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 .
Control Loops Velocity loop: Adjustable PID controller Current loop: PID controller Sinusoidal current
control reduces torque ripple Build in test Temperature Temp.
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.
It is made of a high internal impedance sinusoidal current
source with a parallel coil to resonate the equivalent input capacitance of the active device.
The drive system developed can supply the sinusoidal current
to the PMSM without the use of position or current sensors.
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.
This current signal is the summation of a sinusoidal current
part and a direct current part because the input current of the converter cannot be below zero.
Measurement of the ATP of the pulsed damped sinusoidal current
Figure 14(a) shows waveforms of the input current the converter takes from the line, output current of the converter, and voltage of the dc-link circuit when EVA coil is driven by sinusoidal current
half-waves at 33.
The active filter operation in the harmonic elimination mode allows an increasing in the power quality due to the achieved sinusoidal current
flowing in the network.
A B6 bridge arrangement of power semiconductors (high-voltage MOSFETs or IGBTs) switches the DC current from the intermediate circuit into a sinusoidal current
that is fed into the respective phase of the transmission and distribution grid.