Transcription of Chapter 15 Transformer Design
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Chapter 15 Transformer Design
Fundamentals of Power ElectronicsChapter 15: Transformer design1 Chapter 15 Transformer DesignSome more advanced Design issues, not considered in previouschapter: Inclusion of core loss Selection of operating fluxdensity to optimize total loss Multiple winding Design : as inthe coupled-inductor case,allocate the available windowarea among several windings A Transformer designprocedure How switching frequencyaffects Transformer sizen1 : n2: nkR1R2Rk+v1(t) +v2(t) +vk(t) i1(t)i2(t)ik(t)Fundamentals of Power ElectronicsChapter 15: Transformer design2 Chapter 15 Transformer Transformer Design : Basic A step-by-step Transformer Design AC inductor SummaryFundamentals of Power ElectronicsChapter 15: Transformer Transformer Design :Basic ConstraintsCore lossTypical value of for ferrite materials: or B is the peak value of the ac component of B(t), , the peak ac fluxdensitySo increasing B causes core loss to increase rapidlyThis is the first constraintPfe=Kfe( B) AclmFundamentals of Power ElectronicsChapter 15: Transformer design4 Flux densityConstraint #2 Flux density B(t) is related to t
Fundamentals of Power Electronics Chapter 15: Transformer design3 15.1 Transformer Design: Basic Constraints Core loss Typical value of for ferrite materials: 2.6 or 2.7 B is the peak value of the ac component of B(t), i.e., the peak ac flux density So increasing B causes core loss to increase rapidly This is the first constraint P fe = K fe ...
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