A Practical Primer On Motor Drives (Part 4): Single-Phase AC Line Current
by Ken Johnson, Teledyne LeCroy, Chestnut Ridge, N.Y., How2Power Today, May 16 2016
Focus:
This broad overview on motor drives continues in part 4 with a discussion on the measurement of
ac line currents. Concepts such as wye (star) and delta connections in three-phase systems and
utility requirements for THD are briefly discussed. Then the basic concepts of ac line currents
and measuring current in single-phase ac systems are explained. Measurements demonstrate the
impact of linear (resistive) and nonlinear loads on the current-versus-voltage relationship.
What you’ll learn:
- How to measure ac currents in single-phase systems using oscilloscopes
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