| Title |
Chaotic Double Tent Mapping PWM Scheme for Acoustic Noise Reduction of a Motor Drive |
| Authors |
Jun-Hyoung ; Young-Gook Jung ; Young-Cheol Lim |
| Keywords |
Chaotic phenomenon ; Double tent mapping PWM scheme ; Bifurcation tree ; Harmonics spectra ; Acoustic noise reduction |
| Abstract |
This paper proposes a chaotic double tent mapping PWM scheme for mitigation the acoustic noise of a motor drive. The chaos area λ=0.99 in bifurcation tree of the double tent mapping is used for generating the chaotic numbers. A 80C196 micro-controller is employed for generation of chaotic numbers, and the triangular carrier with chaotic frequency is obtained by using a 80C196 micro-controller and a MAX038 frequency modulator. The experiments are executed with a 1.5[kw] induction motor drive under the 2.5[A] load condition. As results, the experimental results show that the carrier, voltage and 3-D switching noise spectra of the proposed scheme is spread over the chaotic frequency range with no specific frequency concentration. Thereby, the shrill acoustic noise radiated from a motor drive is reduced by the proposed scheme. |