A Vibratory separator is a kind of high-precision widely used screening equipment. But the vibratory separator in the process of use often appears voltage instability and high precision. Fuzzy PID composite control is a control method that combines fuzzy technology with conventional PID control algorithms. We put forward an improved control method, mainly because the fuzzy controller itself to eliminate the system steady-state error performance of the shaker device is poor, so it is difficult to achieve a higher control precision. The integral adjustment function of the PID controller can theoretically control the steady-state error of the system to zero, which has a good effect on eliminating the error. Fuzzy control and PID controller are used to improve the steady-state performance of the system.
However, the classifier is small and has good performance. At the same time, it also brings more disadvantages to the control system of the system, making debugging more difficult, and the real-time control system is difficult to meet the requirements. Vibratory separator points control device adopts different control methods, in different control domains to achieve points control, according to switching logic to choose one of them, that is, fuzzy control within the range of large deviation, PID control within the range of small deviation, that is, to achieve a switching function.
In practice, the voltage space vector pulse-width modulation of the shaker corresponds to the switching trigger sequence and pulse-width combination of PMSM in the three-phase voltage source inverter. The control method can produce sinusoidal current with waveform distortion difference up to 120 in a specific coil.
The space vector in the pulse-width modulated gyro screen has a sinusoidal space distribution at every fixed position and is a sinusoidal space vector varying with time. Thus, the problem of circular magnetic field can be transformed into the problem of voltage space vector control.
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