25mmFrameless Motor

The modular design of the stator and rotor in the 25mm frameless motor, along with optimized slot ratios, improves the motor's torque density.

The rotor has a large inner bore space, and the stator is designed for embedded installation by the customer, facilitating personalized design including mounting structures and cooling systems, offering greater flexibility for custom systems.

The optimized slot-pole combination reduces motor cogging torque, ensuring smooth motor operation.

The structure is compact and highly integrated.

25mm Frameless Motor images

Motor Characteristics

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Motor part number - 25ZWC10X-1
Stator outer diameter mm 25 (±0.016)
Rotor inner diameter mm 11.6 (+0.018)
Number of slots - 12
Pole pairs - 7
Phase-to-phase resistance Ω 0.42
Phase-to-phase inductance mH 0.123
Winding connection method - Star connection
Insulation class - F
Duty type - S2
Feedback method - /
Commutation angle - 120°
Insulation strength (Withstand voltage) - 600VAC/1s/3mA
Insulation resistance - 50MΩ/500VDC
Stator weight g 20
Rotor weight g 3.2
No-load speed RPM 26000
No-load current A 0.65(REF)
Rated voltage VDC 24
Rated power W 70
Rated torque N·m 0.032
Rated speed RPM 22650
Rated current A 3.8
Torque constant Nm/A 0.009
Back-EMF constant (effective value) Vrms/Krpm 0.65
Peak torque N·m 0.105
Peak current A 13
Inertia moment g·cm² 1.47

Dimensional Drawings

Frameless Motor 25mm images
Frameless Motor Size 25mm Dimensional Drawing

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Lead-out type Lead-out color Function
UL1332 AWG20 Yellow U phase
Red V phase
Black W phase

Torque Performance Curves

Torque Performance Curves image