Reluctance stepper motor, also known as variable‑reluctance stepper motor, is an open‑loop stepper driving component. Its toothed rotor is stacked by soft‑magnetic silicon steel sheets without permanent magnets. It generates stepping torque through magnetic reluctance variation. Widely used in high‑speed light‑load indexing mechanisms, instruments, teaching laboratory equipment and legacy printing devices. As a special stepper motor solution different from hybrid and PM stepper motors, it fits motion control systems requiring high‑temperature resistance and zero magnetic interference.
Fast Winding Excitation Switching
The stator winding of reluctance stepper motor features fast excitation switching. Magnetic field builds and decays rapidly to support higher pulse frequency input, giving full play to the high‑speed response advantage of reluctance stepper motor.
Low‑inertia High‑speed Dynamic Performance
Reluctance stepper motor owns lightweight rotor with low moment of inertia. It delivers sharp pulse response and higher stepping rate, fast acceleration‑deceleration transition, and maintains valid output at high‑speed range to satisfy high‑speed indexing requirements for reluctance stepper motor applications.
Multi‑phase Salient‑pole Tooth‑slot Structure
Reluctance stepper motor equips multi‑phase salient‑pole stator windings cooperating with toothed rotor. Discrete angular output is realized by tooth‑slot matching. Step angle can be flexibly adjusted by modifying stator‑rotor tooth quantity ratio to meet indexing demands for reluctance stepper motor in varied machinery.
Wide Driving Voltage Compatibility
Reluctance stepper motor features good adaptability to various driving voltages with fewer constraints on power supply selection. It can be easily integrated into industrial equipment with different power specifications and simplify power‑system design for reluctance stepper motor.
Flexible High‑temperature Insulation Options
Free from permanent‑magnet limits, reluctance stepper motor can adopt high‑grade insulating materials for higher winding temperature resistance. It fits ovens and thermal‑processing peripheral machinery and broadens application boundaries of reluctance stepper motor.
Simple Mechanical Structure & Easy Maintenance
Rotor of reluctance stepper motor has no winding or magnet. The whole unit features compact structure, with wear mainly limited to bearings. Fewer failure points reduce later‑stage maintenance and replacement cost of reluctance stepper motor.
| Reluctance Stepper Motor | |
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Dimensions |
Nema 8(20mm), 11(28mm), 14(35mm), 16(39mm), 17(42mm), 23(57mm), 24(60mm), 34(86mm) |
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Step Angle |
Degree 0.9, 1.2, 1.8(Optional or Customized) |
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Torque |
Up to 350mNm without gearbox |
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Rated Current |
0.1A~10A (A/Phase) |
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Gear type |
Planetary gear motor, worm gear motor, helical gear motor |
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Can be used with |
Planetary gearbox, worm gearbox, helical gearbox |
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Package |
carton/wooden box |
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HS codes |
8501109190 |
Q: Can reluctance stepper motor hold position after power‑off?
A: Reluctance stepper motor has no detent torque. The shaft spins freely without power supply and cannot lock position. To maintain stationary position, keep windings energized or add external mechanical locking mechanism.
Q: What about the torque performance of reluctance stepper motor?
A: Reluctance stepper motor delivers lower holding torque than hybrid stepper motor under same frame size. Its strength lies in high‑speed performance instead of low‑speed torque, so it is not fit for heavy‑load applications.
Q: Can reluctance stepper motor work with reduction gearbox?
A: Reluctance stepper motor can assemble with gear reducer to form geared reluctance stepper motor for higher output torque. It is ideal for equipment requiring fast response as well as improved load capacity.
Q: Why does reluctance stepper motor produce relatively loud noise and vibration?
A: Reluctance stepper motor works by magnetic attraction force with obvious tooth‑slot effect, leading to higher intrinsic noise and vibration than hybrid stepper motor. Micro‑stepping drive can reduce jitter of reluctance stepper motor.
Q: Is custom step angle available for reluctance stepper motor?
A: Step angle of reluctance stepper motor is determined by stator‑rotor tooth count and phase number. Custom step angle can be realized by adjusting iron core tooth parameters. Send your working condition to get custom solution for reluctance stepper motor.
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