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Über dieses Buch

This is the final volume in a four-volume series concerning POWER ELEC­ TRONIC CONVERTERS. The first volume studies AC/DC conversion, the second studies AC/ AC conversion, and the third DC/DC conversion. This final volume deals with DC/AC conversion, i.e. with inverters. At the output of an inverter fed by a DC voltage supply, this voltage is alternatively found with one polarity and then with the other; in other words, an AC voltage made up of square pulses is obtained. Filtering must be carried out if, as is normally the case, a virtually sinusoidal voltage is required: this problem of filtering underlies the entire study of inverters. In some applications, the load itself provides the filtering. In others, a filter is installed between the inverter and the load; however, as it will be shown in Chap. 2, in cases where the filtered voltage is at industrial network frequency and comprises only a single square-wave pulse per half-cycle, the filter becomes bulky and costly, and the results obtained are poor. Filtering problems explain the considerable development of inverters during the last years: - Firstly there is increasing use of pulse width modulation: each half-cycle is cut up into several pulses of suitable widths; this greatly simplifies filtering. The use of a chopping frequency which is much greater than the frequency of the fundamental components of the inverter output voltage and current has only been made possible by progress in the field of semiconductor devices.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction and Presentation

Abstract
An inverter is a static converter providing DC-AC conversion. For example, if there is a DC voltage at the input and if, by use of semiconductor switches, each terminal of the load is periodically connected either to one or the other of the input terminals, an AC output voltage is obtained. The frequency of this voltage is given by the frequency of the connection changes.
Guy Séguier, Francis Labrique

Chapter 2. Voltage-Source Inverters with One Square Pulse per Half-Cycle

Without Abstract
Guy Séguier, Francis Labrique

Chapter 3. Pulse-Width-Modulated Voltage-Source Inverters

Abstract
In a pulse-width-modulated inverter, each half-cycle of the output voltage is made up of several square pulses of suitable width, instead of only one square-wave as was the case in the previous chapter.
Guy Séguier, Francis Labrique

Chapter 4. Commutations in Voltage-Source Inverters

Abstract
Voltage-source inverters use current-reversible switches formed by associating controlled semiconductor devices and antiparallel connected diodes.
Guy Séguier, Francis Labrique

Chapter 5. Current-Source Inverters

Without Abstract
Guy Séguier, Francis Labrique

Chapter 6. Resonant Inverters

Abstract
A slightly damped resonant circuit shows a pseudo-cyclical free response, i.e. it tends to oscillate. If it is supplied at a frequency close to its pseudo-oscillating frequency, stable forced oscillations are produced, and the current through it or the voltage across it has a waveform close to a sine wave, depending on whether it is a series or parallel resonant circuit. This is the principle used in resonant inverters.
Guy Séguier, Francis Labrique

Backmatter

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