Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1980-06-18
1982-10-19
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Rotary
310168, H02K 2138
Patent
active
043552510
ABSTRACT:
Several embodiments of tachometers generators for use in controlling the speed of electrical motor driven tools. In each embodiment a toothed rotor (28, 52, 72, 92, 122) is fixed for rotation with the motor armature shaft (23, 53, 73, 93, 124) and a sensor (31, 55, 75, 96, 126) is juxtaposed to the rotor. The sensor is comprised of a core (32, 56, 76, 98, 127) having a first end portion (33, 57, 77, 99, 128) juxtaposed at a first location relative to the rotor and a second end portion (36, 58, 78, 101, 129) that is juxtaposed to the rotor at a second, spaced location. A permanent magnet (37, 59, 79, 102, 131) is interposed between the second end portion and the rotor with one of its poles aligned with a second end portion and the other of its poles aligned with the rotor. A coil (38, 61, 81, 103, 132) is wound around an intermediate portion (34, 62, 82, adjacent 99, adjacent 128) of the core so that a voltage will be generated in the coil by the alternating magnetic flux passing through the core during rotation of the rotor, which voltage is indicative of the speed of the armature shaft. The compact construction facilitates installation in close places and the device provides a strong signal and exhibits a high signal to noise ratio.
REFERENCES:
patent: 2462761 (1949-02-01), Momberg
patent: 3495112 (1970-02-01), Kurakin
patent: 3619678 (1971-11-01), Ruof
patent: 3735262 (1973-05-01), Orth
patent: 3947711 (1976-03-01), Presley et al.
patent: 3967200 (1976-06-01), Tetsugu et al.
patent: 3970935 (1976-07-01), Beery et al.
Alessio Lorenzo E.
Cuneo Giuseppe
Black & Decker Inc.
Duggan Donovan F.
Murphy Edward D.
Ottesen Walter
Weinstein Harold
LandOfFree
Tachometric generator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tachometric generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tachometric generator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1340009