Contents
Nomenclature and Abbreviations
1Pulse width modulation techniques
1.2Basic pulse width modulation techniques
1.2.1Single pulse width modulation
1.2.2Multiple pulse width modulation
1.2.3Sinusoidal pulse width modulation
1.3Advanced modulation techniques
1.3.4Harmonic-injected modulation
1.3.6Space vector pulse width modulation
1.4Advantages of pulse width modulation techniques
2Space vector pulse width modulation technique
2.2.2Definition of space vector
2.3SVPWM for the two-level inverter
2.3.1Three-phase voltage source inverter
2.3.2Determination of switching states
2.3.3Calculation of switching times
2.3.4Optimized switching sequence
3Multilevel inverter topologies
3.1Diode-clamped multilevel inverter
3.2Flying capacitor multilevel inverter
3.3Cascade H-bridge multilevel inverter
4Space vector pulse width modulation algorithm for the three-level inverter
4.1SVPWM for the three-level inverter
4.1.1Three-level inverter topology and switching states
4.1.2Voltage vectors and calculation of switching times
4.1.3Optimized switching sequence
5Space vector pulse width modulation for multilevel inverters using fractal approach
5.1Inherent fractal structure of multilevel inverter
5.2SVPWM algorithm using the fractal approach
5.2.1Three-phase (a, b, c) to two-phase (d, q) transformation
5.2.2Location of the reference voltage vector
5.2.3Determination of nearest three voltage vectors
5.2.4Triangularization algorithm
5.2.5Comparison of the reference vector with the centroid
5.2.6Calculation of switching times
5.3Algorithm implementation for the three-level inverter
5.3.1Determination of switching vectors
5.3.2Determination of centroid
5.3.3Determination of switching times
5.3.4Determination of optimized switching sequence
5.4Implementation of the algorithm for the five-level inverter
5.4.1Determination of switching vectors
5.4.2Determination of centroids
5.4.3Determination of switching times
5.4.4Determination of optimized switching sequence
6Qualitative space vector pulse width modulation algorithm for multilevel inverters
6.1A qualitative SVPWM algorithm for multilevel inverters
6.2.1Calculation of duty cycles
6.2.2A qualitative SVPWM algorithm
6.2.4Location of the reference vector and correction of duty cycles
7Space vector pulse width modulation for multilevel inverters using the decomposition method
7.2SVPWM algorithm using the decomposition method
7.2.1Basic principle of the decomposition method
7.2.2First correction of the reference voltage vector
7.2.3Second correction of the reference voltage vector
7.2.4Third correction of the reference voltage vector
7.2.5Determination of switching times
8An analytical space vector pulse width modulation method for multilevel inverters
8.1Relation between three- and two-level SVPWMs
8.1.1SVPWM for the two-level inverter
8.1.2Switching times calculation for the three-level inverter
8.2Switching states and switching sequence