Speed limiting circuit for universal type series or compound ele

Details Speed limiting circuit for universal type series or compound ele Speed limiting circuit for universal type series or compound ele

1991-08-14

1993-10-19

Shoop, Jr., William M.

Electricity: motive power systems

Series motors

Field circuit control

318250, 388905, 361 33, 361 54, H02K 2300

Patent

active

052549135

ABSTRACT:
A device for limiting the maximum and/or minimum speed of universal series- or compound-type electric motors. The device includes a first impedance element for limiting the maximum speed of the motor under light load (high speed) conditions to a predetermined value, and a second impedance element for limiting the minimum speed of the motor under high load (low speed) conditions. The limited maximum and minimum speeds of the motor give it operating characteristics which are similar to a shunt motor. Various impedance elements are provided to accommodate

REFERENCES:
patent: 3187246 (1965-06-01), Garten
patent: 3221234 (1965-11-01), Ault
patent: 3590352 (1971-06-01), Ries
patent: 4086983 (1978-05-01), Anzai et al.
patent: 4131832 (1978-12-01), Cavil et al.
patent: 4213077 (1980-07-01), Hornung et al.
patent: 5015928 (1991-05-01), Yang

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