| Title |
A Two-Phase Separately Randomized Pulse Position PWM Technique with Double-Zero Vector Mode |
| Authors |
김정근(Kim Jung-Geun) ; 오승열(Oh Seung-Yeol) ; 정영국(Jung Young-Gook) ; 임영철(Lim Young-Cheol) |
| Keywords |
Double Zero Vector Mode ; Two-Phase SRP-PWM(Separately Randomized Pulse Position PWM) ; Reduction of Harmonics Spectrum ; Critical Modulation Index |
| Abstract |
In case while M(modulation index) is more than 0.7, the spectrum of motor voltage and current of a conventional two-phase SRP-PWM scheme are not reduced considerably. To solve the problems of a conventional two-phase SRP-PWM, this paper proposes a two-phase SRP-PWM(DZSRP-PWM) with double zero vector mode which zero vector is selected as V(111) in case of M >0.7, and zero vector is selected as V(000) if M < 0.7. For the validity of the proposed method, the PSIM simulations and experiments were achieved. And the simulation and experiment results show that the voltage and current harmonics all over the modulation index are spread to a wide band area. |