The dissertation designed and built is intended to test the inverter brand Schneider version ATV312H075M2 coordinates input voltage is 220-240 v. By the user and the inverter used in driving the induction motor with size with the coordinates of inverter can be controlled. The study of property changes in the condition without rotating drive load conditions of rotating drive load drive ดีซีเจ inner evaporator, the condition to drive Bowers fan. And the conditions to drive water pump The test results will save in the form of data within the table and leaves the show as a graph to compared changes of voltage to frequency The input current and the input voltage, output voltage, output and. Power input and output, the speed of the motor torque of the motor, and the efficiency of the motor.
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