| 摘要 |
PROBLEM TO BE SOLVED: To provide a brushless motor controller which can realize wide-angle power feeding at high efficiency and low vibration and noise, without the use of a magnetism detecting means, such as Hall element for detecting the rotating position of a rotor in the brushless motor. SOLUTION: This brushless motor controller is constructed to determine a motor speed, an index of power feeding coefficient so as to determine the power feeding coefficient during a pulse width modulation period and the start timing and the end timing of the cut-off period, depending on the DC power source voltage. |
