Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1989-09-01
1992-04-21
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310179, 310186, 310193, 310 67R, 310 68B, 318138, H02P 506, H02K 2112, H02K 1100, H02K 110
Patent
active
051071592
ABSTRACT:
A two phase unipolar brushless direct current motor with asymmetrically arranged pole positions including a rotor portion (12) mounted upon a shaft subassembly (14) and rotating therewith with respect to a stator portion (16). The rotor portion (12) includes a field magnet (22) which is divided into alternately polarized zones (26) and (28) which are of dissimilar sizes, and a commutator magnet (38) to provide for electrical timing. The stator portion (16) includes salient pole positions (44) which are asymmetrically arranged around the circumference of the stator core.
A latching hall effect sensor (82) is also provided to act as a commutator triggering element. The motor (10) is characterized in that the asymmetrical arrangement of its magnetic elements prevents there being a zero torque or a detent position. The primary usage of the motor (10) is in digital data storage devices.
REFERENCES:
patent: 3978356 (1976-08-01), Spiesberger
patent: 4031419 (1977-06-01), Spiesberger et al.
patent: 4096419 (1978-06-01), Wren et al.
patent: 4458184 (1984-07-01), Kawate
patent: 4554491 (1985-11-01), Plunkett
patent: 4672253 (1980-06-01), Tajima
patent: 4700098 (1987-10-01), Kawashima
patent: 4719378 (1988-01-01), Katsuma et al.
patent: 4739203 (1988-04-01), Miyao et al.
patent: 4769567 (1988-09-01), Kurauchi et al.
patent: 4847526 (1989-07-01), Takehara et al.
Applied Motion Products, Inc.
Hughes Michael J.
La Balle C.
Stephan Steven L.
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