Extended power module life for wireless transmitters

22 September 2015

Emerson Process Management is making energy harvesting a reality for its Smart Wireless transmitters through the use of Perpetuum’s Vibration Energy Harvester and Intelligent Power Module solutions. 

Energy harvesting converts unused energy, such as vibration from pumps and motors, into electric energy.  Perpetuum vibration energy harvesters provide external power to Emerson’s transmitters. This helps to decrease maintenance requirements by extending the life of the power module.

The vibration energy harvester Power Module developed by Perpetuum is designed to last over 100 years. The electromagnetic-energy harvesters convert mechanical energy (vibration) to electrical energy via an oscillating mass (magnet), which traverses across a coil creating a varying amount of magnetic flux, inducing a voltage according to Faraday's law. The energy harvesting solution is fully certified to FM (Class1 Div1, Groups A, B, C, D), as well as ATEX and IECEx (Zone 0). It is Intrinsically Safe and is classified for use in hazardous areas.

“Energy harvesting delivers significant economic benefits, not just from avoiding power module replacement costs, but also by eliminating unnecessary maintenance logistics and relieving skilled labour to concentrate on more essential plant operations,” said Bob Karschnia, vice president of Smart Wireless Solutions for Emerson Process Management.

The Rosemount 3051S Wireless Pressure Transmitter is the first Emerson wireless transmitter to utilise the technology. 


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