| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-phase DC brushless motor drive which can achieve stabilized motor driving, even in a case of rotor position detection by means of a single Hall element.SOLUTION: The motor drive including a single Hall element 10 as rotor position detection means, and having a function for determining the excitation pattern of an exciting coil on the basis of a rotor position detection signal from the Hall element 10 is further provided with a function for varying the Duty width of a PWM signal for motor driving by calculating the number of revolution of the motor on the basis of the rotor position detection signal from the Hall element 10, and feeding back the number of revolution of the motor every prescribed time, and is configured to change the feedback time of the number of revolution of the motor according thereto. |
