Sentence examples for using a variable frequency from inspiring English sources

Initial experiments using a variable frequency drive (VFD) with a standard, single phase pump/motor system have achieved energy savings of 40%.

If the pump speed is controlled using a variable frequency drive (VFD) to maintain design flow irrespective of the tide level, the CWP power consumption can be reduced compared to the case with constant speed CWP.

By replacing old escalators with new ones that use a variable-frequency drive and numerous sensors, positioned near the escalators, officials hope to save on energy costs, and, just as important, reduce the wear and tear on the many mechanical parts in the heavily used machines.

Plasma was generated by applying alternating polarity pulsed (500 Hz –1.5 kHz) voltage of 20 kV magnitude (peak to peak), 1.65 µs pulse width and a rise time of 5 V/ns between the high voltage electrodes using a variable voltage and variable frequency power supply (Quinta, Russia).

Mobility was also investigated using a variable with three categories representing different frequencies of movement over the time period (those who had never moved, those who had moved once and those who had moved two or more times).

The operating pressures were controlled using the variable frequency drive (VFD) of the second pump.

A microwave synthesis of silver nanoparticles involves the reduction of silver nanoparticles using variable frequency microwave radiation as against the conventional heating method.

Design is usually based on cone penetration tests and carried out with equipment specially developed for deep vibratory compaction, in particular, using variable frequency vibrators.

Routine dysfunction was measured using a latent variable manifested by observed frequency of four alcohol-related dysfunctions: hangover, excessive drunkenness, sleeping in clothes because of drunkenness and failing family or personal obligations because of drinking (Fig.  1).

The high resolution ultrasound in general use in radiology or diagnostic imaging departments, uses variable frequency transducers which can adapt to the depth of different tissue layers by modifying the applied frequency and focus without losing resolution.

The characteristics of the women were described using a frequency table for categorical variables and measures of central tendency and dispersion for continuous variables.