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Control Systems R&D - Switched Reluctance Machines (SRM) feature a rugged structure that is most suitable to demanding environments such as those found in automotive and aerospace. However, the SRM is highly nonlinear machine that requires advanced controls to realize high perfomance operation. In particular, low torque ripple and low audible noise are challenges for such a system. ESL continues to develop control algorithms to mitigate torque ripple and generated noise via techniques such as current shaping. In addition, sensorless control techniques have been developed that are suitable for a variety of operating ranges and can minimize startup transients, without requiring additional hardware. |
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