Frequency control of asynchronous motor for an irrigation pump of machine irrigation systems

The working state of freguency-operated asinchronous motor irrigation pump in the closed system with feedback by velocity are considered. issue coefficient, provided a constancy given value, loading coefficient for voltage control pro rata freguency determined. Let us consider static mode operation frequency-controlled AM speed feedback. A decrease rotation pumps to regulate their productivity is possible up certain minimum at which head (H) becomes equal (H st ). output (Q) then drops zero. value “k” has been determined, ensures overload factor over entire range frequency change closed-loop on engine speed.