CA1123496A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Locomotive wheel slip determination
Assignee: General Electric Canada Co
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Filing: 1978-07-20
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Granted: 1982-05-11
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Expires: 1998-07-20
Abstract
Abstract Case 2558 ABSTRACT OF THE DISCLOSURE Apparatus for determining and controlling wheel slip in a locomotive driven by d.c. motors has sensors which sense the wheel speeds of the different wheels and provide signals representing the different wheel speeds to a comparator. The comparator provides a signal representing the difference between the highest and lowest wheel speeds. A converter also acts on the signals representing the different wheel speeds to provide signals representing the acceleration of the different wheels and a selector selects the signal representing the largest acceleration. The signal representing the difference between the highest and lowest wheel speeds, and the signal representing the largest rate of acceleration are added together to provide a fault signal. A signal modifier modifies the fault signal to provide a controlled decay rate and the resulting signal is used to control the d.c. motors.
Inventors
- 👤 James S. Mark
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-30 11:54
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; Y02T10/64
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
Apparatus for determining and controlling wheel slip in a traction vehicle powered by d.c. motors, comprising sensor means for sensing the speed of individual wheels driven by different motors and providing first signals representing individual wheel speeds, comparison means for receiving said first signals and deriving a second signal representing the difference between the highest and lowest sensed wheel speeds, conversion means for receiving said first signals and deriving respective third signals representing rates of acceleration of said individual wheels, selector means for receiving said third signals and providing a fourth signal representing the highest rate, summing means for receiving said second and fourth signals and providing a fifth signal representing a fault signal, and signal modifying means for receiving said fifth signal and comprising a slope generator to provide a slope governing said rate of decay of said fifth signal, said slope generator including a slope control to adjust said slope and consequently said rate of decay and a level control to adjust a fixed level at which said decay commences, said signal modifying means providing an output control signal for said motors.
Claim 2
Dependent Claim
184 words
Apparatus for determining and controlling wheel slip in a traction vehicle powered by d.c. motors, comprising sensor means for sensing the speed of individual wheels driven by different motors and providing first signals representing individual wheel speeds, comparison means for receiving said first signals and deriving a second signal representing the difference between the highest and lowest sensed wheel speeds, conversion means for receiving said first signals and deriving respective third signals representing rates of acceleration of said individual wheels, selector means for receiving said third signals and providing a fourth signal representing the highest rate, summing means for receiving said second and fourth signals and providing a fifth signal representing a fault signal, and signal modifying means for receiving said fifth signal and comprising a slope generator to provide a slope governing said rate of decay of said fifth signal, said slope generator including a slope control to adjust said slope and consequently said rate of decay and a level control to adjust a fixed level at which said decay commences, said signal modifying means providing an output control signal for said motors.
Claim 3
Dependent Claim
39 words
Apparatus as defined in claim 1 and further comprising first biasing means connected between said comparison means and said summing means to provide a bias inhibiting said second signal when said second signal is below a first predeter-mined level.
Claim 4
Dependent Claim
42 words
Apparatus as defined in claim 2 and further comprising a second biasing means connected between said selector Case 2558 means and said summing means to provide a bias inhibiting said fourth signal when said fourth signal is below a second predetermined level.
Claim 5
Dependent Claim
225 words
Apparatus for determining wheel slip in a traction vehicle powered by d.c. motors, comprising sensor means for sensing the speed of individual wheels driven by different d.c. motors and providing first signals whose voltage varies as the speed of the respective wheels, a voltage comparator for receiving said first signals and deriving a second signal representing the difference between the highest and the lowest voltage of said first signals, first summing means for receiving said second signal and summing said second signal over a short term, conversion means for receiving said first signals and deriving respective third signals whose voltage varies as the rates of acceleration of the respective wheels, selector means for receiving said third signals and providing a fourth signal representing the highest voltage of said third signals, second summing means for receiving said fourth signal and summing said fourth signal over a short term, third summing means for receiving the summed second and fourth signals and providing as an output a fifth signal which is the algebraic sum of said summed second and fourth signals, and a decay rate slope generator for receiving said fifth signal and providing as an output control signal to reduce the driving torque of said motors when said fifth signal indicates wheel slip a sixth signal corresponding to said fifth signal with a controlled rate of decay.
Claim 6
Dependent Claim
225 words
Apparatus for determining wheel slip in a traction vehicle powered by d.c. motors, comprising sensor means for sensing the speed of individual wheels driven by different d.c. motors and providing first signals whose voltage varies as the speed of the respective wheels, a voltage comparator for receiving said first signals and deriving a second signal representing the difference between the highest and the lowest voltage of said first signals, first summing means for receiving said second signal and summing said second signal over a short term, conversion means for receiving said first signals and deriving respective third signals whose voltage varies as the rates of acceleration of the respective wheels, selector means for receiving said third signals and providing a fourth signal representing the highest voltage of said third signals, second summing means for receiving said fourth signal and summing said fourth signal over a short term, third summing means for receiving the summed second and fourth signals and providing as an output a fifth signal which is the algebraic sum of said summed second and fourth signals, and a decay rate slope generator for receiving said fifth signal and providing as an output control signal to reduce the driving torque of said motors when said fifth signal indicates wheel slip a sixth signal corresponding to said fifth signal with a controlled rate of decay.
References Cited (Backward Citations)
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