Core Losses and Machine Design for Electric/Hybrid Vehicles

电动/混合动力汽车的磁芯损耗和机器设计

• 批准号: 357449-2013
• 负责人: Pillay, Pragasen
• 金额: $ 2.99万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=662196
• 关键词: Core; Losses; Machine; Design; Electric

The area of core losses in electrical machines is of growing interest as higher speed machines are being designed with complicated geometries, leading to complex flux patterns. The fluxes may be primarily alternating, but a significant portion of the machine experiences a rotational loss, an area in which very little work has been done. The work proposed is divided into three sections.** The first is to develop more accurate models for waveforms that are primarily pulsating. The applicant has found that fundamental errors are being made in the separation of losses into eddy currents and hysteresis because of how the measurements are made. In typical Epstein specimens the entire flux is measured flowing in the lamination, yet as frequency increases, skin effect takes over and there is a variation in the magnitude and phase of flux density within the thickness of the lamination. More accurate modeling has allowed this variation to be taken into account, but this must still be translated into more accurate calculations of the actual losses.** Some fundamental work in the measurement of rotational iron losses in machines have been done recently. A new test fixture has been designed and built and limited tests have been conducted. The purpose of this task is to advance the measurement to include non-sinusoidal excitations, while the flux is rotating and to include a wider range of materials and gauges. On the modeling side, fundamental work needs to be done on developing a formula for hysteresis and eddy current losses while the flux is rotating, similar to what has been done for pulsating fluxes.** The third task is to use the results in the core loss modeling to design a new synchronous reluctance motor with low torque ripple, without the need for skewing. Skewing of the stator or rotor increases the manufacturing complexity. Also the average flux density is reduced. A new technique related to the orientation of the ribs in the rotor is proposed which can allow torque ripple minimization in the absence of skewing.****

电机中的磁芯损耗的领域越来越受到关注，因为高速电机被设计成具有复杂的几何形状，从而导致复杂的磁通模式。通量可能主要是交替的，但是机器的很大一部分经历旋转损失，在该区域中已经做了很少的工作。拟议的工作分为三节。 第一个是为主要是脉动的波形开发更精确的模型。申请人已经发现，由于如何进行测量，在将损耗分离为涡电流和磁滞时产生了基本误差。在典型的爱泼斯坦样品中，测量在叠层中流动的整个通量，然而随着频率增加，趋肤效应接管，并且在叠层厚度内通量密度的幅度和相位存在变化。更精确的模型允许考虑到这种变化，但这仍然必须转化为对实际损失的更精确的计算。 近年来，在机械转动铁损的测量方面做了一些基础性的工作。已设计和制造了一个新的测试夹具，并进行了有限的测试。本任务的目的是推进测量，以包括非正弦激励，而通量旋转，并包括更广泛的材料和规格。在建模方面，需要做的基本工作是开发磁通旋转时的磁滞和涡流损耗的公式，类似于脉动磁通的公式。 第三个任务是使用铁损模型的结果来设计一种新的同步磁阻电动机，具有低转矩涟漪，而不需要偏斜。定子或转子的偏斜增加了制造复杂性。此外，平均通量密度降低。提出了一种与转子中肋的取向有关的新技术，该技术可以在没有偏斜的情况下使转矩涟漪最小化。*