[Objective] During the operation of bilateral permanent magnet linear motor

only a small portion of the terminal voltage is allocated to the resistive voltage drop and back electromotive force across the motor windings

while the majority is applied to the inductance voltage drop across the motor windings. Thus

the accuracy of inductance parameters directly affects the rationality of the converter system capacity design. Significant deviations in inductance calculations may result in either capacity redundancy

leading to unnecessary cost wastage

or insufficient capacity

preventing the motor from achieving its specified output performance. Consequently

precise calculation holds significant engineering importance. Therefore

this paper proposes an inductance parameter calculation method. [Methods] Firstly

based on electromagnetic field theory

an analytical mathematical model for bilateral permanent magnet linear motor was established. Secondly

the expressions for the air gap magnetic flux density of a single current-carrying conductor and a single-phase excited winding of bilateral permanent magnet linear motor were derived

as well as the expressions for the self-inductance and mutual inductance of the windings. Finally

the results obtained from the analytical method were compared with the finite element simulation results to verify the effectiveness of the proposed method. [Results] The error between the calculated and simulated values of the air gap magnetic flux density was 1%

and the error between the calculated and simulated inductance was less than 2%

verifying the accuracy of the proposed method. Furthermore

operational experiments spanning light-load to heavy-load conditions were conducted on a dynamic experimental platform. The measured inductance values obtained from experiments exhibited an error of 4.6% when compared to the analytical calculation values. Additionally

the terminal voltage values derived from the inductance calculations were found to be essentially consistent with the measured terminal voltage values

thereby further validating the effectiveness and engineering applicability of the proposed inductance parameter calculation method. [Conclusion] This research provides a reliable theoretical basis and technical support for parameter optimization design and power supply system configuration of bilateral permanent magnet linear motors.