The advantages of Tseetech 200W mid-power wireless power solution

In How to design a cost-effective, highly efficient e-scooter contactless solution? — Tseetech — Wireless Power Enabler for All Levels , we have clearly explained why Tseetech 200W mid-power wireless power solution TE03 is superior in the power efficiency performance. However, in real-life applications, people care about the safety and user experience more instead of the efficiency number.

Transmitter & Receiver modules of Tseetech TE03

We did several tests to prove this wireless power module pair can provide a safe and comfortable operation experience.

First of all, we checked the temperature rise performance. At room temperature equals 24.9℃, we keep the coil to coil distance as 20mm, and let the receiver module outputs 200W continuously, lasting for 1 hour. And then, we use a Fluke VT04A Infrared Thermometer to check the temperature of the module pair. Below is the result, the transmitter coil reaches 42℃ at its maximum, the transmitter PCBA reaches 67.9℃ at its maximum, and the receiver PCBA reaches 58.3℃ at its maximum.

TE03 20mm temperature-rise test

And then, we increase the coil to coil distance to 35mm, the upper limit of TE03. Again, we let the receiver module outputs 200W continuously, lasting for 1 hour. And we use a Fluke VT04A Infrared Thermometer to check the temperature of the module pair. Below is the result, the transmitter coil reaches 53.4℃ at its maximum, the transmitter PCBA reaches 68.8℃at its maximum, and the receiver PCBA reaches 55.3℃ at its maximum.

TE03 20mm temperature-rise test

From above, we can see that the temperature rise of the whole module pair is within an acceptable range. Undoubtedly, this can provide a very comfortable user experience for medium power wireless charging application

In wireless charing, the strong magnetic field will heat up metal objects falling in the charging area due to eddy currents generated in the objects. To deal with these issues, foreign object detection (FOD) should be developed for the safe operation of wireless charging systems. Tseetech uses exclusively FOD algorithm to immediately detect any foreign metal object for protecting the whole system.

We checked two scenarios of before power transfer and during power transfer for foreign object detection. Firstly, before power transfer, we check if TE03 can detect the foreign object well. Below, we put a tiny coin on top of the transmitter coil; the transmitter module detects it immediately, stops charging, and lights a red light as a warning. Then we test foreign object detection during power transfer.

We remove the tiny coin and place the receiver module into the charging zone, keeping the coil to coil distance as 20mm. While the receiver module outputs 200W steadily, we insert a tiny coin into the charging zone; the transmitter detects it immediately, stops the magnetic field, and lights a red light as a warning.

Then, we remove the tiny coin and charging continues to work normally. Following the above steps, We keep the coil to coil distance as 35mm. While the receiver module outputs 200W steadily, we insert a tiny coin into the charging zone; the transmitter detects it immediately, stops the magnetic field, and lights a red light as a warning.

With the above test steps, we checked all the possible foreign object insertion scenarios with several sizes of coins; the TE03 can protect itself well in all the conditions.

TE03 full FOD tests result

Per described, TE03 is indeed a state-of-the-art solution for medium wireless charging. TE03 satisfies all the key advantages of applying contactless charging, convenient, safe, and robust. This solution is cost-effective and ready for mass production. We welcome you to contact us right now, and we look forward to a joyful adventure with you.