Slip-limiting control for rail vehicles

Details Slip-limiting control for rail vehicles Slip-limiting control for rail vehicles

1984-09-14

1986-05-13

Shoop, Jr., William M.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Slipping and/or racing control for electric motors

180197, 303 99, 303107, B61C 1508, B60T 800

Patent

active

045889325

ABSTRACT:
A method and device for slip-limiting control on a rail vehicle wherein for controlling or limiting slip, it is necessary to determine the actual speed of the rail vehicle. The invention overcomes the problems in traction vehicles such as, for example, locomotives which only have driving wheels and no running wheels, especially if all driving wheels slip simultaneously. For the accurate determination of the vehicle speed, the traction motor current for the associated motor is reduced for a short period, of about 3 s, at the driving wheel which is rearmost in the direction of motion, by means of a slip-reduction signal which is supplied to a slip-limiting controller which also reduces the speed of this driving wheel so that this wheel no longer slips and its peripheral wheel speed is equal to the vehicle speed. During a presettable long-term period of about 25 s, all slip-limiting controllers of the rail vehicle are preset with a speed reference signal (v.sub.ref) having a slight rise in speed so that the peripheral wheel speed of the driving wheel is somewhat greater than the vehicle speed but not great enough for the wheels to spin. A jolt detector is provided for intializing this measure.

REFERENCES:
patent: 4032197 (1977-06-01), Kohler
patent: 4075538 (1978-02-01), Plunkett
patent: 4164872 (1979-08-01), Weigl
patent: 4358164 (1982-11-01), Bleckmann et al.
patent: 4435768 (1984-03-01), Arikawa

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