6. Control Functions and Parameter Settings6-726-6 Application to square low variable torque load6-6-1 Specifications for square low variable torque loadA load having characteristics in which the load torque varies with the speed, as a fan or pump, is called asquare law variable torque load. The torque curves of the constant torque load and square torque loadare shown below.CAUTIONThe variable torque specifications must be applied to square variable loads such as fans and pumps.The constant torque specifications must be applied for all other types of loads.S p e edTorqu e(fa n , p u m p)C o n stan t to rqu e lo a dS q u are la w v a ria ble to rq ue loa dTorque curveThe specifications for both constant torque load and square law variable torque load are shown inAppendix 1. Hereafter, the square law variable torque load characteristics will be called the variabletorque.
