The self regulating system for controlling the axle RPM of an electric vehicle is based on the maximum tractive force which can be applied between wheel and rail before skidding or sliding occurs. A graphical relationship between frictional coefficient (fx) and slip i.e. wheel to rail velocity difference (Vdiff) is defined and the applied accelerating or braking torque is continuously controlled and directed towards a maximum value (X) marking the boundary of the stable region of the curve. Electronic signal processing and comparison of ideal/actual differences results in a continuous regulation of optimal torque. ADVANTAGE - Does not require direct measurement of vehicle speed w.r.t. ground and is therefore applicable to modern vehicles where all poles are driven and subject to slip, minimises wear i.e. flats on wheels or hollows in rails producing vibration and noise. Uses available power efficiently and compensates for inclines and curves.
申请公布号
DE3929497(C2)
申请公布日期
1991.11.28
申请号
DE19893929497
申请日期
1989.09.01
申请人
AEG WESTINGHOUSE TRANSPORT-SYSTEME GMBH, 1000 BERLIN, DE
发明人
SCHWARTZ, HANS-JUERGEN, DIPL.-ING., 6100 DARMSTADT, DE
