The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 1990
Filed:
Sep. 30, 1988
Shinji Hara, Fujisawa, JP;
Yoshihisa Koizumi, Yokohama, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
A turbocharger with a rotary electric machine has a permanent magnet, nonmagnetized metallic member, or surfaces of different light reflectivities fixed upon a rotatable member of the turbocharger, as a detectable means. The detectable means is disposed in a position corresponding to the angular position of magnetic poles of the permanent 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 permanent magnet rotor. A shield means is provided for preventing the detectable means from being adversely affected by magnetic fields, oil, and dust, so that a detected signal of a high S/N raio can be produced for accurately detecting the angular position of the magnetic poles of the permanent magnet rotor as it rotates.