Rotor/Stator Windings (for resolvers): Frequency Range 1-10 kHz

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

Parameter	Typical range	Notes & selection driver
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

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

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

Typical Suppliers & Equivalents

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

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

Manufacturers of Rotor/Stator Windings (for resolvers)

Manufacturer profiles associated with Rotor/Stator Windings (for resolvers).

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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.

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.

Rotor/Stator Windings (for resolvers)