Power conversion circuit board, and electric compressor

• US 10,218,288 B2
• Filed: 02/15/2016
• Issued: 02/26/2019
• Est. Priority Date: 03/23/2015
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries Thermal Systems, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries Thermal Systems, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Inventors: Hattori, Makoto, Kamitani, Hiroyuki, Higuchi, Hiroto
• Primary Examiner(s): Patel, Rajnikant
• Application Number:
  US15/559,607
• Publication Number:
  US 20180069487A1
• Time in Patent Office: 1,107 Days
• Field of Search: 363 16- 20, 363 98, 363132, 318807, 318812, 361 22, 361 23, 361 25
• CPC Class Codes: F04B 2203/0204 Frequency of the electric current
• CPC Class Codes: F04B 35/04 the means being electric
• CPC Class Codes: F04B 39/00 Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
• CPC Class Codes: F04B 39/121 Casings
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H02M 7/48 using discharge tubes with control electrode or semiconductor devices with control electrode
• CPC Class Codes: H02P 27/06 using dc to ac converters or inverters H02P27/05 takes precedence
• CPC Class Codes: H05K 1/02 Details
• CPC Class Codes: H05K 1/0262 Arrangements for regulating voltages or for using plural voltages
• CPC Class Codes: H05K 1/0263 High current adaptations, e.g. printed high current conductors or using auxiliary non-printed means; Fine and coarse circuit patterns on one circuit board H05K1/0293 takes precedence
• CPC Class Codes: H05K 2201/10166 Transistor
• CPC Class Codes: H05K 2201/10189 Non-printed connector
• CPC Class Codes: H05K 2201/10272 Busbars, i.e. thick metal bars mounted on the PCB as high-current conductors metal strips H05K2201/1028

Abstract

A power conversion circuit board (1) is a board on which a power conversion circuit which converts direct current to alternating current is mounted. A low voltage circuit (10b) to which a low voltage is applied and a high voltage circuit (10a) to which a high voltage is applied are separately disposed in different areas on the same board surface. Further, the high voltage circuit (10a) includes a bus bar in which a part of a wiring is formed on the board surface and another wiring is provided with a predetermined distance from the board surface.

Claims

1. A power conversion circuit board on which a power conversion circuit configured to convert direct current to alternating current is mounted,

wherein a low voltage circuit to which a low voltage is applied and a high voltage circuit to which a high voltage is applied are separately disposed in different areas on the same board surface, and

in the high voltage circuit, a wiring from a high voltage input terminal to a switching element is formed on the board surface, and a wiring from the switching element to a high voltage output terminal comprises a bus bar which is provided at a predetermined distance from the board surface, and

wherein the wiring from the high voltage input terminal to the switching element and the wiring from the switching element to the high voltage output terminal are disposed to three-dimensionally intersect with each other.

2. The power conversion circuit board according to claim 1, wherein at least a part of an RC circuit is provided in a space provided between the wiring from the high voltage input terminal to the switching element and the wiring from the switching element to the high voltage output terminal.

3. An electric compressor comprising:

the power conversion circuit board according to claim 1; and

a motor which operates on the basis of AC power supplied from the power conversion circuit board.

4. An electric compressor comprising:

the power conversion circuit board according to claim 2; and

a motor which operates on the basis of AC power supplied from the power conversion circuit board.