| Title |
Pseudo-Randomized Frequency Carrier Modulation Scheme with Improved Harmonics Spectra Spreading Effects |
| Authors |
Jong-nam Kim ; Young-Gook Jung ; Young-Cheol Lim |
| Keywords |
Improved pseudo-randomized frequency carrier modulation scheme ; Harmonics spectra spreading effect ; Three-phase HBML drives |
| Abstract |
In case that conventional PRC(Pseudo-Randomized Frequency Carrier) modulation scheme is applied to a three-phase HBML(H-Bridge Multi-Level Inverter), the dominant harmonics spectra appear at twice switching frequency. In this paper, the dominant harmonics spectra spreading effect of the conventional PRC scheme was improved by using three stage MUXs(Multiplexers) and two triangular-carriers with fixed frequency which has mutual relation of the twice frequency. To confirm the validity of the improved PRC scheme, the experiment were performed on a 1.5[kw] three-phase HBML based induction motor drives. And, the harmonics spectra of the conventional and improved PRC schemes are compared and discussed.ㅁ |