By Robert W. Erickson
Fundamentals of strength Electronics, moment Edition, is an up to date and authoritative textual content and reference e-book on energy electronics. This new version keeps the unique goal and philosophy of concentrating on the basic rules, versions, and technical requisites wanted for designing sensible energy digital structures whereas including a wealth of latest fabric.
more suitable positive factors of this re-creation comprise:
- a brand new bankruptcy on enter filters, displaying the way to layout unmarried and a number of part filters;
- significant revisions of fabric on averaged swap modeling, low-harmonic rectifiers, and the bankruptcy on AC modeling of the discontinuous conduction mode;
- New fabric on smooth switching, active-clamp snubbers, zero-voltage transition full-bridge converter, and auxiliary resonant commutated pole. additionally, new sections on layout of multiple-winding magnetic and resonant inverter layout;
- extra appendices on machine Simulation of Converters utilizing averaged change modeling, and Middlebrook's additional point Theorem, together with 4 educational examples; and
- elevated therapy of present programmed keep watch over with whole effects for uncomplicated converters, and lots more and plenty extra.
This version comprises many new examples, illustrations, and workouts to steer scholars and pros during the intricacies of energy electronics layout.
Fundamentals of strength Electronics, moment Edition, is meant to be used in introductory strength electronics classes and similar fields for either senior undergraduates and first-year graduate scholars drawn to converter circuits and electronics, regulate platforms, and magnetic and tool platforms. it's going to even be a useful reference for execs operating in strength electronics, strength conversion, and analog and electronic electronics.
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Example text
Since the converter output voltage is greater than the input voltage, the input current must likewise be greater than the output current. In practice, the inductor current flows through the semiconductor forward voltage drops, the inductor winding resistance, and other sources of power loss. As the duty cycle approaches one, the inductor current becomes very large and these component nonidealities lead to large power losses. In consequence, the efficiency of the boost converter decreases rapidly at high duty cycle.
This converter operates via capacitive energy transfer. As illustrated in Fig. 21, capacitor is connected through to the input source while the switch is in position 2, and source energy is stored in When the switch is in position 1, this energy is released through to the load. The inductor currents and capacitor voltages are defined, with polarities assigned somewhat arbitrarily, in Fig. 20(a). In this section, the principles of inductor volt-second balance and capacitor charge balance are applied to find the dc components of the inductor currents and capacitor voltages.
There is no net change in capacitor charge in steady state. An equivalent statement is 22 Principles of Steady-State Converter Analysis The average value, or dc component, of the capacitor current must be zero in equilibrium. This should be an intuitive result. If a dc current is applied to a capacitor, then the capacitor will charge continually and its voltage will increase without bound. Likewise, if a dc voltage is applied to an inductor, then the flux will increase continually and the inductor current will increase without bound.