Control system for maintaining traction of rolling stock

Details Control system for maintaining traction of rolling stock Control system for maintaining traction of rolling stock

1986-01-21

1987-10-20

Shoop, Jr., William M.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Slipping and/or racing control for electric motors

180197, 361238, 364426, B61C 1508

Patent

active

047016825

ABSTRACT:
From the peripheral velocity v.sub.M of a driving wheel and vehicle velocity v, the changing rate .DELTA.v.sub.s /.DELTA.t of the relative velocity v.sub.s therebetween with respect to time is obtained. The changing rate .DELTA.f/.DELTA.t of the traction force f produced in the driving wheel at that time is obtained from a detected armature current of a motor driving the driving wheel. A driving torque produced by the motor is so controlled as to be decreased when polarities of the changing rate in the relative velocity and that in the traction force are different from each other.

REFERENCES:
patent: 3780346 (1973-12-01), Gagnon
patent: 4035698 (1977-07-01), Soderberg
patent: 4070562 (1978-01-01), Kuno et al.
patent: 4075538 (1978-02-01), Plunkett
patent: 4095147 (1978-06-01), Mountz
patent: 4344139 (1982-08-01), Miller et al.
patent: 4347569 (1982-08-01), Allen, Jr. et al.
patent: 4583611 (1986-04-01), Frank et al.

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