# Sinusoidal Current

Also found in: Medical.

## sinusoidal current

[‚sī·nə′sȯid·əl ′kə·rənt]
(electricity)

## Sinusoidal Current

an alternating current that constitutes a sinusoidal function of time in the form i = Im sin (ωt + Φ), where i is the instantaneous value of the current, Im is the current’s amplitude, ω is the angular frequency, and Φ is the initial phase angle. Inasmuch as a sinusoidal function resembles its derivative, in all parts of a linear circuit carrying a sinusoidal current the voltages, currents, and induced emf’s are also sinusoidal. The use of sinusoidal currents in technology simplifies electrical devices and circuits, as well as design calculations. [23–1297–]

References in periodicals archive ?
--an increase in power losses of 1.26-1.43 times compared with sinusoidal current at using steel trolley lines.
If sinusoidal PWM method is used for control, the inverter will regulate these current pulses into a sinusoidal current in phase with the grid voltage .
To determine each of these N triangular sinusoidal currents there is N rectangular pulse test functions with unitary amplitude .
It is achieved by using higher switching frequencies in order to form sinusoidal current lower harmonic distortion .
The ACS 2000 design provides near sinusoidal current and voltage waveforms making the drive compatible for use with standard NEMA rated motors.
For increasing input voltage, a DC/DC converter, which allows interaction to the AC mains, not only is used for constant output voltage but also is employed in order to perform the MPP, while inverter stage delivers a sinusoidal current to the utility line.
The testing team noticed that the graphical waveform of the sinusoidal current and voltage provided by the True RMS meter was not well represented by the meter.
where [I.sub.m] is the amplitude of the sinusoidal current. For the R-FSPM motors, the motor torque is predominantly resulted from the PM excitation torque since the reluctance torque is negligible.
"If you connected them to a power supply and applied a sinusoidal current" - an alternating current whose period is very regular - "then it would vibrate.
The DEA instrumentation applies a sinusoidal voltage across electrodes placed in intimate contact with the material being tested at a chosen frequency or multiple frequencies and measures the resulting sinusoidal current. Changes in amplitude and phase of the response are converted into electrical properties.
The voltage on charge is forming by PWM impulses and sinusoidal current depends by number of PWM impulses and modulation.
When a resistive load is driven by a sinusoidal voltage waveform or a sinusoidal current waveform, the average power dissipated by the load is calculated from an RMS voltage measurement.

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