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S. J. Young F. P. Dawson A. Konrad Department of Electrical and Computer Engineering University of Toronto |
An Extended Magnet in a Passive dI/dt LimiterThis paper examines a composite magnetic device which has the potential to function as a rate of current change (dI/dt) limiter. A possible application of such a device is to protect voltage source fed systems, either AC or DC, from overcurrents during fault situations. The operation of this dI/dt limiter is discussed, and performance equations are derived. Results obtained from this analysis are compared to a set of finite element simulations. An improvement to the basic design is suggested, in which the permanent magnet slices are extended in order to decrease the amount of leakage flux surrounding the dI/dt limiter. |
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