By Muhammad H. Rashid
Energy electronics, that is a quickly transforming into region when it comes to examine and purposes, makes use of glossy electronics know-how to transform electrical energy from one shape to a different, resembling ac-dc, dc-dc, dc-ac, and ac-ac with a variable output significance and frequency. It has many functions in our each day existence akin to air-conditioners, electrical autos, sub-way trains, motor drives, renewable strength resources and tool provides for desktops. This e-book covers all elements of switching units, converter circuit topologies, regulate thoughts, analytical equipment and a few examples in their applications.
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Extra resources for Power Electronics Handbook (3rd Edition)
Example text
3) The designed dv/dt value must always be equal or lower than the dv/dt value found from the datasheet. 7 A typical snubber circuit. 6 Series and Parallel Connection of Power Diodes For specific applications, when the voltage or current rating of a chosen diode is not enough to meet the designed rating, diodes can be connected in series or parallel. Connecting them in series will give the structure a high voltage rating that may be necessary for high-voltage applications. However, one must ensure that the diodes are properly matched especially in terms of their reverse recovery properties.
5a The circuit. 6 The current waveform. 5 Snubber Circuits for Diode Snubber circuits are essential for diodes used in switching circuits. It can save a diode from overvoltage spikes, which may arise during the reverse recovery process. A very common snubber circuit for a power diode consists of a capacitor and a resistor connected in parallel with the diode as shown in Fig. 7. When the reverse recovery current decreases, the capacitor by virtue of its property will try to hold the voltage across it, which, approximately, is the voltage across the diode.
Lai, C. K. Tse, “On driving techniques for LEDs: toward a generalized methodology,” IEEE Trans. Power Electronics, vol. 24, no. 12, pp. 2967–2976, December 2009. Section I Power Electronics Devices This page intentionally left blank 2 The Power Diode Ali I. D. 4 Diode as a Switch.................................................................................... Properties of PN Junction ........................................................................ Common Diode Types .............................................................................