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.

1 . 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, wherein a shield plate made of a material capable of shielding an electromagnetic noise emitted from said high-voltage circuit for motor drive toward said low-voltage circuit for control is interposed between said high-voltage circuit for motor drive and said control substrate, and said shield plate and said control substrate are fixed to each other and both are fixed at a predetermined position in said compressor housing. 
     
     
         2 . The inverter-integrated electric compressor according to  claim 1 , wherein said shield plate is provided with a rib. 
     
     
         3 . The inverter-integrated electric compressor according to  claim 1 , wherein at least a part of a fixing section of said shield plate to said control substrate is formed in a convex shape which is protruded toward said control substrate. 
     
     
         4 . The inverter-integrated electric compressor according to  claim 1 , wherein said high-voltage circuit for motor drive is provided with a noise filter at a power supply side, and said shield plate is constructed so as to be able to shield also an electromagnetic noise emitted from said noise filter toward said low-voltage circuit for control. 
     
     
         5 . The inverter-integrated electric compressor according to  claim 1 , wherein said high-voltage circuit for motor drive is connected with a power source wire, and said shield plate is constructed so as to be able to shield also an electromagnetic noise emitted from said power source wire toward said low-voltage circuit for control. 
     
     
         6 . The inverter-integrated electric compressor according to  claim 1 , wherein an electric component including said high-voltage circuit for motor drive and said control substrate is provided in a housing space surrounded by said compressor housing, a structure is given where a resin is filled in said housing space after assembling and where at least a part of said electric component is sealed with a filled resin having been solidified, and a hole for venting air is provided in said shield plate to fill said resin uniformly into said housing space. 
     
     
         7 . The inverter-integrated electric compressor according to  claim 6 , wherein said shield plate is provided with a hole for filling said resin. 
     
     
         8 . The inverter-integrated electric compressor according to  claim 1 , wherein said compressor is one mounted on a vehicle. 
     
     
         9 . The inverter-integrated electric compressor according to  claim 8 , wherein said compressor is one for an air conditioning system for vehicles.