Variable Speed Drives

Control of electric motors by simple on/off switchgear covers a wide spectrum of applications for machine drives. However, this method brings about certain constraints which can prove to be awkward for certain applications, namely: Constant speed operation The current peak during starting can disturb other equipment connected to the supplyParker SSD 650 series Sudden mechanical jerks during starting can be unacceptable for certain machines, or for the comfort and safety of the users