BN23 Brushless DC Motors With Integral Drives

Silencer® Series

BN 23 Brushless DC Motors with Integral Drives

Silencer® brushless DC motors with integral drives provide smooth, quiet and efficient operation over a wide speed range. Each frame size is available in several different lengths, with the electronics optimized for the specific motor’s operating parameters. Moog has already performed motor / drive system integration, mechanically, electrically and thermally and offers off-the-shelf models for a wide variety of applications.

Utilizing bonded neo magnets and Surface Mount Technology (SMT), the BN series motors provide excellent value with their low-cost and high torque. The compact BN motors are well suited for applications demanding low audible noise, long life and ease of installation.

If you have any questions about the Silencer BN motors and drives, or would like to speak with an application engineer, please contact us.


  • Integral two quadrant speed controllers for electronically commutating three-phase brushless motors
  • Uses built-in Hall effect sensors for rotor position feedback
  • All motor, drive and feedback connections are pre-wired internally to the package
  • Motor speed is controlled by an external 0 - 5 VDC command voltage
  • Direction of rotation is set by the direction input control
  • Maximum current limit has been pre-set to protect motor and drive
  • Controller is protected against thermal overload by means of an internal thermal cutoff (BN23)
  • Efficient PWM speed control using power MOSFET technology
  • Compact size – lengths from 2.4 to 4.3 inches
  • Diameter – 1.2 inches and 2.25 inches
  • Torque ratings from 1.7 oz-in to 22.0 oz-in
  • Operating temperature range -10 to 45° C


  • Compact packaging minimizes space required
  • Matched motors and drives from a single supplier
  • Integrated electronics simplifies installation and wiring
  • Complete system testing insures high reliability
  • High performance, low cost speed controller
  • Motor life not limited to brush and commutator life
  • Extremely quiet operation
  • Low emitted EMI
  • Efficient operation
  • Long life

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Typical Applications

  • Medical equipment - pumps, blowers and centrifuges
  • HVAC and other air handling equipment
  • Packaging and printing equipment
  • Semiconductor handling and insertion machines
  • Robotic tape storage and retrieval
  • Industrial automation equipment
  • Office automation equipment
  • Actuators