Stator/Rotor Windings: Temperature Range -40°C to +155°C

Component Specifications

Definition

Stator/rotor windings are conductive coils, typically made of insulated copper or aluminum wire, wound around laminated cores within feedback devices like encoders and resolvers. In resolvers, these windings function as transformers: the rotor winding (excitation winding) receives an AC reference signal, inducing voltages in the stator windings (sine and cosine windings) proportional to the rotor's angular position. In encoders, windings may be part of inductive or magnetic sensing elements. They are critical for converting mechanical rotation into electrical signals, providing accurate angular position, speed, and direction data to control systems in motors, robotics, and automated equipment.

Working Principle

Operates on electromagnetic induction. In resolvers, an AC excitation current in the rotor winding creates a varying magnetic field. As the rotor turns, this field couples with stationary stator windings, inducing output voltages whose amplitudes vary sinusoidally with the rotation angle (sine and cosine outputs). The phase or amplitude modulation of these signals encodes the position. In inductive encoders, windings interact with a toothed rotor to generate periodic signals. The precise winding patterns and phase relationships enable high-resolution position detection.

Materials

Copper magnet wire (e.g., MW 35-C, Class 180 polyurethane insulation) or aluminum wire; insulation materials like polyurethane, polyester, or polyimide (e.g., Kapton); laminated steel cores (e.g., silicon steel); epoxy or varnish for impregnation; protective coatings.

Technical Parameters

Parameter	Typical range	Notes & selection driver
IP Rating	IP50-IP67 (depends on housing)
Inductance	1-100 mH
Resistance	5-200 ohms (per winding)
Wire Gauge	AWG 20-40
Voltage Rating	5-50 V AC/DC
Insulation Class	Class B (130°C) to Class H (180°C)
Temperature Range	-40°C to +155°C

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 13849, IEC 60034, DIN 40050

Parent Products

This component is used in the following industrial products

Feedback Device (Encoder/Resolver)

A precision sensor that provides real-time position, speed, and direction feedback to servo motor control systems.

View Product Details

Engineering Analysis

Risks & Mitigation

Insulation degradation from heat or moisture
Wire breakage due to vibration
Electrical shorts from contamination
Signal interference from poor shielding
Misalignment during installation

FMEA Triads

Trigger: Overheating from excessive current or ambient temperature
Failure: Insulation breakdown leading to short circuits
Mitigation: Use high-temperature insulation materials (e.g., Class H), ensure adequate cooling, and implement current limiting in drive circuits.

Trigger: Mechanical stress from vibration or shock
Failure: Wire fatigue and open circuits
Mitigation: Secure windings with impregnation (varnish/epoxy), use flexible lead wires, and mount devices with anti-vibration fittings.

Trigger: Exposure to oils, coolants, or corrosive chemicals
Failure: Insulation corrosion and electrical leakage
Mitigation: Apply protective coatings, select chemical-resistant materials, and use sealed housings (e.g., IP67 rating).

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Winding resistance ±5%, inductance ±10%, phase alignment ±1 degree

Test Method

Electrical tests (resistance, insulation resistance, hipot), signal integrity tests (Lissajous pattern analysis), environmental tests (thermal cycling, vibration per IEC 60068)

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

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Manufacturers of Stator/Rotor Windings

Manufacturer profiles associated with Stator/Rotor Windings.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between stator and rotor windings in a resolver?

In a resolver, rotor windings (excitation windings) rotate and receive an AC input signal, while stator windings (output windings) are stationary and produce sine and cosine voltage outputs that vary with rotor angle, enabling precise position calculation.

How do winding failures affect encoder/resolver performance?

Failures like short circuits, open circuits, or insulation breakdown can cause signal loss, noise, drift, or complete device failure, leading to inaccurate position feedback, system errors, or machinery downtime.

Can stator/rotor windings be repaired or replaced?

Repair is often impractical due to precision winding requirements; replacement of the entire winding assembly or feedback device is typical. Specialized rewinding services exist but may not restore original performance.

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.

Stator/Rotor Windings