关键词: 牵引系统, 随机载波频率脉宽调制, 噪声, 载波

Abstract: In view of the electromagnetic noise problem caused by the modularization, miniaturization and lightweighting of the new generation of rail transit trains,a control strategy based on wide-band random carrier frequency was presented. This method can dynamically adjust the magnetic field intensity and the carrier frequency in a wide range, reducing the electromagnetic noise of motor. MATLAB simulation tests and on-track operational tests were conducted, a comparative analysis of harmonic content and noise levels was complemented, the rationality and feasibility of the proposed algorithm were verified, offering a novel approach for noise reduction design in rail transit vehicles.

Key words: traction system, random carrier frequency PWM( RCF-PWM), noise, carrier