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Method of driving DC/DC converter, and DC/DC converter

A technology of DC converters and power devices, applied in the direction of output power conversion devices, control/regulation systems, electromechanical devices, etc., can solve the problems of large size, increased cooling water, poor heat dissipation efficiency, etc., to achieve light weight, Good heat dissipation and easy heat dissipation design

Inactive Publication Date: 2009-07-15
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] However, if Figure 19B As shown in , when three transistors are turned on at the same time, in the case of heat transfer from each transistor shown in shade, the heat is concentrated in the double shaded part, and the heat dissipation efficiency is very poor
In order to satisfy heat conditions such as the maximum allowable temperature of the transistor, it is necessary to increase the volume and surface area of ​​the radiator plate 12, and at the same time, it is necessary to increase the flow rate of cooling water for cooling the radiator plate 12, resulting in the size of the DC / DC converter device 16. The problem of upscaling

Method used

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  • Method of driving DC/DC converter, and DC/DC converter
  • Method of driving DC/DC converter, and DC/DC converter
  • Method of driving DC/DC converter, and DC/DC converter

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Embodiment Construction

[0088] Hereinafter, an embodiment of a vehicle or the like to which a DC / DC converter device implementing the driving method of the DC / DC converter device according to the present invention is applied will be described with reference to the drawings.

[0089] figure 1 The fuel cell vehicle 20 according to the present embodiment shown in FIG. The electric motor 26 for driving that supplies current (electric power) from the power supply device through the inverter 34; and between the primary side 1S connected to the battery 24 and the secondary side 2S connected to the fuel cell 22 and the electric motor 26 (inverter 34 ) The DC / DC converter device for voltage conversion {called VCU (Voltage Control Unit). }twenty three.

[0090] The VCU 23 is composed of a DC / DC converter 36 and a converter control unit 54 for driving and controlling the DC / DC converter 36 .

[0091] The fuel cell 22 has, for example, a stacked structure in which a solid polymer electrolyte membrane is sandwic...

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Abstract

The present invention provides a DC / DC converter, a DC / DC converter apparatus, vehicle, fuel cell system and a method for driving DC / DC converter, to resolve minimization of three-phase DC / DC converter. A DC / DC converter (36) comprises a plurality of phase arms (UA, VA, WA), the phase arms (UA, VA, WA) being connected parallel to each other between the cell 24 and the fuel cell 22, each of the phase arms comprises a series-connected circuit of an upper arm switching device (81u, 81v, 81w) and a lower arm switching device (82u, 82v, 82w) and diodes (83u, 83v, 83w, 84u, 84v, 84w) connected inversely. Wherein the phase arms (UA, VA, WA) have respective midpoints connected to each other, and the single reactor (90) is inserted between the connected midpoints. According to the construction, the DC / DC converter (36) may be carried out with conversion of voltage of the phase arm (UA, VA, WA) by using a reactor (90).

Description

technical field [0001] The present invention relates to a DC / DC converter for raising and lowering DC voltage, a DC / DC converter device, a vehicle or a fuel cell system equipped with the DC / DC converter device, and a driving method for the DC / DC converter device. Background technique [0002] Conventionally, DC / DC converter devices, which are switching power supplies using switching elements such as MOSFETs and IGBTs, have been widely used. [0003] For example, as one form of a vehicle using an electric motor as a driving source for travel, a vehicle equipped with a DC / DC converter device for stepping up or down DC voltage between a power storage device and an inverter-driven motor has been proposed (herein , known as electric vehicles). In this electric vehicle, when the motor is driven, the voltage of the power storage device is boosted by the DC / DC converter and applied to the inverter, and when the motor is regenerated, the regenerative voltage generated in the inverte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02K7/00B60L11/18
CPCY02T10/7241Y02T10/641Y02T10/7216Y02T10/64
Inventor 竹中秀和曾根利浩
Owner HONDA MOTOR CO LTD
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