Inverter-integrated electric compressor

• US 7,973,439 B2
• Filed: 11/04/2008
• Issued: 07/05/2011
• Est. Priority Date: 11/06/2007
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Nakano, Koji, Watanabe, Takayuki, Hattori, Makoto, Nakagami, Takashi
• Primary Examiner(s): Lam; Thanh
• Application Number:
  US12/442,788
• Publication Number:
  US 20100181877A1
• Time in Patent Office: 973 Days
• Field of Search: 310/71, 310/68.R, 310/68.D, 310/89
• US Class Current: 310/71
• CPC Class Codes: F04B 35/04 the means being electric
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 7/14 Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06
• 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 7/14322 wherein the control and power circuits of a power converter are arranged within the same casing

Abstract

Provided is an inverter-integrated electric compressor capable of reducing the size of an inverter accommodating section by modularizing a power circuit board and a control board and further reducing the size of an inverter device, as well as an accommodating section thereof, by improving the positional structure with respect to other electrical components. An inverter-integrated electric compressor including an inverter accommodating section provided on a periphery of a housing accommodating an inverter device includes an inverter module constructed by integrally modularizing a power circuit board and a control board, wherein attachment legs provided on both edges of at least one side surface of the inverter module protrude outward from a module main body, and the inverter module accommodates the inverter accommodating section with the attachment legs positioned in spaces at both ends of a glass-insulated terminal.

Claims

1. An inverter-integrated electric compressor in which an inverter accommodating section is provided on a periphery of a housing accommodating an electric motor and a compressing mechanism, and an inverter device that converts DC power supplied from a high-voltage power supply into three-phase AC power and supplies the three-phase AC power to the electric motor in the housing via a glass-insulated terminal is accommodated inside thereof,

wherein the inverter device includes an inverter module constructed by integrally modularizing a power circuit board on which a semiconductor switching device and so on are mounted and a control board on which control and communication circuits and so on operating at low voltage are mounted,

wherein attachment legs protruding outward from a module main body are provided at both ends of at least one side surface of the inverter module, and

wherein the inverter module is accommodated in the inverter accommodating section by positioning the attachment legs in spaces at both ends of the glass-insulated terminal.

2. The inverter-integrated electric compressor according to claim 1, wherein the inverter module is substantially cuboid, and the attachment legs provided at both ends of two opposing side surfaces thereof all protrude outward from the module main body.

3. The inverter-integrated electric compressor according to claim 2, wherein other electrical component constituting the inverter device are positioned in a space between the attachment legs provided on the other side surfaces of the two opposing side surfaces of the inverter module.

4. The inverter-integrated electric compressor according to claim 2, wherein the attachment legs provided on each side surfaces of the two opposing side surfaces of the inverter module are positioned with an offset in a direction orthogonal to a motor axis direction of the electric motor with respect to the module main body.

5. The inverter-integrated electric compressor according to claim 3, wherein the attachment legs provided on each side surfaces of the two opposing side surfaces of the inverter module are positioned with an offset in a direction orthogonal to a motor axis direction of the electric motor with respect to the module main body.