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  • 1
    Electronic Resource
    Electronic Resource
    Structure and Surfactance-Evaluation of Ricinoleyl Alcohol. (1961)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 6 (1961), S. 38-42 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je60009a012
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Structure and Surfactance. Sulfate Salts of Ricinoleo and Its Acetoxy Glycerides. (1961)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 6 (1961), S. 548-550 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je60011a020
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ternary Liquid Equilibria. (1966)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 11 (1966), S. 335-338 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je60030a013
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    On the performance characteristics of a synchronous motor fed from a voltage source inverter (1984)
    Springer
    Electrical engineering 67 (1984), S. 179-188 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Übersicht Aufgrund des Signalfußdiagramms wird das stationäre Verhalten des Spannungsgespeisten Synchronmotorantriebs bei rechteckförmiger Spannung für verschiedene Betricbsarten der Maschine untersucht. Dafür werden die Gleichungen der Maschine auf der Basis des Zweiachsenmodells aufgestellt. Die Untersuchungen zeigen, daß das Drehmoment Schwankungen hat, deren Amplitude um etwa 20 Prozent des Mittelwerts liegen. Weiter wird gezeigt, daß diese Schwankungen kleiner als die des stromgespeisten Synchronmotors sind. Je nach der Betriebsart besitzt die Maschine eine Drehmoment-Drehzahl Kennlinie, die der des Nebenschluß- oder Reihenschlußmotors ähnlich ist.
    Notes: Contents Using two axis model the steady state characteristics of a voltage controlled synchronous motor drive are investigated for different modes of operation based on signal flow graph technique. The input voltages are assumed to be quasi square wave. The analysis shows that depending upon the mode employed the machine can be made to possess shunt, series or mixed characteristic. The torque developed is of pulsating nature. All the modes of operation have sixth harmonic pulsations which are roughly 20 percent of the mean value. A voltage fed motor is found to have reduced torque pulsations when compared to a current fed one with the same flux levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01584522
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    On the steady state analysis of a current fed induction motor (1979)
    Springer
    Electrical engineering 61 (1979), S. 79-88 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Übersicht Für einen Asynchronmotor, der über einen Umrichter mit eingeprägtem Strom arbeitet, werden die Gleichungen in einem auf zwei Strangachsen bezogenen Koordinatensystem aufgestellt. Diese sind für die Simulation des Motors unter Benutzung bekannter Integrationsmethoden auf einen Digitalrechner gut geeignet. Es wird eine Methode zur Untersuchung des stationären Zustands mit Hilfe von Signalflußdiagrammen vorgelegt. Diese Methode weist gegenüber der Darstellung im Zustandsraum einige Vorteile auf. Anhand der Lösungen wird gezeigt, daß der Fluß sich sinusförmig ändert und in den Ständersträngen sinusförmige Spannungen mit überlagerten Spitzen induziert.
    Notes: Contents The performance equations of an induction motor operating on a current source inverter are derived using a stationary reference frame of two of the three phases. The equations are well suited for simulation of a current controlled inverter fed induction motor on a digital computer using well known numerical methods of integration. A method is presented for the steady state analysis via state transition signal flow graph. This method is found to offer several advantages over the methods available in the literature using state space techniques. The steady state solution of the equations can be used to show that the rotor flux varies sinusoidally and it induces a sinusoidal voltage in the stator phases accompanied with voltage spikes during commutation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01580210
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  • 6
    Electronic Resource
    Electronic Resource
    On the steady-state analysis of the inverter-fed induction motor (1977)
    Springer
    Electrical engineering 59 (1977), S. 337-343 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Übersicht Es wird in der vorliegenden Arbeit das stationäre Verhalten der stromrichter-gespeisten Asynchronmaschine auf Grund des Signalflußdiagramms untersucht. Die Anwendung der Masonschen Regel liefert unmittelbar die, State Transition Matrix' mit einem CPU-Zeitaufwand, der geringer ist, als der der in der Literatur bekannten Methoden. Beliebige Eingangssignale lassen sich in einfacher Weise behandeln, da diese im Signalflußdiagramm repräsentiert werden können.
    Notes: Contents The analysis of the induction motor based on the signal flow graphs is carried out. It is shown that the state transition matrix can be determined in a systematic and straightforward way using Mason's gain formula. This method is found computationally very much superior to other methods available in the literature. There is a considerable reduction in the CPU time. The presence of an input signal also does not pose any problems, as inherently the transition signal flow graph includes its effect also.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01578221
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    On the analysis of induction motor with square wave currents in the rotor via state transition signal flow graph technique (1984)
    Springer
    Electrical engineering 67 (1984), S. 381-385 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Übersicht Für einen Asynchronmotor werden die Spannungsgleichungen in einem auf zwei Strangachsen bezogenen läuferfesten Koordinatensystem aufgestellt. Diese Gleichungen werden zur Analyse des stationären Verhaltens bei rechteckförmigen Strömen im Läufer und sinusförmigen Spannungen am Ständer angewendet, und führen über Signalflußdiagrammdarstellung zu einer geschlossenen Lösung. Der Ständerstrom hat schlupfabhängigen Schwingungen. Das Drehmoment enthält Schwankungen, die Komponente sechster und zwölfter harmonischen Ordnung des Schlupfes entsprechen.
    Notes: Abstract The performance equations of an induction motor are given in the rotor reference frame of two of the three phases. These equations are used to analyse the steady state performance of an induction motor with square wave currents in the rotor and sinusoidal voltages on the stator. A closed form solution for stator flux linkages in the time domain is obtained using state transition signal flow graph technique. It is found that the stator current is essentially sinusoidal superimposed by slip dependent harmonics. The torque developed by the motor has pulsations both at six times and twelve times slip frequency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01614881
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Stability analysis of a variable frequency induction motor usingD-decomposition method (1985)
    Springer
    Electrical engineering 68 (1985), S. 345-353 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Übersicht Zur Bestimmung der Stabilitätsgrenzen eines mit variabler Frequenz gespeisten Asynchronmotors wird die Methode derD-Zerlegung verwendet. Diese zeichnet sich gegenüber dem klassischen Verfahren wie dem Wurzelortsverfahren, dem Nyquist-Kriterium und dem Routh-Hurwitz-Kriterium durch Einfachheit und Direktheit aus. Infolge der Verwendung der Parkschen Transformierten stellen sich die Spannungsgleichungen der Maschine lediglich als System dritter Ordnung, jedoch mit komplexen Koeffizienten dar. Das Modell wird für kleine Abweichungen linearisiert; danach erfolgt die Untersuchung der Auswirkungen von Parameteränderungen, u. a. der Widerstände von Stator und Rotor sowie der Streureaktanz, auf den Stabilitätsbereich des Motors.
    Notes: Contents D-decomposition technique is used to determine the stability/instability regions of a variable frequency induction motor. The technique is more simple, straightforward and elegant when compared to the conventional classical methods like root locus technique, Nyquist criterion and Routh-Hurwitz criterion. The machine equations are used in Park's vector notation which reduces the order of the system equation to three. The equation, however contains complex coefficients. The linearised model based on small displacements is used in the stability analysis to investigate the effects of variation of machine parameters such as stator and rotor resistances, leakage reactances etc. on the stability regions of the motor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01573585
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Geophysical study of a seamount located on the continental margin of India (1991)
    Springer
    Geo-marine letters 11 (1991), S. 71-78 
    Details
    ISSN: 1432-1157
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Bathymetric, magnetic, and gravity data obtained over a 2,464 m high seamount located in the Arabian Sea indicate that the seamount (inferred mean density=2.65 gm/cc) extends for 1 km beneath the seafloor and is locally isostatically compensated. With a reversely magnetized upper part and normally magnetized base, the seamount was probably formed by at least two volcanic episodes. The base was formed during the Late Paleocene (ca. 58 Ma) while the Indian Plate was moving over the Reunion hotspot. A renewed period of volcanism, contemporaneous with the major changes in direction of Indian Plate motion during the early Oligocene (ca. 36 Ma) probably formed the cap.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02431032
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    An ESR study of reduced vanadium(V) oxide catalyst on .gamma.-alumina carrier (1984)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 88 (1984), S. 2622-2624 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150656a039
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    Paper (German National Licenses)
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