DP20 Brush Motor
DirectPower™ Series

Summary Details

Size: Nema 20
Peak Torque: to 72 oz-in or 50.8 Ncm

Good-Performance. Good Price.
Our ElectroCraft DirectPowerTM Nema 20 is a conventional brush-type permanent magnet DC motor. It provides torque up to 72 oz-in or 50.8 Ncm.

Additional Product Details

DP20 Outline Drawing

DP20 Speed / Torque Curves

torque_dp20-10.gif torque_dp20-15.gif torque_dp20-20.gif

DP20 Mechanical / Winding Data

DP20 Stack/Torque Sizes
Imperial DP20-10 DP20-15 DP20-20
Metric DP20M-07 DP20M-11 DP20M-14
Continuous Stall Torque¹ (oz-in) 10 15 20
Continuous Stall Torque¹ (Ncm) 7.06 10.59 14.12
Peak Torque² (oz-in) 53 63 72
Peak Torque² (Ncm) 37.42 44.48 50.84
Rotor Inertia (oz-in-sec2) 0.0017 0.0025 0.0029
Rotor Inertia (g-cm2) 120.1 176.6 204.8
Weight (oz) 32.0 35.2 36.8
Weight (Kg) 0.90 0.99 1.00
Length³ (inches) 3.98 4.633 4.633
Length³ (mm) 101.0 117.6 117.6
Number of Poles 2 2 2

DP20 Winding Options
Imperial 10V12 10V24 15V12 15V24 20V12 20V24
Metric 07V12 07V24 11V12 11V24 14V12 14V24
Design Voltage
(VDC)
12 24 12 24 12 24
Continuous Current¹
(Amps)
3.80 1.85 4.00 1.95 4.25 2.1
Peak Current²
(Amps)
11.5 5.7 13.5 6.7 11.5 2.7
Voltage Constant
±10%
(VDC/kRPM)
3.70 7.40 4.00 7.00 4.65 9.30
Torque Constant
±10%
(oz-in / Amp)
5.00 10.00 4.70 9.50 6.00 13.00
Torque Constant
±10%
(Ncm / Amp)
3.531 7.062 3.319 6.708 4.237 9.180
Resistance
±10%
(Ohms)
0.70 3.05 0.60 3.05 0.70 3.05
Inductance
±10%
(mH)
1.10 2.97 0.49 1.35 1.08 4.86
Motor Constant
(oz-in / √ Watt)
5.976 5.726 6.068 5.440 7.171 7.444
Motor Constant
(Nm / √ Watt)
4.220 4.043 4.285 3.841 5.064 5.256
Electrical Constant
(msec)
1.57 0.97 0.82 0.44 1.54 1.59
Mechanical Constant
(msec)
6.75 7.35 9.61 11.99 7.97 7.41
Thermal Resistance
(C / Watts)
6.3 6.3 5.8 5.8 4.9 4.9

NOTES:

¹ Continuous rating based on 25°C ambient temperature, winding temperature rise of 100°C and motor mounted to a 12x12x0.50 inch aluminum heatsink.
² 10 seconds at 25°C ambient, 100°C winding temperature.
³ Inductance bridge measurement method @ 1kHz.

DP20 View CAD

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