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Space-Qualified Electro-Magnetic Actuators
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ATA designs, produces and tests custom
space-qualified electromagnetic actuators for high performance
steering mirrors and other similar applications. The ACT-032-044 is the
highest force, fully-redundant linear EM actuator available on the
market today. It is vacuum compatible and designed to exceed 1kHz
bandwidth with minimum phase loss. |
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Representative Performance Data For Each Redundant Coil Winding
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PARAMETER |
SYMBOL |
VALUE |
UNIT |
ELECTRICAL
(per redundant coil, A or B)
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Force Constant |
KF |
2.25 (10.0) |
lbF /Amp (N/Amp)
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Motor Constant |
KA |
0.6 (2.7) |
lbF/W½
(N/W½) |
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Nominal Force |
FNOM |
2.25 (10.0) |
lbF (N)
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Voltage @ Nominal Force
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VNOM |
15.0 |
VDC |
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Current @ Nominal Force
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INOM
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1.0 |
Amp |
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Power @ Nominal Force
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PNOM |
15.0 |
Watt |
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Peak l Force (20% duty cycle)
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FP |
11.3 (50) |
lbF (N)
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DC Winding Resistance
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RC |
15.0 |
W |
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Back EMF Constant
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KB |
0.30 (11.8) |
V/in/s (V/m/s) |
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Inductance |
LC |
2.7 |
mH |
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Electrical Time Constant
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tCOIL |
1.1 |
msec |
MECHANICAL
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Nominal Actuator Length
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INOM |
1.72 (43.7) |
In(mm) |
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Actuator Diameter
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fMAX |
1.25 (31.8) |
In (mm) |
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Coil Weight |
mCOIL |
0.09 (40.9) |
lbm (gm)
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Magnet Assembly |
mMAG
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0.30 (136.3)
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lbm (gm)
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Actuator Total Weight
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mACT
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0.39 (177.2)
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lbm (gm)
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Clearance Each Side of Coil
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0.028 (0.71)
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in (mm) |
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Stroke |
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± 0.03 (0.76) |
in (mm) |
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Thermal Resistance of Coil
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qC |
<5.0 |
°C/W |
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