Affiliations: [a] Department of Electrical and Electronic Engineering,
University Putra Malaysia, Selangor, Malaysia | [b] Department of Electrical Engineering, Majlesi Branch,
Islamic Azad University, Esfahan, Iran | [c] Institute of Advanced Technology, Universiti Putra
Malaysia, Selangor, Malaysia | [d] Shinshu University, Nagano, Japan
Correspondence:
[*]
Corresponding author: Mohammad Reza Zare, Department of
Electrical and Electronic Engineering, University Putra Malaysia, 43400 UPM
Serdang, Malaysia. Tel.: +60 14 7367991; Fax: +60 3 89466323; E-mail: [email protected]
Abstract: Detailed analytical and experimental approaches were performed to
calculating the ratio of the pull-in thrust to the input power of High Density
Transverse Flux linear Stepper Motor (HDTFLSM) with considerations of the
electrical time constant, the mechanical time constant and the friction. The
analytical approach involves the use of Fourier series analysis to derive the
equation for the pull-in thrust to input power ratio. The experimentation was
performed under different load conditions until the motor come to the
standstill value. A chopped voltage was applied to motor at different speeds
and the obtained results were compared with those for normal voltage. Comparison between analytical and experimental results shows good agreement,
for instance at 0.22 m/s the difference percentage on normal voltage and
chopped voltage are 6.1% and 6.7%, respectively. The chopped voltage has
higher ratio of the pull-in thrust to the input power compare to normal voltage
so that the machine performance can be improvised to a greater extent. The
maximum improvement percentage of 18.8% on pull-in thrust to input power
ratio for motor with chopped voltage was obtained at 0.22 m/s.
Keywords: High density, linear motor, pull-in thrust, transverse flux, stepper motor
