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This paper presents a partitioned stator (PS) switched flux permanent magnet (PS-SFPM) synchronous generator (PS-SFPM-SG) and its electromagnetic characteristics under different load conditions. The adopted PS structure enables the PS-SFPM-SG to achieve higher power and torque density due to enlarged slot space for the armature windings by moving PMs to an inner stator. Hence, the space conflict between...
A partitioned stator wound field switched flux machine for electric vehicle is designed and analyzed in this paper. The design process is divided into two stages, i.e. optimal design of dimensional parameters and armature coil turns based on the torque-speed and power-speed curves requirements. The influence of key dimensional parameters on the average electromagnetic torque is investigated. A small...
In this paper, an active voltage regulation strategy of the partitioned stator switched flux permanent magnet (PM) (PS-SFPM) generator is proposed to enable the PS-SFPM generator supplying isolated passive load to obtain a stable output voltage at different load conditions. The target is achieved through mechanically varying the relative inner stator position and adjusting the PM flux-linkage. Over...
Parasitic losses, including PM and iron losses, in novel 12-stator-pole partitioned stator switched flux permanent magnet (PS-SFPM) machines with double- and single-layer windings are comparatively analyzed by 2-dimensional finite element method (FE) in this paper, together with the influence of different stator/rotor-pole combinations, i.e. 12/10, 12/11, 12/13, 12/14 stator/rotor poles. FE results...
Partitioned stator (PS) machines employ two separate stators to accommodate armature windings and permanent magnets (PMs) respectively, alleviating the stator space conflict in stator-PM machines and hence significantly boosting the torque density. However, the PM usage volume of PS machines is relatively large and the cost is high, which is undesirable for cost sensitive applications. In this paper,...
This paper firstly investigates the flux-weakening control performance of two types of new partitioned stator switched flux permanent magnet (PM) (PS-SFPM) machines and then proposes a novel mechanical flux-weakening technique. The PS-SFPM machine topologies, operation principles and flux weakening control methods are described. In addition, it is shown that by mechanically varying the relative position...
In this paper, the electromagnetic performance of partitioned stator switched flux permanent magnet (PM) (PS-SFPM) machines with single- and double-layer windings are compared when the inner stator is equipped with the same number or half the number of PMs as that of the outer stator teeth. Electromagnetic performance of these PS-SFPM machines is investigated by 2-dimensional finite element analysis...
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