Mathematical Model And Automatic Voltage Regulator Design Of Brushless Multiphase Generator With Rectification Output On-Board Vehicle

With the improvement of electrification and the increment of on-board automation equipment,special vehicles have more requirements on power capacity and power density.Due to simple structure,high operational reliability,and small DC output voltage ripple,Brushless Multiphase Generator with Rectification Output(BMRG)can meet this ever-changing requirement.This thesis focuses on a type of claw-pole brushless six-phase synchronous generator with rectification output on-board vehicle,its mathematical model,various types of stator winding and automatic voltage regulator(AVR)are studied in deepth.Main contents are as follows:(1)Structure and operation principle of BMRG are discussed.(2)Taking rushless six-phase rectifier generator with double Y-connection,phase shift 30° between each other and independent neutral point stator windings as an example,various operation modes including switching and commutation processes are analyzed,and a switching mathematical model of BMRG for analyzing distortion and DC pulsation is established based on operation mode classification.In order to facilitate design of its AVR,average-value model of BMRG is also established.(3)Based on analysis of inductance parameters and operation modes,distortion and DC pulsation of brushless six-phase generators with rectification output using different types of stator windings are investigated according to their switching models,so as to lay a theoretical foundation for selecting type of stator windings.(4)Digital AVR and its control algorithm are designed based on average-value model of BMRG.Also CAN communication scheme between generator and main controller is discussed.(5)Prototype is designed and manufactured using Dspic30F4011.Effectiveness and performances of digital AVR and CAN communication are verified in simulation and experiment.