Variable frequency drives (VFD) are systems for controlling the rotational speed of an alternating current (AC) electric motosr by controlling the frequency (hertz or cycles) of the power supply to the electric motor. A variable frequency drive is a specific type of adjustable speed drive. Variable frequency drives are also known as variable speed drives or inverter drives. Variable frequency drives are widely used in the wood products industry. Exmples of use are:
Sawmill: A variable frequency drive is used to control the variable feed speed of a debarker, canter, gang edger, board edger, resaw, lumber sorter, lumber stacker, chipper, conveyor, transfer, log deck, log feeder, step feeder, fan, etc. Variable frequency drives ar also used to control debarker rotor, chipping head and bandmill wheel rotational speed.
Planermill: A variable frequency drive is used to control the variable feed speed of a planer, molder, lumber sorter, lumber stacker, chipper, conveyor, transfer, fan, etc. Variable frequency drives are also used to control planer and molder head rotational speeds.
Plywood Plant: A variable frequency drive is used to control the variable feed speed of a debarker, lathe, clipper, dryer feeder, veneer stacker, panel stacker, chipper, conveyor, transfer, log deck, log feeder, step feeder, fan, etc. Variable frequency drives are also used to control the rotational speed of lathes and veneer clippers.
OSB Plant: A variable frequency drive is used to control the variable feed speed of a debarker, strander, press, panel stacker, conveyor, transfer, log deck, log feeder, step feeder, fan, etc. Variable frequency drives are also used to control debarker and strander rotational speeds.
MDF Plant: A variable frequency drive is used to control the variable feed speed of a debarker, press, panel stacker, conveyor, transfer, log deck, log feeder, step feeder, fan, etc.
Pulp and Paper Mill: A variable frequency drive is used to control the variable feed speed of a debarker, chipper, pump, paper machine, conveyor, transfer, log deck, log feeder, step feeder, fan, etc. Variable frequency drives ar also used to control paper winder rotational speed and torque.
English Terminology: Variable fequency drives, variable speed drive, inverter drives, speed control, sawmill, planer mill, plywood plant, oriented strand board, medium density fibre board, pulp, paper, wet mill, dry mill.
