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.

1 . A structure for mounting an inverter circuit used for controlling a motor of a compressor, wherein an inverter circuit section is accommodated in a casing, and said casing is attached to a housing of said compressor.  
   
   
       2 . The mounting structure for an inverter circuit in accordance with  claim 1 , wherein inverter circuit section includes a power switching element for controlling power supply to said motor, and a heat-radiation surface of said power switching element is thermally connected via a heat-radiation member to a coolant introduced into said compressor.  
   
   
       3 . The mounting structure for an inverter circuit in accordance with  claim 1 , wherein said casing accommodates metallic bus bars embedded therein, and said bus bars provide electric path for said inverter circuit section.  
   
   
       4 . The mounting structure for an inverter circuit in accordance with  claim 3 , wherein said bus bars are connected to electrodes, terminals, and joint portions of electric components constituting said inverter circuit section.  
   
   
       5 . The mounting structure for an inverter circuit in accordance with  claim 1 , wherein said casing accommodates metallic bus bars embedded therein, and said bus bars provide electric path between a first circuit section including a power switching element and a second circuit section including electronic control devices that are disposed parallel to each other.  
   
   
       6 . The mounting structure for an inverter circuit in accordance with  claim 2 , wherein said casing accommodates metallic bus bars embedded therein, and distal ends of bus bars protrude from a surface of said casing.  
   
   
       7 . The mounting structure for an inverter circuit in accordance with  claim 2 , wherein said power switching element has one surface on which electrical connection electrodes are collectively disposed, and another surface serving as a heat-radiation surface.  
   
   
       8 . The mounting structure for an inverter circuit in accordance with  claim 3 , wherein said bus bars are made of copper or copper alloy.  
   
   
       9 . A method for mounting an inverter circuit used for controlling a motor of a compressor, comprising the steps of: 
 arranging an inverter circuit section including a power switching element so as to be accommodated in a casing,    disposing a heat-radiation surface of said power switching element so as to be thermally connected via a heat-radiation member to a coolant introduced into said compressor, and    attaching said casing to a housing of said compressor.    
   
   
       10 . The mounting method for an inverter circuit in accordance with  claim 9 , further comprising the steps of: 
 forming a conductor plate into bus bars of a predetermined pattern by press, and integrating said bus bars with a resin by molding.    
   
   
       11 . The mounting method for an inverter circuit in accordance with  claim 9 , further comprising the steps of: 
 inserting a protruding end of the bus bar exposed from said casing into a through-hole of a printed circuit board, and    fixing said protruding end of the bus bar to a joint portion of said printed circuit board by soldering.    
   
   
       12 . A compressor equipped with a motor and an inverter circuit used for controlling said motor, wherein a casing accommodating an inverter circuit section is attached to a housing of said compressor.  
   
   
       13 . The compressor in accordance with  claim 12 , wherein said inverter circuit section includes a power switching element for controlling power supply to said motor, and a heat-radiation surface of said power switching element is thermally connected via a heat-radiation member to a coolant introduced into said compressor.  
   
   
       14 . The compressor in accordance with  claim 13 , wherein said casing accommodates metallic bus bars embedded therein, and said bus bars provide electric path for said inverter circuit section.  
   
   
       15 . The compressor in accordance with  claim 14 , wherein said bus bars are connected to electrodes, terminals, and joint portions of electric components constituting said inverter circuit section.  
   
   
       16 . The compressor in accordance with  claim 13 , wherein said casing accommodates metallic bus bars embedded therein, and said bus bars provide electric path between a first circuit section including a power switching element and a second circuit section including electronic control devices that are disposed parallel to each other.  
   
   
       17 . The compressor in accordance with  claim 13 , wherein said casing accommodates metallic bus bars embedded therein, and distal ends of bus bars protrude from a surface of said casing.  
   
   
       18 . The compressor in accordance with  claim 13 , wherein said power switching element has one surface on which electrical connection electrodes are collectively disposed, and another surface serving as a heat-radiation surface.