부산대학교 도서관

In the paradigm of more-intelligent ac drives, the adoption of a system parameter-free algorithm for the current control is a substantial innovation, as it makes modelling and identification of the physical system obsolete. The prediction of current space vector trajectory is based on an adaptive model instead of a traditional motor model. A newly tailored optimisation problem exploits the current prediction to generate the optimal voltage vector reference within an hexagonally limited continuous set. The paper provides several hints for design and implementation, while also providing a remedy for stagnation phenomena that can appear due to the application of a constant voltage during transients. The proposed current control algorithm has been tested extensively on an experimental test rig, featuring a full bus voltage, and two different synchronous motors, either with or without permanent magnets. It is not necessary to fine-tune any controller or to know in advance the motor connected.