Goodrive350 IP55 High-ingress Protection Series VFD
Product Overview
-8-
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
The Goodrive350 IP55 high-ingress protection series VFD is used to control asynchronous AC
induction motor and permanent-magnet synchronous motor. The figure below shows the main
circuit diagram of the VFD. 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.
Figure 3-1 (015G/018P and below) main circuit diagram
R
S
T
U
V
W
（+）
（-）
PE
PE
PB
Figure 3-2 018G/022P
–110G (inclusive) main circuit diagram
R
S
T
U
V
W
（+）
（-）
PE
PE
PB
Note:
1. VFDs of 018G/022P
–110G (inclusive) are equipped with built-in DC reactors.
2. Built-in brake units are included in the standard configuration of 037G/045P or lower models.
The models that carry built-in brake units can also be connected to external brake resistors.
The brake resistors are optional parts.
3. VFDs of 045G/055P
–110G models support optional built-in brake units. A VFD model with
built-in brake unit ends with "-B", for example, GD350-045G/055P-45-AS-B.
