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This paper presents an output current ripple reduction technique for a three-level ZVZCS DC-DC converter which the output power is controlled by phase-shifted pulse width modulation (PSPWM). By means of 2 circuits of half bridge three-level DC-DC converter which operated by 90° phase difference or interleaving technique, as the results, the ripple of output current waveform is reduced significantly...
This paper shows the circuit and methodology of the new charger for tracking MPP on any level of irradiation by using Matlab Simulink Program. The circuit is the Interleaved Buck-Boost that is used to reduce output of ripple voltage and ripple current. The methodology is used and combined between P&O MPPT and Lookup Table MPPT. However, the P&O MPPT is the basic system to control the tracking...
This research paper presents an interleaved three-level half-bridge ZVZCS dc-dc converter by using the interleaved technique for reducing the ripple current of the proposed converter and using the dc blocking capacitor for achieving the soft switching condition. The outer switches of each cell can achieve the ZVS condition while the inner switches can operate under the ZCS condition. In addition,...
This research paper introduces a three-output three-level resonant inverter by using phase-shifted pulse-width modulation (PSPWM) technique for controlling all switches and simple power factor correction (PFC) technique for improving the power factor to be near unity. The proposed circuit can provide three outputs simultaneously. In addition, all switches can operate under the zero-voltage switching...
This paper presents an ozone generator by using a full-bridge inverter for applying in prolonging fruits process. The phase-shifted pulse width modulation (PSPWM) is used in the proposed circuit for adjusting the output power of inverter. In addition, the concentration of ozone will be controlled by adjusting the operating frequency of inverter. In order to prove the mentioned principle, the ozone...
This research paper presents a two-output three-level series resonant inverter by using phase-shifted pulse width modulation with a variable frequency control technique. In order to achieve the boundary condition of operation under ZVS for all switches, this paper will analyze this condition which depends on operating frequency and phase-shifted angle between the gate signals of the outer switches...
The paper presents an analysis about the reset time of the primary current for a novel three-phase three-level ZVZCS DC-DC converter using phase-shift PWM strategy. The analysis shows the presence of the ZVS turn-on condition at outer switches of Branches A, B and C, ZVZCS turn-on and turn-off conditions at inner switches of the branches. For ZCS turn-off conditions at inner switches, DC blocking...
This paper presents a two-output three-level inverter (a TOTL inverter) by using phase-shifted pulse-width modulation (PSPWM) to achieve the symmetrical output waveforms. A TOTL inverter is made of 3-legs of neutral point clamped inverter [1] which can provide two-output per one circuit. This is a concept to reduce a size and a number of components when it is compared with one output per one circuit...
A 3-Phase 3-Level DC-DC Converter is used for high electric applications. In this paper, all power semiconductor switches are operated under Soft-Switching conditions. The outer-switches are operated within ZVS conditions by using charge transfer through flying capacitors, while the innerswitches are operated within ZVZCS conditions by using leakage inductances and blocking capacitors. Also, this...
This paper presents the development of a two-output high frequency series-resonant induction heater whose concept is to reduce a size and a number of components. This prototype can control two-unit output power by using 3-legs of full-bridge series-resonant inverter; one leg for common control and others for each independently control. The prototype can provide the rated power of 2.154 kW and 2.245...
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