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Search results for: frequency
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Year: 2009, Volume: 9, Issue: 2
... ] (2) 100 100 100δ KC p was based on the hybrid engine built in our laboratory. The number of phases is denoted by m1, the frequency of II. EQUIVALENT CIRCUITS supply voltage by f1 (in [Hz]), the number of coils on phase By analogy with the characteristics of asynchronous ...
Year: 2009, Volume: 9, Issue: 1
... 2002. Oxford university press, 2005. [5] S.Jayalalitha,, V.Jayashankar, "A correlation method for detection [13] V.Jeyabalan, S.Usa, "Frequency domain correlation techniques of partial discharges in transformers," IEEE Transaction on power for location of partial discharge in transformer windings", IEEE- delivery, Vol.21 ...
Year: 2009, Volume: 9, Issue: 1
... technique is Teeth pairing with cogging torque has a periodic shape versus the mechanical different tooth width [5]. Some researchers proposed opti- position thus, from frequency analysis point of view, to mizing of the magnet pole span to pole pitch ratio [2 ], [3 ], cancel the vibration related to ...
Year: 2009, Volume: 9, Issue: 1
... condition is better) using the channel mixer, the frequency synthesizer, the active filters at the estimation result ... T. H. Lee, The Design of CMOS Radio-Frequency Integrated Virtual antenna arrays," in PIMRC, ... 4π )2 d k Ml N f narrowband, frequency-flat Rayleigh fading channels and Gt Gr λ 2 ( ...
Year: 2009, Volume: 9, Issue: 1
... that the rotor speed is estimated from In the following we discuss about the slip frequency and easily available voltages and currents of the induction speed estimation using monitored stator ... said before, the induction motor speed estimator is based on the introduction of a constant-frequency carrier signal in the stator currents. For that the PWM reference voltage ( ...
Year: 2009, Volume: 9, Issue: 1
... 10mH, 15mH, 20mH and 25mH ma (sin ω m t+ 0.16 sin 3ω m t)+; ω m t 2π respectively). The frequency commutation is fc=5kHz, the 3 3 frequency modulation is fp= 50Hz, the frequency modulation ratio is mf= fc/fp=100, ...
Year: 2009, Volume: 9, Issue: 1
... ,t [1 cos(2π • frΔ)]+ (1) TS r =1 source of interference to narrowband systems operating in the 2 same frequency interval and deny harmless coexistence of Sg( f) 2 t 1+ q UWB-PPM and narrowband systems. A new code denoted as+ 2 •[ ...
Year: 2009, Volume: 9, Issue: 1
... The two design. variants are identical in main characteristics, but they differ In-wheel motor is placed inside the front wheel, with in internal geometry and needed pulse frequency. inner stator fixed on the imobile shaft and outer rotor fixed on the front wheel rim through spokes. Mechanical TABLE II. MAIN ELECTROMECHANICAL DATA Component Symbol ...
Year: 2008, Volume: 8, Issue: 2
... University Chernivtsi, Ukraine, Kotsiubynsky str. 2, 58012 m.ivanchuk@chnu.edu.ua Abstract — Improvement of an autodyne Nuclear quadruple resonance spectrometer is offered. The change of frequency of oscillatory LC circuit of the spectrometer is carried out in two ways: by varicap and variable capacitor. A processor module for the capacitor and varicap control ...
Year: 2008, Volume: 8, Issue: 2
... . An autonomous device is built around a low-cost hardware platform, targeting to work with low- power consumption, but without compromising the measurement accuracy or the sampling frequency. While the applications of the system are numerous, ranging from monitoring the angles of large construction structures (bridges, large pipes, etc.) or ...
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