Analysis and Reduction of Surface Losses in Solid Pole Synchronous Machines

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420254
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Kanazawa Institute of Technology
• Principal Investigator: Shima Kazuo 金沢工業大学, 工学部, 教授 (20410285)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 電気機器 / 回転機 / 同期機 / 損失 / 塊状鉄心

Outline of Final Research Achievements

In this study, to clarify the principle of reducing the surface losses by grooves in solid-pole synchronous machines, a 1.5-kVA prototype machine was built, and its characteristics in a generator mode were investigated through experiments and finite element analysis (FEA). In addition, to more clearly grasp the effect of the grooves, its characteristics were compared under the same output power with those of two synchronous machines (ungrooved solid-pole synchronous machine and ungrooved laminated-pole synchronous machine) of the same size. The experimental and FEA results showed the following. By adding the grooves in the solid poles, 1) the surface losses can be reduced, 2) the field current is increased and the load angle is decreased, and 3) the magnetic saturation tends to occur in the field poles.

Free Research Field

工学