INDUSTRY COMPONENT

Rotor Plates

Rotor plates are rotating conductive components in variable capacitors that adjust capacitance by changing overlap area with stator plates.

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Component Specifications

Definition
Rotor plates are precision-engineered metallic components that form the moving electrode assembly in variable capacitors. They rotate on a central shaft to vary the effective overlapping surface area with stationary stator plates, thereby enabling precise capacitance adjustment. These plates are typically arranged in a semi-circular or segmented pattern to provide linear or logarithmic capacitance variation.
Working Principle
Rotor plates operate on the principle of variable parallel-plate capacitance. As the rotor rotates, the overlapping area between rotor and stator plates changes, altering the capacitance according to the formula C = εA/d, where ε is permittivity, A is overlap area, and d is plate separation. This mechanical movement allows for continuous capacitance tuning in electronic circuits.
Materials
Aluminum alloy (6061-T6), Brass (C36000), Copper (C11000), or Silver-plated steel; Thickness: 0.3-1.2mm; Surface finish: Electropolished or anodized for corrosion resistance
Technical Parameters
  • Diameter 10-100mm
  • Thickness 0.3-1.2mm
  • Plate Count 2-20 plates
  • Rotation Angle 180-270 degrees
  • Maximum Voltage 250-1000V DC
  • Capacitance Range 5-500pF
  • Temperature Range -40°C to +85°C
  • Contact Resistance <10mΩ
Standards
ISO 9001, IEC 60384-1, DIN 41494

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rotor Plates.

variable capacitor rotor plates tuning capacitor components RF capacitor plates adjustable capacitance electronic components rotor stator assembly Rotor Plates Rotor Plates in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Variable Capacitor

A capacitor whose capacitance can be intentionally and repeatedly changed mechanically or electronically.

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Engineering Analysis

Risks & Mitigation
  • Dielectric breakdown at high voltage
  • Mechanical wear from repeated rotation
  • Corrosion affecting conductivity
  • Resonance at specific frequencies
  • Thermal expansion misalignment
FMEA Triads
Trigger: Material fatigue from repeated rotational stress
Failure: Crack formation leading to mechanical failure
Mitigation: Use fatigue-resistant alloys and implement stress relief design features
Trigger: Oxidation buildup on contact surfaces
Failure: Increased contact resistance and signal loss
Mitigation: Apply protective coatings and specify regular maintenance schedules
Trigger: Thermal expansion mismatch between materials
Failure: Plate warping and capacitance drift
Mitigation: Select materials with similar thermal coefficients and design expansion allowances

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±5% capacitance variation, ±0.1mm dimensional tolerance, ±2° angular positioning accuracy
Test Method
Capacitance measurement per IEC 60384-1, dielectric withstand voltage test, rotational torque measurement, environmental testing per MIL-STD-202

Buyer Feedback

★★★★☆ 4.7 / 5.0 (8 reviews)

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Electrical Equipment Manufacturing sector, I confirm this Rotor Plates meets all ISO standards."

"Standard OEM quality for Electrical Equipment Manufacturing applications. The Rotor Plates arrived with full certification."

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Frequently Asked Questions

What is the primary function of rotor plates in variable capacitors?

Rotor plates serve as the movable electrodes that change overlap area with stator plates to adjust capacitance values in electronic circuits.

How do material choices affect rotor plate performance?

Material selection impacts conductivity, weight, corrosion resistance, and thermal stability. Aluminum offers light weight, brass provides good machinability, while copper offers superior conductivity.

What maintenance do rotor plates require?

Regular cleaning to remove oxidation, lubrication of rotation mechanisms, and inspection for physical deformation or wear at contact points.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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