Patent ID: 7242562

Claim:
A fan protection method for protecting a fan when said fan is locked, said method using a first counter for counting a first stopping number and a second counter for counting a second stopping number, said method comprising steps of: stopping transferring a drive signal to said fan to stop said fan for a first time period; determining whether or not a number of stops is equal to the first stopping number counted by the first counter: restarting said fan when said number of stops is not equal to said first stopping number wherein said drive signal is transferred to said fan again to restart said fan; stopping transferring said drive signal to said fan to stop said fan for a second time period when said number of stops is equal to said first stopping number or repeating above steps when said number of stops is not equal to said first stopping number; restarting said fan, wherein said drive signal is transferred to said fan again to restart said fan; determining whether or not the number of stops is equal to the second stopping number counted by the second counter; cutting off power without restoring power thereafter to said fan when said number of stops is equal to said second stopping number; and repeating the above steps when said number of stops is not equal to said second stopping number.