Walter V. Jones

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The renewed interest in energy has increased the popularity of electrical variable-frequency drives (EVFDs) to power pumps, resulting in significant energy savings versus mechanical means for adjusting the flow of the pumping system. Because of the characteristics of pumps, it is easy to misapply motors in EVFD pump applications. This article will present(More)
Paper machine dryer sect ions create challenges in tuning due to gear backlash. This problem is amplified when older paper machines are upgraded with newer, higher-performance drive systems. The newer drive systems can achieve a much higher degree of control, which can fatigue the mechanical drivetrain. Most often, backlash is experienced during the speed(More)
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