12.1 AC Voltmeters and Ammeters
AC electromechanical meter movements come in two basic arrangements: those based on DC movement designs, and those...
Tag: Free Book on AC
11.4 Practical Power Factor Correction
When the need arises to correct for poor power factor in an AC power system, you probably won’t have the luxury of...
11.3 Calculating Power Factor
As was mentioned before, the angle of this “power triangle” graphically indicates the ratio between the amount of...
11.2 True, Reactive, and Apparent Power
Reactive Power We know that reactive loads such as inductors and capacitors dissipate zero power, yet the fact that...
11.1 Power in Resistive and Reactive AC circuits
Consider a circuit for a single-phase AC power system, where a 120 volt, 60 Hz AC voltage source is delivering power to...
10.8 Harmonic Phase Sequences
In the last section, we saw how the 3rd harmonic and all of its integer multiples (collectively called triplen...
10.7 Harmonics in Polyphase Power Systems
In the chapter on mixed-frequency signals, we explored the concept of harmonics in AC systems: frequencies that are...
10.6 Three-phase Transformer Circuits
Since three-phase is used so often for power distribution systems, it makes sense that we would need three-phase...
10.5 Three-phase Y and Delta Configurations
Three-phase Wye(Y) Connection Initially, we explored the idea of three-phase power systems by connecting three voltage...
10.4 Polyphase Motor Design
AC Motors Perhaps the most important benefit of polyphase AC power over single-phase is the design and operation of AC...
10.3 Phase Rotation
Three-Phase Alternator Let’s take the three-phase alternator design laid out earlier and watch what happens as the...
10.2 Three-phase Power Systems
What is Split-Phase Power Systems? Split-phase power systems achieve their high conductor efficiency and low safety...
10.1 Single-phase Power Systems
Single phase power system schematic diagram shows little about the wiring of a practical power circuit. Depicted...
9.8 Practical Considerations – Transformers
Power Capacity As has already been observed, transformers must be well designed in order to achieve acceptable power...
9.7 Special Transformers and Applications
Impedance Matching Because transformers can step voltage and current to different levels, and because power is...
