Average Reviews:
(More customer reviews)This book is an utter train wreck. The writing is disorganized, sloppy, imprecise, rambling, ambiguous and incoherent. It was painful to wade through. If this book had an editor, he or she should be fired. Though the author may be an expert on the subject, he has failed to communicate his knowledge to the reader.
I cannot recommend this book. Though I was able to learn a few useful things from it, the high price and the time spent sifting for a few grains of knowledge amongst the chaos more than canceled any benefit. I confess that I am a bit angry with the author for the mess that he excreted and that I subjected myself to.
Try "Electromagnetic Compatibility Engineering" by Henry W. Ott. This book covers a much broader range of topics than "EMI Filter Design," yet the twelve pages devoted to power line filters convey more understanding and useful information than Ozenbaugh's entire book. The remainder of "Electromagnetic Compatibility Engineering" is a gold mine of material that will likely be useful to the sort of engineer that is concerned with EMI filters. Ott's book is well-organized, clear and concise, in complete contrast to "EMI Filter Design."
Lest you think my criticism of "EMI Filter Design" is overly harsh, I recommend that you critically read the first few pages that are offered on Amazon's product page where it says "Click to Look Inside" on the book's photo.
Here are excerpts from other parts of the book to help you judge for yourself:
"1.6. THE INDUCTIVE INPUT FOR THE 220A TEST METHOD
This is similar to the capacitor of the pi filter in the CIP method but not as severe. With the 50 ohms impedance in the 220A test system, what is the inductor impedance going to add? At least the 50 ohms is there and the inductive reactance adds to it at 90 degrees. We are speaking here of either an L or a T filter. They are not responsive until the impedance of the inductor reaches 50 ohms. Regardless, this takes effect orders of magnitude ahead as compared with the capacitance to ground in the CIP method. Both L and T perform very well in the CIP method but are somewhat limited in the 220A method. Calculate the frequency at which the inductor is 50 ohms. This will be the starting point where the inductance will start to function. This explains why most filters are the pi type required to pass the 220A specification.
Summarizing, watch the inductors of the L or T filters in the 220A test method. See the frequency at which they reach 50 ohms."
Or how about
"6.7. THE RC SHUNT
Another technique is preferred to the Cauer but is better when used in high-impedance, low-current circuits. This filter, called the RC shunt, uses fewer components and is automatically balanced across the line to start with, if required (Fig. 6.18). This is formed with a capacitor and a series resistor. Normally, the filter has a resonant rise lower in frequency than the trouble frequency. This is especially true if the filter is a multiple filter such as a double or triple L, pi, or T. Usually, the number of resonant rises is one less than the multiple number, meaning that the single L, pi, or T would not have any resonant rise but the quad would have one less, equaling three. This holds true only if the circuit Q is low enough. The higher Q has a resonant rise for each network. Find the frequency of the lowest resonant rise and pick the capacitor value at this frequency that equals the filter design impedance. This will attenuate each resonant rise above the first and also the trouble frequency. If the resonant rise frequencies are of no concern--well above the fifth harmonic of the power line frequency and well below 10 kHz--choose the capacitor to equal the design impedance at the trouble frequency."
And here's a gem, from a listing of desirable features of dissipative filters in section 6.5:
"A filter would have a filter very similar to an inexpensive LISN would be included within the filter, and two if the unit is the type described and pictured in Fig. 6.16."
Got that? The whole book is a mess. It deserves a grade of F-minus with a frowny face. Make the author sit in the corner until recess.
Click Here to see more reviews about: EMI Filter Design Second Edition Revised and Expanded (Power Engineering)
Offering simple methods of measuring AC and DC power lines, this highly popular, revised and expanded reference describes the selection of cores, capacitors, mechanical shapes, and styles for the timeliest design, construction, and testing of filters. It presents analyses of matrices of various filter types based on close approximations, observation, and trial and error. Supplying simple parameters and techniques for creating manufacturable, repeatable products, the second edition provides insights into the cause and elimination of common mode noise in lines and equipment, explores new data on spike, pulse, trapezoid, and quasisquare waves, and reviews the latest high-current filters.
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