Cal Power TrueWave TW5250, Service Manual

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THEORY OF OPERATION TW SERIES
1-10
overall switching frequency of 400 kHz. This high switching frequency allows smaller
filtering components to be used in the output filter network. The gate drive boards
provide isolation between the amplifier control and power boards. The amplifier control
board contains supervisory circuitry that monitors the amplifier bus voltages and output
neutral to chassis voltages for overvoltage conditions. Also monitored are amplifier
heatsink temperatures as well as output voltage and current feedback signals, all of
which are reported back to the Analog board.
1.9 GLOSSARY
DAC: Digital to Analog Converter
DC/DC: DC/DC Converter
HSKP: Housekeeping Supply Board
PFC: Power Factor Correction
Power Factor: Ratio of the real or active power (watts) to the apparent power (VA).
PLL: Phase Locked Loop
PWM: Pulse Width Modulator
QSPI: Queued Serial Peripheral Interface