Specification of Printed Armature DC Servo Motors

Models of Printed Armature DC Servo Motors are available in B series and BR series. Models with rated torque in the range of 34 Ncm to 1432 Ncm. Rated speed of 3000 RPM. Some of these models are manufactured with inbuilt tachogenerator.

Performance figures

MOTOR
RATINGS
(1&2)
SYMBOL UNIT B9M4 B12M4 B12M4H B9M4T* B12M4T* B12M4HT* BR13MACH BR17MACH BR19MACH BR19MAHR B23MACH BR24MACH BR27MACH

Rated Torque

To Nom 34 85 112 30 80 97 120 190 320 320 700 960 1432
Rated Speed N RPM 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000
Rated Output (3) W Watts 106 268 350 94 250 305 380 600 1000 1000 2200 3000 4500
Rated Voltage V Volts 24.1 43.4 63.5 22.9 40.4 56.5 65 105 83 164 172 140 150
Rated Current I Amps 8.71 8.8 8 8.63 8.7 8 8 7.3 14.4 7.2 14.8 25 32.8
Max. Current at very low speed ICC Amps 6.81 8.13 8.1 6.81 8.13 8.1 6.5 7.1 16.5 8.5 11 20 37.5
Peak Torque (4) Tp Nom 306 861 1380 283 843 1208 850 1400 2440 2440 5000 8400 11500
Peak Current (4) Ip Amps 72 84.5 84.5 72 84.5 84.5 50 48.7 101.4 50.1 100 200 251
Max speed with No external load Nmax RPM 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 5000 4000 4000
MOTOR
Constants
                             

Back EMF Constant

Ke Volts/KRPM 4.85 11.55 15.82 4.5 10.6 13.82 16.5 30 25 51 53 43 48.3
Torque Constant Kt Ncm/Amps 4.72 11.25 15.01 4.37 10.39 13.55 15.8 23.4 23.9 48.8 50.6 41.2 46.1
Damping Constant Kd Ncm/KRPM 0.94 2.2 3.8 0.94 2.2 3.8 1.5 8 8 8 13 12.5 20
Friction Torque Tf Ncm 3.13 4.3 5 3.2 4.3 5 2.6 10 10 10 12 15 20
Terminal Resistance Rt Ohms 0.85 0.75 0.75 0.85 0.75 0.75 1.5 1.6 0.46 1.6 0.9 0.285 0.18
Armature Inductance La Micro-H <100 <100 <100 <100 <100 <100 <80 <400 <100 <400 <250 <100 <100
Moment of Inertia Jm gm-cm2 395 1342 1480 586 1837 1910 2350 10000 10000 10000 23000 32000 74000
Mech. Time Constant Tm Milli–sec 11.97 6.68 2.88 20.52 10.84 4.82 12 6.5 7.4 6.5 8 5.1 6
Ele. Time Constant Te Micro–sec <150 <160 <160 <150 <160 <160 <55 <250 <217.4 <250 <240 <350 <555.6
Motor Diameter D mm 115 145 145 115 145 145 170 200 226 226 270 290 300
Motor Length(Excl Shaft) L mm 55 55 70 57 57 72 126 120 137 137 147 168 375
Weight Wt. Kg 2.3 3.6 5 2.3 3.6 5 5.5 12 12 12 21 25 38
Tachogenrator Characteristics Units Tacho Tacho Tacho B12T B9T
Peak acceleration with load can be calculated as :
PEAK TORQUE–LOAD FRICTION
JM + REFLECTED LOAD INERTIA
     
The Operating current can be calculated as :
(SHAFT TORQUE + Tf +Kd x
SPEED
)/Kt
1000
     
The Operating Voltage can be calculated as :
Ke x
Speed
  + Rt x OP. Current
1000
     
Output Voltage Volts/100 RPM 2.25 5.3 6.4 6 3
Ripple Content (Max.) % 3.5 3.5 3.5 3 3
Linearity of Output Voltage (Ref. 3600 RPM) % 0.11 0.11 0.11 0.05 0.05
By directional Tolerance % 1 1 1.5 1.5 1.5
Temp. Coe. of Voltage % per Deg. C -0.02 -0.02 -0.02 0.02 0.02
Minimum Load Resistance Recommended Ohms 370 494 494 1000 1000

 

  1. Mounting on metal plate with thermal insulation (200 x 200 x 10mm) and pure DC Supply, ambient temperature, 0 deg C to 40 deg C, for motors up to 300 Watts
  2. Mounting on metal plate with termal insulation (400 x 400 x 10mm) and pure DC supply, ambient temperature, 0 deg C to 40 deg C for motors above 300 Walts
  3. Motors normally used in a large variable speed range. Extended duty at rated output not recommended.
  4. Allowed cycle S3 - 50ms, 1%
  5. * This motor is having inbuilt Tachogenrator.