Yung economic electromechanical converter repair during rotor spinning machine when the main tools in addition to the common multimeter, oscilloscope, logic analyzer, signal generator and other auxiliary maintenance equipment, the most important is inseparable from the engineers rich experience in maintenance technology . One common rotor spinning machine inverter maintenance characteristics: inverter voltage space vector / SVPWM based on the three-phase the overall waveform innate effect for conditions, ideal circular rotating magnetic field trajectory Channel Pro motor air gap for the purpose of one born three phase modulation waveform, cut polygon forced Pro-round control. Then improved by practice use, that is, the introduction of the frequency compensation can eliminate the error of speed control; estimation of the magnitude of the flux through feedback to eliminate the impact of low speed stator resistance; the output voltage, current, closed-loop, advances in dynamic accuracy and not arbitrary degree. Rotor spinning machine inverter maintenance control mode: 1, constant torque characteristics: general use curves like straight running conveyor belt, and speed has nothing to do constant torque use spaces; 2, decreasing torque characteristics: like a fan pumps, 2 power relationship between the load and speed were occasions, the use of such curves;, high starting torque: the wiring between the inverter and the motor a longer interval (about 100m), requires startup larger output torque ( lift the load), the inverter input or output AC reactor is inserted, with the motor running less than the maximum combined motor; 4, constant output power operation: the curve of its run at frequencies above 50Hz, 50Hz constant voltage. Yung economic electromechanical rotor spinning machine the converter repair business is built on the basis of mutual trust with our customers, and strive for technical excellence, and has always been safe and reliable products for the repair is completed. Yung economic converter repair customers reliable choice.