Some sugar factories use steel turbine to drive shredders, sugarcane feeders and millings, as above mentioned this technology is old and outmoded. There are many disadvantages. With the development of VFD and asynchronous motor technology, more and more sugar factories start using VFDs driving these loads.
With today’s VFD technology, those pumps can be efficiently controlled and will not compromise its reliability. Furthermore, mechanical mainte¬nance costs can be reduced by controlling the water flow with VFDs instead of throttling valves or hydraulic couplings.
VFDs provide accurate torque and speed control of conveyors. This reduces the stress on mechanical equipment such as gearboxes, pulley and belts, especially during start-up and stopping, as well as during operation and maintenance.
Through this paper introducing INVT LV(Low Voltage) and MV(Medium Voltage) VFDs and rated solutions applied to different loads in details in the sugar industry to illustrate the economy and practicality by using VFD.
INVT Goodrive5000 medium voltage VFD applied to sugar mill house mill presser in Pakistan, especially to illustrate many benefits of VFD and AC motor system instead of steam turbine system. Which is an important technical improvement and use VFD and AC motor is good for production automation and decrease user cost of production.
In this paper，through introducing INVT GD5000 medium voltage inverter applied to Jet condenser for Vacuum Pan in the sugar factory in the Thailand, to illustrate VFD transformation of the feasibility and the significant energy saving.