Effect of Magnet Temperature on Optimal Current Control Trajectory of an Interior PM Synchronous Machines

2017-01-1220

03/28/2017

Event
WCX™ 17: SAE World Congress Experience
Authors Abstract
Content
In an interior permanent magnet machine, magnet temperature plays a critical role in determining optimal current control trajectory. Monitoring magnet temperature is a challenging task. In lab and various specialized applications, infrared sensors or thermocouples are used to measure the temperature. But it adds cost, maintenance issues and their integration to electric machine drives could be complicated. To tackle issues due to sensor based methods, various sensorless model based approaches are proposed in the literature recently such as flux observer, high-frequency signal injection, and thermal models, etc. Although magnet temperature monitoring received a lot of attention of researchers, very few papers give a detailed overview of the effects of magnet temperature on motor control from a controls perspective. This paper discusses the impact of magnet temperature variation on Maximum Torque per Ampere control and Flux Weakening Control trajectory. It will help control engineers to design better control algorithms to compensate the effect of magnet temperature to improve torque accuracy, system efficiency and to ensure stable operation in flux weakening region.
Meta TagsDetails
DOI
https://doi.org/10.4271/2017-01-1220
Pages
5
Citation
Khan, A., "Effect of Magnet Temperature on Optimal Current Control Trajectory of an Interior PM Synchronous Machines," SAE Technical Paper 2017-01-1220, 2017, https://doi.org/10.4271/2017-01-1220.
Additional Details
Publisher
Published
Mar 28, 2017
Product Code
2017-01-1220
Content Type
Technical Paper
Language
English