Method of controlling surge current in fan modules and apparatus thereof

摘要

A method of controlling surge current in fan modules is applied in a blade server. The blade server includes a fan module having a first fan motor, a second fan motor, a first resistor/capacitor (RC) circuit and a second RC circuit. The blade server generates a control signal for controlling the first and the second fan motors. The first RC circuit receives and delays the control signal for a period of first time to output a first delay control signal for driving the first fan motor. The second RC circuit receives and delays the control signal for a period of second time to output a second delay control signal for driving the second fan motor. The first time is different from the second time and thus the first surge current in the first fan motor and the second surge current in the second fan motor are generated at different time.