This paper presents the comparison of Unipolar Inverted Sine Carrier Pulse Width Modulation (UISCPWM) techniques for the Cascaded Multi Level Inverter (CMLI). Due to switch combination redundancies, there are certain degrees of freedom to generate the multilevel AC output voltage. This paper presents the use of Control Freedom Degree (CFD) combination. The effectiveness of the pulse width modul...

This paper presents a new Pulse Width Modulation (PWM) controller for Unmanned Aerial Vehicle (UAV) precision sprayer for agriculture using a TL494 fixed-frequency pulse width modulator together with a data acquisition board and developed software. An UAV can be remotely controlled or flown autonomously by pre-programmed flight plans. The PWM controller was implemented through the guidance syst...

This paper provides analytical and graphical methods for the study, performance evaluation, and design of the modern carrier-based pulsewidth modulators (PWM’s), which are widely employed in PWM voltage-source inverter (VSI) drives. Simple techniques for generating the modulation waves of the high-performance PWM methods are described. The two most important modulator characteristics—the curren...

In this paper grid connected photovoltaic generation system to mitigate the lower order harmonics by using SHE PWM inverter is discussed. In Renewable sources, solar photovoltaic system is more flexible and pollution free. Then SHE PWM inverter is used to maintain the output voltage with reduced selective harmonics ( 5, 7, 11, 13 ). The system is proposed to reduce selective harmonics in the ou...

Electric vehicle (EV) is one of the effective solutions to control emission of greenhouses gases in the world. It is of interest for future transportation due to its sustainability and efficiency by automotive manufacturers. Various electrical motors have been used for propulsion system of electric vehicles in last decades. In this paper brushed DC motor, Induction motor (IM), switched reluctan...

This paper proposes a unified robust zero-error tracking control scheme for constant-voltage-constant-frequency (CVCF) PWM converters to eliminate the tracking error in the presence. Based on the internal model principle, the proposed control scheme plugs a reference signal generator into the stable conventional feedback closed-loop system to accomplish zero error tracking of the dc or ac refer...

1 Abstract—This paper presents an efficient and effective method for an optimal pulse width modulated (PWM) control of switched-capacitor DC/DC power converters. Optimal switching instants are determined based on minimizing the output ripple magnitude, the output leakage voltage and the sensitivity of the output load voltage with respect to both the input voltage and the load resistance. This o...

The Pulse Width Modulation (PWM) power electronics systems often produce objectionable acoustic noise at the PWM switching frequency. For example, in a fan / blower drive, the drive used for the blower should use “spread spectrum PWM” technology (also known as Random PWM) where acoustic noise radiating through the duckwork is a very seriously concerned. This paper shows the theoretical basis fo...

A novel zero-voltage-transition (ZVT) pulsewidth modulated (PWM) Cúk power-factor corrector (PFC) is proposed to achieve unity power factor under zero-voltage-switching (ZVS) operations. In the proposed ZVT PWM Cúk PFC, not only the power switch, but also the power diode, commutate under ZVS. The proposed topology has the shortest ZVT time and, thus, the shortest minimum duty cycle compared wit...