sinusoidal current


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sinusoidal current

Alternating induced electric current, the two strokes of which are equal.
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They could be powered by a special power supply which was stimulated by a signal generator to produce a sinusoidal current excitation with adjustable amplitude and frequency.
The ITG operates in current-control mode when connected in parallel with the utility power grid, tracking the grid frequency variations up to 5% of nominal and providing a sinusoidal current waveform with less than 5% harmonic distortion.
Optimized sinusoidal current control enables current startup sequencing and low loss space vector pulse-width modulation (PWM) for smoother startup and minimized torque ripple for maximum motor efficiency.
INDRA and CEI-UPM, the consortium that is presenting this proposal, has a wide experience in the area of high performance TRUs for the new aircraft requirementsThe basic architecture that allows for these high performance TRUs has three stages: 1) EMI filter to meet the EMI standards, 2) Active Three-Phase rectifier to control the demanded sinusoidal current (THD and PFC) as well as control the output dc voltage (VBUS DC) and 3) isolated dc/dc converter that provides galvanic isolation, adapts the voltage and power to the specifications (28V) and it can be in charged of some control capabilities (battery charge mode, voltage source mode, current source mode, some protections).
These solutions consist of a step-up converter interface that outputs a constant voltage while drawing a sinusoidal current from the mains.
The iMOTION platform enables sensorless sinusoidal current control, completely eliminating Hall Effect sensors and delivering smooth torque over an extended speed range.
IR's iMOTION(tm) integrated power design platform enables energy-saving, variable-speed sinusoidal current control without the need for position sensors for smooth torque output and lower acoustic noise in motors.