Wireless Power Testing

The number of products supporting wireless charging continues to increase as the technology advances. In the most diverse areas – automotive, medical technology or entertainment electronics – the convenient technology for wireless charging of devices is now used more frequently.

For placing these devices on the market, various approval requirements must be observed.

 

Testing for a Qi Certification

A Qi certification in accordance with the specifications of the Wireless Power Consortium (WPC) serves as a quality feature of the devices with wireless charging technology. Products that use the Qi standard must be rigorously tested to ensure safety, interoperability, and energy efficiency. Only products that pass these independent tests may use the Qi logo and are considered “Qi Certified”.

 

Regulatory Testing

The WPC is a private certification regime, so that a Qi certification is not a sufficient feature for market approval. Regulatory testing is therefore mandatory and serves as the basis for the regulatory certification of products with a wireless charging function.

For example, for the European market, the Radio Equipment Directive (RED) defines the regulatory test specifications for such products:

ETSI EN 303 417 (Radio)

This standard, in its current version, provides a very detailed description of the test for WPT devices in terms of the effective use of the spectrum. The tests to be performed depend on the device type (sender or receiver):

  • Transmitter (charger)
    • Permitted range of operating frequencies
    • Operating frequency range
    • H-field requirements
    • WPT system unwanted emissions (radiated / conducted)
  • Receiver
    • Radiated Emissions
    • Blocking

EN 301 489-1 & -3 (EMC)

These standards cover requirements to ensure that EMC phenomena are taken into account accordingly. The scope of the test can roughly be divided into two parts:

  • Interference Emission – Which disturbances come from the device and how can they affect other devices?
  • Interference Immunity – How immune is the device against disturbances, which emanate from other devices?

In addition, compliance with the requirements for electrical safety based on the standards EN 62311, EN 60950-1 or EN 62368 is needed, as well as the regulatory approval of the actual device with regard to the technologies used (Bluetooth, WLAN , USB, NFC or mobile).

The regulatory requirements vary between individual certification regimes. For a market approval in the USA, for example, FCC part 18 and/or part 15 serve as the basis for regulatory testing.

 

Our services

While regulatory testing is necessary and indispensable for the market approval of wireless charging devices, the Qi certification of the private Wireless Power Consortium is an additional component in the positioning of the product. Although Qi certification is not required by regulatory standards, the benefits of such approval in terms of product quality, interoperability and commercialization potential are undeniable.

As part of our services, we offer you a comprehensive portfolio in the context of testing wireless power transfer technology. In addition to a variety of regulatory approvals for global market entries, our laboratory in Essen, Germany is the only testing laboratory in Europe to offer certification exams according to various Qi profiles:

  • BPP Baseline Power Profile (commonly called Low Power) for transmitters and receivers with up to 5 watts of power
  • EPP Extended Power Profile (formerly referred to as Medium Power) for transmitter devices with a power of up to 15 watts
  • Certification tests for the combination of Baseline Power Profile (commonly called Low Power) and FOD (Foreign Object Detection)

We are therefore the ideal partner when it comes to the topic of wireless power transfer and can offer you all related services from a single source.

More information about the official Qi certification can be found here.

If you have questions about wireless power transfer, please do not hesitate to contact us directly: https://www.cetecom.com/en/contact/