conventional DC / DC power conversion device, there is known a device that has two or more switching units, each switching unit is composed of two semiconductor switching elements that perform switching operations in a complementary manner, and the semiconductor switching elements of each switching unit All are connected in series; there is also a capacitor for energy transfer, and a structure of inductance, and DC / DC conversion is performed by charging and discharging the capacitor for energy transfer according to the switching action of the semiconductor switching element of each switching unit, and it is known : A low withstand voltage semiconductor switching element and a small inductor can be used, and the ratio of the input voltage to the output voltage can be adju...

Claims

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Application Information

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IPC IPC(8): H02M3/155
CPCH02M3/158H02M7/4837
Inventor 池田又彦小林胜前川博敏森武直纪三井贵夫
Owner MITSUBISHI ELECTRIC CORP
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