21BF nuvoDisc

21BF nuvoDisc Slotless Brushless DC Flat Motor

21BF nuvoDisc Slotless Brushless DC Flat Motor

21BF nuvoDisc

The 21BF nuvoDisc brushless DC slotless motor utilizes 6 self supporting ironless coils. The 21BF mini motor offers long life, excellent speed and position control and smooth rotation. Using a disc magnet design, it has no iron losses and a flat shape.

Product Highlights

  • With or without hall sensors
  • Slotless
  • 8 poles
  • Compact design
  • No iron losses
  • High efficiency
  • Flat design
  • 3 phases

Customization Available

  • Cable or terminal outputs
  • Coil modifications - resistance and inductance
  • Custom shafts - flats, knurling, diameter, length
  • Value added mounting

Applications

Part Number 21BF 3C K .02
Motor Diameter (in) 0.827
Motor Diameter (mm) 21
Ambient Operating Temperature Range (°C) -30 to +80
Ambient Operating Temperature Range (°F) -22 to +176
Ambient Storage Temperature Range (°C) -40 to +80
Ambient Storage Temperature Range (°F) -40 to +176
Axial Static Force w/o Shaft Support, Max (lbs) 6.0696
Axial Static Force w/o Shaft Support, Max (N) 27
Back EMF Constant (V/1000 rpm) 0.89
Ball Bearings Preload (N) 2.7
Continuous Current, Max (A) 0.3
Continuous Mechanical Power, Max (@25°C) (W) 4
Continuous Torque, Max (mNm) 2.7
Continuous Torque, Max (oz-in) 0.38
Electrical Time Constant (ms) 0.02
Housing Material Plastic
Hall Sensor Electrical Phasing (electrical °) n/a
Inductance - Phase to Phase (mH) 1.22
Internal Resistance - Phase to Phase (Ohm) 56.3
Line to Line Resistance (Ohm) 56.3
Mechanical Time Constant (ms) 141.2
Motor Constant (mNm/W½) 1.1
Motor Constant (oz-in/W½) 0.16
Motor Regulation (10³/Nms) 784
Motor Speed, Max (rpm) 25000
No-Load Current, Typical (mA) 28
No-Load Speed (rpm) 3900
Nominal Voltage (V) 5
Optimization Direction n/a
Rotor Inertia (gcm²) 1.8
Rotor Inertia (oz-in-sec² 10ˉ⁶) 25.49
Thermal Resistance (Slotless) (°C/W) 12
Thermal Time Constant (s) 200
Torque Constant (mNm/A) 8.5
Torque Constant (oz-in/A) 1.2
Weight (g) 10
Weight (oz) 0.35
Winding Temperature, Max (°C) 125
Winding Temperature, Max (°F) 257
Number of Poles 8 pole
Document Document Type Language File Type
21BF nuvoDisc Specification Page Specification Page
21BF nuvoDisc drawing 2D Drawing
21BF nuvoDisc 3D drawing 3D Drawing