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Introduction
Motor Control
Accessories
5–2
Introduction
A motor speed control system will obviously include a motor and inverter, as well as fuses for
safety. If you are connecting a motor to the inverter on a test bench just to get started, that’s all
you may need for now. But a fully developed system can also have a variety of additional
components. Some can be for noise suppression, while others may enhance the inverter’s
braking performance. The figure below shows a system with several possible optional compo-
nents, and the table gives part number information.
From power supply
Motor
L1
L3
L2
T1
T3T2
GND
+
+1
RB
AC reactor, or
LCR filter
RF noise
filter
DC link choke
AC reactor
EMI filter
Capacitive filter
–
Braking
resistor
Braking
unit
RF noise filter
Thermal switch
NOTE: The Hitachi part number series for accessories
includes different sizes of each part type, specified by the
–x suffix. Hitachi product literature can help match size
and rating of your inverter to the proper accessory size.
Each inverter accessory comes with its own printed
instruction manual. Please refer to those manuals for com-
plete installation details. This chapter gives only an over-
view of these optional system devices. For more
information on Hitachi inverter system accessories, please
contact your Hitachi sales office or distributor.
Name
Part No. Series
See
page
Europe,
Japan
USA
AC reactor, input
side
ALI–xxx HRL–x 5–3
RF noise filter,
input side
ZCL–x ZCL–x 5–4
EMI filter
(EMC Class A)
NF–CEHx NF–CEHxx 5–4
EMI filter
(EMC Class B)
NF–CEHx,
with FC–Hx
NF–CEHxx,
with FC–Hx
5–4
Capacitive filter CFI–x CFI–x 5–4
DC link choke
—
HDC–xxx 5–4
Braking resistor JRB–xxx–x,
SRB–xxx–x
JRB–xxx,
SRB–xxx
5–9
Braking resistor,
NEMA-rated
—
HRB1-x,
HRB2-x
HRB3-x
5–9
Resistance braking
unit
BRD–xxx BRD–xxx 5–8
RF noise filter,
output side
ZCL–xxx ZCL–xxx 5–4
AC reactor, output
side
ALI–xxx HRL–xxx 5–3
LCR filter
—
HRL–xxxC 5–3
Digital input
expansion card
SJ-DG 5–5
Inverter
(second expan-
sion card site)
Digital input
expansion card
Switch
Breaker,
MCCB or
GFI
Ferrite core
Expansion bay