SP22ZWWC 22 mm Brushless Coreless DC Motor Series

Coreless DC Brushless Motor (General Industrial)
The SP22ZWWC 22 mm brushless coreless DC motor series covers 20 to 25 mN·m rated torque and 18,200 to 49,600 rpm rated speed, with Hall feedback and optional planetary gearing.
sp22zwwc 22mm brushless coreless dc motor

Technical details

Further information

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Positioning accuracy

High torsional rigidity and constant torsional backlash over the entire gearbox service life ensure consistently high performance

Compactness

High torque density thanks to high performance and short design

Low maintenance

Highest quality standards for a long service life and extended maintenance intervals

Technical data

22 mm brushless coreless DC motor

High-speed coreless performance across six verified configurations

The SP22ZWWC series combines a 22 mm slotless coreless structure with brushless electronic commutation. Low rotor inertia supports rapid response, while the available configurations cover 12 to 48 V rated operation.

22 mm

Compact cylindrical frame

The 22 mm format supports precision equipment with strict diameter and mass constraints.

49,600 rpm

High rated speed

Available configurations reach rated speeds up to 49,600 rpm for rapid miniature drive systems.

91%

Efficient brushless drive

Motor efficiency reaches up to 91% within the verified series configurations.

Engineering data

Electrical, mechanical and gearbox specifications

Select the winding and housing length for the required voltage, torque and speed operating point.

22 mmMotor size
12–48 VRated voltage
20–25 mN·mRated torque
18,200–49,600 rpmRated speed
Motor selection

SP22ZWWC series specifications

Parameter Unit 22ZWWC48 / 12 V 22ZWWC48 / 24 V 22ZWWC48 / 36 V 22ZWWC48 / 48 V 22ZWWC48 / 24 V (2 pole pairs) 22ZWWC64-1SZ / 24 V
Pole pairs — 1 1 1 1 2 1
Phase resistance Ω 0.26 0.3 0.57 1 0.94 0.63
Phase inductance mH 0.018 0.027 0.06 0.11 0.057 0.061
Winding connection — Star Star Star Star Star Star
Insulation class — B B B B B B
Duty cycle — S2 S2 S2 S2 S2 S2
Feedback — Hall elements Hall elements Hall elements Hall elements Hall elements Hall elements
Commutation angle — 120° 120° 120° 120° 120° 120°
Dielectric strength — 500 VAC / 1 kHz / 1 mA / 1 s 500 VAC / 1 kHz / 1 mA / 1 s 500 VAC / 1 kHz / 1 mA / 1 s 500 VAC / 1 kHz / 1 mA / 1 s 500 VAC / 1 kHz / 1 mA / 1 s 500 VAC / 1 kHz / 1 mA / 1 s
Insulation resistance — 100 MΩ / 500 VDC 100 MΩ / 500 VDC 100 MΩ / 500 VDC 100 MΩ / 500 VDC 100 MΩ / 500 VDC 100 MΩ / 500 VDC
Weight g 110 110 110 110 110 140
Rated voltage V 12 24 36 48 24 24
Rated power W 83 100 100 100 53 38.24
Rated torque mN·m 20 20 20 20 25 20
Rated speed rpm 40,000 49,000 47,400 49,600 20,100 18,200
Rated current A 7.95 4.68 3.12 2.29 3 1.86
No-load speed rpm 50,000 55,000 53,000 54,000 25,700 19,300
No-load current A 0.3 0.4 0.32 0.14 0.18 0.126
Motor efficiency % 87 89 89 91 81 89.7
Noise, ambient 20 dB at 1 m dB <50 <50 <50 <50 <50 <50
Housing-to-ambient thermal resistance, no load K/W 0.38 0.58 0.51 0.42 1.12 —
Motor thermal time constant, no load s 840 600 900 1,200 620 —
Ambient temperature °C 21.4 22 24.7 21.1 23.3 22.3
Maximum winding temperature, no load °C 52.7 80 75.5 70.5 82 —
Torque constant mN·m/A 2.52 4.27 6.41 8.74 8.33 11.87
Back-EMF constant, peak V/Krpm 0.37 0.63 0.95 1.29 1.23 1.758
Back-EMF constant, effective V/Krpm 0.26 0.45 0.67 0.91 0.87 1.24
Peak torque mN·m 116.11 341.76 404.72 419.33 212.77 320
Peak current A 46 80 63 48 26 33.5
Rotor inertia g·cm² 1.15 1.15 1.15 1.15 1.15 3
Mechanical time constant ms 4.72 1.89 1.60 1.51 1.56 1.34
End cap — Stainless steel Stainless steel Stainless steel Stainless steel Stainless steel Stainless steel
Bearing — Deep-groove ball bearing Deep-groove ball bearing Deep-groove ball bearing Deep-groove ball bearing Deep-groove ball bearing Deep-groove ball bearing
Magnet — Sintered NdFeB Sintered NdFeB Sintered NdFeB Sintered NdFeB Sintered NdFeB Sintered NdFeB
Shaft — Carbon steel Carbon steel Carbon steel Carbon steel Carbon steel Carbon steel
Optional accessory

Precision planetary gearbox selection data

Parameter Unit 1 stage 2 stages 3 stages 4 stages
Reduction ratio X:1 3.9, 5.3 16, 21, 28 62, 83, 111, 150 243, 326, 439, 590, 794
Backlash ° 0.85 1.05 1.2 1.35
Maximum continuous output power W 24 12 6 1.6
Maximum intermittent output power W 30 15 7.5 2
Maximum continuous input speed rpm 8,000 10,000 10,000 10,000
Maximum intermittent input speed rpm 10,000 12,500 12,500 12,500
Maximum continuous torque N·m 0.5 0.7 1.2 1.5
Maximum intermittent torque N·m 0.6 0.9 1.5 1.9
Maximum efficiency % 90 81 74 66
Gearbox reference weight g 59 83 97 112
Gearbox length L mm 22.3 33 39.6 46.3
Technical drawings

Dimensions and performance characteristics

SP22ZWWC 22 mm brushless coreless DC motor dimensions
Motor dimensions, mounting interfaces, shaft geometry and lead arrangement.
SP22ZWWC optional planetary gearbox dimensions
Optional precision planetary gearbox dimensions and mounting interface.
SP22ZWWC 48 V motor performance curve
48 V two-pole-pair configuration efficiency, current, output power and speed characteristics over torque.
SP22ZWWC 36 V motor performance curve
36 V configuration efficiency, current, output power and speed characteristics over torque.
SP22ZWWC64-1SZ 24 V motor performance curve
22ZWWC64-1SZ 24 V efficiency, current, output power and speed characteristics over torque.
Compact motion

Slotless construction for smooth high-speed response

The coreless magnetic circuit avoids slot-related reluctance variation and reduces pulsation losses. Electronic commutation and low rotor inertia support smooth starts, rapid speed changes and low electrical noise.

  • Six verified voltage and winding configurations
  • Hall-element feedback with 120-degree commutation
  • Optional one- to four-stage precision planetary gearing
SP22ZWWC 22 mm brushless coreless DC motor
Application areas

Compact systems requiring fast and precise motion

01

Medical pumps

Compact fluid-handling mechanisms requiring responsive and efficient drive power.

02

Surgical instruments

Precision mechanisms where diameter, weight and low electrical noise are critical.

03

Smart-home mechanisms

High-speed compact actuation for connected appliances and automated devices.

04

Miniature servo systems

Fast follow-up motion in compact instruments, robotics and positioning assemblies.

Integration data

Selection and installation information

Confirm the winding, voltage, operating point, duty cycle, controller, thermal environment and gearbox ratio before final configuration.

SeriesSP22ZWWC
Frame diameter22 mm
Rated voltage range12–48 VDC
Rated operating range20–25 mN·m at 18,200–49,600 rpm
DutyS2
FeedbackHall elements
Winding connectionStar
Optional gearbox1–4 stage planetary gearbox

Discuss your 22 mm drive requirements

Share the required speed, torque, duty cycle, voltage, controller and installation constraints for configuration support.

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SP22ZWWC 22 mm Brushless Coreless DC Motor Series
The SP22ZWWC 22 mm brushless coreless DC motor series covers 20 to 25 mN·m rated torque and 18,200 to 49,600 rpm rated speed, with Hall feedback and optional planetary gearing.

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