Investigation of Interior Permanent Magnet Machine With Integrated High and Low Voltage Windings for Electronic Hydraulic Power Steering

作者：Wenfei Yu, Ji Qi, Wei Hua, Jiawei Zhou · 发表于：IEEE Transactions on Transportation Electrification · 年份：2025 · DOI：10.1109/tte.2025.3559626 · 被引用次数：2 · 研究领域：Electric Motor Design and Analysis、Magnetic Bearings and Levitation Dynamics、Engineering and Technology Innovations

To solve the issues of conventional hydraulic power steering systems (HPS) in terms of fuel economy and steering control performance, the electronic hydraulic power steering (EHPS) system has attracted considerable attention with advanced electronic control technology. In this paper, an interior permanent magnet synchronous machine (IPMSM) with concentrically integrated high voltage (HV) and low voltage (LV) windings is proposed in an EHPS for electric vehicles (EVs), which replaces the conventional co-axial dual-machine configuration structure, owing to the advantages of high integration, strong reliability, lightweight, and small size. Firstly, the novelty concept of integrating a set of concentric HV and LV windings in an IPMSM is proposed. Secondly, the magnetic field modulation (MFM) behavior of the dual-windings IPMSM machine is investigated, where the analytical expressions of PM-excited and armature reaction fields are derived respectively. Then, two structural improvement measures for rotor structure are proposed based on the MFM principle and finite element method (FEM), involving modification of the rotor outer contour geometry and implementation of segmented skewing. The cogging torque, back electromotive force and on-load performance are optimized and improved. Finally, a prototyped IPMSM is manufactured and a testing platform is built, where the performance and feasibility of the proposed machine are verified through experiments. The results confirm that compare...