INDUSTRY COMPONENT

Transmitting Coil

Transmitting coil for automotive wireless charging systems that transfers electrical energy through electromagnetic induction.

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Component Specifications

Definition
A precisely engineered inductive coil component in automotive wireless power transfer systems that generates an alternating electromagnetic field when energized with high-frequency AC current. This component is typically embedded in charging pads or ground-based infrastructure and operates at frequencies between 85-205 kHz for automotive applications, converting electrical energy into magnetic flux that couples with a receiving coil to enable contactless power transfer to electric vehicle batteries.
Working Principle
Operates on Faraday's law of electromagnetic induction. When alternating current flows through the transmitting coil's windings, it generates a time-varying magnetic field. This magnetic field induces an electromotive force (EMF) in the receiving coil through mutual inductance, enabling wireless power transfer across an air gap. The system typically uses resonant inductive coupling to improve efficiency and power transfer distance.
Materials
Litz wire (multiple individually insulated strands) for reduced skin effect, ferrite core material (Mn-Zn or Ni-Zn) for magnetic flux guidance and shielding, polyimide or epoxy insulation, aluminum or copper shielding layers, and high-temperature plastic housing (PPS, PEEK, or LCP).
Technical Parameters
  • Air Gap 100-250 mm
  • Q Factor >100
  • Inductance 10-100 μH
  • Power Rating 3.3-22 kW
  • DC Resistance <100 mΩ
  • Resonant Frequency 85-205 kHz
  • Coupling Coefficient 0.1-0.3
  • Operating Temperature -40°C to 125°C
Standards
ISO 19363, ISO 15118, SAE J2954, IEC 61980, DIN EN 61851

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Transmitting Coil.

wireless charging coil automotive WPT transmitter EV inductive charging transmitting inductor wireless power transfer coil automotive charging pad resonant inductive coupling Transmitting Coil Transmitting Coil in Motor Vehicle Manufacturing

Parent Products

This component is used in the following industrial products

Automotive Wireless Power Transfer System

Wireless charging system for electric vehicles using electromagnetic induction.

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Engineering Analysis

Risks & Mitigation
  • Electromagnetic interference with vehicle electronics
  • Overheating during high-power transfer
  • Foreign object heating
  • Moisture ingress in outdoor applications
  • Mechanical damage from vehicle impact
FMEA Triads
Trigger: Insulation breakdown due to thermal cycling
Failure: Short circuit between windings
Mitigation: Use high-temperature insulation materials (H-class), implement thermal monitoring, and design with thermal expansion compensation
Trigger: Ferrite core cracking from mechanical stress
Failure: Reduced magnetic coupling and efficiency
Mitigation: Use flexible bonding materials, design stress-relief features, and implement shock-absorbing mounting
Trigger: Corrosion of copper windings in harsh environments
Failure: Increased resistance and overheating
Mitigation: Apply conformal coatings, use tinned copper wire, and ensure proper sealing against moisture ingress

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±5% inductance tolerance, ±2% resonant frequency tolerance, positional alignment tolerance ±75 mm lateral, ±25 mm vertical
Test Method
SAE J2954 interoperability testing, ISO 19363 efficiency measurement, IEC 61980-1 safety testing, EMC testing per CISPR 25, thermal cycling per ISO 16750

Buyer Feedback

★★★★☆ 4.9 / 5.0 (13 reviews)

"As a professional in the Motor Vehicle Manufacturing sector, I confirm this Transmitting Coil meets all ISO standards."

"Standard OEM quality for Motor Vehicle Manufacturing applications. The Transmitting Coil arrived with full certification."

"Great transparency on the Transmitting Coil components. Essential for our Motor Vehicle Manufacturing supply chain."

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Frequently Asked Questions

What is the typical efficiency of automotive transmitting coils?

Modern automotive transmitting coils achieve 90-95% efficiency in optimal alignment conditions, with system efficiency (including electronics) typically 85-92% for SAE J2954 compliant systems.

How does misalignment affect transmitting coil performance?

Lateral misalignment reduces coupling coefficient and transfer efficiency. Most systems tolerate 75-100 mm lateral misalignment with efficiency drops of 5-15%. Advanced systems use multiple coil arrays or movable coils to maintain alignment.

What safety features are incorporated in transmitting coils?

Foreign object detection (FOD), living object protection (LOP), temperature monitoring, ground fault detection, and electromagnetic field shielding to ensure compliance with ICNIRP guidelines for human exposure.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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