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This study deals with the current control of three-phase inverters connected to the grid by means of LCL filters. The control action is given by the feedback of the filter states, in coordinates αβ0, and of the internal states of resonant controllers. The control gains are computed by means of an optimal linear quadratic regulator that is robust to uncertain and time-varying parameters related to...
Driving current of a moving coil loudspeaker, fed from a switched voltage-mode audio amplifier, display non-ideal transfer characteristic relative to the reference audio signal. This is chiefly due to the effective speaker voice coil electrical impedance and phase lag provided by the output filter. This study investigates the deviation in the transfer characteristics from the ideal constant gain and...
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