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Power converter

A technology for power converters and bus bars, which is used in output power conversion devices, conversion of AC power input to DC power output, and electrical solid devices, etc., can solve problems such as temperature rise of smoothing capacitors

Active Publication Date: 2018-12-14
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, existing power converters limit the temperature rise of smoothing capacitors

Method used

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Examples

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no. 1 example

[0039] Refer to the following Figure 1 to Figure 9 The power converter 1 according to the first embodiment will be described.

[0040] For example, refer to Figure 1 to Figure 9 , the power converter 1 includes a semiconductor module 2 , a smoothing capacitor module 3 , a pair of DC bus bars 4 and a discharge resistor 5 . Each semiconductor module 2 incorporates a semiconductor element 20 such as an insulated gate bipolar transistor (IGBT), which constitutes the power converter circuit 10 . The smoothing capacitor module 3 is operable to smooth the DC voltage applied to the semiconductor module 2 .

[0041] The DC bus bar 4 includes a positive bus bar 4P and a negative bus bar 4N. The semiconductor module 2 and the smoothing capacitor module 3 are electrically connected to each other through a positive bus bar 4P and a negative bus bar 4N. The discharge resistor 5 is connected in parallel to the smoothing capacitor module 3 via the positive bus bar 4P and the negative bu...

no. 2 example

[0149] Refer to the following Figure 10 and Figure 11 , the power converter 1A according to the second embodiment of the present disclosure will be described. The configuration and function of the power converter 1A according to the second embodiment differ from those of the power converter 1 according to the first embodiment mainly in the following points. Therefore, different points are mainly described below.

[0150] Smoothing Capacitor Module 3 A and positive bus bar 4A P and negative bus bar 4A N integrally formed.

[0151] The smoothing capacitive module 3A includes a common positive electrode 30 P , universal negative electrode 30 N , capacitor unit 31, plate-shaped positive terminal 32A P , Plate-shaped negative terminal 32A N , a substantially rectangular parallelepiped housing 33 and a packing member 34 , the components of the above-mentioned smoothing capacitor module 3A are substantially the same as the corresponding components of the smoothing capacito...

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Abstract

A power converter is provided. A semiconductor module incorporates therein a semiconductor element constituting a power converter circuit. A smoothing capacitor is configured to smooth a direct-current voltage applied to the semiconductor module. A pair of positive and negative busbars is configured to electrically connect the semiconductor module and the smoothing capacitor. The positive and negative busbars are arranged to face each other with a predetermined space therebetween. A discharge resistor is connected in parallel with the smoothing capacitor via the positive and negative busbars,and is configured such that an electrical charge stored in the smoothing capacitor flows through the discharge resistor as a discharge current. The positive and negative busbars are interposed betweenthe discharge resistor and the smoothing capacitor.

Description

technical field [0001] The present invention relates to power converters each including: a smoothing capacitor for smoothing a direct current (DC) voltage into an alternating current (AC) voltage; and a discharge resistor connected in parallel to the smoothing capacitor. Background technique [0002] A power converter that converts direct current to alternating current and / or converts alternating current to direct current includes semiconductor modules in which semiconductor elements such as insulated gate bipolar transistors (IGBTs) are integrated. The power converter also includes smoothing capacitors electrically connected to the semiconductor modules. Japanese Patent Application Publication No. 2012-217322, also known as published patent document, is an example of such a power converter. [0003] The power converter disclosed in the published patent document, which is also referred to as a conventional power converter, performs switching operation of semiconductor eleme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/00H01L23/46
CPCH01L23/46H02M7/003H05K7/20927H02M7/53875H01L23/40H01L23/4012H02P2201/09H02P5/74H02M7/5387H05K7/14329H05K7/2089H05K5/04H05K7/1432
Inventor 高橋伸尭木内裕也檜田健史郎
Owner DENSO CORP