EP0189165A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A control system for maintaining the traction of a rolling stock vehicle
Assignee: Hitachi Ltd
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Filing: 1986-01-20
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Granted: —
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Expires: 2006-01-20
Abstract
Abstract From a peripheral velocity v M of a driving wheel and a vehicle velocity v, the changing rate Δ v s / Δ t of the relative velocity v s therebetween with respect to time is obtained. The changing rate Δ f/ Δ 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 decrease when polarities of the changing rate in the relative velocity and that in the traction force are different from each other.
Inventors
- 👤 Tetsuji Hirotsu
- 👤 Hisakatsu Kiwaki
- 👤 Kiyoshi Nakamura
- 👤 Hiroshi Narita
- 👤 Syozi Kasai
- 👤 Akira Kimura
- 👤 Yoshio Tsutsui
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 10:49
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/1701; B60T8/1705; B60L; B60L3/00; B60L3/10; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/72
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
206 words
A control method of a control apparatus for rolling stock with electric driving motors (14) having a first means for controlling a force (f) acting between a wheel and a rail in accordance with an instruction, a second means for detecting a relative velocity (v ) of a peripheral velocity of the wheel to a vehicle velocity against the ground, a third means for discriminating the unallowable nonadhesive state of running of the wheel when the relative velocity (V s ) exceeds a certain value to generate a compensating signal for decreasing the instruction given to the first means so that the force acting between the wheel and the rail is decreased, characterised in that the signal for compensating the instruction is obtained by the following steps: calculating the changing rate (Δv s /Δt) of the relative velocity (v ) with respect to time (t), calculating the changing rate (Δf/Δt) of the force (f) acting between the wheel and the rail with respect to time (t), and generating the compensating signal for decreasing the instruction when the polarity of the changing rate (Δv s /Δt) of the relative velocity is different from the changing rate (Af/At) of the force acting between the wheel and the rail.
Claim 2
Dependent Claim
206 words
A control method of a control apparatus for rolling stock with electric driving motors (14) having a first means for controlling a force (f) acting between a wheel and a rail in accordance with an instruction, a second means for detecting a relative velocity (v ) of a peripheral velocity of the wheel to a vehicle velocity against the ground, a third means for discriminating the unallowable nonadhesive state of running of the wheel when the relative velocity (V s ) exceeds a certain value to generate a compensating signal for decreasing the instruction given to the first means so that the force acting between the wheel and the rail is decreased, characterised in that the signal for compensating the instruction is obtained by the following steps: calculating the changing rate (Δv s /Δt) of the relative velocity (v ) with respect to time (t), calculating the changing rate (Δf/Δt) of the force (f) acting between the wheel and the rail with respect to time (t), and generating the compensating signal for decreasing the instruction when the polarity of the changing rate (Δv s /Δt) of the relative velocity is different from the changing rate (Af/At) of the force acting between the wheel and the rail.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein the compensating signal for decreasing the instruction is generated only when the changing rate (Avs/At) of the relative velocity is positive.
Claim 4
Dependent Claim
42 words
The method of claim 1 or 2, wherein the compensating signal is passed through a delay element (32) which has a small time constant for increasing of its input signal and a relatively large time constant for decreasing of its input signal.
Claim 5
Dependent Claim
47 words
The method of claim 1 or 2, wherein the compensating signal is generated to increase the instruction, when the changing rate (Δv s /Δt) of the relative velocity is negative and the changing rate (Af/At) of the force acting between the wheel and the rail is positive.
References Cited (Backward Citations)
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