Abstract
This paper presents a novel energy-harvesting model which takes the primary current, secondary turns, dimension, the magnitude of magnetic flux density B, and the core loss resistance into consideration systematically. The relationship among the potential maximum output power, the dimension of energy harvesting coil (EHC), the load type of EHC, and the secondary turns is predicted by theoretical analysis and further verified by experiments. A high power density harvester is also developed and tested. It is shown that the power density of this novel harvester is 0.7 mW/g at 10 A, which is more than 2 times powerful than the traditional ones. Hence, it could lighten the half weight of the harvester at the same conditions.
Highlights
The move towards a Smart Grid requires utilities to have a smarter and improved asset monitoring infrastructure to ensure the highest levels of reliability in the evolving electricity grid.[1]
The relationship among the potential maximum output power, the dimension of energy harvesting coil (EHC), the load type of EHC, and the secondary turns is predicted by theoretical analysis and further verified by experiments
This paper focuses on the power output model of CTbased harvester, which takes the primary current, secondary turns, dimension, the magnitude of magnetic flux density B, and the core loss resistance into consideration systematically
Summary
The move towards a Smart Grid requires utilities to have a smarter and improved asset monitoring infrastructure to ensure the highest levels of reliability in the evolving electricity grid.[1]. Roscoe et al assumed that the magnitude of magnetic flux density B was constant and concluded that the power output density of the harvester was proportional to the number of the secondary turns and core length to diameter ratio. It is true for the application in which B is constant. When the primary current and load change, the magnitude of magnetic flux density B will change, so a power output model of an EHC with varied B needs to be established. This paper focuses on the power output model of CTbased harvester, which takes the primary current, secondary turns, dimension, the magnitude of magnetic flux density B, and the core loss resistance into consideration systematically. The test result shows that the proposed power output model could output more than 2 times power than the traditional ones, which could lighten the half weight of the harvester at the same conditions
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