The Research And Realization On Driven System Of Interor Permanent Magnet Synchronous Motor

In recent years, as the new permanent magnetic materials emerging and itsperformance improving, and the rapid development of power electronic devices aswell as modern control theory algorithms become more sophisticated, making thedevelopment and application of permanent magnet synchronous motor (PMSM)systementered a new stage. In this context, the trend of the using of permanent magnetsynchronous motor especial the interior permanent magnet synchronous motor(IPMSM) with stronger expansion speed capacity as the electric vehicle core power tosolve the problem of auto industry on environmental pollution is growing; so studyingthe high-performance interior permanent magnet synchronous motor drive system hassignificance theoretical and practical value.Firstly, the paper analyzes the current status and development trends of thepermanent magnet synchronous motor control, coordinate transformation and vectorcontrol principle, and derives the permanent magnet synchronous motor mathematicalmodel, and on this basis, it highlights the interior permanent magnet synchronousmotor the principle of the field weakening speed control method, and analyzes theadvantages and disadvantages of every field weakening control.Secondly, for the special requirements of the motor drive system wide speed insome cases, the paper researchs the the lead angle weakening control strategy, andtheoretically analyzed the system parameters which effect the field weakening controlperformance; by constructing an additional voltage index outer loop, and thendetecting the inverter DC bus voltage utilization, so that the motor achieves the statorcurrent reasonable allocated successfully in the field weakening mode. The simulationresults show that the field weakening switch of the field weakening control strategy issmooth and it has strong ability of field weakening expanding speed.In addition, the paper researchs the fuzzy PID control scheme of the speed loop,and compared with traditional PID control, the simulation results show that the fuzzyPID control system has fast response speed, small overshoot, strong anti-interferenceability, and within a wide speed range the control parameters has self-adaptability, itis moer suitable for complex operating conditions.Finally, the paper analyzes the experimental system software design scheme andits related processes, and combines the lead angle field weakening control and themaximum torque control to the current control(MTPA) effectively, and then applies this control scheme in the control system based on the TMS320f2812controller chips;in different load conditions, the paper carry on the experiments of dynamic response,anti load disturbances and field weakening speed performance, the experimentalresults analysis shows that this control strategy has theoretical validity and industrialapplications.