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Power converter

A technology for power converters and reactors, applied in electrochemical generators, modification of power electronics, transformation of structural parts of equipment, etc., can solve the problem of reducing the distance between the reactor and the current sensor, reducing the measurement accuracy and increasing the influence question

Pending Publication Date: 2021-09-14
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the magnetic flux leaked from the reactor reduces the measurement accuracy of the current value measured by the current sensor
As the distance between the reactor and the current sensor decreases due to the size reduction of the power converter, the influence of the leakage flux from the reactor on the current sensor increases

Method used

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Embodiment Construction

[0029] Embodiments of the present invention are described below with reference to the drawings. It should be noted that when a number (such as the number, amount, total amount or range of elements) is mentioned in the following embodiments, the present invention is not limited to the number mentioned unless the number is particularly clearly indicated or the elements are clearly indicated as this number. In addition, the structures and the like described in the following embodiments are not necessarily essential to the present invention unless specifically specifically indicated or clearly indicated in principle.

[0030] figure 1 is a schematic diagram of the drive train of a fuel cell vehicle. A fuel cell vehicle is a vehicle configured to run with driving force generated by the electric motor 2 by driving the electric motor 2 with electricity generated by the fuel cell stack 9 . The electric motor 2 is a motor generator capable of operating as a generator. The battery 6...

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PUM

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Abstract

The invention relates to a power converter. A current sensor is provided on a bus bar via which a reactor is connected to a power module. The reactor is separated from the current sensor by a partition made of metal having a magnetic shielding effect. An output terminal of the reactor is provided on either one of a surface of the reactor on a first side and a surface of the reactor on a second side, the first side being farther from a mounting surface of a power converter across a plane passing through the center of the reactor, the second side being closer to the mounting surface from the plane.

Description

technical field [0001] The present invention relates to a power converter to be provided in a fuel cell unit. Background technique [0002] For example, a power converter provided in a fuel cell unit is known as described in Japanese Unexamined Patent Application Publication No. 2012-105369 (JP 2012-105369A). Fuel cell units to be provided in electric vehicles need to be further downsized due to the space limitation of the installation space in the vehicle. This requirement also applies to the power converter constituting the fuel cell unit. [0003] The power converter includes reactors. Among the constituent parts provided in the power converter, the temperature of the reactor is particularly likely to become high due to heat generation due to core loss and heat generation due to conduction loss of the coil. As the size of the power converter decreases, the influence on the constituent parts, especially the influence on the current sensor becomes greater. The current s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H05K7/20H02P27/06
CPCH02M1/00H05K7/20927H05K7/20909H02P27/06H02M7/003H02M1/0009H01M2250/20H01M16/006H05K9/0037Y02E60/10H02M7/48H05K7/209H01M8/04
Inventor 林笃史山崎宏美林和辉
Owner DENSO CORP