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This paper deals with the stability analysis of symmetrical induction motor. The symmetrical induction machine may become unstable over a range of frequencies even though the machine operates from a balanced, sinusoidal, zero impedance source. Small displacement equations valid for small excursions about an operating point are established from the machine equations expressed in synchronously rotating...
A new electronically tunable current-mode high-Q bandpass filter employing second-generation current controlled conveyor (CCCII)-based first-order all-pass filters is presented. The proposed filter uses only three CCCIIs, one current-controlled resistor and two grounded capacitors. The center frequency (??c) and the quality factor (Q) can be independently adjusted through the bias current of the CCCII...
Enhanced analytical equations are derived to predict the inductance and series resistance of a common active inductor configuration. The equations, based on MOSFET small-signal parameters, are used to predict the inductance and series resistance of an active inductor implemented in a 0.18 ??m CMOS process. The inductor's characteristics are presented, demonstrating analytical equation accuracy and...
In view of large variation of output voltage of the self-excited single-phase induction generator, this paper presents a connection method of voltage self-regulation of the single-phase self-excited induction generator with series capacitance, which decreases the generatorpsilas voltage variation rate. The operation of self-excited single-phase of the three-phase induction generator is analyzed by...
Normal temperature close-loop-self-circulating (CLSC) evaporative cooling technology is a newly developed concept for the cooling of large electromagnetic equipment, and it can work under a quite low pressure. The local pressure drop of abrupt expansion and abrupt contraction structure in the inlet box of the condenser occupies an important proportion of the total pressure drop of the cooling system...
A new approach employing the circuit analysis theory instead of electromagnetic field theory is presented to calculate the rotor resistances and inductances of single-phase induction motors. The resistance and inductance parameters are obtained at positive sequence and negative sequence frequencies, respectively, with skin effect consideration. The rotor bar is divided into many thin-layers with their...
A part of the signaling systems related to a rapid transit railway is using the track circuit to detect trains and to deliver train operation services on carriage. Because the interval of one block for a rapid transit railway is as long as 1500 [m], transmission of signal information throughout a track circuit has some troubles. So a compensation capacitor should be installed every 20 [m]. Moreover,...
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