Research On Permanent Magnet Synchronous Motor Drive System Of Hybrid Electric Car

Permanent magnet synchronous motor because of its small size, light weight, high efficiency, high power density, high torque utilization coefficient, good speed regulation performance as well as the advantages of good reliability become the mainstream of hybrid electric vehicle drive motor selection, a excellent permanent magnet synchronous motor drive system can realize the mechanical and electrical integration and integration, It has a simple structure and convenient operation, and can realize the recovery of braking energy, save energy and reduce emissions, its system response time is short, the advantages of accurate torque control, In short, it can improve the performance of the vehicle. Therefore, Hybrid electric vehicle research of permanent magnet synchronous motor drive systems has a high practical value.Hybrid vehicle permanent magnet synchronous motor drive system connected to battery and motor, this article selects permanent magnet synchronous motor as vehicle drive motor, permanent magnet synchronous motor in rotor structure is divided into built-in and surface type, the built-in permanent magnet synchronous motor is more suitable for high speed running, there is no the question of permanent magnet fly out, the built-in permanent magnet synchronous motor direct axis inductance is less than the quadrate axis inductance, and permanent magnet synchronous motor of the surface type direct axis inductance and the quadrate axis inductance is equal, so the built-in permanent magnet synchronous motor can make good use of the magnetic resistance torque, which can improve the output torque, at the same time can improve the ability of weak magnetic expansion speed, so from the point of view of parameters is also built-in permanent magnet synchronous motor is more suitable for hybrid electric vehicle, therefore this article selects the built-in permanent magnet synchronous motor as a hybrid drive motor.The research on permanent magnet synchronous motor drive system of hybrid electric vehicle is the study of motor control technology, so the permanent magnet synchronous motor drive system uses vector control technology in this paper. Vector control technology mainly includes the link of vector transformation, the link of speed regulation and the link of vector control, the vector control link consists of two parts, namely the motor under rated speed and above rated speed, in the two parts need to adopt different control strategies, the motor in the rated speed above need to use weak magnetic control, the link of weak magnetic control algorithm and whether into the weak magnetic link judgment conditions are weak magnetic control difficulty.The article adopts the vector control strategy in permanent magnet synchronous motor drivesystem,inthisarticle,throughin-depthanalysisoftheprincipleofthevectorcontrolstrategy,findthedeficiencyofthetraditionalvectorcontrol,therefore,fromtheperspectiveofimprovingoutputtorqueandspeedrange,thispaperproposestheimprovedvectorcontrolstrategy,underratedspeedadoptthemaximumtorqueperamperecontrol,abovetheratedspeedvoltageadoptthemaximumtorquepervoltcontrol,ifmotorgointoweakmagneticareathroughtheexpectationofthestatorvoltageamplitudecomparingwiththeinvertervaluetojudge,andjoinedthevoltagefeed-forwardcompensationcontrolstrategyinthelink,simulationandexperimentverifiedthevectorcontrolstrategyadoptedinthispapercanachievegoodcontrolperformance.inthispaper,thedesignofvehiclemotordrivesystemincludehardwaredesignandsoftwaredesign,thehardwaredesignmainlyincludestheminimumsystembasedontms320f2812,ipminverter,speeddetectioncircuitandthecurrentdetectioncircuit,softwaredesignmainlyincludesthemotordrivesystemofthemainprogramflowchart,theinterruptsubroutineflowchartandprogramflowchartofsvpwmproduce.attheendofthepaperhassetupahardwareplatformforthedrivesystem,theperformanceofthedrivesystemisverifiedbyexperiment...