EP0310426A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Turbocharger with rotary electric machine
Assignee: Isuzu Motors Ltd
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Filing: 1988-09-30
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Granted: —
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Expires: 2008-09-30
Abstract
Abstract A turbocharger with a rotary electric machine has a permanent magnet, or a nonmagnetized magnetic member, or surfaces of different light reflectivities on a rotatable member of the turbocharger, as a detectable means disposed in a position corresponding to the angular position of magnetic poles of the permanent magnet of a magnet rotor of the rotary electric machine. A detecting means is disposed in a position coacting with the detectable means for detecting the angular position of magnetic poles of the magnet rotor. A shield means is provided for preventing the detectable means from being adversely affected by the magnetic field from the magnet rotor, oil, and dust, so that a detected signal of a high S/N ratio can be produced for accurately detecting the angular position of the magnetic poles of the magnet rotor as it rotates.
Inventors
- 👤 Shinji Isuzu Fujisawa Dai Hara
- 👤 Yoshihisa Isuzu Totsuka Koizumi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 10:11
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/04; F02B37/10; F01; F01D; F01D15/00; F01D15/10; H; H02; H02K; H02K11/00; H02K11/01; H02K11/014; H02K11/0141; H02K29/00; H02K29/06; H02K29/10; H02K29/12; H02K7/00; H02K7/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
148 words
A turbocharger with a rotary electric machine, including a turbine impeller drivable by the energy of exhaust gases emitted from an internal combustion engine, a rotatable shaft having one end coupled to the turbine impeller, a compressor impeller mounted on the other end of the rotatable shaft, a magnet rotor mounted on the rotatable shaft and having a permanent magnet, and a stator core disposed around the magnet core, said turbocharger comprising: detectable means mounted on a rotatable member of the turbocharger and disposed in a position corresponding to the angular position of a magnetic pole of said magnet rotor; detecting means disposed in a position coacting with said detectable means for detecting the angular position of said detectable means upon rotation thereof; and shield means for protecting detecting operation of said detecting means to shield the detecting means from influences coming from other than said detectable means.
Claim 2
Dependent Claim
148 words
A turbocharger with a rotary electric machine, including a turbine impeller drivable by the energy of exhaust gases emitted from an internal combustion engine, a rotatable shaft having one end coupled to the turbine impeller, a compressor impeller mounted on the other end of the rotatable shaft, a magnet rotor mounted on the rotatable shaft and having a permanent magnet, and a stator core disposed around the magnet core, said turbocharger comprising: detectable means mounted on a rotatable member of the turbocharger and disposed in a position corresponding to the angular position of a magnetic pole of said magnet rotor; detecting means disposed in a position coacting with said detectable means for detecting the angular position of said detectable means upon rotation thereof; and shield means for protecting detecting operation of said detecting means to shield the detecting means from influences coming from other than said detectable means.
Claim 3
Dependent Claim
28 words
A turbocharger with a rotary electric machine according to claim 1, wherein said detectable means comprises a detecting permanent magnet, and said detecting means comprises a magnetic sensor.
Claim 4
Dependent Claim
29 words
A turbocharger with a rotary electric machine according to claim 2, wherein said detecting permanent mag net is embedded in the back of a blade of said compressor impeller.
Claim 5
Dependent Claim
41 words
A turbocharger with a rotary electric machine according to claim 2, wherein said detecting permanent magnet comprises a tubular permanent magnet disposed between said compressor impeller and a fastening nut by which said compressor impeller is attached to said rotatable shaft.
Claim 6
Dependent Claim
27 words
A turbocharger with a rotary electric machine according to claim 1, wherein said detectable means a nonmagnetized magnetic member, and said detecting means comprises a magnetic sensor.
Claim 7
Dependent Claim
22 words
A turbocharger with a rotary electric machine according to claim 5, wherein said nonmagnetized magnetic member is made of amorphous silicon steel.
Claim 8
Dependent Claim
34 words
A turbocharger with a rotary electric machine according to claim 6, wherein said nonmagnetized magnetic member of amorphous silicon steel is deposited by evaporation on the back of a blade of said compressor impeller.
Claim 9
Dependent Claim
53 words
A turbocharger with a rotary electric machine according to claim 5, wherein said nonmagnetized magnetic member comprises a ring-shaped detectable member disposed between said compressor impeller and a fastening nut by which said compressor impeller is attached to said rotatable shaft, said ring-shaped detectable member having a projection on an outer periphery thereof.
Claim 10
Dependent Claim
42 words
A turbocharger with a rotary electric machine according to claim 5, wherein said nonmagnetized magnetic member comprises a fastening nut by which said compressor impeller is attached to said rotatable shaft, said fastening nut having a projection on an outer periphery thereof.
Claim 11
Dependent Claim
34 words
A turbocharger with a rotary electric machine according to claim 1, wherein said detectable means comprises surfaces of said rotatable member which have different light reflectivities, and said detecting means comprises an optical fiber.
Claim 12
Dependent Claim
42 words
A turbocharger with a rotary electric machine according to claim 10, wherein said surfaces of different light reflectivities comprises white and black paint coatings, respectively, on the outer periphery of a tubular spacer disposed between said magnet rotor and said compressor impeller.
Claim 13
Dependent Claim
46 words
A turbocharger with a rotary electric machine according to claim 10, wherein said surfaces of different light reflectivities comprise a plated reflective surface and an etched nonreflective surface, respectively, on the outer periphery of a tubular spacer disposed between said magnet rotor and said compressor impeller.
Claim 14
Dependent Claim
27 words
A turbocharger with a rotary electric machine according to claim 10, wherein said surfaces of different light reflectivities are disposed on a side of said magnet rotor.
Claim 15
Dependent Claim
34 words
A turbocharger with a rotary electric machine according to claim 1, wherein said shield means comprises an annular member comprising a magnetic thin steel plate disposed between said magnet rotor and said detecting means.
Claim 16
Dependent Claim
46 words
A turbocharger with a rotary electric machine according to claim 1, wherein said shield means comprises a partition disposed between a combination of said magnet rotor and said detecting means, and said turbine impeller, and a seal member disposed between said partition and said rotatable shaft.
References Cited (Backward Citations)
No citation records indexed.
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