Items Tagged with 'drives'

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Footnote 4

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
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.  


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Kitchen Ventilation: Considerations in K-12 Schools

Properly Engineering a K-12 Kitchen Ventilation System

A number of factors, including budget and the lifespan of the building, will influence the ultimate outcome in a K-12 kitchen ventilation project.
Jacob Moberg, P.E., CEM, LEED AP BD+C
April 22, 2019
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When designing a kitchen ventilation system, there are a number of factors that should be considered, such as project budget, building layout, surrounding buildings, system maintenance, operational cost, fire risk from grease buildup, and more.


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