Controlled rotor motor

Details Controlled rotor motor Controlled rotor motor

1977-04-11

1978-09-19

Schaefer, Robert K.

Electricity: motive power systems

Motor-reversing

Field circuit control

318360, H02K 1700

Patent

active

RE0297755

ABSTRACT:
An electric motor for driving a mechanical load at variable speed and constant torque includes a stationary housing containing a magnetic field rotor driven by alternating current and surrounding a drive rotor. The rotors rotate in opposite direction when the drive rotor is coupled to a load. The motor can be of induction or synchronous type. The means for adjustably varying retardation of the field rotor and consequently the speed of the drive rotor [may be by] is a direct current energized magnetic coercive force clutch mechanically coupled to the field rotor [or by other electromechanical means connected in circuit with the field rotor] to provide constant output torque throughout the speed range of the drive rotor.

REFERENCES:
patent: 489709 (1893-01-01), Hering
patent: 1828943 (1931-10-01), Rossman
patent: 2022502 (1935-11-01), Cutler
patent: 2061983 (1936-11-01), Rossman
patent: 2246372 (1941-06-01), Lockwood et al.
patent: 2779548 (1957-01-01), Helmer
patent: 3593085 (1971-07-01), Decker

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