| Magnetostrictive material is one of the most important and basic materials for the development of high and new technology.Fe-Ga alloy is a new type of magnetostrictive material.The energy conversion device based on Fe-Ga alloy is widely used in aerospace,intelligent control,precision instruments and other fields.It is necessary to know the hysteresis characteristics,power consumption characteristics and permeability parameters when designing an energy conversion device using Fe-Ga alloy.It is necessary to analyze the output characteristics of Fe-Ga alloy transducer.Therefore,the magnetic properties test and the transducer output characteristics of Fe-Ga alloy are studied in this paper.By the testing system of dynamic magnetic characteristics based on AMH-1M-S and magnetostrictive material multi field coupling characteristic testing system,the hysteresis characteristics,power consumption characteristics,magnetization characteristics,permeability and output characteristics of dual excitation coil transducer are investigated and analyzed.Firstly,based on the multi-field coupling characteristic testing system of magnetostrictive materials,the low-frequency dynamic hysteresis curves of rod-shaped Fe-Ga alloy were measured and electromagnetic loss is separated at the different frequencies.The high frequency dynamic hysteresis curve of ring Fe-Ga alloy was measured by AMH-1M-S dynamic magnetic characteristic testing system,and the electromagnetic loss of ring Fe-Ga alloy was analyzed by hysteresis curve.Secondly,magnetizing curve and amplitude of magnetic permeability curve are measured by using the AMH-1M-S dynamic testing system under the different magnetic field frequency.With the change of magnetic field frequency the maximum magnetic permeability,initial permeability,elastic permeability and viscosity permeability are analyzed by using the testing data.Using the equivalent resistance and inductance model of coil with magnetic core and the theory of loss factor and the relative loss and considering from two aspects of magnetic energy loss and store,we find that the best working frequency of magnetic field about designing the Fe-Ga alloy device.Then,the impedance matching of the magnetic core excitation coil is carried out.In order to make the excitation coil generate a large magnetic field,the B-H and ?-H of the silicon steel sheet of the coil core material are tested at different frequencies using the AMH-1M-S dynamic magnetic properties testing system.The complex impedance of magnetic core excitation coil is calculated at the same time.According to the principle of series resonant circuit,the capacitance value of circuit resonance is calculated theoretically and verified experimentally.Finally,the double-pole coil Fe-Ga alloy transducer was fabricated based on the magnetostrictive property.Based on the finite element method,the magnetic field distribution of the Fe-Ga rod alloy on the transducer was calculated at different frequencies.The change of electromagnetic energy,magnetic energy storage and output mechanical energy of the Fe-Ga alloy transducer at different magnetic field frequencies is analyzed using the conversion relationship between magnetic energy and mechanical energy. |
PDF Full Text Request