Global ETD Search
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Showing 1 to 7 of 7 for “"AC Drive"”.
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Structure-Property Relationship Investigations of Higher and Lower Valent Modified Lead Zirconate Titanate Ceramics
… of strong nonlinearities and induced relaxor characteristics under moderate AC drive for lower La-content compositions. TEM investigations demonstrated a breakdown of ferroelectric domains with increasing AC drive, resulting in anomalous AC field effects.
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Programmable window : a large-scale transparent electronic display using SPD film
… and evaluating different strategies to address, drive and control the independent transparency levels of an SPD pixel array. Although passive matrix multiplexing can also be implemented, it is determined that a directly addressed, multi-line strobing technique is best suited given the constraints …
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DSP controlled three phase to single phase uninterruptible power supply
… such as personal computers, network stations and AC drive conrollers, an increased "polution" of the AC mains has resulted in the form of unwanted harmonics generated by the switching currents associated with these devices. Combined with the problem of mains "pollution" is the problem of balancing …
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Hybrid PWM Update Method for Time Delay Compensation in Current Control Loop
… very high quality digital current control can be achieved, such as a high closed current loop bandwidth, strong robustness against disturbances, ability to reach a very high fundamental frequency compared to switching frequency, etc. In a conventional digital control implementation, a sampling …
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Low frequency charge-density wave dynamics
… I-V curve. Noise measurements performed with an ac drive current characterized the fluctuations and showed that other parameters, in addition to the threshold, must be fluctuating to fully account for the fluctuations. In mesoscopic samples, the observation of discrete switching in the voltage …
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PWM Techniques for Control of Dual-Inverter Supplied Six-Phase Drives
Among the different multiphase ac drive solutions, one of the most widely reported in the literature is the six-phase machine. The machines can be realised into two different configurations, symmetrical and asymmetrical. For the symmetrical configuration, the stator winding consists of two sets of …
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WBG-based Current Source Inverter for Motor Drive Application [Inverter a Corrente Impressa con dispositivi WBG per azionamenti elettrici]
… di modulazione basate sulla modulazione Space Vector (SVM), comprese le principali sequenze di commutazione adottate. Il contributo principale riguarda la generalizzazione di tutti i possibili schemi di commutazione, tenendo conto delle permutazioni dei tempi degli stati attivi e nulli. …