Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Slipping and/or racing control for electric motors
Patent
1979-07-23
1982-06-15
Weldon, Ulysses
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Slipping and/or racing control for electric motors
318 71, B61C 1508
Patent
active
043353371
ABSTRACT:
A control system for an electric motor vehicle adapted to be driven by a group of induction motors, comprises a converter for producing an a.c. output to energize the group of induction motors, a frequency command circuit for producing a value representing a minimum number of rotations among those of at least two induction motors of the group added with a slip frequency in a power running mode of the vehicle on one hand and a value representing a maximum number of revolutions among those of at least two given induction motors of the group subtracted by the slip frequency in a regenerative braking mode, respectively, the values being utilized as frequency control commands, and a frequency control circuit for controlling the output for controlling the output frequency of the converter in dependence on the frequency control commands, thereby to improve the adhesion performance of the electric motor vehicle.
REFERENCES:
patent: 3614564 (1971-10-01), Hirotsu et al.
patent: 3930189 (1975-12-01), Smith
patent: 3982164 (1976-09-01), de Buhr et al.
patent: 4134048 (1979-01-01), Schneider
patent: 4136303 (1979-01-01), Almquist et al.
patent: 4164872 (1979-08-01), Weigl
Ibamoto Masahiko
Narita Hiroshi
Okamatsu Shigetoshi
Tsuboi Takashi
Hitachi , Ltd.
Weldon Ulysses
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