Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Running-speed control
Patent
1980-08-18
1984-09-18
Dobeck, B.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Running-speed control
318139, 318447, H03K 300
Patent
active
044726635
ABSTRACT:
An electrically operated dual motor drive system having first and second reversible traction motors (14, 16) driven by a power source (18). Motor control circuitry (10, 12) for controlling the direction of current flow through the motors (14, 16) is designed to be actuated by only two coils (36, 42). Preferably, control circuits (10, 12) employ an arrangement of normally open (32a, 32b, 38a, 38b) and normally closed (34a, 34b, 40a, 40b) contacts such that the two motors (14, 16) operate in reverse directions in the event of a complete system malfunction. A line contactor (20) is advantageously utilized to simultaneously serve as a main power disconnect for a variety of motors within the system.
REFERENCES:
patent: 3936709 (1976-02-01), Wright
patent: 3950681 (1976-04-01), Kern
patent: 3965402 (1976-06-01), Mogle
patent: 4028597 (1977-06-01), Delaney et al.
patent: 4054817 (1977-10-01), Gurwicz et al.
patent: 4081725 (1978-03-01), Schmidt et al.
patent: 4296361 (1981-10-01), Archer
Dobeck B.
Towmotor Corporation
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