TY - JOUR N2 - The Variable Frequency Drive (VFD) is used to control the speed of the pumpmotor to attain the desired flow rate and fluid level in a fluid system. An AC drive provides efficient flow control by varying the pump-motor speed. The comparison of energy requirements and costs in a system where a throttling device is used for flow control on a centrifugal pump with the power used when an variable frequency drive (VFD) is used to control the same flow, evidently shows potential savings. In this system, AC Motor Frequency drive and static pressure transmitter, turbine type flowmeter and Analog/Digital cards, micro-control unit and computer connection are designed specially to control flow rate, fluid flow type (turbulence or laminar) and water level at the different conditions with different PID parameters. L1 - http://www.czasopisma.pan.pl/Content/107417/PDF/157.pdf L2 - http://www.czasopisma.pan.pl/Content/107417 PY - 2010 IS - No 4 EP - 404 DO - 10.2478/v10180-010-0022-y KW - Variable Frequency Drive flow control KW - PID KW - micro control unit A1 - Gürbüz, Riza PB - Polish Academy of Sciences, Committee on Machine Building VL - vol. 57 DA - 2011.01.17 T1 - Controlling flow rate and fluid level by Variable Frequency Drive unit SP - 393 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/107417 T2 - Archive of Mechanical Engineering ER -