Alternating current to direct current controlled spraying system and dust suppression vehicle

The utility model relates to an alternating-current-to-direct-current controlled spraying system and a dust suppression vehicle. The spraying system comprises a generator set, a spraying device, a power converter and a motor controller. The spraying device comprises a spraying machine, the spraying machine comprises a fan, and the spraying device is used for spraying on the road surface through the spraying machine; the generator set is connected with the fan through the power converter, and the power converter is used for converting alternating current of the generator set into direct current; the power converter is connected with the fan through the motor controller, and the motor controller is used for adjusting the frequency of the direct current converted by the power converter, then converting the direct current into alternating current and outputting the alternating current to the fan so as to adjust the rotating speed of the fan. According to the technical scheme, a three-phase frequency converter is