Radial Non-contact Magnetic Excitation Technology of Rotating Shaft System
To meet the actual demand of loading radial non-contact dynamic linear excitation on the rotating shaft in the vibration test,a radial non-contact magnetic exciter is designed,manufactured and tested for its per-formance.Firstly,the linearized radial magnetic force calculation method is derived using the magnetic circuit analysis method.Based on this,the structural and winding parameters of the exciter are designed.Then,the prototype is processed and the non-contact force test system is designed to test the exciter's frequency domain ac-tuation performance.Finally,the exciter is applied to the shafting bench vibration excitation test.A conversion method to get the non-contact actuation force is proposed.The excitation results are compared with the force hammer excitation method.At the same time,the influence on the excitation effect is studied by changing the signal voltage and rotation speed.The test results show that the exciter performs well and achieves the design objectives.The errors between the test results and the theoretical calculation results as well as the hammering re-sults are within a reasonable range,which verifies the applicability and accuracy of the calculation,design and test verification method used in this paper.
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