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E219
Single to Three Phase Conversion Circuit

Carlo DeLuca, PE, MBA

A brief description of the development of three phase power is presented. Diagrams of “wye” and “delta” configurations are shown with technical explanations of each. Classic terminology of Alternating Current voltages is reviewed with references to notation and development of angles related to sinusoidal waves and their relationship to frequency and time. A diagram of waveforms for three phase power is presented, illustrating the concept of phase lag for the three waveforms and the advantages of three phase power in motor and direct current applications. Basic theories of transformers and capacitors are discussed and applied to the subject circuit.

The circuit is described with diagrams and explanations involving the use of phasors in the summation of voltages which produce three phase power from a single phase input. The reader is cautioned on the limitations of the use of the theoretical circuit and some constraints to be recognized.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.


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NY PE & PLS: You must choose courses that are technical in nature or related to matters of laws and ethics contributing to the health and welfare of the public. NY Board does not accept courses related to office management, risk management, leadership, marketing, accounting, financial planning, real estate, and basic CAD. Specific course topics that are on the borderline and are not acceptable by the NY Board have been noted under the course description on our website.

AIA Members: You must take the courses listed under the category "AIA/CES Registered Courses" if you want us to report your Learning Units (LUs) to AIA/CES. If you take courses not registered with AIA/CES, you need to report the earned Learning Units (not qualified for HSW credits) using Self Report Form provided by AIA/CES.

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