Operating principle and I/O control 17
SPRS connection diagram
.
Component Function
Inverter (INV) Connected to rotor winding. Modulates the
amount of power fed back into the power
system and controls motor speed.
Converter (ISU) Connected to power system.
Transformer Matches system voltages.
Synchronization unit Uses the zero crossing transformer for
bumpless transfer to SPRS and GRR. Q-
control offers reactive power compensation by
changing the flux length for system power
factor correction, which eliminates the
requirement of capacitor bank.
~
~
HT supply
HT
isolator
Step down transformer
TR
T1 K31
K1
Synchronisation card
~
M
T
GRR
T2
ISU
K4
INV
Motor details
K2
Sine filter
LCL
FILTER
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