Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1996-08-14
1998-12-08
Masih, Karen
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
318798815-, 318 52, 318 61, 36442407, H02P 534
Patent
active
058475346
ABSTRACT:
The control system is constructed so that an inverter output frequency command is increased/decreased based on a frequency-to-time rate-of-change command, and the frequency-to-time rate-of-change command is controlled with a current control system. Further, it is also constructed so that the frequency-to-time rate-of-change command is adjusted and the current command is changed with a readhesion control system. The control system is capable of accelerating and decelerating the vehicle with a torque corresponding to an inverter output current command which is generated basically without using any rotational frequency of induction motor, and further capable of accelerating and decelerating the vehicle with a torque corresponding to a value near the limit adhesion between the wheel and the rail under a condition of occurrence of slip/skid.
REFERENCES:
patent: 4335337 (1982-06-01), Okamatsu et al.
patent: 5481460 (1996-01-01), Masaki et al.
patent: 5583406 (1996-12-01), Mutoh et al.
"Slip/Skid Control in an Inverter Controlled Vehicle", Proceedings of the Na'l Meeting of Industry and Application Society, Institute of electrical Engineers of Japan, Aug. 1990, front page, pp. 25-30.
"A Novel High Adhesion Control Method in a VVVF Inverter Control", Science of Electric Car, Feb. 1992, vol. 45, No. 2, front page, pp. 13-17.
Nakamura Kiyoshi
Tanamachi Tokunosuke
Hitachi , Ltd.
Masih Karen
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