Learn the principles of AC/DC and solid-state theories. Digital electronic theory is also introduced.
Three-Phase AC Circuits (A8203)
This lesson is designed for participants familiar with AC circuits and AC voltage. A basic understanding of how to interpret changes in AC voltage over time is also required.
This lesson shows how three-phase AC voltage is generated and describes different characteristics of three-phase voltage. The lesson introduces two types of winding electrical connections with graphic demonstrations of their effect on voltage and current. Also presented are transformers and the way in which they affect voltage and current.
Explain how voltage is induced in a three-phase system. Use a sine wave to explain how three-phase voltage changes over time. Describe the effect of three-and four-wire wye connections have on the relationships between phase and line voltage and current in a three-phase system. Describe the effect of a delta connection on the relationship between phase and line voltage and current in a three-phase system. Identify the basic parts of a transformer and describe their functions. Explain what determines how much voltage a transformer produces. Describe how current changes from the primary winding to the secondary winding.
ELECTRICAL THEORY FOR TROUBLESHOOTERS LIBRARY( 7 )
This lesson shows and explains how a basic DC electrical circuit operates and how voltage, current, and resistance behave in a series circuit, a parallel circuit, and a series parallel circuit. Procedures for using Ohm’s Law to calculate voltage, current, and resistance in a circuit are also provided. The first in a seven part series.
This lesson covers the basic characteristics of AC circuits including the relationship between voltage and current flow in an AC circuit, the way in which AC voltage is induced, and the cause and effect of inductance and capacitance in AC circuits. The second in a seven lesson series.
This lesson shows how three-phase AC voltage is generated and describes different characteristics of three-phase voltage. The lesson introduces two types of winding electrical connections with graphic demonstrations of their effect on voltage and current. The third in a seven lesson series.
This lesson presents the basic operating theories of electronic power supplies, half-wave rectifiers, full-wave rectifiers, full-wave bridge rectifiers, capacitive input filters, and inductive input filters. The lesson shows how to calculate the expected DC output voltage for a half-wave rectifier, full-wave rectifier, and full-wave bridge rectifier. The fifth in a seven lesson series.