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Transistor-oscillator induction-motor drive
Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics, 1958Transistor and saturable-core-transformer oscillators driving small 2-phase induction motors provide, in effect, a d-c motor without a commutator. The inductive, motor load on the oscillators requires that the transistors carry current in both directions and this is aided by shunting the transistors with rectifiers.
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Induction motors for synchronized drives
Electrical Engineering, 1949THERE are two types of synchronized drives of two or more mechanically independent shafts commonly known: one is the “power selsyn” or “synchro-tie;” and the other might be called the “simplified selsyn.” The first system uses, besides one or more prime movers, individual selsyn motors for synchronizing.
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Induction motor drive with matrix converter
Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95, 2002Control methods of the three-phase induction motor supplied by 3, 6, 9, ... phase matrix converters are investigated by means of using Park-vector representation. The motor voltage is only constructed from the possible rotated and zero value voltage vectors. It is shown that motor harmonic losses and torque pulsations can be kept at low values with the
S. Halasz, I. Schmidt, T. Molnar
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Concatenated induction motors for rolling mill drive
Proceedings of the American Institute of Electrical Engineers, 1914The paper describes a six-speed concatenated induction motor set for driving the finishing rolls of a 12-stand continuous mill. Analysis of the conditions in this mill showed that the use of a low-pressure turbine would lead to the waste of a large amount of exhaust steam and that the alternating-current turbine plant which was in operation had ample ...
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Control of Induction Motor Drives
1985When comparing the dynamic model of a separately excited DC machine, Eqs. (5.1–5.4), Fig. 5.4, with that of an AC induction machine, Eqs. (10.38–10.41), Fig. 10.16, it is obvious that the latter represents a much more complex control plant. This is caused by the fact that the main flux and the armature current distribution of a DC machine are fixed in ...
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Vector Control of Induction Motor Drives
2010For applications where high degree of accuracy in speed control is not required simple methods based on steady state equivalent circuit have been employed. Since the speed of an induction motor in rev.
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Two-phase induction motor drives
2004There is a continuous debate today concerning the ?motor of the future? for low-power applications requiring less than 1-2 kW. The specialists are focusing on superior motors [1] like brushless-dc, permanent-magnet synchronous, or electronically commutated types, because they show improvements in efficiency, reliability, torque-per-volume/mass ratio ...
Blaabjerg, Frede +3 more
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