| 摘要 |
<p>A control device for controlling a motor (M) in a low voltage DC power tool and a control method thereof. The control device comprises: a switch unit (V1), coupling to the motor (M), and operative to adjust an input voltage of the motor (M) so as to implement a variable-speed function of the low voltage DC power tool; a driving voltage control unit (E1), coupling to the switch unit (V1), and operative to control the provision of a driving voltage (U2) to the switch unit (V1); and a driving voltage boost up unit (E2), coupling to the driving voltage control unit (E1), and operative to boost up the driving voltage (U2) of the switch unit (V1) when the driving voltage boost up unit (E2) detects that the driving voltage (U2) decreases below a desired level, wherein the driving voltage (U2) is provided from the driving voltage boost up unit (E2) to the switch unit (V1) via the driving voltage control unit (E1).</p> |
