An Optimal Random Carrier Pulse Width Modulation Technique Based on a Genetic Algorithm

Jie Xu; Zi-Ling Nie; Jun-Jie Zhu

An Optimal Random Carrier Pulse Width Modulation Technique Based on a Genetic Algorithm

Jie Xu

Zi-Ling Nie

Jun-Jie Zhu

Vol. 17, No. 2, pp. 380-388, Mar. 2017

10.6113/JPE.2019.17.2.380

EMI

GA with a constraint

Mechanical vibration

Optimal carrier sequence

RCPWM

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Abstract

Since the carrier sequence is not reproducible in a period of the random carrier pulse width modulation (RCPWM) and a higher harmonic spectrum amplitude is likely to affect the quality of the power supply. In addition, electromagnetic interference (EMI) and mechanical vibration will appear. To solve these problems, this paper has proposed an optimal RCPWM based on a genetic algorithm (GA). In the optimal modulation, the range of the random carrier frequency is taken as a constraint and the reciprocal of the maximum harmonic spectrum amplitude is used as a fitness function to decrease the EMI and mechanical vibration caused by the harmonics concentrated at the carrier frequency and its multiples. Since the problems of the hardware make it difficult to use in practical engineering, this paper has presented a hardware system. Simulations and experiments show that the RCPWM is effective. Studies show that the harmonic spectrum is distributed more uniformly in the frequency domain and that there is no obvious peak in the wave spectra. The proposed method is of great value to research on RCPWM and integrated power systems (IPS).

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Cite this article

[IEEE Style]

J. Xu, Z. Nie, J. Zhu, "An Optimal Random Carrier Pulse Width Modulation Technique Based on a Genetic Algorithm," Journal of Power Electronics, vol. 17, no. 2, pp. 380-388, 2017. DOI: 10.6113/JPE.2019.17.2.380.

[ACM Style]

Jie Xu, Zi-Ling Nie, and Jun-Jie Zhu. 2017. An Optimal Random Carrier Pulse Width Modulation Technique Based on a Genetic Algorithm. Journal of Power Electronics, 17, 2, (2017), 380-388. DOI: 10.6113/JPE.2019.17.2.380.