Multiple Regen, Multiple Motoring System - Emerson SP1201 Installation Manual

Safety Product
Introduction
Information information
2.8.3

Multiple Regen, multiple motoring system

Figure 2-5 shows a multiple regen drive system with multiple motoring drives. For this configuration the regen drives are sized to the total power
requirement of all motoring drives.
NOTE
For the multiple regen and multiple motoring drives arrangement there are two possible options for the required start-up circuit. This can either consist
of a Unidrive SPMC rectifier module (for example an SPMC 1402 is capable of charging a maximum DC Bus capacitance of 66mF) or an external
charging resistor as detailed in Chapter 4 System design on page 30.
Special care should be taken when designing a multiple regen and multiple motoring drive system ensuring that all the required fusing is in place on
both the common DC Bus connections and the AC supply to all regen drives.
Figure 2-5 Multiple Regen, multiple motoring system
Additional
Circuitry
Additional
Circuitry
L1
L2
L3
Additional
Circuitry
Additional
Circuitry
External
charging
circuit
Charging circuit can
consist of either
Unidrive SPMC
solution or external
charging circuit
(Unidrive SPMC
recommended)
NOTE
All drives paralleled must be of the same frame size, and a derating also
applies as specified in Chapter 3 Product Information on page 12
Unidrive SP Regen Installation Guide
Issue Number: 2
System Mechanical Electrical
design installation installation
Regen Drive
U
+DC
V
W
Regen Drive
U
+DC
V
W
Regen Drive
U
+DC
V
W
Regen Drive
U
+DC
V
W
SPMC
L1
+DC
L2
-DC
L3
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Getting
Optimisation Parameters
started
DC Bus
Connections
Motoring Drive
+DC
-DC -DC
Motoring Drive Motoring Drive
+DC
-DC -DC
Motoring Drive Motoring Drive Motoring Drive Motoring Drive
+DC
-DC -DC
Motoring Drive
+DC
-DC -DC
Technical Component
data sizing
U
Motor
V
Connection
W
U
Motor
V
Connection
W
U
Motor
V
Connection
W
U
Motor
V
Connection
W
Diagnostics
11