Volume 32 Issue 5
May  2017
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Theoretical analysis and experiment of power loss in giant magnetostrictive actuator[J]. Journal of Aerospace Power, 2017, 32(5): 1066-1073. doi: 10.13224/j.cnki.jasp.2017.05.006
Citation: Theoretical analysis and experiment of power loss in giant magnetostrictive actuator[J]. Journal of Aerospace Power, 2017, 32(5): 1066-1073. doi: 10.13224/j.cnki.jasp.2017.05.006

Theoretical analysis and experiment of power loss in giant magnetostrictive actuator

doi: 10.13224/j.cnki.jasp.2017.05.006
  • Received Date: 2015-09-05
  • Publish Date: 2017-05-28
  • The performance of giant magnetostrictive actuator (GMA) is seriously affected by temperature rising under high frequency large current. In order to reduce GMAs temperature, pipe cooling was presented and its working principle was introduced. According to Ohms law, coil loss was obtained under the action of alternating current (AC) and direct current (DC). Based on Maxwell equation and imaginary part of complex permeability, the eddy current loss and hysteresis loss of GMM were deduced, respectively. Then, it was found that GMM power loss accounted for 5% of GMA power loss when the drive frequency reached 50 Hz. Finally, the experiment platform of GMA thermal characteristic was built and the result indicated that the calculation of GMA power loss was in good agreement with that of theory. And the pipe cooling had good cooling effect on GMA temperature. GMM rod temperature could be controlled within 50℃. The maximum error of the experiment and simulation was within 3℃. The research result further indicates the calculation of GMA power loss is valid and has a significant guidance for the design and application of GMA.

     

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