Brush Type Manual - General Dynamics Global Imaging Technologies

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3375V-095
Brush DC Motors
77°9'
RED
.120 MAX.
.760
.065
MTG DIM
+.001
2.125 -.000
+.000
3.375 -.001
2.250 MIN.
2 PL
BLACK
1.
2.
.096 THRU C'SK 82°
x .175 MIN 4 PL.
AS SHOWN ON 3.175 B.C.
.950
.690
Size Constants:
(all values at 25° C ambient temperature)
Units Symbol Value
Peak Torque, stalled @Vp: oz-in Tp 300
Power I 2 R @Tp: watts P 177
Continuous Stall Torque oz-in Tcs 55.7
Motor Constant oz-in/ W Km 22.55
Electrical Time Constant ms Te 0.38
Mechanical Time Constant ms Tm 9.75
Damping Factor (zero impedance) oz-in/(rad/sec) Fo 3.589
Break Away Torque oz-in Tf 6.5
Rotor Inertia oz-in-sec 2 Jm 0.035
Theoretical Acceleration @ Tp rad/sec 2 t 8571
Ripple Frequency cycles/rev f R 55
Ripple Torque % (ave to peak) T R 7
Theoretical No Load Speed @ Tp rad/sec NLT 79.2
Weight oz WT 16.3
Maximum Allowable Temperature °C (at winding) Temp. 155
Thermal Resistence °C/W tpr 7.4
Winding Constants
(all values at 25° C ambient temperature)
Units TOL. Symbol -012 -045 -090
Resistance ohms +/-12.5% R 1.21 4.42 9.47
Inductance mH +/-30% L 0.46 1.68 3.60
Torque Sensitivity oz-in/A +/-10% Kt 24.8 47.4 69.3
Back EMF Constant: V/(rad/sec) +/-10% Kb 0.175 0.335 0.489
Peak Voltage @ Tp Volts Nominal Vp 14.6 28 41.0
Peak Current @ Tp Amps Nominal Ip 12.1 6.33 4.33
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NOTES:
1. LEADS: #22 AWG TYPE
"ET" TEFLON COATED
PER MIL-W-16878, 12
INCHES MINIMUM
LENGTH.
2. MOTOR TO ROTATE CW
VIEWED FROM BRUSH
END WITH POSITIVE
VOLTAGE APPLIED TO
RED LEADWIRE WITH
RESPECT TO THE
BLACK.
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Brush Type DC Motors
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