Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Slipping and/or racing control for electric motors
Patent
1975-01-14
1977-07-19
Dobeck, B.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Slipping and/or racing control for electric motors
318433, H02P 552
Patent
active
040371433
ABSTRACT:
A motor-driven rail-vehicle with a drive system including an electric motor and drive wheels is provided with an oscillation sensing member which senses oscillations within a pre-determined frequency range of an electrical quantity of the drive system, such as the armature current or voltage, and forms a signal representing such oscillations. This signal is compared with a signal corresponding to a predetermined threshold value, and the tractive force of the motor is reduced in response to an increase of the oscillation amplitude above such threshold value.
REFERENCES:
patent: 3482887 (1969-12-01), Sheppard
patent: 3541406 (1970-11-01), Etienne
patent: 3657601 (1972-04-01), Darrow
patent: 3743900 (1973-07-01), Johansson
ASEA Aktiebolag
Dobeck B.
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