Inverter-integrated motor for an automotive vehicle
First Claim
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1. An inverter-integrated motor-driven compressor for an automotive vehicle, comprising:
- a compressor section constituting part of a refrigerating cycle apparatus;
a motor section integrally connected to said compressor section for driving said compressor section;
a housing for accommodating said compressor section and said motor section; and
an inverter circuit section including a predetermined number of power switching elements for converting direct-current power into three-phase alternating-current power and supplying the converted alternating-current power to said motor section,wherein said motor section is cooled by a low-pressure coolant gas,said power switching elements are constituted by discrete transistors corresponding to each of phases, each discrete transistor having a side surface from which electrode terminals of the discrete transitor protrude and a flat bottom surface directly placed on an outer surface of a wall of said housing at a portion surrounding said motor section,the wall of the housing has both a mounting base portion having a flat mounting base surface and a stepped flat portion protruded along a radial direction of the motor section so as to be raised from the flat mounting base surface toward an outer side of the motor section, the flat bottom surfaces of the discrete transistors being fixedly placed on the flat mounting base surface of the mounting base portion,each of groups of discrete transistors have mutually different phases and are disposed in a line along an axial direction of the motor section,two discrete transistors corresponding to each of the phases are disposed adjacent to each other along a circumferential direction of the motor section through a wiring region in which the electrode terminals of one discrete transistor face the electrode terminals of the other discrete transistor, andthe wiring region is placed on the stepped flat portion of the wall of the housing.
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Accused Products
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.
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Citations
18 Claims
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1. An inverter-integrated motor-driven compressor for an automotive vehicle, comprising:
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a compressor section constituting part of a refrigerating cycle apparatus; a motor section integrally connected to said compressor section for driving said compressor section; a housing for accommodating said compressor section and said motor section; and an inverter circuit section including a predetermined number of power switching elements for converting direct-current power into three-phase alternating-current power and supplying the converted alternating-current power to said motor section, wherein said motor section is cooled by a low-pressure coolant gas, said power switching elements are constituted by discrete transistors corresponding to each of phases, each discrete transistor having a side surface from which electrode terminals of the discrete transitor protrude and a flat bottom surface directly placed on an outer surface of a wall of said housing at a portion surrounding said motor section, the wall of the housing has both a mounting base portion having a flat mounting base surface and a stepped flat portion protruded along a radial direction of the motor section so as to be raised from the flat mounting base surface toward an outer side of the motor section, the flat bottom surfaces of the discrete transistors being fixedly placed on the flat mounting base surface of the mounting base portion, each of groups of discrete transistors have mutually different phases and are disposed in a line along an axial direction of the motor section, two discrete transistors corresponding to each of the phases are disposed adjacent to each other along a circumferential direction of the motor section through a wiring region in which the electrode terminals of one discrete transistor face the electrode terminals of the other discrete transistor, and the wiring region is placed on the stepped flat portion of the wall of the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 14, 15, 16)
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9. An inverter-integrated motor-driven compressor for an automotive vehicle, comprising:
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a compressor section constituting part of a refrigerating cycle apparatus; a motor section integrally connected to said compressor section for driving said compressor section; a housing for accommodating said compressor section and said motor section; an inverter circuit section including a predetermined number of power switching elements for converting direct-current power into multi-phase alternating-current power and supplying the converted alternating-current power to said motor section; an inverter casing fixed on an upper end portion of an outer cylindrical wall of said housing for accommodating said inverter circuit section; a motor power connector being detachably connected to a cable power connector of a power cable supplying electric power to said inverter circuit section; and a motor communication connector being detachably connected to a cable communication connector of a communication cable constituting a communication path between said inverter circuit section and an external electronic device, wherein said motor power connector and said motor communication connector protrude upward from a top surface of said inverter casing fixed on the upper end portion of the outer cylindrical wall of said housing. - View Dependent Claims (10, 11, 17)
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12. An inverter-integrated motor-driven compressor for an automotive vehicle, comprising a housing, a motor-driven compressor accommodated in said housing, and an inverter circuit section fixed to said housing for converting direct-current power into multi-phase alternating-current power and supplying the converted alternating-current power to said motor-driven compressor,
wherein said inverter circuit section comprises power switching elements constituting respective arms of a multi-phase inverter circuit, a smoothing capacitor connected between a pair of direct-current input terminals of said multi-phase inverter circuit, a control circuit for controlling said power switching elements, and a wiring section for connecting said power switching elements, said smoothing capacitor, and said control circuit, an inverter casing for accommodating said inverter circuit section is constituted by a metallic frame portion surrounding said inverter circuit section and protruding from an outer cylindrical surface of said housing, a cover plate closing an upper opening of said frame portion, and a cylindrical wall of said housing, said power switching elements and said smoothing capacitor are placed on a mounting surface formed on the outer cylindrical surface of said housing and surrounded by said frame portion, said wiring section comprises a bus-bar assembly and a printed circuit board, said bus-bar assembly includes numerous bus bars integrally molded into a resin molding plate portion so as to assure mutual electrical insulation, and said bus-bar assembly is fixed to the outer cylindrical surface of said housing or to said frame portion via said resin molding plate portion and disposed at a radial outer side of said power switching elements so as to extend in a tangential direction of said motor-drive compressor, and said printed circuit board is interposed between said bus-bar assembly and said cover plate so as to extend in parallel with said bus-bar assembly for mounting said control circuit.
Specification