Editing Motor controller (section)

{{Short description|Device for regulating the performance of a motor}}
A '''motor controller ''' is a device or group of devices that can coordinate in a predetermined manner the performance of an [[electric motor]].<ref name=NEC100>{{Cite book | author=National Fire Protection Association | title= NFPA 70 National Electrical Code | access-date=2008-01-15 | year=2008 | publisher=NFPA | location=1 Batterymarch Park, Quincy, Massachusetts 02169 |pages=24 | chapter=Article 100 Definitions | chapter-url=http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=70&cookie%5Ftest=1}}</ref> A motor controller might include a manual or automatic means for starting and stopping the motor, selecting forward or reverse rotation, selecting and regulating the speed, regulating or limiting the torque, and protecting against overloads and electrical faults. Motor controllers may use electromechanical switching, or may use power electronics devices to regulate the speed and direction of a motor.