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A way to describe the LLC ballast in tranconductance Gm mode for current conversion to drive LED streetlight is proposed. On Gm description, the load response can be clearly observed in Region 2 since the transfer curves can be expanded outward as per the increase of the quality factor, and no curves huddled; in contrast, it is difficult to obviously view the load behavior in that region by using...
This paper proposes an improved cell balancing circuit for fast equalization among the lithium ion (Li-ion) batteries. Usually, the battery cell balancing circuit uses the sensor to estimate the accurate SOC (state of charge) of each battery cell and to operate the switch selectively [1], but it makes the system bulky and expensive. A simple voltage sensorless charge balancing circuit has been proposed...
In this paper, a detailed design procedure is presented for a bidirectional resonant converter for battery charging application. This converter is similar to the LLC resonant converter with an extra inductor and capacitor in the secondary side. Soft-switching can be ensured in all switches without additional circuitry, and because of that, very high frequency operation is possible, hence; the size...
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