Even though the compensation of dead-times can be
done on the basis of current sign measurement, never it is
perfect since the turn-on/turn-off times are not known
exactly and are depending on many factors [11], leading to
either an over-compensation or under-compensation.
Due to the multiple zero crossings, when the output current
is with ripple, dead-time has different influence on output
voltage, as well as on its harmonic spectrum. An
analysis is given in [12], where is proposed a resonant
controller to compensate for relevant harmonics introduced
by dead-time.
In this paper a brief review of the dead-time effects in
three-phase inverters is presented first, which is almost well
known and investigated. Further on, the effect of multiple
zero crossings of output current is introduced by analytical
developments and verified with numerical simulations by a
realistic circuit model.
Even though the compensation of dead-times can be
done on the basis of current sign measurement, never it is
perfect since the turn-on/turn-off times are not known
exactly and are depending on many factors [11], leading to
either an over-compensation or under-compensation.
Due to the multiple zero crossings, when the output current
is with ripple, dead-time has different influence on output
voltage, as well as on its harmonic spectrum. An
analysis is given in [12], where is proposed a resonant
controller to compensate for relevant harmonics introduced
by dead-time.
In this paper a brief review of the dead-time effects in
three-phase inverters is presented first, which is almost well
known and investigated. Further on, the effect of multiple
zero crossings of output current is introduced by analytical
developments and verified with numerical simulations by a
realistic circuit model.
การแปล กรุณารอสักครู่..
