Slotless DC Brushless Motors
Precision Brushless DC Slotless Motors
Motion Control Products has introduced a new range of precision slotless DC brushless motors. These offer several advantages over conventional DC motors, including longer life expectancy, lightweight design, and reduced vibration and noise. Additionally, they exhibit minimal cogging even at very low speeds.
Slotless motors are engineered for smoothness and predictable torque output. By placing only copper phase coils in the motor's air gap, they interact with permanent magnetic flux to generate force or torque. This design eliminates cogging torque by removing discontinuous iron teeth from the motor air gap. Slotless technology is especially effective for direct drive precision systems, as torque is solely a function of phase current, minimising unwanted torque disturbances.
Features
- No cogging due to non-slot structure
- High-speed and high efficiency (90%)
- High durability, low noise
- Frame size: 10mm, 16mm, 22mm, 28mm, 36mm, 42mm
- 5,000 - 50,000 RPM rated speed
- Rated power: 35 - 160W with peak torque up to 1.46Nm
- Hollow shaft and Lead / ball screw integrated actuators
- Optional planetary gearboxes with various gear ratio
- Hall sensor or incremental encoder options
- Customisation is available upon request
Motion Control Products offer these slotless motors from 10mm diameter up to 42mm. Our Range of Slotless motors are also available with inline planetary gearboxes, and a variety of encoder and Brake options.
Applications that benefit from the advantages of Slotless technology include:
- Medical Equipment
- Dialysis Peristaltic and Gear Pumps
- Centrifugal Blowers
- Card Readers
- Ticket Printers/Dispensers
- CCTV and Pan and Tilt Applications
- Direct Drive Application
MOTOR TECHNOLOGY OVERVEIW
What is Slot-less BLDC Motor?
In contrast to traditional slotted BLDC motors, slot-less BLDC motors take a different approach in the motor design: Instead of winding copper wire through lamination slots, it is wound into a cylindrical shape, offering enhanced protection and rigidity. This “slot-less” configuration overcomes the problems of air gap magnetic induction pulsating issues. This phenomenon is typically caused by irregular magnetic resistance in toothed motors, resulting in undesirable vibrations and inefficiencies.
In a slot-less BLDC motor, copper wire is wound into a cylindrical shape and protected, rather than being wound through lamination slots as in conventional slotted BLDC motors. This design eliminates the need for a slotted stator lamination stack, ultimately reducing cogging, vibration, and noise. Additionally, the rotor can have a larger diameter, which therefore increases the torque.
The absence of teeth in a slot-less motor reduces winding inductance and decreases damping for faster motor response. This results in less electromagnetic interference, making slot less motors suitable for high-speed and fast acceleration and deceleration applications.
Benefits of Slotless BLDC Motors
- Cogging Elimination: The absence of stator teeth eradicates cogging, ensuring smoother operation in the application.
- Reduced Noise: Slot less BLDC motors operate quietly, thanks to low-loss lamination materials.
- Enhanced Efficiency: Reduced damping losses lead to improved efficiency.
- Faster Response: Lower winding inductance enables rapid dynamic responses.
- Vibration Minimisation: These motors experience minimal vibration, enhancing precision running.
- High-Speed Operation: Ideal for high-speed applications like drilling.
- Customisation: Easier winding customisation to suit specific customer needs.
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Please contact our technical sales team for pricing, datasheets, technical drawings (2D / 3D), hardware & software manuals or any other technical information for your applications...