Electric motors control system

Details Electric motors control system Electric motors control system

1977-11-14

1979-11-13

Dobeck, Benjamin

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Plural, diverse motor controls

318 65, H02P 100

Patent

active

041744942

ABSTRACT:
This system for controlling the operation of several electric motors notably for blinds and similar devices comprises a plurality of decentralized control devices each associated with one motor and controlled from a central control means via a common control line. Each decentralized control device comprises, for each direction of rotation of the motor concerned, a relay and, for each motor, control means connected in parallel to the common control line. The control means for each relay comprise a switch connecting the common line to the middle point of the pair of inverters controlling the two directions of rotation of the motor. The front contact of each inverter controls the energization of the corresponding relay and the back contact of each inverter controls the self-energization of the relay of the other inverter via a self-energization contact provided on the other relay.

REFERENCES:
patent: 1919525 (1933-07-01), Nogosek
patent: 2399699 (1946-05-01), Wahlberg
patent: 2424243 (1947-07-01), Lowell

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