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Thermogenerator package yields 100?W to 10mW

Posted: 25 Nov 2011 ?? ?Print Version ?Bookmark and Share

Keywords:thermogenerator package? waste heat? wireless sensor? actuator?

Micropelt GmbH has rolled a couple of thermogenerator packages (TGP) that according to the company set thermal energy harvesting for mass production. The interchangeable TGP-651 and TGP-751 allow for automatic assembly of autonomous DC power supplies for ultra-low power wireless sensors and actuators, said the company.

Battery maintenance, so far preventing wireless monitoring sensor networks from taking off, can be eliminated by TGP-enabled autonomous DC power modules, claimed Miropelt. Whenever a temperature difference of 5C or more is available, output power from 100?W to 10mW can be produced, enough to offset most batteries.

"At lower gradients, between 10C and 40C, both devices produce very similar power levels, so the TGP-651 with a 6mm2 TEG is preferable for cost reasons"

Output power and cost can be matched to target applications and markets without any changes to the PCB design. "At lower gradients, between 10C and 40C, both devices produce very similar power levels, so the TGP-651 with a 6mm2 TEG is preferable for cost reasons," stated Joachim Nurnus, Micropelt's CTO. "However, for very low gradient operation or high power demand, a TGP-751 with its 12mm2 TEG is the best choice."

The TGP's circular aluminum heat source interface feeds through a 10mm hole of the hosting PCB. The rectangular cold face carries the electrical contacts for reflow soldering and connects to the heat sink on its outer side. The device's vertical dimensions ensure sufficient clearance for electronic components mounted next to it, underneath the heat sink.

The products are available at Micropelt distributors for sampling and evaluation. The TGP-751 is available for $81 sample price, while TGP-651 sells for $54.





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