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Variable Speed Fan Drive Assembly
1962Abstract : This report covers designing, building and testing of a variable speed fan drive. Speed control automatic from 0 to approximately 4900 rpm governed by engine coolant temperature. Unit includes a fail safe device which operates the fan at maximum speed in the event of a control failure.
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Solid-State Variable Speed Drives
1986The past two decades have seen rapid growth in the availability and usage of solid-state variable speed drives. Today there is a profusion of types that are suitable for virtually every type of electrical machine from the sub-fractional to the multi-thousand horsepower rating. (See Fig.
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Electrical variable-speed drives
IEE Proceedings A Physical Science, Measurement and Instrumentation, Management and Education, Reviews, 1984B.L. Jones, J.E. Brown
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Online variable speed drive machine monitoring
2020Electrical machines in VSDs have been reported to be less reliable than those fed direct -on-line from the grid mains, see Montanan. This is because the voltage supply imposes extra stresses when synthesised by a power electronic converter. Our focus here is on drive systems using voltage source converters (VSC) where the DC link is capacitively ...
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Saving energy with variable speed drives
World Pumps, 2008Using a variable speed drive is one of the most effective ways to save energy, argues ABB's Jukka Tolvanen. While other energy-saving methods may shave singular percentage points off the overall consumption, a variable speed drive frequently can save 50% or more of the energy in applications that use pumps and fans.
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Ground Fault Detection Method for Variable Speed Drives
IEEE Transactions on Industry Applications, 2021José Manuel Guerrero +2 more
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