| 摘要 |
An air blower (10) equipped with a brushless DC motor (11) is provided with an inverter circuit (4), a drive logic control unit (5), a duty instruction unit (6), a motor voltage detection unit (13), a motor current detection unit (12), and a correlation detection unit (14). Duty instruction values of the duty instruction unit (6) are determined by the values of the correlation detection unit (14). |
