摘要
为了研究铁镓换能器在不同频率磁场下的输出变化规律,设计一种双励磁线圈的铁镓换能器,分析不同预应力下的静态和动态输出特性。研究不同频率下的磁滞特性,通过磁场能和机械能之间的转换关系,确定不同预应力下输出机械能和频率的关系。结果表明:同一预应力下,静态应变和输出位移随着磁场的增大先逐渐增大后趋于饱和;同一频率下,静态应变和输出位移随预应力的增加先增加后减小,在2MPa时输出位移数值最大。同一预应力下随着频率的增加,动态输出位移最大值逐渐减小;同一频率下随着预应力的增加,最大位移值先增加后减小。同一频率下在预应力为2MPa时磁机械耦合系数最大,输出机械能最大;同一预应力下输出机械能随着频率的增加先增加后减小,之后又逐渐增加。
In order to study the output variation law of Fe-Ga transducer under different frequency magnetic fields, a Fe-Ga transducer with double excitation coil is designed. The static and dynamic output characteristics under different prestress are studied. The hysteresis characteristics at different frequencies are also studied. Through the conversion relationship between magnetic field energy and mechanical energy, the relationship between output mechanical energy and frequency is determined. The results show that under the same prestress, the static strain and output displacement gradually increase with the increase of the magnetic field and then become saturated. At the same frequency, the static strain and output displacement increase first and then decrease with the increase of prestress, and the static strain and output displacement values are the largest at 2 MPa. Under the same prestress, the output displacement maximum decreases with the increase of the frequency. The maximum displacement increases first and then decreases with the increase of prestress at the same frequency. At the same frequency, the magneto-mechanical coupling coefficient is the largest when the prestress is 2 MPa, and the output mechanical energy is the lar-gest too. Under the same prestress, the output mechanical energy increases first and then decreases with the increase of frequency, and then increases gradually.
作者
翁玲
梁淑智
王博文
黄文美
孙英
Weng Ling;Liang Shuzhi;Wang Bowen;Huang Wenmei;Sun Ying(State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology ,Tianjin 300130 China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology ,Tianjin 300130 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2019年第23期4859-4869,共11页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51777053)
河北省自然科学基金重点项目(E2017202035)资助
关键词
铁镓换能器
预应力
位移
输出机械能
Fe-Ga transducer
prestress
displacement
output mechanical energy
