DRV-28 inverter
s Product overview
-8-
Chapter 3 Product overview
3.1 What this chapter contains
This chapter mainly introduces the operation principles, product features, layouts, nameplates and
model instructions.
3.2 Basic principle
DRV-28 series inverter is used to control asynchronous AC induction motor and permanent-magnet
synchronous motor. The figure below shows the main circuit diagram of the inverter. The rectifier
converts 3PH AC voltage into DC voltage, and the capacitor bank of intermediate circuit stabilizes the
DC voltage. The inverter converts DC voltage into the AC voltage used by AC motor. When the circuit
voltage exceeds the maximum limit value, external brake resistor will be connected to intermediate
DC circuit to consume the feedback energy.
R
S
T
U
V
W
(
+
)
(
-
)
PE
PE
PB
Fig 3.1 400V (15kW and below) main circuit diagram
R
S
T
U
V
W
(
+
)
(
-
)
PE
PE
PB
Fig 3.2 400V (18.5kW
–110kW (inclusive) ) main circuit diagram