Hardware And Software Research On Digital Control Of ISA In 42V Powernet In Vehicle

In this dissertation digital control system of ISA/ISG(Integrated Starter Alternator/Generator) in 42V powernet is detailedly studied.This dissertation first shows 42V powernet's background ,then introduces the core set of 42V powernet-ISA/ISG system and its research status.The goal of research on 42V powernet is ISA system in which current starter and alternator are replaced with just a motor. This dissertation makes detailed research on the hardware of ISA system,analyzes the choice design of power module,motor,main capacitance,absorb circuit,CPU and etc. and designs ISA controller based on TI's LF2407A DSP.As the base of research on ISA's digital control system,this dissertation introduces induction motor's SVPWM arithmetic,then designs control system of induction motor using SVPWM arithmetic and VVVF principle,which proves the correctness of SVPWM's realization based on DSP.To enhance ISA system's static and dynamic performance, design of torque,magnetic flux and speed adjuster in Field Orientated Control(FOC) is detailedly analyzcd,then corresponding software is studied.