Overload Capability; Hardware Principles; Basic Principles - INVT Goodrive880 Series Hardware Manual

Goodrive880 Series Regenerative Rectifier Unit Hardware Manual

2.4 Overload capability

Based on the light overload continuous run current (I
at 110% of the rated current. See
Based on the heavy overload continuous run current (I
at 150% of the rated current. See

2.5 Hardware principles

2.5.1 Basic principles

The regenerative rectifier, a four-quadrant rectifier system, mainly consists of regenerative rectifier filter
unit and regenerative rectifier unit. It is used with the pre-charge circuit and control unit. The intermediate
DC voltage can supply the subsequent inverter modules. One or more inverter modules can be installed.
The regenerative rectifier converts 3PH AC voltage into DC voltage, and the DC voltage can supply the
subsequent inverter modules to drive motors. It can also feed the regenerative energy of the motor back to
the grid. The regenerative rectifier filter unit, which is the filter, is used to suppress input or regenerative
current harmonics.
The regenerative rectifier mainly consists of AC fuse, regenerative rectifier filter unit, and DC fuse.
shows the simplified main circuit.
202401 (V1.0)
Figure 2-3.
Figure 2-3 Light overload application
Current (A)
Short-time overload current150%I
10s
Short-time
overload current 110 %I
Light overload
rated current I
60s
300s
Figure 2-4.
Figure 2-4 Heavy overload application
Current(A)
Short-time overload current 180%I
Short-time
10s
overload current 150%I
Heavy overload
rated current I
60s
300s
), the regenerative rectifier can keep running for 60s
Ld
LD
10s
Rated
LD
current
LD
60s
Time (s)
), the regenerative rectifier can keep running for 60s
Hd
HD
10s
HD Rated
current
HD
60s
Time (s)
Product overview
Figure 2-5
7