Rotor/Armature: Diameter 10-500 mm, Length 20-1000 mm

Component Specifications

Definition

The rotor (in AC motors) or armature (in DC motors) is the central rotating part of an electric motor or solenoid, consisting of a laminated iron core with conductive windings or bars. When energized, it interacts with the stator's magnetic field to produce torque, enabling rotational motion. In solenoids, it functions as the movable plunger that creates linear motion when magnetically actuated.

Working Principle

Operates on electromagnetic induction: when current flows through windings, it creates a magnetic field that interacts with the stator's field, generating Lorentz force and producing rotational torque (in motors) or linear force (in solenoids).

Materials

Electrical steel laminations (M19-M47 grades), copper or aluminum windings (Class H insulation), steel shaft (AISI 1045/4140), balancing weights, and insulating varnish.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Power	0.1-500 kW
Speed	500-20000 RPM
Length	20-1000 mm
Voltage	12-690 V
Diameter	10-500 mm
IP Rating	IP54-IP68
Insulation Class	B/F/H

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 8821, IEC 60034, NEMA MG1, DIN EN 60034

Parent Products

This component is used in the following industrial products

Motor/Solenoid

Electromechanical component that converts electrical energy into mechanical motion or force within an adjustment actuator system.

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Engineering Analysis

Risks & Mitigation

Electromagnetic interference
Overheating due to overload
Mechanical imbalance causing vibration
Insulation breakdown leading to short circuits
Bearing failure

FMEA Triads

Trigger: Insulation degradation from thermal cycling
Failure: Winding short circuit
Mitigation: Use high-temperature insulation materials (Class H), implement thermal protection sensors, and ensure proper cooling

Trigger: Unbalanced mass distribution
Failure: Excessive vibration and bearing wear
Mitigation: Dynamic balancing during manufacturing, regular vibration monitoring, and precision machining of components

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.05 mm for shaft diameter, ±0.1° for balance, ±5% for electrical resistance

Test Method

Hi-pot testing (dielectric strength), surge testing, dynamic balancing, thermal cycling, and vibration analysis per IEC 60034 standards

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

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Supplier transparency

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Manufacturers of Rotor/Armature

Manufacturer profiles associated with Rotor/Armature.

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Frequently Asked Questions

What is the difference between rotor and armature?

Rotor refers to the rotating part in AC motors, while armature specifically denotes the rotating winding assembly in DC motors that carries alternating current. Both serve similar functions but differ in construction and current type.

How do you maintain rotor/armature components?

Regular inspection for insulation damage, bearing wear, and balance issues; cleaning to prevent contamination; and testing winding resistance and insulation resistance periodically.

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/Armature