Abstract
The conventional three-phase split-output inverter (SOI) has been used for grid-connected applications because it does not require dead time and has no shoot-through problems. Recently, the conventional inverter uses the silicon carbide (SiC) schottky diodes for the freewheeling diodes because of its no reverse-recovery problem. Nevertheless, in a practical design, the SiC schottky diodes suffer from current overshoots and voltage oscillations. These overshoots and oscillations result in switching-power losses, decreasing the power efficiency of the inverter. To alleviate this drawback, we present a three-phase SOI using magnetically coupled inductor switching technique. The magnetically coupled inductor switching technique uses one auxiliary diode and coupled inductor for each switching leg in the three-phase SOI. By the operation of the coupled inductor, the main diode current is shifted to the auxiliary diode without the reverse-recovery process. The proposed inverter reduces switching-power losses by alleviating current overshoots and voltage oscillations of SiC schottky diodes. It achieves higher power efficiency than the conventional inverter. We discuss experimental results for a 1.0 kW prototype inverter to verify the performance of the proposed inverter.
Highlights
The standard three-phase voltage source inverter (VSI) has been widely used for grid-connected applications [1,2,3]
We discuss experimental results for a 1.0 kW prototype inverter to verify the performance of the proposed inverter
To solve the above-mentioned shortcomings, we present a three-phase split-output inverter (SOI) using magnetically reference [16]
Summary
The standard three-phase voltage source inverter (VSI) has been widely used for grid-connected applications [1,2,3]. The series resistor in the snubber circuit makes contributes to energy loss, similar to quasi-Z-source inverter (qZSI) presented in [18] is used due to effectively reduced number of switch the reference [13]. The leakage inductors in the voltage oscillations of SiC schottky diodes, reducing switching-power losses. It achieves higher power coupled inductor are used for di/dt control. The proposed inverter mitigates current overshoots and Electronics 2019, 8, x FOR PEER REVIEW voltage oscillations of SiC schottky diodes, reducing switching-power losses. It achieves higher power efficiency than does the conventional inverter. Is better than others in respect of the number of components, switching-power loss, and efficiency
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
