Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1994-10-20
1996-04-23
Strecker, Gerard R.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
188181R, 310168, 32420725, G01P 3488, B60T 832
Patent
active
055107087
ABSTRACT:
A variable reluctance rotation sensor comprising a flux member having a ferromagnetic pole piece formed of a cylindrical center portion interposed between a first and second end portion. Each of the end portions have a respective surface which contains elongated teeth, similarly separated by slots as teeth on the periphery of a toothed wheel. The cylindrical center portion is positioned with respect to the toothed wheel such that the toothed surfaces of the first and second end portions are positioned adjacent the periphery of the toothed wheel comprising the teeth and slots, the magnetic flux member and toothed wheel defining an air gap. The sensor further comprises permanent magnets which establish main flux loops traversing the air gap, and leakage flux loops linking an electrical coil wound about the cylindrical center portion. As the toothed wheel is rotated, the magnitude of the main flux loops vary in relation to the varying air gap. The leakage flux loops, in turn, vary in relation to the varying main flux loops, the varying leakage flux loops being linked to the electrical coil and resulting in a sinusoidal output voltage signal proportional to the varying leakage flux loops. Each cycle of the output signal corresponds to a predetermined incremental angular rotation of the toothed wheel.
REFERENCES:
patent: 3619678 (1971-11-01), Ruof
patent: 3947711 (1976-03-01), Presley et al.
patent: 4461994 (1984-07-01), MacDonald
patent: 4636674 (1987-01-01), Peterson
patent: 4700133 (1987-10-01), Day
patent: 4969753 (1990-11-01), Kato et al.
patent: 5003259 (1991-03-01), Palazzetti et al.
patent: 5019774 (1991-05-01), Rosenberg
patent: 5023546 (1991-06-01), Pawlak et al.
patent: 5023547 (1991-06-01), Pawlak et al.
patent: 5183341 (1993-02-01), Ouchi et al.
patent: 5287738 (1994-02-01), Polinski et al.
Green Alan H.
Pawlak Andrzej M.
Shirai Takeshi
General Motors Corporation
Gorbatoff Timothy G.
Strecker Gerard R.
LandOfFree
Variable reluctance rotation sensor with leakage magnetic flux s does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable reluctance rotation sensor with leakage magnetic flux s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable reluctance rotation sensor with leakage magnetic flux s will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2311512