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Motor controller
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=== Adjustable-speed drives === {{Main| Adjustable-speed drive}} An ''adjustable-speed drive'' (ASD) or ''variable-speed drive'' (VSD) is an interconnected combination of equipment that provides a means of driving and adjusting the operating speed of a mechanical load. An electrical adjustable-speed drive consists of an electric motor and a speed controller or power converter plus auxiliary devices and equipment. In common usage, the term "drive" is often applied to just the controller.<ref name=NEC430 /><ref name=Campbell /> Most modern ASDs and VSDs can also implement soft motor starting.<ref>{{Cite web |url=http://machinedesign.com/engineering-essentials/soft-starters|title= Soft Starting |date= 16 July 2014 |publisher=machinedesign.com}}</ref> {{Further|FAM control of induction motor}}
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