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This paper presents the improved back-EMF of Interior Permanent Magnet Synchronous Generator(IPMSM) for small hydropower generator. To improve back-EMF characteristics, the size and position of notch are applied to the rotor. In addition, parametric analysis of the notch size and position was performed. Finally, the back-EMF characteristic analysis are confirmed by the experimental results.

Improved back-EMF of 30kW Interior Permanent Magnet Synchronous Generator for Small Hydropower Generation