This paper presents the comparative study of three phase twenty five level diode clamped and cascaded H-bridge multilevel inverters. The comparison is made in respect of requirement of devices, quality of output voltage and reduction of total harmonic distortion at the multilevel inverter terminals. In this work multicarrier sinusoidal pulse modulation control methods of Phase disposition (PD-P...

This paper presents a novel control method to improve the efficiency of low-voltage DC-DC converters at light loads. Pulse Width Modulation (PWM) converters have poor efficiencies at light loads, while pulse frequency modulation (PFM) control is more efficient for the same cases. Switching losses constitute a major portion of the total power loss at light loads. To decrease the switching losses...

We have proposed a novel driving concept for TFT-OLEDs, pulse-width modulation with current uniformization. This driving method can simultaneously achieve precise grayscale and exceedingly improve luminance uniformity. Lately, we succeeded to reduce the number of TFTs in a pixel circuit from nine to seven. Especially in this paper, its working and tolerance against characteristic deviations of ...

Kebutuhan energi listrik domestik mayoritas berbentuk gelombang sinusoida pada frekuensi 50 Hz. Sumber terbarukan dc atau daya dengan tidak terkontrol. Untuk itu diperlukan alat yang dapat mengontrol bentuk dan frekuensinya. Alat ini disebut inverter. Inti dari inverter terletak kontrol switching, dimana ditentukan ini, salah satunya adalah SPWM. Dipasaran tersedia pembangkit SPWM seri EGS-002,...