50mmFrameless Motor

The modular design of the stator and rotor in the 50mm 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.

50mm Frameless Motor images

Motor Characteristics

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Motor part number - 50ZWC15X-1 50ZWC25X-1
Stator outer diameter mm 50±0.031 50±0.031
Rotor inner diameter mm 30+0.033 30+0.033
Overall length (L) mm 13.2 19.5
Stack length (L1) mm 8.9 15.2
Number of slots - 18 18
Pole pairs - 10 10
Phase-to-phase resistance Ω 0.62 0.6
Phase-to-phase inductance mH 0.44 0.45
Winding connection method - Star connection Star connection
Insulation class - F F
Duty type - S2 S2
Feedback method - Hall sensor Hall sensor
Commutation angle - 120° 120°
Insulation strength (Withstand voltage) - 500VAC/1mA/1s 500VAC/1mA/1s
Insulation resistance - 100 MΩ/500VDC 100 MΩ/500VDC
Stator weight g 77.5 124
Rotor weight g 38 50
No-load speed RPM 6400 5000
No-load current A 0.4(REF) 1.1(REF)
Rated voltage VCD 48 48
Rated power W 168 219
Rated torque N·m 0.3 0.51
Rated speed RPM 5350 4100
Rated current A 4.4 5.65
Torque constant Nm/A 0.074 0.092
Back-EMF constant (effective value) Vrms/Krpm 5.5 6.8
Peak torque N·m 0.96 1.5
Peak current A 10.7 16.1
Inertia moment g·cm² 100 135

Dimensional Drawing

Frameless Motor 50mm images
Frameless Motor Size 50mm 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