Owner's manual
800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA
369
O
peratio
n
El
ec
tr
ica
l F
ea
t
u
r
es
Electrical Operation
G
eneral
B
elimo non-spring return actuators utilize Halomo sensorless Brushless D
C
motor
t
echnology developed by Belimo. The non-spring return actuators use this motor in
c
onjunction with an Application Specific Integrated Circuit (ASIC). The Halomo ASIC
provides the intelligence to provide a constant rotation rate to prevent damage to
t
h
e
ac
t
ua
t
o
r
.
Initializati
on
When a power source is applied the motor carries out an initialization of the
actuator. The purpose of this initialization is to determine the mechanical angle of
rotation and to adapt the running time to the angle of rotation. When power is
applied, the internal microprocessor recognizes that the actuator is at its full-safe
position and uses this position as the base for all of its calculations.
Brushless DC Motor O
p
eration
B
elimo’s Halomo sensorless brushless DC motor spins by reversin
g
the poles of
stat
i
onary e
l
ectromagnets
h
ouse
d
i
ns
id
e rotat
i
on permanent magnets.
Th
e
e
lectromagnetic poles are switched by a special ASIC developed by Belimo. Unlike
t
he conventional DC motor, there are no brushes to wear or commutators to foul.
M
o
t
o
r P
o
s
i
t
io
n Detect
ion
B
elimo's Halomo motor technolo
g
y is a sensorless, brushless DC motor. The
H
alomo technolo
g
y eliminates the need
f
or potentiometers
f
or positionin
g
. The
H
alomo ASIC detects the spinnin
g
rotor by monitorin
g
the back EMF of the motor
poles. The A
S
I
C
counts these pulses and calculates position within 1
/
3 of a motor
revolution
.
Overl
o
ad Pr
o
tecti
o
n
The Belimo non-spring return actuators are electronically protected from overload at
all an
g
les of rotation by di
g
ital technolo
g
y in the ASIC. The ASIC circuitry constantly
monitors the rotation of the brushless DC motor inside the actuator and sto
p
s the
pu
l
s
i
ng to t
h
e motor w
h
en
i
t senses an over
l
oa
d
.
Th
e motor rema
i
ns energ
i
ze
d
an
d
produces
f
ull rated torque when in overload.
The overload
f
iltration helps increase the actuators installed li
f
e expectancy by
f
ilterin
g
out unnecessary control si
g
nal chan
g
es or end-stop pulsin
g
while in
overload. This helps ensure that dampers are
f
ully closed and that ed
g
e and blade
seals are always properly compressed
.
Control Accuracy and Stability
All
B
e
li
mo actuators
h
ave
b
u
il
t-
i
n
brushless D
C
motors which provide
better accuracy and lon
g
er service life.
B
elimo non-spring return actuators are designed with a unique non
-
s
ymmetrical deadband. The actuator follows an increasing or decreasing
c
ontrol signal with a 75 mV resolution. If the signal changes in the opposite
d
irection, the actuator will not respond until the control signal changes by
1
75 mV. This allows these actuators to track even the slightest deviation very
a
ccurately, yet allowing the actuator to “wait”
f
or a much larger change in
c
ontro
l
s
i
gna
l
d
ue to contro
l
s
i
gna
l
i
nsta
bili
ty.
Satisfied
Control Position
Minimum
Control Resolution
75 mV
Actuator responds to a 75 mV signal when
not changing direction from stop position.
Satisfied
Control Position
Minimum Reversed
Control Deadband
Prior to Normal Control
175 m
V
Actuator responds to a 175 mV signal when
reversing direction from stop position.