AC-AC Voltage Controllers
AC-AC Voltage Controllers
AC-AC Voltage Controllers
AC Voltage Controller
A type of thyristor power converter which is used
to convert a fixed voltage, fixed frequency ac
input supply to obtain a variable voltage ac
output.
AC Voltage Controller
2 types AC controllers:
- on-off ~ connect & disconnect for
several cycles at a time
- Phase Control ~ switching takes
place during every cycle of the
source, in effect removing some of
the source waveform before it
reaches the load.
AC Voltage Controller
2 types of AC voltage controllers :
- Single Phase AC Controllers
- Three Phase AC Controllers
Single Phase AC Controllers operates with single
AC power supply voltage of 230V RMS @ 50 Hz in
our country.
Three phase AC controllers operate with 3-phase
ac supply from 400V @ 50Hz supply frequency.
Applications: lighting/illumination control in power
circuits, induction heating, industrial & domestic
heating, transformer tap changing, etc.
Output voltage
Output
voltage vs delay angle
Example 5.1
connecting
/disconnecting the load
from AC source by gate
control of the SCRs