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Top 5 Checks to Perform when Evaluating Wireless Power Systems

26 March 2020

When considering which wireless power technology is best to power your product, an obvious best practice is to “try before you buy”: test out the system before committing to it. Here are the top things you should look at:

  • Get an evaluation system. Think about it: if a vendor can’t provide a demo system for evaluation, what are they hiding?
  • Measure the output power, not just the output voltage, using an electronic load:
    • Measure the output power at various distances. Some technologies are very sensitive to increased distances.
    • Measure the output power at various transmitter and receiver orientations. Some approaches are very sensitive to the receiver and transmitter not being parallel
    • Measure at a scenario that is representative of the expected use
  • Consider the size of the transmitter and the receiver. The receiver size is often determined by the type of technology that is being used. Don’t expect a substantial reduction in the receiver size without changing the technology.
  • Check the safety certificates. Is the product safe for consumer use (stricter requirements) or commercial use (more lenient requirements)? Under what conditions (e.g. distance, receiver size, power, relative position) is safety granted?
  • Bonus question: measure the power consumption of the transmitter. This will give you a sense of the end-to-end efficiency and the cost of electricity to power your device.

Long-range wireless power can lead to revolutionary product innovations. The expert move is to make sure you perform thorough due diligence.

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