電動車驅動馬達用電磁鋼片開發

Development of Electrical Steels for EV Traction Motors

蕭一清(I. C. Hsiao) ； 黃議興(Y. S. Huang) ； 陳宗榮(T. R. Chen)

《鑛冶：中國鑛冶工程學會會刊》 54卷2期 (2010/06) Pp. 47-53

https://doi.org/10.30069/MM.201006.0004

摘要

本文針對電動車馬達運轉特性，開發符合性能需求之電磁鋼片。電動車在起步或爬坡時，馬達損耗主要來自銅損，電磁鋼片需具備高磁通密度，而在高速行駛時，損耗則來自鐵損，故電磁鋼片要具有高頻低鐵損特性。透過合金添加來降低鐵損之方式，除了將使飽和磁通密度嚴重下降外，亦無法滿足高頻低鐵損需求。透過厚度的減薄，以及使用適當合金量鋼材，並透過製程改善，使成品獲得合適之晶粒尺寸，如此電磁鋼片將可滿足電動車馬達性能之需求。

關鍵字

電磁鋼片 ； 厚度 ； 鐵損 ； 銅損 ； 磁通密度 ； 晶粒尺寸

並列摘要

We developed electrical steels satisfying the requirements for EV traction motors. The electrical steels must have high magnetic flux density under given field strength, so as to decrease the copper loss for vehicle starting or mountain climbing. They also must have a lower iron loss at high frequency for high vehicle speed. Increasing the alloy contents of the steel is not a solution as the product though lowering the high frequency iron loss, yet damaging the flux density seriously. We developed an effective production process that can provide the electrical steel sheet with a suitable flux density by controlling the alloy contents to a certain level and lowering the iron loss via thinning the sheet thickness. We also developed the process to obtain optimum grain size to lower the eddy current loss. The developed electrical sheets are suitable for the requirements of electrical vehicle traction motors.

並列關鍵字

electrical steels ； thickness ； iron loss ； copper loss ； flux density ； grain size