ABSTRACT
Transformers are used in systems to change power from one voltage to another or to provide electrical isolation. is is o¡en driven by a desire to optimize the overall system performance, for example, its economics, reliability, and/or electrical characteristics. To achieve these system goals, a purchaser must specify and a designer must con–gure the transformer to meet a desired impedance, voltage and power rating, thermal characteristic, short-circuit strength, sound level, physical size, and voltage withstand capability. Obviously, many of these goals will produce requirements that are in con«ict, and prudent
21.4 Resonant Frequency Characteristic ............................................. 21-9 De–nitions • Impedance vs. Frequency • Ampli–cation Factor
21.7 Loss Model ..................................................................................... 21-17 Copper Losses • Core Losses • Dielectric Losses
21.9 Models for System Studies ........................................................... 21-24 Model Requirements • Reduced Order Model
References .................................................................................................. 21-25
compromise is required. Failure to achieve an acceptable characteristic for any of these makes the overall transformer design unacceptable. Transformer characteristics and the concomitant design process are outlined in Blume et al. (1951), Bean et al. (1959), MIT (1943), and Franklin (1983).
