[특허]Synchronous wheel slip strategy for a locomotive governor

[미국특허] Synchronous wheel slip strategy for a locomotive governor 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B61C-015/08
출원번호	US-0337514 (1989-04-13)
발명자 / 주소	Evans Raymond G. (Washington IL) Earleson Walter E. (Peoria IL) Richardson Jr. Joseph W. (East Peoria IL)
출원인 / 주소	Caterpillar Inc. (Peoria IL 02)
인용정보	피인용 횟수 : 10 인용 특허 : 13

초록 ▼

Synchronous wheel slip control is desirable in a locomotive having wheels driven by at least one traction motor which receives power from an engine driven generator. Wheel slip control in known systems involves increased cost and complexity resulting from sensors required to determine an actual locomotive speed. In the subject invention a microprocessor under software control is used to detect and control synchronous wheel slip. Generator current and voltage are measured and used in an empirical relationship to calculate an actual locomotive speed. A first-order-lag of the actual locomotive speed is calculated and compared to the calculated locomotive speed. If the compared values differ by more than a preselected reference a synchronous slip condition exists and the generator power is reduced by a preselected magnitude. The generator power is incrementally reduced until the synchronous slip condition is no longer detected. The cost of controlling wheel slip is reduced since no sensors are required for detecting actual locomotive speed.

대표청구항 ▼

An apparatus for controlling synchronous wheel slip of a locomotive having at least one electric traction motor powered by an engine-generator unit of the type having a field current controller, comprising: a current sensing means for detecting a current produced by said engine-generator unit and producing a current signal responsive to said detected current; a voltage sensing means for detecting a voltage produced by said engine-generator unit and producing a voltage signal responsive to said detected voltage; and, a processor means for receiving said produced current and voltage signals, processing said produced current and voltage signals to produce a calculated wheel speed signal indicative of the actual locomotive wheel speed, processing said calculated wheel speed signal to produce a lagged wheel speed signal, deriving a difference signal in response to a difference between said calculated and lagged wheel speed signals, and delivering a control signal to said field current controller in response to said difference signal being greater than a first preselected reference signal in order to reduce wheel slip.

이 특허에 인용된 특허 (13) 인용/피인용 타임라인 분석

Giessner ; Jean, Apparatus for measuring the slip of locomotive wheels and preventing sliding thereof.
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Woods David H. (Mississauga CAX), Combined regenerative and friction braking system for a vehicle.
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Hirotsu Tetsuji (Katsuta JPX) Nakamura Kiyoshi (Katsuta JPX) Kasai Syoji (Katsuta JPX) Yamaguchi Hiroshi (Katsuta JPX) Kozu Eiji (Katsuta JPX), Control apparatus for maintaining traction in electric rolling stock.
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Earleson Walter E. (Peoria IL) King Dennis M. (Peoria IL) Moncelle Michael E. (Normal IL), Locomotive governor control.
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de Buhr Alfred P. (Downers Grove IL) Meyer Bruce R. (Western Springs IL), Locomotive wheel slip control.
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Soderberg Bo (Vasteras SW), Means for counteracting slipping and skidding in a motor-driven rail-vehicle.
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Hahn Karl (Berlin DEX) Bohms Herbert (Berlin DEX) Strecker Johannes (Feldafing DEX) Landes Wilhelm (Neusass-Westheim DEX), Method and apparatus for braking rail-guided vehicles automatically and accurately with respect to a deceleration distan.
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Logston ; Jr. Charles F. (Naperville IL) Meyer Bruce R. (Western Spring IL) DE Buhr Alfred P. (Downers Grove IL) Liebenthal Benjamin C. (La Grange IL), Method of controlling locomotive wheel slip.
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Riondel Pierre (Geneva CHX), Slip-limiting control for rail vehicles.
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Almquist Hans (Vesteras SEX) Nilsson Lars-Olof (Vesteras SEX) Skoog Hans (Vesteras SEX), Torque limiting drive with slip monitor.
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Roberts Richard D. (South Park Township ; Allegheny County PA) Hoffman Lester J. (Churchill Borough PA), Vehicle propulsion control apparatus and method.
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Young John A. I. (Peterborough CAX), Wheel slip control using differential signal.
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Allen ; Jr. John J. (Watertown NY) Shute Bruce W. (Henderson Harbor NY), Wheel slip system.
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이 특허를 인용한 특허 (10) 인용/피인용 타임라인 분석

Hawkins, William Charles; McManus, Sean James, Adhesion control system for off-highway vehicle.
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Santoro ; Jr. Ralph ; Kettle ; Jr. Paul J. ; Ferri Vincent ; Miller Craig A., Apparatus for determining the absolute position of throttle dynamic brake and reverser handles on a locomotive control s.
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Evans,Raymond G., Fuel control system for an engine.
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Earleson Walter E. (Peoria IL) Evans Raymond G. (Washington IL) Mirhakimi Siamak (Peoria IL), Locomotive dynamic brake control.
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Kumar, Ajith Kuttannair, Locomotive wheel speed control.
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Neher, Charles E., Power generation and distribution system configured to provide power to a motor.
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Wright, Jeffrey Holt; Fonseca, Roy Christopher; Black, Andrew William, Power system with multiple generator units.
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Okubo, Shunsuke; Butcher, Jonathan Andrew; Kozarekar, Shailesh Shrikant, System and method for hybrid vehicle control during wheel slip events to limit generator speed.
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Okubo, Shunsuke; Butcher, Jonathan Andrew; Kozarekar, Shailesh Shrikant, System and method for hybrid vehicle control during wheel slip events to limit generator speed.
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Johnson Chipley H., Traction control system and a method for remedying wheel-slippage.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Synchronous wheel slip strategy for a locomotive governor 원문보기