An intelligent control system was developed for the motor driven hose reel irrigator, for the purpose of improving the irrigator′s hydraulic performance, energy use efficiency, as well as realizing the automatic speed control of sprinkler cart, which would be a headache under water turbine driven system. The developed control system employed a high efficiency solar energy powered Brushless DC Motor(BLDCM)to drive the reel. A control system based on the single chip microcomputer MSP430F169 was developed to control the DC motor and detect the system status as well. The control system mainly consists of the solar charge controller, the BLDCM controller, the isolated power mo-dule, the motor voltage and current detect module, the battery capacity detect module, motor speed detect module, the reel speed and rotating layer detect module, and the microcomputer module. The solutions of each function module were described in detail, which combined to realize the automatic speed control of the sprinkler carriage and the operational parameters detection of the hose reel irrigator. The field test shows that this intelligent drive control system operates stable and the sprinkler car-riage can be drawn back in a set speed constantly. This proposed system is an effective fundamental technique for the variable rate irrigation research of hose reel irrigators.
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