Catalogs of Michigan-based automobile companies.

Mode of access: Internet.

Catalogs of Michigan-based motor truck companies.

Mode of access: Internet.

Na 1 Nachlass Max Horkheimer, 44 - Korrespondenzen u.a. mit Marthe Roth (p. I 21, 313-463)

2 Briefe und 1 Lebenslauf von Max Horkheimer an Arthur Rosenberg, 1939, 1941; 2 Briefe zwischen Kurt Rosenfeld und Karl Brandt, 22.04.1937, 27.04.1937; 5 Briefe von Kurt Rosenfeld an Max Horkheimer, 1937-19378; 4 Brief und Beilage an Kurt Rosenfeld, 1937-1943; 11 Briefe zwischen Hans W. Rosenhaupt und Max Horkheimer, 1935, 1941, 1942, 1947; 4 Briefe zwischen Samuel I. Roseman und Max Horkheimer, 1939, 03.01.1940; 2 Briefe zwischen J. Rosenstock und Max Horkheimer, 15.07.1946; 2 Briefe zwischen Joseph Adolphe Rosenthal und Max Horkheimer, 09.04.1941, 08.05.1941, sowie Briefwechsel mit Sophie Ries; 2 Briefe zwischen Sophie Ries und Max Horkheimer, 08.05.1941, 11.05.1941; 1 Brief von Max Horkheimer an Lore Woedthke, 08.05.1941; 2 Briefe zwischen Morris Rosenthal und Max Horkheimer, 01.10.1935, 04.10.1935; 1 Brief von Max Horkheimer an das Rosenwald Capital Outlay Fund New York, 30.01.1940; 1 Brief B. Lifschitz an Marthe Roth, 21.04.1937; 1 Brief von Chamorel et Simond an Marthe Roth, 11.06.1937; 1 Brief von F.K. Sung an Marthe Roth, 24.06.1937; 12 Briefe zwischen Marthe Roth und Max Horkheimer, Juli 1937-1938, sowie Briefwechsel mit Louis Vogt; 4 Briefe zwischen Louis Vogt und Max Horkheimer, 10.08.1937, 1937; 1 Brief von Max Horkheimer an Dr. Rothen, 31.01.1935; 1 Umzugsmitteilung von Hans Rothmann; 2 Briefe zwischen Richard C. Rothschild und Max Horkheimer, 11.05.1940, 13.05.1940; 4 Briefe zwischen Ludwig Rothschild, Hilde Rothschild und Max Horkheimer, 1936-15.09.1939; 2 Briefe zwischen S. Rothschildt und Max Horkheimer, 23.11.1940, 29.11.1940; 4 Brief zwischen J. S. Roucek und Max Horkheimer, 1941; 1 Brief von Joseph Rovan an Max Horkheimer, 11.05.1948; 2 Brief zwischen Wilmina Rowland und Max Horkheimer, 13.03.1949, 11.04.1949; 2 Briefe zwischen dem Royal Automobile Club und Max Horkheimer, 26.08.1937, 22.09.1937; 2 Briefe zwischen Royal Motors Inc. und Max Horkheimer, 05.02.1940, 06.03.1940; 1 Beitrag von Nina Rubinstein zur Soziologie des Fremden; 1 Brief von Theodor W. Adorno an Rudd, 09.09.1940; 1 Brief von Jay Rumney an Goldstein, 18.06.1936; 20 Briefe und Beilage zwischen Jay Rumney und Max Horkheimer, 1934- 1937, 1949 sowie Briefwechsel mit D. Mitrany; 3 Briefe zwischen D. Mitrany und Max Horkheimer, 01.12.1937, 1937; 3 Briefe von Theodor W. Adorno an Dagobert D. Runes, 1941; 1 Brief und 1 Beilage von N. Waterman an Georg Rusche, 03.05.1939; 12 Briefe und Beilage zwischen Georg Rusche und Max Horkheimer, 1939-1942 sowie Briefwechsel mit N. Waterman; 1 Brief von N. Waterman an Georg Rusche, 03.04.1939; 2 Briefe zwischen N. Waterman und Max Horkheimer, 21.04.1939, 05.05.1939; 1 Brief von Ruth an Max Horkheimer;

Load modelling : induction motors

Modelling the power systems load is a challenge since the load level and composition varies with time. An accurate load model is important because there is a substantial component of load dynamics in the frequency range relevant to system stability. The composition of loads need to be charaterised because the time constants of composite loads affect the damping contributions of the loads to power system oscillations, and their effects vary with the time of the day, depending on the mix of motors loads. This chapter has two main objectives: 1) describe the load modelling in small signal using on-line measurements; and 2) present a new approach to develop models that reflect the load response to large disturbances. Small signal load characterisation based on on-line measurements allows predicting the composition of load with improved accuracy compared with post-mortem or classical load models. Rather than a generic dynamic model for small signal modelling of the load, an explicit induction motor is used so the performance for larger disturbances can be more reliably inferred. The relation between power and frequency/voltage can be explicitly formulated and the contribution of induction motors extracted. One of the main features of this work is the induction motor component can be associated to nominal powers or equivalent motors

Medium Voltage Drive for Induction Motors Using Multilevel Octadecagonal Voltage Space Vectors

Multilevel inverters with hexagonal and dodecagonal voltage space vector structures have improved harmonic profile compared to two-level inverters. Further improvement in the quality of the waveform is possible using multilevel octadecagonal (18-sided polygon) voltage space vectors. This paper proposes an inverter circuit topology capable of generating multilevel octadecagonal voltage space vectors, by cascading two asymmetric three-level inverters. By the proper selection of dc-link voltages and the resultant switching states for the inverters, voltage space vectors, whose tips lie on three concentric octadecagons, are obtained. The advantages of octadecagonal voltage space vector-based pulsewidth modulation (PWM) techniques are the complete elimination of fifth, seventh, eleventh, and thirteenth harmonics in phase voltages and the extension of linear modulation range. In this paper, a simple PWM timing calculation method is also proposed. Experimental results have been presented in this paper to validate the proposed concept.

Neural network based estimation of torque in induction motors for real-time applications

Induction motors are largely used in several industry sectors. The selection of an induction motor has still been inaccurate because in most of the cases the load behavior in its shaft is completely unknown. The proposal of this article is to use artificial neural networks for torque estimation with the purpose of best selecting the induction motors rather than conventional methods, which use classical identification techniques and mechanical load modeling. Since proposed approach estimates the torque behavior from the transient to the steady state, one of its main contributions is the potential to also be implemented in control schemes for real-time applications. Simulation results are also presented to validate the proposed approach.

Comments on Magnetically levitated micro PM motors by two types of active magnetic bearings

This note clarifies the design of proportional derivative (PD) controllers for the magnetic levitation systems of micro PM motors proposed in the above paper. It is shown that the PD controllers cannot stabilize the described levited micro motors because it is necessary to use other values of parameters for these controllers. We present necessary and sufficient conditions for the stability of the controlled systems described in the paper.

Unbalanced Three-Phase Induction Motors Starting and Arc Welding Machines Short-Circuit Modeling

Three-Phase Induction Motors (TIM) and Arc Welding Machines (AWM) are loads of special behavior widely used in industrial and commercial installations, and therefore may contribute significantly to the deterioration of the quality of energy supplied by utilities. This paper proposes a modeling in constant power of the unbalanced TIM starting using Genetic Algorithm (GA) and AWM short-circuit based on their statics characteristics curves. The proposed models are compared with the conventional models in the literature. The results showed the good performance of the proposed models, allowing a more precise analysis of the real requests of these loads.

Rotor Failure Diagnosis of Induction Motors by Wavelet Transform and Fourier Transform in Function of the Load

This paper presents two diagnostic methods for the online detection of broken bars in induction motors with squirrel-cage type rotors. The wavelet representation of a function is a new technique. Wavelet transform of a function is the improved version of Fourier transform. Fourier transform is a powerful tool for analyzing the components of a stationary signal. But it is failed for analyzing the non-stationary signal whereas wavelet transform allows the components of a non-stationary signal to be analyzed. In this paper, our main goal is to find out the advantages of wavelet transform compared to Fourier transform in rotor failure diagnosis of induction motors.

Near term weight reduction potential in a 1977 General Motors B body vehicle. Final report.

Transportation Systems Center, Cambridge, Mass.

Rewinding and connecting alternating-current motors; fundamental principles involved in applying and checking lap and wave windings in alternating-current-motor stators and rotors together with practical winding procedure and extensive reference data in typical examples completely worked out, in winding diagrams and in 71 special tabulations, for everyday use by maintenance men in industrial plants, by winders in electrical service and repair shops and by students pursuing electrical courses,

Mode of access: Internet.

Operator and organizational maintenance manual (including repair parts and special tool lists) : tester, engine distributor, bench type, 6, 12, and 24-volt distributors, single-phase, 60-cycle, 115-volt (Heyer Products Company Inc., model 168) (4910-392-2939).

"30 September 1963."

Farm motors; steam and gas engines, hydraulic and electric motors, windmills,

Mode of access: Internet.

De la popularité à l’obscurité : Les rouages de la montée et du déclin de Federal Union, Inc. aux États-Unis, 1939-1945

Ce mémoire examine les fondements de la montée ainsi que du déclin de l’organisation non gouvernementale Federal Union, Inc. aux États-Unis entre 1939 et 1945. Ce regroupement, mis sur pied par Clarence K. Streit dans l’optique de faire la promotion de son projet internationaliste décrit dans son livre intitulé Union Now: A Proposal for a Federal Union of the Democracies of the North Atlantic, connut durant la Seconde Guerre mondiale un élan de popularité remarquable qui l’amena à l’avant-scène des débats sur la gestion des relations interétatiques, avant de s’essouffler rapidement, malgré l’intérêt qu’il suscita au cours de ses premières années d’existence. Dans les faits, ce phénomène, s’avéra étroitement lié au contexte historique, à l’idéologie défendue par le mouvement, de même qu’à l’organisation et à la gestion des activités de Federal Union, Inc. Ainsi, par l’étude d’un cas particulier, ce mémoire ouvre une nouvelle fenêtre sur l’internationalisme américain durant la Seconde Guerre mondiale, un champ d’études négligé par les chercheurs. Avec pour principal objectif d’offrir une réflexion articulée sur le fédéralisme mondial, une idéologie toujours très peu étudiée à ce jour par les historiens, cette étude mettra en lumière les rouages expliquant les hauts et les bas de cette ligne de pensée politique à l’époque. Ce faisant, le lecteur sera amené à repenser le mouvement internationaliste américain, traditionnellement perçu comme triomphant au cours de la guerre de 1939 à 1945. Il permettra de surcroît de réfléchir aux facteurs favorisant la transformation de la pensée politique au sein d’une société, tels que l’opinion publique et le rôle des organisations non gouvernementales ainsi que des groupes d’intérêt.