Research On The Interior Permanent Magnet Synchronous Motor Control System

With the demand for industrial automation technology, AC servo drive technology hasmade great progress. In recent years, magnetic materials, semiconductor, electroniccomponents and power microprocessor chip has revolutionary technological advances.Permanent magnet motor in the industry has demonstrated its competitive advantage. Theinterior permanent magnet synchronous motor has much advantage, e.g. high power density,low noise, high reliability, low maintenance and so on. This article researches the interiorpermanent magnet synchronous motor control system.In this thesis, there is an overview about the body of the permanent magnet motor andcontrol system. The interior permanent magnet synchronous motor performance advantagesand the permanent magnet motor control strategies are described. Then the transformationbetween the3-phase stationary ABC coordinate system, two-phase stationary αβ0coordinate system and rotating dq0coordinate system is introduced. Using the abovetransformation, the interior permanent magnet synchronous motor equation andmathematical model in the rotating dq0coordinate system are got. The space voltage pulsewidth modulation (SVPWM) technique and the over-modulation technique are analyzed indetails. The interior permanent magnet synchronous motor control strategy is summarized.The IPMSM MTPA control formula and the MTPA curve asymptote are researched. Theeffect of the motor parameters on the flux control performance is studied. The thesisanalyzed the current loop and velocity loop PI tuning. A new flux-weakening controltechnology was proposed. The system hardware and software design and PC programdesign are introduced. The experiments verified the proposed control strategy.