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This paper presents a dynamic model suitable for accurate cosimulation of fault-tolerant permanent-magnet motor drives featuring independent-phase structure. The model is developed in a circuital form where the usual inductive parameters and back electromotive force coefficient are replaced by current and rotor position dependent functions, so that the exact electromagnetic nature and geometry of...
An original analytical expression is presented in this paper to obtain optimal currents minimizing the copper losses of a multi-phase Permanent Magnet Synchronous Motor (PMSM) under fault conditions. Based on the existing solutions [i]opt1 (without zero sequence of current constraint) and [i]opt2 (with zero sequence constraint), this new expression of currents [i]opt3 is obtained by means of a geometrical...
The electrical drive systems used in automotive applications has to be both reliable and of high performance. To fulfill these demanding requirements a modular fault tolerant switched reluctance motor is proposed, which is controlled by means of an effective direct instantaneous torque controller. In the paper both the motor and the control system are described. By simulations the working principle...
Electrical machines and drives used in various safety-critical applications are of special design in order to achieve the required fault tolerance level. In the paper a novel modular fault tolerant switched reluctance machine is proposed and studied. It is proved by means of dynamic simulations that the proposed machine is able to have continuous operation also despite of five severe winding fault...
This paper describes an enhanced optimal torque control strategy for fault-tolerant permanent magnet machines under flux weakening operations. By adjusting the degree of flux weakening according to estimated instantaneous torque control errors, the torque control performance of the machine can be improved when operating above its base speed under either open- or short-circuit fault conditions. Extensive...
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