Brush Type Manual - General Dynamics Global Imaging Technologies

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3000V-053
Brush DC Motors
RED
.110 MAX.
.325
.065
MTG DIM
1.750
+.001
-.000
3.000
+.000
-.001
1.850 MIN.
2 PL
2.
1.
BLACK
.096 THRU
C'SK 82° x .175 4 HOLES
EQ. SP. ON 2.800 B.C.
.530
.250
Size Constants:
(all values at 25° C ambient temperature)
Units Symbol Value
Peak Torque, stalled @Vp: oz-in Tp 75
Power I 2 R @Tp: watts P 89
Continuous Stall Torque oz-in Tcs 15.6
Motor Constant oz-in/ W Km 7.94
Electrical Time Constant ms Te 0.32
Mechanical Time Constant ms Tm 22.47
Damping Factor (zero impedance) oz-in/(rad/sec) Fo 0.445
Break Away Torque oz-in Tf 2.5
Rotor Inertia oz-in-sec 2 Jm 0.01
Theoretical Acceleration @ Tp rad/sec 2 t 7500
Ripple Frequency cycles/rev f R 49
Ripple Torque % (ave to peak) T R 7
Theoretical No Load Speed @ Tp rad/sec NLT 159.6
Weight oz WT 6.5
Maximum Allowable Temperature °C (at winding) Temp. 155
Thermal Resistence °C/W tpr 13.5
Winding Constants
(all values at 25° C ambient temperature)
Units TOL. Symbol -012 -045 -105
Resistance ohms +/-12.5% R 1.34 4.86 11.4
Inductance mH +/-30% L 0.43 1.57 3.67
Torque Sensitivity oz-in/A +/-10% Kt 9.19 17.5 26.8
Back EMF Constant: V/(rad/sec) +/-10% Kb 0.065 0.124 0.189
Peak Voltage @ Tp Volts Nominal Vp 10.9 20.8 31.9
Peak Current @ Tp Amps Nominal Ip 8.16 4.29 2.80
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NOTES:
1. LEADS: #24 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
N