The invention relates to a mechanical and electrical integrated photovoltaic direct-current high-power
submersible pump which comprises a
submersible pump, a direct-current motor, a
solar power supply component and a controller, wherein an upper end of a shell of the direct-current motor is fixedly connected with a lower end of a pump body; the upper end of a rotor shaft of the direct-current motor is connected with the lower end of a pump shaft through a coupler; the controller and the output end of the
solar power supply component are connected with an input cable of the direct-current motor; and the controller is connected with a
water level sensor. The controller is utilized to realize the automatic over-current protection for the direct-current motor, the maximum power tracking for the
solar power supply component, the rotating speed abnormal protection for the motor, the dry striking protection for the water pump, the double-water-level detection and automatic stopping and the prevention for the backwater restarting of the pipeline. The motor has a permanent magnetic brushless position-sensor-free structure; after a
stator and a rotor are respectively subjected to plastic
package, the
water flow is utilized to realize cooling; a
graphite bearing is used for realizing water
lubrication, so that the heating problem is solved; and the mechanical and electrical integrated photovoltaic direct-current high-power
submersible pump has the advantages of high power of the motor, no
noise, full
automation, high reliability, excellent suitability of supplied
water volume for
evaporation capacity, high flow,
high lift and all-weather unattended running.