| 摘要 |
PURPOSE: To provide a power supply device compatible with 110V/220V which, when a power voltage is 110V AC, generates a DC current corresponding to 220V so as to impress it on a universal motor when, and the AC power is 220V, supplies it as it is. CONSTITUTION: This device is made up of five parts, applied voltage detecting part 1 which detects the root-mean-square value of an AC voltage applied, a power detecting part 2 which divides the detected voltage at an appropriate ratio and amplifies it via a multiplier, a distribution voltage rectifying part 3 which, when an AC power of 110V is supplied, can extract a DC output voltage to be governed by this power, a DC-AC power switching part 4 which outputs a specified voltage by operating a relay, and a power control part 5 which controls the voltage to a target specified power, based on the output voltage of the power detecting part 2. |
