Affiliations: Nanjing University of Science and Technology, Nanjing, Jiangsu, China
Correspondence:
[*]
Corresponding author: Siqin Chang, Nanjing University of Science and Technology, Nanjing, Jiangsu, China. E-mail:[email protected]
Abstract: An optimal design procedure based on the dynamic
characteristics of a hybrid excited linear actuator (HELA) constrained in a
specific volume has been developed. For achieving fast response and low
power consumption, two electrical parameters including excitation duration
and coil diameter were optimized. Three models, including a loss model, an
electromagnetic model, and a mechanical model were constructed, and optimal
design calculation was performed by using 3D finite element method (FEM).
According to the results, a hot-gas valve directly driven by HELA was
manufactured and dynamic experiments were performed. The results show the
experimental dates agree well with simulating calculation. The open and the
closed response time is 2.3 ms and 3.5 ms separately, when the total mass of
the HELA is 100 g. Moreover, the prototype's cycle loss is 0.7 J independent
of the operation frequency. The experiments show that the design procedure
is sufficiently accurate, which validate that the prototype has
characteristics of fast response and low power consumption. Besides, the
eddy current loss is 44.9% of the total loss, and the eddy current
increases the response time over 8.6 percent according to quantitative
analysis, which validate the necessity of the coupling model.
Keywords: Hybrid excited linear actuator, dynamic characteristic, hot-gas valve, optimal design, loss
