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This paper presents three current control strategies for a switched reluctance machine (SRM). Two classical controllers are recall : the hysteresis and the proportional - integral controller. Dynamic and current ripples with both controllers are compared and discussed. Then, a new current controller qualified as “hybrid controller” is proposed. It is a combination of the two previous structures. The...
A novel direct torque control strategy, using genetic algorithm on-line to optimize the fuzzy PI controller, is proposed. In this approach, according to speed error and its first time derivative, the proportional coefficient Kp and integral coefficient Ki can be on-line adjusted by fuzzy adaptive PI speed regulation, and the fuzzy logic adapter parameters are optimized by genetic algorithm to improve...
This paper deals with control strategies and reconfiguration needed to maintain PMSM drives in operation after a fault leading to a single-phase open circuit has occurred. The considered drive is composed of a three-phase star-connected machine and a four-leg voltage-source inverter, the fourth leg being permanently connected to the neutral point of the machine. We investigate different current and...
This paper presents a direct torque control (DTC) applied to a three-phase asynchronous motor supplied by three-phase rectifier with absorption of the sinusoidal current cascaded with a two levels inverter in order to improve certain electrical sizes as the source current, and other mechanical characteristics as the undulations of the torque and the flux's distortion. The speed control is realised...
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