Research And Design On High-voltage Asynchronous Motor Soft-starter Controller

Asynchronous motor is widely used in industrial production and become the main power equipment,due to the advantages of simple structure,low cost,reliable operation.But huge starting current will bring influence and damage to motor itself and the power network if the motor is started directly with full voltage.Traditional start methods can't satisfied the demand of industrial production development because it has limitations.In this context,research on high-voltage asynchronous motor soft-start controllers is significant.In order to solve the problem mentioned above,in this thesis,magnetically soft-starter controller based on the control chip TMS320F28335 is designed.First,the thesis describes the background,significance,research status and common start mode of the soft-starter control system.Second,This thesis introduces the working principle of magnetically controlled soft-starter controller in detail.Third,this thesis designs the overall program of the controller with the PID control algorithm.Fourth,this thesis introduces the hardware and software design in detail.In the hardware part,the thesis introduces the power supply,synchronous signal detection,sampling,pulse triggering,switch,data storage and communication.In the part of software design,the thesis introduces the main program design,model selection,triggering,fault protection,analog testing,data storage,communication and so on.At last,with the experimental platform,the performance of the controller is tested.This thesis compares the current waveform during the soft-start and direct-start and verifies the reliability and stability of the controller.The soft-start controller has been running in industry.