Inverter Integrated Electric Compressor

Abstract

Provided is a low-cost compressor having excellent operation stability which enables the improvement of the stability of a control circuit by shielding electromagnetic noise and the effective prevention of the vibration of a control substrate while the design flexibility is maintained at the same high level as that of conventional ones. An inverter-integrated electric compressor in which a motor is incorporated and a high-voltage circuit for motor drive including an inverter and a control substrate provided with a low-voltage circuit for control are provided in a compressor housing is characterized in that a shield plate made of a material capable of shielding an electromagnetic noise emitted from the high-voltage circuit for motor drive toward the low-voltage circuit for control is interposed between the high-voltage circuit for motor drive and the control substrate, and the shield plate and the control substrate are fixed to each other and both are fixed at a predetermined position in the compressor housing.

Description

TECHNICAL FIELD OF THE INVENTION[0001]The present invention relates to an inverter-integrated electric compressor, and specifically relates to an inverter-integrated electric compressor in which its design flexibility is maintained at the same high level as that of conventional ones. The stability of its control circuit can be improved by shielding electromagnetic noise and its control substrate can be effectively prevented from vibrating, so as to achieve an excellent operational stability and low cost.BACKGROUND ART OF THE INVENTION[0002]As for an electric compressor, particularly for an electric compressor mounted on a vehicle, various vibration countermeasures to protect electrical components from malfunctions caused by long-time vibration have been suggested. For example, Patent document 1 discloses a structure of an electric compressor which incorporates a motor drive circuit including an inverter, in which the motor drive circuit is coated with a resin mold material, so as to...

AI Technical Summary

Benefits of technology

[0007]Therefore an object of the present invention is to provide a low-cost compressor having excellent operation stability which can improve the stability of a control circuit by shielding electromagnetic noise and can effectively prevent the vibration of a control substrate while the design flexibility is maintained at the same high level as that of conventional ones.Means for Solving the Problems

[0018]Thus the present invention makes it possible, as its design flexibility is maintained at the same high level as that of conventional ones, that the stability of its control circuit can be improved by shielding electromagnetic noise and its control substrate can be effectively prevented from vibrating, so as to achieve excellent operational stability and low cost.

Problems solved by technology

In addition, an inverter-integrated electric compressor requires a means for shielding electromagnetic noises in case that electromagnetic noises emitted from a high-voltage circuit cause troubles such as malfunction of a control circuit consisting of low-voltage circuits.

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