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This paper proposes direct stator flux oriented control for high performance interior mounted permanent magnet brushless AC (IPM-BLAC) drives and compares it with conventional indirect stator flux vector controlled schemes which are generally referred to as direct torque control (DTC). Torque angle is controlled indirectly in conventional DTC drives through a torque control loop or a torque-axis current...
Energy efficiency is a major concern regarding the application of electrical actuators in the automotive industry. Online Maximum Torque per Ampere (MTPA) is an optimal strategy for the torque control of IPMSM at base speed, since copper losses are minimized. Current methods present various disadvantages, e.g. torque ripple, high measurement effort, heavy assumptions and convergence issues. This paper...
Flux observers in direct torque controlled (DTC) interior mounted permanent magnet (IPM) machine drives are of paramount importance as the drives rely on observed flux for control of the machine flux and torque. It is well known that a current based (CB) observer performs better at low speeds, whereas a voltage based (VB) observer is more accurate at high speeds. Hence, a large number of state-of-the-art...
The focus of this paper is on investigating the influence of skewing on the torque production of an Interior Permanent Magnet Synchronous Machine (IPMSM). The machine is designed as a traction machine according to the requirements of a parallel hybrid electric commercial heavy vehicle. In order to meet the requirements, the machine is designed with a speed higher than that of the conventional powertrain...
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