We producing industrial steam boilers. We also produce snail fans for our boilers. The problem is our fan blades are a little bit heavy for our motors until blades get warm. "We can't use more powerfull motors cause of energy saving." We control our fan motors via drivers and our fan blades takes several days to get warm. During this period, there is a risk that the engine may burn out(cause of high current). Our motor’s pulley diameter is 30cm and fan’s pulley diameter is 30cm. If we change our fan’s pulley diameter like 25–27cm, is 110 kw motor will high current or will it be same ? Also if we change the fan's pulley as 25cm, we'll limit motor speed to avoid fan's over rpm. So, can we avoid high current with decreasing fan's pully diameter ?