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Two maximum-torque-per-ampere (MTPA) algorithms for an interior permanent magnet synchronous motor (IPMSM) drive are presented in this paper. The proposed MTPA algorithms include an improved virtual signal injection control (VSIC) and a direct-search control. Compared to the original VSIC, the improved VSIC can be more accurate. Additionally, the comparison of two MTPA algorithms is given, including...
This paper presents an online adaline neural network (ANN) based identification method for estimating the dq-axis inductances of interior permanent magnet synchronous machine (IPMSM). This method only needs to sample the phase currents, bus voltage, rotor position angle and speed without any design parameters. In the proposed estimation, the rotor flux linkage and the stator winding resistance are...
This paper proposes a novel linear permanent-magnet (PM) vernier machine, which offers high force density, high efficiency, simple structure, and low cost. The novelty of the proposed machine is substantiated by integrating appropriate magnetization directions of PMs in the armature core. First, the structure and the operation principle of the proposed machine are descried. The machine is subsequently...
Aiming to obtain higher coupling coefficient, a new contactless structure is proposed. This structure adopts U type magnetic core structure improvement, termed as C type magnetic core. The proposed CC core transformer is compared to a conventional transformer using a general UU core with a 10 mm air gap. Factors that affect the mutual inductance coupling have been investigated, including magnetic...
This paper presents a new harmonic measurement scheme based on lifting wavelet transform (LWT) for shunt active power filters (APFs). As one of methods to build second-generation wavelets, LWT can be easy to achieve in time domain for its original bit location calculation. And it could lessen calculation complexity and depress course due to its particular structure, compared with first generation...
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