By Branko L. Dokić, Branko Blanuša
This ebook is the results of the huge event the authors won via their year-long profession on the college of electric Engineering on the collage of Banja Luka. beginning on the basic fundamentals of electric engineering, the booklet courses the reader into this box and covers the entire correct forms of converters and regulators. realizing is more desirable by way of the given examples, routines and options. hence this e-book can be utilized as a textbook for college students, for self-study or as a reference booklet for professionals.
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Extra info for Power Electronics: Converters and Regulators
Sample text
The maximum frequency of SITH is high and ranges up to several hundred kHz. Another thyristor type can be turned off at the gate. This is the MOS-controlled thyristor (MCT). 1 Characteristics and symbols of nonregenerative switches Elem ent Ideal Characteristic Sy mbol A ID ID V AK Diode V AK C IC IC B I Bn > I B1 U B1 IB V CE C IC IC D IC VG Sn > V G S1 V G S1 V CE ID ID S V CE ID V DS G V GS V CE V CE G V GS S E MOSFET IC V CE E IGBT ID V AK K Bipolar NPN Transistor Re al Characteristic VG Sn > V G S1 V G S1 V DS V DS maximum ratings are 1,000 V and 100 A.
3) is the p-n junction resistance. , Rd = rd + rb. At high currents the resistance rb is dominant and the V-I characteristic in that region is almost linear. In many practical applications a conducting diode can be approximated, with a satisfactory accuracy, by a straight line of the slope determined by RD and a voltage source VDt (Fig. 2a). Then Vd ¼ VDt þ RD ID : ð2:4Þ On the other hand, in the majority of diode applications as a switch, the resistance of the driving circuit, which determines the current IDQ in the quiescent operating point Q, is much higher than RD so that the voltage variation across the diode is negligible.
20a attenuates the primary source current created by the stabilizer, which behaves like a pulse load. Considerably, more efficient are the circuits shown in Fig. 20b, c. In these cases, “isolation” of the stabilizer from the input and the output lines is accomplished. In this way the stabilizer “floats” in its own oscillations. This is carried out by introducing chokes in both the input and the output lines of the stabilizer. The problems caused by interference are most efficiently solved if interference is taken into consideration throughout the design and production of a converter.