Electricity: motive power systems – With particular motor-driven load device – Tension-maintaining type of motor-control system
Patent
1982-05-13
1984-05-15
Rubinson, G. Z.
Electricity: motive power systems
With particular motor-driven load device
Tension-maintaining type of motor-control system
318 7, 318 60, 318 87, H02P 550
Patent
active
044490771
ABSTRACT:
When a plurality of shunt motors connected in parallel are used for driving an electric railcar, the differences in the characteristics of the motors introduced during the manufacturing thereof causes the armature currents to vary greatly even when they are running at the same speed. To control the field current by means a single device, therefore, the armature currents must be corrected by armature choppers. In order to fully recover the kinetic energy possessed by the electric railcar, the present invention automatically corrects for the difference in the characteristics of the shunt motors so that the required braking force is uniformly borne by each of the shunt motors.
REFERENCES:
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"Marta Propulsion System", UITP Meeting, Choppers, Sep. 1978, pp. 9 and 11.
"La Nouvelle Locomotive CC Serie 20,3 KV a Hacheur de Tension, de la Societe Nationale des Chemins de Fer Belges: SNCB", Revue de I'Assoc. Fransaise de Amis des CHEMIN DE FER 1975-6, No. 315, pp. 246-250.
Evans Arthur G.
Mitsubishi Denki & Kabushiki Kaisha
Rubinson G. Z.
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