Robert Pfaff, P.E.

Robert Pfaff is a licensed P.E. and has been working for SmithGroup in the Washington, D.C., office for the past 14 years. He earned a bachelor’s degree in electrical engineering from The Catholic University of America in 1987. He has more than 25 years of experience in electrical engineering design focusing on health care facilities, commercial buildings, laboratories, government facilities, and museums. Contact him at robert.pfaff@smithgroup.com.

The Inclusive Job of Replacing Aging Chilled Water Systems

Phasing, harmonics, and controls are just a few of the design items that need to be considered early in the design process.

August 18, 2022

Phasing, harmonics, and controls are just a few of the design items that need to be considered early in the design process.

Motor Control Techniques: VFDs, ECMs, and More, Part 2

Robert Pfaff, P.E. Patrice Mulhern, P.E.

Kevin Ricart, P.E.

June 19, 2020

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An in-depth look at induction motors with voltage/frequency-controlled VFDs, induction motors with vector-controlled VFDs, and electronically commutated motors.

Motor Control Techniques: VFDs, ECMs, and More, Part 1

An in-depth look at induction motors with voltage/frequency controlled variable frequency drives, induction motors with vector-controlled VFDs, and electronically commutated motors.

Kevin Ricart, P.E. Patrice Mulhern, P.E.

Robert Pfaff, P.E.

May 28, 2020

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The topic of motors and motor control techniques is wide and varied. Part one of this two-part article will cover the principles of alternating-current (AC) motor operation and control.

Robert Pfaff, P.E.

ARTICLES

The Inclusive Job of Replacing Aging Chilled Water Systems

Motor Control Techniques: VFDs, ECMs, and More, Part 2

Motor Control Techniques: VFDs, ECMs, and More, Part 1

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