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Rotor/Stator Windings (for resolvers) Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

Rotor/stator windings for resolvers are specialized electromagnetic components consisting of precisely wound copper wire coils arranged on both rotating (rotor) and stationary (stator) parts of a resolver. These windings generate and detect electromagnetic fields to measure angular position with high accuracy, typically operating on inductive coupling principles. They are critical subcomponents in resolver-based encoders used for position feedback in industrial automation, robotics, and motion control systems.

Working Principle

Operates on electromagnetic induction: AC excitation applied to the rotor winding induces voltages in the stator windings. The amplitude and phase of these induced voltages vary sinusoidally with the rotor's angular position, allowing precise position calculation through signal processing.

Materials

High-purity electrolytic copper wire (typically 0.1-0.5mm diameter) with polyurethane or polyamide-imide insulation, wound on laminated silicon steel cores or high-temperature polymer bobbins. Insulation class: Class F (155°C) or higher for industrial applications.

Technical Parameters

Accuracy ±5 arc-minutes typical
Inductance 10-100 mH
Resistance 5-100 Ω (per winding)
Voltage Rating 50-500V AC
Frequency Range 1-10 kHz
Insulation Resistance >100 MΩ at 500V DC
Operating Temperature -40°C to +155°C

Standards

ISO 13849-1, IEC 60034-18-41, DIN 40050

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rotor/Stator Windings (for resolvers).

Parent Products

This component is used in the following industrial products

Encoder/Resolver

A sensor that converts mechanical motion into electrical signals for position, speed, or direction feedback in control systems.

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Engineering Analysis

Risks & Mitigation

Insulation breakdown due to thermal cycling
Wire breakage from vibration fatigue
Electromagnetic interference from nearby power cables
Moisture ingress causing short circuits

FMEA Triads

Trigger: Thermal stress from frequent start-stop cycles
Failure: Insulation degradation leading to inter-turn shorts
Mitigation: Use high-temperature insulation materials (Class H), implement thermal monitoring, and ensure adequate cooling

Trigger: Mechanical vibration in harsh environments
Failure: Wire fatigue and breakage
Mitigation: Implement vibration-damping mounting, use flexible lead wires, and apply epoxy potting for mechanical stability

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±2% resistance tolerance, ±5% inductance tolerance, winding symmetry within ±1%

Test Method

LCR meter measurements at operating frequency, hipot testing at 1500V AC for 60 seconds, thermal cycling tests per IEC 60068-2-14

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between resolver windings and standard motor windings?

Resolver windings are precision-wound with specific inductance/resistance ratios for signal generation, while motor windings are optimized for torque production. Resolver windings require tighter tolerances and symmetrical construction.

How do temperature changes affect resolver winding performance?

Temperature changes cause copper resistance variation (approximately 0.4%/°C), which can affect signal amplitude. High-quality resolvers use temperature compensation circuits or materials with low temperature coefficients.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

Rotor/Stator Windings (for resolvers)