Clik here to view.
Single-Phase Power Systems
Single phase power system schematic diagram shows little about the wiring of a practical power circuit. Depicted above (Figure above) is a very simple AC circuit. If the load resistor's power...
View ArticleThree-Phase Power Systems
Split-phase power systems achieve their high conductor efficiency and low safety risk by splitting up the total voltage into lesser parts and powering multiple loads at those lesser voltages, while...
View ArticleClik here to view.
Phase Rotation
Let's take the three-phase alternator design laid out earlier (Figure below) and watch what happens as the magnet rotates. Three-phase alternator The phase angle shift of 120o is a function of the...
View ArticlePolyphase Motor Design
Perhaps the most important benefit of polyphase AC power over single-phase is the design and operation of AC motors. As we studied in the first chapter of this book, some types of AC motors are...
View ArticleClik here to view.
Three-phase Y and Delta Configurations
Initially we explored the idea of three-phase power systems by connecting three voltage sources together in what is commonly known as the "Y" (or "star") configuration. This configuration of voltage...
View ArticleThree-Phase Transformer Circuits
Since three-phase is used so often for power distribution systems, it makes sense that we would need three-phase transformers to be able to step voltages up or down. This is only partially true, as...
View ArticleHarmonics in Polyphase Power Systems
In the chapter on mixed-frequency signals, we explored the concept of harmonics in AC systems: frequencies that are integer multiples of the fundamental source frequency. With AC power systems where...
View ArticleHarmonic Phase Sequences
In the last section, we saw how the 3rd harmonic and all of its integer multiples (collectively called triplen harmonics) generated by 120o phase-shifted fundamental waveforms are actually in phase...
View ArticleClik here to view.
Single-Phase Power Systems
Single phase power system schematic diagram shows little about the wiring of a practical power circuit. Depicted above (Figure above) is a very simple AC circuit. If the load resistor's power...
View ArticleThree-Phase Power Systems
Split-phase power systems achieve their high conductor efficiency and low safety risk by splitting up the total voltage into lesser parts and powering multiple loads at those lesser voltages, while...
View ArticleClik here to view.
Phase Rotation
Let's take the three-phase alternator design laid out earlier (Figure below) and watch what happens as the magnet rotates. Three-phase alternator The phase angle shift of 120o is a function of the...
View ArticlePolyphase Motor Design
Perhaps the most important benefit of polyphase AC power over single-phase is the design and operation of AC motors. As we studied in the first chapter of this book, some types of AC motors are...
View ArticleClik here to view.
Three-phase Y and Delta Configurations
Initially we explored the idea of three-phase power systems by connecting three voltage sources together in what is commonly known as the "Y" (or "star") configuration. This configuration of voltage...
View ArticleThree-Phase Transformer Circuits
Since three-phase is used so often for power distribution systems, it makes sense that we would need three-phase transformers to be able to step voltages up or down. This is only partially true, as...
View ArticleHarmonics in Polyphase Power Systems
In the chapter on mixed-frequency signals, we explored the concept of harmonics in AC systems: frequencies that are integer multiples of the fundamental source frequency. With AC power systems where...
View ArticleHarmonic Phase Sequences
In the last section, we saw how the 3rd harmonic and all of its integer multiples (collectively called triplen harmonics) generated by 120o phase-shifted fundamental waveforms are actually in phase...
View Article