Optimisation of an IPMSM

What is it about?

In engineering terms, it is always desirable to maximise the efficiency of the motor and to look at the problem from an economic viewpoint. In other words, minimisation of the weight and cost of the motor is required. As these two aspects are like two sides of a coin, it is usually aimed to acquire the best efficiency per weight and cost. As a result, performance improvement of Permanent Magnet Synchronous Motor has two sides: technical and economic. This paper proposes a new approach for design optimisation of an Interior PMSM taking into account both technical performances and economic considerations. The selected rotor configuration is a good candidate for general purpose industrial applications. A Multi-objective optimisation technique based on a new and efficient Magnetic Equivalent Circuit of the motor is applied to obtain optimal motor parameters. A Pareto front composed of possible optimal solutions is provided. The best optimal solution is then selected using a k-means clustering algorithm. To verify the efficacy of the design optimisation, the performance characteristics of the optimal PMSM are compared by both the Finite Element simulations and the experiments. In the test setup, an 8-pole, 200-watt, four-phase IPMSM with an optimised structure is prototyped where the results give agreeable accuracy.

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Why is it important?

Comprehensive techno-economic design optimization for IPMSM is performed which makes it easy to decide the optimal scheme.

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