Study On Mechanical-electron-magnetism Co-Simulation Of Electromagnetic Vibrated Seed-Metering Device

Electromagnetic vibrated seed-metering device is the most important part of seeder for rice bud-sowing, its seeding speed can be adjusted and with a lowly injury rate of seeds, its seeding performance has a direct impactact on the performance of the rice bud planter. At present, the Electromagnetic vibration metering device being studied by mathematical analysis methodsphysical test methods and dynamics simulation method in the country. However, the affect of the exciting force waveform received from solenoid inductance and circuit system of electromagnetic can not be considered in these methods,but electro-magnetic exciting force waveform changes affect performance of the seed metering device obviously.Therefore,Studing on mechanical-electron-magneti-sm co-simulation of electromagnetic vibrated seed-metering device having important practical significance for improving the performance of the metering device, it will promote the application and promotion of rice bud planter.In the study,the seed metering system mechanical-electron-magnetism co-simulation model and the seed metering-seeds dynamics simulation visualization model is built by the way of electromagnetic co-simulation method. And the two models is validated by physical experiment. The impact of circuit and inductors on the exciting force waveform and the impact is studied based on the simulation model, The impact of vibration force changes on the working performance of the metering device is also on the base of simulation model.Using simulation experiment method, the electromagnetic parameters of electromagnetic vibration is optimized, the optimization result is validated.The result shows that the electromagnet inductance and circuit system have a great impact on exciting force waveform changes; And the number of coil turns, the transistor models,the duty cycle of the PWM control signal waveform also have a greater affected on the changes of electromagnetic exciting force waveform; The exciting force waveform has a great affect on working performance of metering device, when the exciting force waveform is square wave, the seed metering device performance is better, when the exciting force waveform is falling sawtooth, the seed metering device performance is poorer. Results for electromagnetic parameters optimization of the metering device are as follows: Circuit system uses composite pipe that composed of2N5401and2N3055and be connectedon the common collector; The number of turns is110. After the optimization, the average removal rate of seed metering device increased9.2%, the seed plate horizontal rows of speeds inconsistency coefficient of variation reduced27.07%, which are under the combination of circuit system and the number of turns.