초록 ▼

An improved supercharging apparatus combines the elements of a rotary electric machine and an air compressor, such as in a turbocharger. A plurality of permanent magnets are encapsulated by a multi-layer carbon filament winding wound around the plurality of permanent magnets for retention of the plu

An improved supercharging apparatus combines the elements of a rotary electric machine and an air compressor, such as in a turbocharger. A plurality of permanent magnets are encapsulated by a multi-layer carbon filament winding wound around the plurality of permanent magnets for retention of the plurality of magnets as the rotor of an electric motor for driving a charge air compressor for an internal combustion engine. The plurality of permanent magnets are preferably located on an inner core and on a magnet mounting surface formed on the rear face of the compressor wheel of the charge air compressor and spaced intermediately of the shaft portion and periphery of the compressor wheel before encapsulation by winding a carbon filament in a multi-layer coil over the plurality of magnets and the magnet mounting surface of the compressor wheel. Such construction provides, particularly in turbocharger applications, retention of the plurality of magnets against the very high centrifugal forces imposed on the magnets by very high rotational speeds, elimination of the efficiency-robbing eddy currents generated in metallic retainers, an economic production of compressor wheels and magnet motor rotor assemblies for superchargers, and protection of the permanent magnets from high temperatures and high temperature gradients.

대표청구항 ▼

[ We claim:] [1.] A turbocharging device for use with an internal combustion engine, comprising:a turbocharger housing;a shaft rotatably supported by said housing and carrying a charge air compressor wheel and an exhaust gas turbine wheel;an exhaust gas intake adjacent said exhaust gas turbine wheel

[ We claim:] [1.] A turbocharging device for use with an internal combustion engine, comprising:a turbocharger housing;a shaft rotatably supported by said housing and carrying a charge air compressor wheel and an exhaust gas turbine wheel;an exhaust gas intake adjacent said exhaust gas turbine wheel to direct exhaust gas flow to said turbine wheel;a combustion air intake adjacent to said combustion air compressor wheel to direct ambient air to said compressor wheel;a plurality of permanent magnets located on the compressor wheel and retained for rotation with the compressor wheel by a multi-layer carbon fiber winding over said plurality of permanent magnets; anda plurality of stator windings carried by said turbocharger housing adjacent to the compressor wheel,wherein the plurality of permanent magnets are retained on an inner core with an affixed end piece by said multi-layer, carbon fiber winding, and said inner core is press fitted on an axially extending projection formed on the rear of the compressor wheel.