Transcription of VD - Marathon Electric
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VD - Marathon Electric
VD SeriesVariable speed MotorsTotally Enclosed Fan CooledLow Voltage Ac Cage induction MotorsVDMotors for the Long Run!A REGAL-BELOIT COMPANYMARATHON Electric introduces VD series motorstailor made for inverter drives having enhanceddielectric strength and adequate thermal margin suitablefor variable speed technology involving high switching frequencyIGBT drive has enabled AC induction motors to beoperated as variable speed drives. However, therehad been a documented increase of premature windingfailure for standard general purpose motors whenoperated with inverter and steep front voltage spikes (dV/dT) producedby latest generation IGBT drives associated with thephenomenon of voltage wave reflection due to longercable length imposes stress on the motor windingresulting rapid ageing and deterioration of rating for Variable speed motors need to beselected based on following aspects-lHeating due to harmonic content of ventilation due to low speed torque/Constant Power/ Variable torquerequirement of limiting factors eg.
VD Series Variable Speed Motors Totally Enclosed Fan Cooled Low Voltage Ac Cage Induction Motors VD Motors for the Long Run! A REGAL-BELOIT COMPANY
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