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45ECF Brushless DC Slotted Flat Motor with Outer Rotor


The 45ECF Brushless DC Flat Slotted Motor utilizes an outer rotor configuration with an overall body length of 22.5mm. This motor consists of a 16-pole magnetic circuit and is able to provide a torque output of up to 91 mNm. The open body design allows for better heat management. The 45ECF features a performance optimized design that delivers excellent high power density and smooth output torque in a compact package, making it a perfect fit for Aerospace & Defense applications, Robotics, and Surgical Robotics.

Product Highlights

  • 8 pole pairs magnetic circuit
  • Max continuous torque up to 91 mNm
  • Sensored or sensorless
  • 3-Phase BLDC

Customization Available

  • Connectors
  • Coil modifications - resistance and inductance
  • Custom shafts - flats, knurling, diameter, length
  • Gearheads for increased torque
  • Different optimization (speed or direction)
  • Without hall sensors
Part Number 45ECF22 8B 25
Motor Diameter (in) 1.7
Motor Diameter (mm) 43.2
Ambient Operating Temperature Range (°C) -30 to +100
Ambient Operating Temperature Range (°F) -22 to 212
Ambient Storage Temperature Range (°C) -40 to +100
Ambient Storage Temperature Range (°F) -40 to 212
Axial Static Force w/o Shaft Support, Max (lbs) 11.91
Axial Static Force w/o Shaft Support, Max (N) 53
Back EMF Constant (V/1000 rpm) 3.76
Ball Bearings Preload (N) 15
Continuous Current, Max (A) 2.5
Continuous Mechanical Power, Max (@25°C) (W) 50
Continuous Torque, Max (mNm) 91
Continuous Torque, Max (oz-in) 12.89
Electrical Time Constant (ms) 0.61
Housing Material Aluminium
Hall Sensor Electrical Phasing (electrical °) 120
Inductance - Phase to Phase (mH) 0.5
Internal Resistance - Phase to Phase (Ohm) 0.8
Line to Line Resistance (Ohm) 0.82
Mechanical Time Constant (ms) 8.6
Motor Constant (mNm/W½) 40.2
Motor Constant (oz-in/W½) 5.7
Motor Regulation (10³/Nms) 0.63
Motor Speed, Max (rpm) 10000
No-Load Current, Typical (mA) 230
No-Load Speed (rpm) 6310
Nominal Voltage (V) 24
Optimization Direction Symmetrical
Rotor Inertia (gcm²) 135
Rotor Inertia (oz-in-sec² 10ˉ⁶) 19.2
Thermal Resistance (Slotless) (°C/W) 10
Thermal Time Constant (s) 109
Torque Constant (mNm/A) 35.95
Torque Constant (oz-in/A) 5.09
Weight (g) 130
Weight (oz) 4.59
Winding Temperature, Max (°C) 125
Winding Temperature, Max (°F) 257
Length (in) 0.885
Length (mm) 22.5
Feedback Type Hall Sensors
Number of Poles 16 poles
Document Document Type Language File Type
pr_45ecf_brushless_flat_motor_en.pdf Press Release application/pdf
drawing_45ecf.dxf 2D Drawing application/octet-stream
drawing_45ecf.STEP 3D Drawing application/octet-stream
specifications_45ecf.pdf Specification Page application/pdf
brochure_45ecf_sell_sheet_en.pdf Brochure application/pdf