INDUSTRY COMPONENT

Rotor

The rotor is the rotating component in a refrigerator evaporator fan motor that converts electrical energy into mechanical motion to drive the fan blades.

Component Specifications

Definition
In a refrigerator evaporator fan motor, the rotor is the central rotating assembly that consists of a laminated iron core with copper windings or permanent magnets, mounted on a shaft. When energized, electromagnetic forces cause it to rotate within the stator, generating torque to spin the attached fan blades. This rotation facilitates airflow across the evaporator coils, enabling efficient heat exchange and maintaining consistent cooling temperatures within the refrigerator compartment.
Working Principle
The rotor operates on electromagnetic induction principles. In induction motors, alternating current in the stator windings creates a rotating magnetic field, which induces currents in the rotor windings, producing torque. In permanent magnet motors, the rotor's magnets interact with the stator's magnetic field to generate rotation. This mechanical rotation is transferred via the shaft to the fan blades, creating airflow.
Materials
Typically made from laminated silicon steel sheets to reduce eddy current losses, with copper or aluminum windings for induction types, or neodymium/ferrite permanent magnets for PM types. The shaft is usually hardened steel, and bearings are often sintered bronze or ball bearings.
Technical Parameters
ParameterTypical rangeNotes & selection driver
RPM1200-1800
Power10-30 W
Length40-70 mm
Weight100-300 g
Voltage110-240 V AC
Diameter30-50 mm
Shaft Diameter4-8 mm

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 1328, DIN 42955

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Overheating due to electrical overload
  • Imbalance causing vibration and noise
  • Bearing failure leading to seizure
  • Corrosion in high-humidity environments
FMEA Triads
Trigger: Bearing lubrication loss
Failure: Increased friction, overheating, and eventual seizure
Mitigation: Use sealed or self-lubricating bearings; regular maintenance checks
Trigger: Electrical insulation breakdown
Failure: Short circuits, motor burnout
Mitigation: Implement high-grade insulation materials; ensure proper voltage regulation

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Shaft runout tolerance within 0.05 mm, balance grade G6.3 per ISO 1940
Test Method
Dynamic balancing test, insulation resistance test (min 100 MΩ at 500 V DC), no-load and load performance testing

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 Rotor

Manufacturer profiles associated with Rotor.

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Gland Body
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Current Sense Resistor
A precision resistor used to measure current flow in electrical circuits by converting current to a measurable voltage drop.

Frequently Asked Questions

What causes a rotor to fail in a refrigerator fan motor?

Common causes include bearing wear leading to imbalance, overheating from electrical faults, corrosion in humid environments, or physical damage from debris.

Can a rotor be replaced separately in a fan motor?

Yes, if compatible, but often requires disassembly of the motor. In many designs, the rotor is integrated, and replacement might involve the entire motor assembly.

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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