Railway rolling stock – Locomotives – Electric
Patent
1977-04-14
1979-10-02
Makay, Albert J.
Railway rolling stock
Locomotives
Electric
105 615, 105 962, 116 37, B61C 300, B61C 934, B61C 942, B61C 1500
Patent
active
041694147
ABSTRACT:
A drive for high-speed locomotives has a variable-speed electric motor which transmits torque to the input shaft of a hydrodynamic power transmission having a hydrodynamic torque converter and a hydrodynamic coupling for transmission of torque to the output shaft which drives the wheels through the medium of a mechanical transmission and cardan shafts. The control unit of the drive engages the converter in the lowest speed range, the coupling in the highest speed range, and the coupling or the converter in the intermediate speed range. In the intermediate speed range, the coupling is engaged when the control unit ascertains that the ratio of maximum traction effort of the drive in engaged condition of the coupling at the momentary intermediate speed to the resistance which the locomotive encounters exceeds one. The resistance is ascertained automatically by determining the tractive effort of the drive in engaged condition of the converter at the momentary intermediate speed and by subtracting therefrom the accelerating force which is the product of the mass of locomotive plus cars (if any) and the momentary acceleration of the vehicle. The output shaft receives braking torque from a hydrodynamic brake whose controls include safety features to insure the application of brake in the event of failure of the primary actuating device.
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patent: 3989127 (1976-11-01), Staudenmaier et al.
ZEV-Glas. Ann. 98 (1974) Nr. 7/8, Jul./Aug.; pp. 232-251 inc.
ZEV-Glas. Ann. 98 (1974) Nr. 11, Nov.; pp. 363-367 inc.
Die Bundesbahn 11/1975; pp. 687-692 inc.
Railway Gazette International, Oct. 1975; pp. 397 and 399.
ETR (24)-1975; pp. 251-259 inc. Korber, Joachim; Die Elektrischelokomotive mit Kommutaturlosen Fahrmotoren.
Der Eisenbahningenieur, 26 ( 1975) 12; Herman Wolters; Tendenzen der Enturicklung Elektrischer Triebfahrzeuge.
Analog Devices; Analog Dialogue, vol. 9, No. 2, 1975, p. 16 and advertisement.
Multifunction Converter; Burr-Brown Research Corp; Jun. 1973, Model No. 4301, 3 pages.
Very Low Drift-Precision Operational Amplifier; Model No. 3510, pp. 1 and 5 (1977), Burr, Brown Research Corp.
Beltran Howard
Kontler Peter K.
Makay Albert J.
Voith Getreibe KG
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