Inverter-integrated motor for an automotive vehicle

Abstract

A bus-bar integrated plate and outer frame section, arranged into a double-deck structure and having numerous bus bars molded with a resin molding plate portion, is provided as a wiring for connecting power switching elements and a smoothing capacitor, fixed on an outer surface of a cylindrical wall of a motor housing, to a printed circuit board serving as a control circuit.

Description

[0001] This is a Division of application Ser. No. 10 / 422,958 filed Apr. 25, 2003. The entire disclosure of the prior application is hereby incorporated by reference herein in its entirety.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an inverter-integrated motor for an automotive vehicle, and more particularly relates to the improvement of its inverter section. [0004] 2. Description of the Background Art [0005] To maintain the condition of an air-conditioning system when an engine is temporarily stopped during a short period of time (e.g., during a so-called “idling stop” operation), it is conventionally known that a motor-driven compressor is preferably employed for a refrigerating cycle system of an automotive vehicle. Furthermore, it is conventionally known that a motor section of the motor-driven compressor is cooled by a low-pressure coolant gas. [0006] Furthermore, there is a conventional motor-driven compressor having an ...

AI Technical Summary

Benefits of technology

This configuration achieves a compact, lightweight inverter section with improved anti-vibration properties, simplified wiring, and effective cooling, enabling easier installation in limited engine room spaces while maintaining performance.

Problems solved by technology

It is hence difficult to replace the conventional belt-driven compressor by the above-described inverter-integrated motor-driven compressor.

The processes and the costs will increase.

Furthermore, the engine room capacity or volume available for the devices associated with the engine tends to decrease.

It was however difficult to cool the inverter section when it is placed adjacent to the motor section.

However, it is not easy to effectively guide or introduce the cooling air or the low-temperature coolant gas toward the inverter section in the axial direction via a branched or bent route or passage of flow.

This will necessarily increase the circumferential and axial size of the apparatus.

The wiring work will become complicated.

In this respect, there is a limit in realizing a high-density wiring, i.e., in realizing the downsizing of the inverter section.

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