Analysis and compensation of the dead time on inverters Conference Paper uri icon

abstract

  • In inverters it is necessary to include a `dead time%27 in switching signals in order to avoid the simultaneous conduction of the devices on the same electrical trajectory or leg. This produces a modification on commutation real angles respect to the theoreticals. In this paper, an analysis and compensation of the dead time effects in inverters is presented. It is shown that the dead time generates a decrease in the magnitude voltage of the harmonic fundamental and an increase in the low order harmonics. The paper also includes the implementation of a technique to compensate the dead time; this technique is applicable to sinusoidal and programmed PWM techniques. The analysis and compensation of the dead time are validated by means of experimental results in a three phase inverter for an induction motor drive and a single phase UPS.
  • In inverters it is necessary to include a `dead time' in switching signals in order to avoid the simultaneous conduction of the devices on the same electrical trajectory or leg. This produces a modification on commutation real angles respect to the theoreticals. In this paper, an analysis and compensation of the dead time effects in inverters is presented. It is shown that the dead time generates a decrease in the magnitude voltage of the harmonic fundamental and an increase in the low order harmonics. The paper also includes the implementation of a technique to compensate the dead time; this technique is applicable to sinusoidal and programmed PWM techniques. The analysis and compensation of the dead time are validated by means of experimental results in a three phase inverter for an induction motor drive and a single phase UPS.

publication date

  • 1996-01-01