Results 261 to 270 of about 2,325 (293)

New 3-phase invertor circuit

Proceedings of the Institution of Electrical Engineers, 1968
A 3-phase variable-frequency invertor is described. It is capable of controlling the output voltages by an on-off method. The commutation circuit is simple, and is so arranged that the invertor output voltages are independent of the load conditions. The triggering circuit and a protection scheme are also described.
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Invertor drives for induction motors

Students Quarterly Journal, 1972
Induction motors have many advantages for industrial use, but the only simple and efficient way of controlling their speed is by using static invertors to supply them with variable-frequency, variable-voltage a.c.
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Adjustable frequency invertors and their application to variable-speed drives

Electronics and Power, 1964
The paper with the above title is published in this month in the Proceedings. It will be read at a meeting of the Power Division on the 17th November at Savoy Place. Separate copies of individual papers are available, free of charge if called for at Savoy Place before the meeting, or 2s. by post.
D.A. Bradley, C.D. Clarke, R.M. Davis, D.A. Jones   +3 more
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Characterization of GaN Switches for Solar Invertors

ECS Transactions, 2014
To improve the efficiency of a solar cell application, two areas of focus are necessary. The first is to improve the quality of the solar panels; and the second is to increase the inverter efficiency, which can be accomplished by using high frequency switches with low on-state and switching losses. GaN has a significantly bigger bandgap compared to Si
Tanya Gachovska, Nikolay Radimov, Chris Gerolami, Ray Orr, Jerry L Hudgins, Krishna Shenai   +5 more
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Invertor compensation in Germany

Institute of Legal Myongji University
In Germany, company employees who make invention during the term of their employment, so-called “service inventions”, are subject to the German Act on Employee Inventions, which regulates the rights and obligations of both employees and employers. There are statutory guidelines as to the amount of compensation the inventor should be paid.
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Invertor-fed synchronous motors with induced excitation

Proceedings of the Institution of Electrical Engineers, 1974
Invertor-fed brushless synchronous motors are described, in which the harmonic content of typical invertor-supply waveforms is utilised to produce rotor excitation in wound rotors with shaft-mounted diodes. Particular attention is paid to a 3-phase star-connected rotor, connected to two diodes, and a salient-pole rotor with a single diode.
B.J. Chalmers, A.L. Mohamadein, A.C. Williamson   +2 more
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Optimal surplus harmonic energy distribution [in PWM invertors]

IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200), 2002
A new optimal programmed PWM technique is described. The voltage total harmonic distortion at the output of an L-C filter connected to a PWM inverter is minimized. The proposed technique can be directly applied to constant frequency, constant amplitude sinusoidal power supplies such as uninterruptible power supplies.
null Li Li, D. Czarkowski, J. Dzieza
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Reliability of Isokinetic Torque Values for Ankle Invertors and Evertors

Journal of Orthopaedic & Sports Physical Therapy, 1990
Partially funded through a grant from the Children's Hospital Los Angeles, School of Physical Therapy Alumni Association. The main purposes of this study were to determine the reliability of an isokinetic, inversion/eversion torque test with and without range of motion targets, as well as to assess the effects of a plantarflexion position and of limb ...
M, Leslie, J E, Zachazewski, P, Browne
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Magnetic-film-controlled invertor and isolator

Proceedings of the Institution of Electrical Engineers, 1964
The paper describes the principle of operation of an arrangement of conductors that is closely coupled to a magnetic film and can act as a signal invertor, modulator or isolator. The transmission characteristic is determined by the currents flowing in control conductors, which alter the film permeability.
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Static-invertor systems tor emergency supplies

Electronics and Power, 1973
If the power supply to a hospital operating theatre fails, the consequences can be fatal. In industry, the loss of power can have serious economic consequences. Standby supplies are therefore an essential part of industry, and static-invertor systems are one possibility.
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