Input; Housekeeping Supply; Inverter; Output - Advanced Energy Pinnacle 20 kW Manual

AC In

Figure 2-1. Pinnacle functional block diagram

INPUT

In the input section, ac line voltage is applied through the circuit breaker to a three-phase
contactor. The contactor, when closed, delivers the line voltage to a rectifier bridge, where it is
converted to dc. The dc voltage is applied to bus capacitors through soft-start circuitry. This
bus provides dc voltage to the inverter section. The input section also provides power to the
housekeeping section.

HOUSEKEEPING SUPPLY

The housekeeping supply section provides low voltage to power the electronic circuits within
the Pinnacle unit.

INVERTER

The inverter section converts dc to high-frequency voltage by alternating the current through
switching transistors.

OUTPUT

In the output section, an isolation transformer steps up the high-frequency voltage from the
inverter section and sends it to a full-wave rectifier bridge.
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Inverter
DC
Input
Section
Section
Unit A
Control Panel
Housekeeping
Display
Section
Inverter
Section
Unit B
Output
Section
Logic
Control
Output
Section
Theory
Pinnacle™ 20 kW
Output DC Out
Measurement
Unit A
Remote
Interfaces
Output
DC Out
Measurement
Unit B
2-3