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Fluid Dynamic Bearing (FDB) Brushless 3-Phase Motor

The new FDB BLDC motor combines the advantages of a BLDC (brushless DC) motor with the cutting edge technology of our FDB (Fluid Dynamic Bearing).


  • Extremely quiet running and high running accuracy
  • High rotational speed, up to 15,000 rpm
  • Low vibration
  • Low run out (NRRO below 40nm)
  • Wobble error < 3′
  • Low acoustic noise level
  • Long working life due to lack of mechanical wear
  • Low electric power consumption


  • Hard Disk Drives
  • Virtual Reality – motion tracking
  • LiDAR
  • 2D and 3D Scanner
  • Cooling Fans
  • DLP Projector
  • Respiratory Equipment

About our FDB Brushless Dynamic Motor

A BLDC motor is brushless, where the commutation is done electronically. There is no need for brushes, as the torque is a function of the electronic action of the brushless motor on the commutator. This means that a brushless motor has fewer parts that can wear out, and there is never any need to be concerned about the condition of the brushes. A BLDC motor is longer lasting and more reliable than their brushed counterparts. It is a very effective motor with an optimized electromagnetic design for noise, vibration and jitter, built for the long-term.
The fluid dynamic bearing designed into this motor was originally developed to satisfy the ultra-precise mechanical requirements and expected long working life of the hard disk drive market. Now, used in our 3-phase brushless DC motor, this same bearing eliminates the limited precision of a ball bearing, minimizing the non-repeatable run out, lowering acoustic noise level and improving reliability. This hydrodynamic bearing system is the right choice for your high precision applications.

Application Examples

Measurement Technology

With its wide temperature range, the BLDC FDB SP2B motor is ideally suited for indoor and outdoor applications. The FDB technology provides high density and accuracy. The small size and the high stiffness both fit perfectly when it comes to mobile application usage. Thanks to the combination of a brushless DC motor with the cutting-edge technology of fluid dynamic bearing, high running and scanning precision are guaranteed.



Safety Technology

High accuracy, low vibration, a wide field of vision as well as high axial and radial stiffness are only a few of the numerous virtues of our FDB motor in the area of safety technology. The motor allows high density and a wide viewing angle. Thanks to the compact design also smaller constructions in this application area are possible. The fluid dynamic bearing comes without the limited precision of ball bearings and minimizes the non-repeatable run out to optimize the steadiness.

fluid dynamic bearingConsumer Electronics

The BLDC FDB SP2B motor provides the link to the real world. Due to its extremely quiet running and accuracy, the level of noise is minimized. Furthermore, the FDB motor allows a high density and turns virtual content into reality. The fluid dynamic bearing fulfills the high precision standards in consumer electronics. Since there are no wear parts, a long service life is guaranteed.

The fluid dynamic bearing in consumer electronics

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