Envipco FLEX Dual, Service Manual

Page: 54 / 114

3-23
AC Motor Control Box
FIGURE 3-22.
MC1 Board Layout
3.8.1. Terminal Block
This component receives the incoming single-phase
AC
power from the power cord. It is located
inside of the
AC
box, as shown in Figure 3-21.
3.8.2. Variable Frequency Drive
The Variable Frequency Drive
(
VFD
)
converts single-phase input to three-phase output for the
compactor motor. It varies the frequency of output to govern the speed of the compactor, and it
monitors the amperage for current overload. If the compactor stalls and causes a current overload
for a certain amount of time, the
VFD
shuts down power to the compactor motor.
3-26