INDUSTRY COMPONENT

Stator

Stationary electromagnetic component in servo/stepper motors that generates rotating magnetic fields to drive rotor motion.

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Component Specifications

Definition
The stator is the stationary part of an electric motor, specifically in servo and stepper motors, consisting of a laminated steel core with precisely wound copper windings arranged in slots. When energized with controlled electrical currents, it produces a rotating magnetic field that interacts with the rotor's magnetic field to create torque and precise rotational motion. In servo motors, stators enable high-torque, variable-speed operation with feedback control, while in stepper motors, they facilitate precise incremental positioning through sequential phase activation.
Working Principle
Operates on electromagnetic induction principles: when alternating or pulsed currents flow through the stator windings, they generate a rotating magnetic field. This field interacts with the rotor's permanent magnets or magnetic reluctance, producing mechanical torque. In servo motors, the stator's field rotation is synchronized with rotor position via feedback, while stepper motors use digital pulse sequences to advance the magnetic field in discrete steps.
Materials
Laminated electrical steel (M19-M47 grades) for core reduction of eddy currents, copper magnet wire (typically 18-24 AWG) with Class F (155°C) or higher insulation, epoxy or varnish impregnation for thermal and mechanical stability, insulating paper or slot liners (Nomex or polyester), and aluminum or steel housing.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Current Rating1A-50A per phase
Voltage Rating24V-480V AC/DC
Insulation ClassClass F (155°C) or Class H (180°C)
Slot Fill Factor70%-85%
Inductance Per Phase1mH-100mH
Resistance Per Phase0.1Ω-10Ω
Winding Configuration3-phase for servo, 2-phase or 4-phase for stepper

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 9001, IEC 60034, NEMA MG1, DIN EN 60034

Parent Products

This component is used in the following industrial products

Servo/Stepper Motors

Precision electric motors that provide controlled rotational motion for positioning and speed control in industrial automation systems.

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Drive Motor

Electric motor that provides rotational power to drive the blending mechanism in pharmaceutical powder blending equipment

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Main Motor

The main motor is the core power component of a panel saw, responsible for converting electrical energy into mechanical rotation to drive the circular cutting blade.

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Engineering Analysis

Risks & Mitigation
  • Insulation breakdown due to overheating or voltage spikes
  • Winding short circuits from mechanical damage or contamination
  • Core saturation leading to efficiency loss
  • Misalignment causing vibration and reduced lifespan
FMEA Triads
Trigger: Thermal overstress from excessive current or poor cooling
Failure: Insulation degradation and winding short circuit
Mitigation: Implement temperature sensors, use high-temperature insulation materials, and ensure adequate ventilation or cooling systems
Trigger: Voltage transients from drive electronics
Failure: Insulation puncture and arc damage
Mitigation: Install surge protection devices, use reinforced insulation, and follow proper grounding practices

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Winding resistance ±5%, inductance ±10%, dimensional tolerances per ISO 2768-m
Test Method
Hi-pot testing (1500V AC for 1 minute), insulation resistance test (>100MΩ at 500V DC), winding resistance measurement, inductance verification via LCR meter, and thermal cycling tests

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Stator

Manufacturer profiles associated with Stator.

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Shaft Bearing
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Seal Groove
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Frequently Asked Questions

What is the difference between servo motor stators and stepper motor stators?

Servo motor stators typically use 3-phase windings for smooth, high-speed rotation with feedback control, while stepper motor stators have 2-phase or 4-phase windings for precise step-by-step positioning without feedback. Servo stators are optimized for dynamic torque, whereas stepper stators focus on holding torque and step accuracy.

How do stator windings affect motor performance?

Winding configuration, wire gauge, and turn count directly impact torque, speed, efficiency, and thermal characteristics. Higher turn counts increase torque but reduce speed, while thicker wire lowers resistance for higher current capacity. Proper winding design minimizes cogging, reduces losses, and ensures compatibility with drive electronics.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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Stationary Vanes Stator (Electric) / Housing (Hydraulic)
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