Blog for students taking ECEN5817 Resonant and Soft Switching Techniques in Power Electronics, ECEE Department, University of Colorado at Boulder, Spring 2012
Saturday, February 6, 2010
HW3 19.8 c: fm
Can someone please give me a hint about getting an expression for fm?
Hello Jusuf, Here is what I get for pb 19.8c. fm can be found by setting |Zio| = |Zi_inf|. The trick is to be careful with the treatment of absolute number. After some math manipulation, I get: Zio = Zi_inf | 1 - fm^2/fo^2 | = | 1 - fm^2/finf^2|
The hint is you can't cancel 1 in this equation, because Zio without absolute number will give negative value (capacitive load), and Zi_inf will give positive value (inductive load). Refer to bode plot skecth of |Zio| and |Zi_inf|.
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Hello Jusuf,
Here is what I get for pb 19.8c.
fm can be found by setting |Zio| = |Zi_inf|.
The trick is to be careful with the treatment of
absolute number.
After some math manipulation, I get:
Zio = Zi_inf
| 1 - fm^2/fo^2 | = | 1 - fm^2/finf^2|
The hint is you can't cancel 1 in this equation, because Zio without absolute number will give negative value (capacitive load), and Zi_inf will give positive value (inductive load). Refer to bode plot skecth of |Zio| and |Zi_inf|.
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