presentation day. left to right are chris, ben, and I
completed circuit mounted on display cart. analog gauges show AC line input voltage and current on the left, and DC battery output voltage and current on the right. 8, 12V batteries on a rack below provide a load for the charger
Power Factor Correction (PFC) stage (boost)
output stage (bridge) and transformer
microprocessor control board
manual controls for demonstration, and LCD display showing the circuit running off of a rather low input voltage. display parameters are programmable, and currently show AC input voltage, battery output voltage, and bus voltage (regulated 400VDC)
that's a lot of cooling!
cool magnetics shot
AC line voltage and current into PFC stage, with PFC disabled. standard rectifier-capacitor front end
AC line voltage and current with PFC stage running - sweet! noise on the current (bottom trace) is from scope probes picking up 100kHz switching noise