Study of Three-level Double-PWM Converter in Hoist Based on Neural Networks

In order to solve the control of disorders of the motor parameters change,using neural networks in control and identification of the superiority of non-linear,complex and uncertain system,improving the performance of vector control system.High-power as mining equipment,hoist,running in the high-voltage high-power,and often start,stop,and from the variable-speed operation,the threelevel back-to-back control strategy can reduce the output harmonic content,improve the power factor.This control strategy in the complex environment of the scene,can ensure the stability and efficient operation,with a very large significance and great application value.