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.

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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
  • RPM 1200-1800
  • Power 10-30 W
  • Length 40-70 mm
  • Weight 100-300 g
  • Voltage 110-240 V AC
  • Diameter 30-50 mm
  • Shaft Diameter 4-8 mm
Standards
ISO 1328, DIN 42955

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rotor.

refrigerator rotor evaporator fan motor rotor AC motor rotor permanent magnet rotor fan motor component rotor specifications motor maintenance Rotor Rotor in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Refrigerator Evaporator Fan Motor

Electric motor driving airflow across refrigerator evaporator coils

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Servo/Stepper Motors

Precision electric motors that provide controlled rotational motion for positioning and speed control in industrial automation systems.

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Vacuum Pump

A mechanical device that removes gas molecules from a sealed volume to create a partial vacuum within an industrial system.

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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

Interchangeable Parts

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

Buyer Feedback

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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.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Return Spring Mechanism Sealing Boot