Discussion
True or false: a drive with poor speed regulation is necessarily unsatisfactory.
Answer: B
Correct answer: False, since many loads do not care what speed they run at
Regulation matters where the speed itself is the controlled quantity - a machine tool, a paper machine, a winder. A fan or a pump whose duty is a flow rate is quite indifferent to a per cent or two of droop, and specifying a closed-loop drive for it buys a property nobody needs.
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