Power-efficient torque control of the wound rotor synchronous machine (WRSM) below base speed requires a minimization of electrical losses, namely, copper losses. In this article, the maximum torque per ampere (MTPA) optimization problem is presented and solved using a convex Pareto frontier of the simulated or measured data points. Three filtered solution sets are mapped to current space using piecewise affine (PWA) functions, which approximate the current using a piecewise linear function for a given torque. This set of piecewise linear functions enables a machine controller to implement MTPA online or as an offline lookup table. Simulated and experimental results are presented for a 65-kW, finite element analysis (FEA)-sampled WRSM. Compared with linear MTPA, the PWA MTPA functions are shown to reduce the torque error by >25% and reduce the average copper loss by >20%.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Piecewise Affine Maximum Torque per Ampere for the Wound Rotor Synchronous Machine


    Contributors:


    Publication date :

    2023-09-01


    Size :

    6281813 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Piecewise Affine Maximum Torque per Ampere for the Wound Rotor Synchronous Machine

    Steyaert, Bernard / Swint, Ethan / Pennington, W. Wesley et al. | IEEE | 2022


    Model Predictive Control for the Wound Rotor Synchronous Machine using Piecewise Affine Flux Maps

    Steyaert, Bernard / Eull, Michael / Swint, Ethan et al. | IEEE | 2022


    Maximum Torque per Ampere Strategy

    Nabavi Razavi, Mohamad Taghi / Farazmand, Ashkan | AIAA | 2008