INVT Goodrive GD35-5R5G-4-H1 - Chapter 3 Product Overview; What this Chapter Contains; Basic Principles

Goodrive35 Series Closed-loop Vector Control VFD Product overview
7
Chapter 3 Product overview
3.1 What this chapter contains
The chapter briefly describes the operation principle, product characteristics, layout, name plate and
type designation information.
3.2 Basic principles
Goodrive35 series VFDs are wall, floor and flange mountable devices for controlling asynchronous
AC induction motors and permanent magnet synchronous motors. It supports wall, fange, and floor
installation.
The diagram below shows the simplified main circuit diagram of the VFD. The rectifier converts
three-phase AC voltage to DC voltage. The capacitor bank of the intermediate circuit stabilizes the
DC voltage. The inverter transforms the DC voltage back to AC voltage for the AC motor. The brake
pipe connects the external brake resistor to the intermediate DC circuit to consume the feedback
energy when the voltage in the circuit exceeds its maximum limit.
R
S
T
U
V
W
（+）
（-）
PE PE
PB
Figure 3-1 The simplified main circuit diagram (VFDs of 380 V≤30 kW)
R
S
T
U
V
W
（+）
（-）
P1
PE PE
DC reactor
Figure 3-2 The simplified main circuit diagram (VFDs of 380 V≥37 kW)