Surgical power tool motor

for surgical equipmentfor medical equipmentmedical industry

Overview
Mirmex's technology replaces traditional wire-based windings to enable novel radial flux BLDC micromotors with printed, slotless winding topologies. These micromotors deliver zero-cogging, superior performance density, enhanced thermal behaviour and broad design freedom for custom diameters, lengths, speeds and voltages.

Key capabilities

• Zero-cogging for smooth, linear driveability.
• Unique printed winding topologies unachievable with conventional wire winding methods.
• Superior copper fill-factor for improved performance within a given volume.
• Thermally optimized designs to reduce losses and extend continuous operation.
• Autoclavable designs suitable for repeated sterilization cycles and harsh environments.

Performance ranges
Diameter: 1.5 - 85 [mm]
Length: 2 - 120 [mm]
Power (up to): 1000 [W]
Torque (up to): 500 [mNm]
Speed (up to): 120000 [rpm]

Benefits

• More compact and lighter — up to 50% smaller than comparable solutions at equal performance.
• Best performance density thanks to higher copper fill-factor.
• Custom-made: full design freedom for diameter, length, speed, voltage and topology.
• Easy prototyping — significantly faster prototype manufacturing.
• Consistent performances and high repeatability down to each copper fiber.
• Better thermal behaviour: ability to balance losses (thermal, Eddy) to significantly reduce thermal losses.
• More sustainable: reduced raw material usage (up to less than 45% raw materials required) and optimized energy usage.

Application examples & key features
Medical Power Tools Motorization
Typical example: Diameter: 18.5 mm; Length: 37 mm; Speed: 80,000 rpm; Power: 75 W; Torque: 10 mNm; Efficiency: 93%
Key features:

• Thermally optimized for longer running time before overheating.
• More compact and lighter — easier integration in hand pieces.
• Higher torque for demanding bone surgeries.

Space Equipment Actuators
Typical example: Diameter: 20 mm; Length: 32 mm; Speed: 10,000 rpm; Power: 100 W; Torque: 100 mNm
Key features:

• High torque for safe operation and simplified gearboxes.
• Lighter designs to reduce overall equipment weight.
• Robustness and precision for improved longevity and effectiveness.

Cobot Actuator
Typical example: Diameter: 43 mm; Length: 30 mm; Speed: 1,500 rpm; Power: 30 W; Torque: 190 mNm
Key features:

• More dynamic and responsive, improving takt-time.
• Smaller motor size for easier integration in compact equipment.
• Zero cogging and linear driveability for movement precision.

Manufacturing & development advantages

• Scope & modeling, rapid prototyping, testing & fine tuning, then mass production flow supported.
• Prototyping is faster and more affordable compared to conventional approaches (noted as up to 10x faster prototype manufacturing).

Caractéristiques / spécifications techniques

• Product family: Radial Flux BLDC Micromotors (custom-made)
• Diameter range: 1.5 – 85 mm
• Length range: 2 – 120 mm
• Maximum power: up to 1000 W
• Maximum torque: up to 500 mNm
• Maximum speed: up to 120,000 rpm
• Example — Medical power tool motor: 18.5 mm Ø; 37 mm L; 80,000 rpm; 75 W; 10 mNm; 93% efficiency
• Example — Space actuator: 20 mm Ø; 32 mm L; 10,000 rpm; 100 W; 100 mNm
• Example — Cobot actuator: 43 mm Ø; 30 mm L; 1,500 rpm; 30 W; 190 mNm
• Key design attributes: zero-cogging, printed slotless winding topologies, high copper fill-factor, thermally optimized, autoclavable