E37 : E-Series BLDC Motor

Size: 3.7 inches or 9.4 cm
Peak Torque: to 725 oz-in or 512 Ncm



High-Performance. High Torque-to-Weight.
The E37 series offers high output in a highly efficient package for mid to low voltage, mid-level to high torque applications. This series features an economic design available in both closed and open shell configurations. The E37 series supports application speeds up to 7,500 RPM while providing long reliable performance.

E37 Speed / Torque Curves

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E37 Mechanical / Winding Data

Stack Size Models E37 - 65 E37 - 120 E37 - 161
Continuous Stall Torque (oz-in) 65 120 164
Continuous Stall Torque (Ncm) 45.90 84.73 115.80
Peak Torque (oz-in) 245 475 725
Peak Torque (Ncm) 172.99 335.40 511.92
Motor Constant (oz-in / Watt) 15.80 27.20 32.50
Electrical Constant (msec) 1.60 2.35 1.94
Mechanical Constant (msec) 9.62 5.72 6.02
Rotor Inertia (oz-in-sec2) 0.0170 0.0310 0.0450
Rotor Inertia (gm-cm2) 1200.5 2189.2 3177.9
Thermal Resistance (C / Watts) 2.1 1.7 1.5
Weight (oz) 78.4 118.4 158.4
Weight (Kg) 2.2 3.4 4.5
Length (inches) 4.6 5.6 6.6
Length (cm) 11.7 14.2 16.8
Number of Poles 4 4 4

Winding Models 65V48 65V60 65V160 120V48 120V60 120V160 161V48 161V60 161V160
Design Voltage
(VDC)		 48 60 160 48 60 160 48 60 160
Continuous Current
(Amps)		 6.0 5.3 2.1 9.4 8.4 4.0 8.7 8.7 4.5
Peak Current
(Amps)		 17.4 15.2 6.1 28.7 24.4 11.9 31.4 31.4 15.7
Voltage Constant
±10%
(VDC/kRPM)		 11.6 13.2 33.2 13.6 16.0 32.8 19.0 19.0 38.0
Torque Constant
±10%
(oz-in / Amp)		 15.7 17.9 44.9 18.4 21.6 44.4 25.7 25.7 51.4
Torque Constant
±10%
(Ncm / Amp)		 11.087 12.640 31.706 12.993 15.253 31.353 18.148 18.148 36.296
Resistance
±10%
(Ohms)		 1.0 1.3 8.3 0.5 0.6 2.7 0.7 0.7 2.4
Inductance
±10%
(mH)		 1.6 2.0 12.9 0.8 1.2 4.9 1.2 1.2 4.8

E37 Outline Drawing

e37e37

E37 Commutation Sequence

hall diagram