Open AccessField weakening control of a PM vehicle drive
Author(s) -
Zbede Yaman,
Apsley Judith
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.5347
Subject(s) - control theory (sociology) , rotor (electric) , controller (irrigation) , ampere , torque , range (aeronautics) , electronic speed control , magnet , field (mathematics) , computer science , control (management) , current (fluid) , engineering , mathematics , physics , mechanical engineering , artificial intelligence , pure mathematics , agronomy , electrical engineering , biology , aerospace engineering , thermodynamics
This paper develops a new field weakening method for an integrated permanent magnet synchronous machine vehicle drive. This method adopts both the DC‐link and the rotor speed as a feedback signals to generate the demagnetising current reference. This eliminates the effect of the rotor speed on the FW controller dynamics and ensures stable operation across the whole range of speeds. Mathematical analysis of the system is used to design the controller gains to achieve the desired dynamic response. A maximum torque per ampere (MTPA) strategy is included in the control design, with a linearised function to reduce the computational demand. Experimental results show stable and satisfactory operation at different speeds and load conditions. They also illustrate smooth transition between the MTPA operation and the FW operation when the rotor speed crosses base speed.