Receiving Coil: Power Rating 3.3-22 kW, Q Factor >100

Q: What is the typical efficiency range for automotive receiving coils?

Modern automotive receiving coils achieve 90-95% efficiency in optimal alignment conditions, with system efficiency typically 85-92% including power electronics.

Q: How does alignment affect receiving coil performance?

Misalignment reduces coupling coefficient and efficiency. Modern systems maintain >85% efficiency within ±75mm lateral offset through optimized coil design and control algorithms.

Component Specifications

Definition

A precisely engineered inductive coil component in automotive wireless power transfer systems that captures alternating magnetic fields from a transmitting coil and converts them into usable electrical current through electromagnetic induction, typically operating at frequencies between 85-205 kHz for automotive applications.

Working Principle

Operates on Faraday's law of electromagnetic induction where alternating magnetic fields from the transmitter coil induce an alternating voltage in the receiving coil windings, which is then rectified and regulated to charge vehicle batteries.

Materials

Litz wire (typically 200-500 strands of AWG 44-46 copper), ferrite core (Mn-Zn or Ni-Zn), polyimide or epoxy insulation, aluminum shielding, polycarbonate housing

Technical Parameters

Parameter	Typical range	Notes & selection driver
Q Factor	>100
Efficiency	>90%
Inductance	10-100 μH
Power Rating	3.3-22 kW
DC Resistance	<100 mΩ
Resonant Frequency	85-205 kHz
Alignment Tolerance	±75 mm
Coupling Coefficient	0.1-0.3
Operating Temperature	-40°C to 125°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 19363, SAE J2954, IEC 61980, DIN EN 61851

Parent Products

This component is used in the following industrial products

Automotive Wireless Power Transfer System

The Automotive Wireless Power Transfer System is an integrated solution for contactless charging of electric vehicles.

View Product Details

Engineering Analysis

Risks & Mitigation

Electromagnetic interference with vehicle electronics
Thermal overheating during high-power transfer
Mechanical damage from vehicle impacts
Corrosion in harsh environments
Resonance frequency drift over time

FMEA Triads

Trigger: Litz wire insulation breakdown
Failure: Short circuit between strands reducing Q factor
Mitigation: Use high-temperature polyimide insulation and implement thermal monitoring

Trigger: Ferrite core cracking
Failure: Reduced magnetic coupling and efficiency drop
Mitigation: Implement mechanical stress relief design and vibration testing

Trigger: Moisture ingress
Failure: Corrosion and insulation degradation
Mitigation: Apply conformal coating and achieve IP67 rating

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±5% inductance tolerance, ±2% resonant frequency tolerance, <1mm dimensional tolerance on critical features

Test Method

Vector network analyzer for impedance characterization, thermal imaging for hotspot detection, HALT testing for environmental robustness, EMC testing per CISPR 25

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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Manufacturers of Receiving Coil

Manufacturer profiles associated with Receiving Coil.

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Frequently Asked Questions

What is the typical efficiency range for automotive receiving coils?

Modern automotive receiving coils achieve 90-95% efficiency in optimal alignment conditions, with system efficiency typically 85-92% including power electronics.

How does alignment affect receiving coil performance?

Misalignment reduces coupling coefficient and efficiency. Modern systems maintain >85% efficiency within ±75mm lateral offset through optimized coil design and control algorithms.

What materials are critical for high-frequency performance?

Litz wire minimizes skin effect losses at high frequencies, while Mn-Zn ferrite cores provide high permeability and low core losses at 85-205 kHz operating ranges.

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.

Receiving Coil