Power conversion device with reduced wiring distance

• US 9,614,454 B2
• Filed: 05/07/2012
• Issued: 04/04/2017
• Est. Priority Date: 05/31/2011
• Status: Active Grant

• Current Assignee: Nagaoka University of Technology, Nissan Motor Co., Ltd.
• Original Assignee: Nagaoka University of Technology, Nissan Motor Co., Ltd.
• Inventors: Koyano, Hironori, Nakamura, Takamasa, Saito, Masao, Yamamoto, Kouji, Matsukawa, Tsutomu, Koshijo, Manabu, Itoh, Junichi, Ohnuma, Yoshiya
• Primary Examiner(s): Finch, III, Fred E
• Application Number:
  US14/122,413
• Publication Number:
  US 20140104913A1
• Time in Patent Office: 1,793 Days
• CPC Class Codes: H02M 1/4258 using a single converter stage both for correction of AC input power factor and generation of a regulated and galvanically isolated DC output voltage H02M1/4241 takes precedence
• CPC Class Codes: H02M 5/293 using semiconductor devices only
• CPC Class Codes: H02M 5/297 for conversion of frequency
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H05K 7/1432 specially adapted for power drive units or power converters
• CPC Class Codes: H05K 7/14329 specially adapted for the configuration of power bus bars
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

Provided is a power converter 3 that directly converts polyphase AC power to AC power. A converter circuit has a plurality of switching elements 311, 313, 315, 312, 314 and 316 which are connected to each phase R, S or T of the polyphase AC power to enable switching for turning on current-carrying bidirectionally. At least three condensers 821 to 826 are provided between phases of the converter circuit. The three condensers are respectively placed at apexes of a triangle on a plane that is in parallel with a part-mounting surface on which the switching elements are actually mounted. The wiring distance between the condensers and the switching elements can be shortened.

Claims

1. A power converter that directly converts polyphase AC power to AC power, the power converter comprising:

a converter circuit including a plurality of switching elements that are connected to each phase of the polyphase AC power to enable switching for turning on current-carrying bidirectionally; and

at least three condensers connected to the converter circuit,

wherein;

the plurality of switching elements are adjacently arranged in such a manner that respective input terminals of switching elements of the plurality of switching elements form a first line in a first arrangement direction and respective output terminals of said switching elements of the plurality of switching elements form another line in parallel with the first line;

the three condensers are respectively placed at apexes of a triangle on a plane that is above and in parallel with a part-mounting surface on which the plurality of switching elements are actually mounted; and

two of the three condensers are adjacently placed and arranged along the first arrangement direction and the remaining one of the three condensers is arranged outside the two condensers with respect to the position of the output terminals.

2. A power converter as claimed in claim 1, in which each of the three condensers is disposed between phases of the polyphase AC power that is applied to said switching elements of the plurality of switching elements, and outside connecting terminals of each of the two condensers are arranged to put therebetween a line that connects a plurality of input terminals arranged in a line.

3. A power converter as claimed in claim 2, in which outside connecting terminals of the remaining one condenser are arranged on a line that is in parallel with the first arrangement direction.

4. A power converter as claimed in claim 1, further comprising:

three bus bars that are arranged side by side and extend outward respectively from three switching elements of the plurality of switching elements, arranged side by side,

wherein a first one of the three condensers is arranged between the center one of the three bus bars and one of the outside two of the three bus bars,

a second one of the three condensers is arranged between the center one of the three bus bars and the other one of the outside two of the three bus bars, and

a third condenser of the three condensers is arranged between the outside two of the three bus bars, the third condenser being placed outside the first and second condensers with respect to the position where the output terminals are placed.

5. A power converter as claimed in claim 4, in which the three bus bars are positioned above three switching elements and the first, second and third condensers are positioned above these bus bars.

6. A power converter that directly converts polyphase AC power to AC power, the power converter comprising:

a converter circuit including a plurality of switching elements that are connected to each phase of the polyphase AC power to enable switching for turning on current-carrying bidirectinally; and

at least three condensers connected to the converter circuit,

wherein;

the plurality of switching elements are adjacently arranged in such a manner that respective input terminals of switching elements of the plurality of switching elements form a first line in a first arrangement direction and respective output terminals of said switching elements of the plurality of switching elements form another line in parallel with the first line;

the three condensers are respectively placed at apexes of a triangle on a plane that is in parallel with a part-mounting surface on which the plurality of switching elements are actually mounted;

two of the three condensers are adjacently placed and arranged along the first arrangement direction and the remaining one of the three condensers is arranged outside the two condensers with respect to the position of the output terminals; and

at least one part of the triangle is overlapped with said switching elements along a direction perpendicular to the part-mounting surface.