Nanotec Electronic U.S. Inc. unveiles its new product line of slotless BLDC motors. Two models in NEMA 6 (16mm) and NEMA 11 (28mm) sizes represent the start. Slotless BLDC motors are ideal for high-speed applications in different areas, i.e. medical equipment.
The term "slotted" refers to the fact that the majority of BLDC motors have pole shoes/grooves that are called the iron core inside the winding on the inside of the stator. In contrast to this, a slotless or iron-free BLDC motor has only ring-shaped plates as the stator. A flat, glued or cast winding is applied to these.
Nanotec's new slotless BLDC motors offer higher speeds as compared to standard BLDC motors. Since there is no iron core, the inductivity of the motor is very low and the current increases very quickly in the windings. In addition, there are no iron losses, the motors are more efficient. In slow operation, the lacking torque ripple has a positive effect. Since the magnetic field is not reinforced on the pole shoes as with standard BLDC motors, there is no cogging torque. The motor also turns very evenly at slow speeds.
The DS16 slotless BLDC motor offers an output of 24 Watts at 25,000 rpm, the speed of the DS28 model is 14,000 rpm at 75 Watts.