Yung economic electromechanical DC governor during packaging molding machine maintenance 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 . A common packaging machine DC governor maintenance features: governor voltage space vector / SVPWM overall innate effect of the three-phase waveforms conditions for the purpose, once born, to the ideal circular rotating field trajectory Channel Pro motor air gap , three-phase modulated waveform to 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. Second, the packaging molding machine DC governor maintenance control modes: constant torque characteristics: general purpose use curve, constant torque speed independent sites like straight running conveyor belt; 2, decreasing the torque characteristics: like a fan pumps, 2 power relationship between the load and speed were occasions, the use of such curves;, high starting torque: between the governor and the motor wiring interval is longer (about 100m), requires startup output torque (lift the load), the governor of the 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. DC governor Yung economic electromechanical packaging machine 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 maintenance of the governor, is the choice of customers trusted.