Variable Pulse Width and Frequency of Chopper

by

Variable Pulse Width and Frequency of Chopper

Q. Explain with waveforms the control techniques used for chopper control.

Variable Pulse Width and Frequency of Chopper

  • The average output voltage of the chopper is determined by the ratio TON /T.

                    VLdc = (TON / T) x V volts

  • Thus both the pulse width TON and the frequency 1/T may be varied so as to get a particular value of (TON / T).
  • In some choppers TON is not explicitly controlled but its value is dependent on the load.
  • The user then varies the chopping frequency to obtain the required value of average load voltage.

Leave a Comment