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Cymbet Corp. issues energy harvesting white paper


Cymbet Corp.

The Cymbet Corp., Elk River, Minn., which was the first to market eco-friendly rechargeable solid state batteries that provide electronic systems designers with new embedded power capabilities, recently issued a while paper titled, "Zero Power Wireless Sensors Using Energy Processing."

Universal Energy Harvesting Kit

The figure above shows the EnerChip EP Energy Processor and EnerChip solid state batteries on the Cymbet EVAL-09 Universal Energy Harvesting kit, which is said to interface with any type of EH transducer.

The paper covers the company's EnerChip technology and energy harvesting kit, which together are said to be suitable for energy storage applications for integrated circuits and new products for medical, sensor, RFID, industrial control, communications and portable electronic devices.

According to the white paper: "Zero Power Wireless Sensors require energy processing, low-power management circuitry to condition the transducer output power, store energy and deliver power to the rest of the wireless sensor. In most environments, any of transducers producing power cannot be relied on under all circumstances to continuously supply power to the load. While each transducer delivers power at some amplitude and with some regularity, they do not store energy. Consequently, when that source of power is not present, there would be no power to supply the load in the absence of an energy storage device. ... Traditional rechargeable energy storage devices such as supercaps and coin cell batteries have severe limitations with respect to charge/discharge cycle life, self-discharge, and charge current and voltage requirements.

"An energy processor, such as Cymbet’s EnerChip™ EP CBC915, provides all of the energy conversion, energy storage, and load power management for the Zero Power Wireless Sensor.In order to produce high efficiency transducer energy conversion the energy processor performs maximum peak power tracking by emulating the impedance of the transducer. The energy processor also coordinates all the power-up sequencing even from a dead start with no charge in the system."

To obtain a copy of the white paper, visit the Cymbet Web site here.

Submitted by Dennis Spaeth