A DPWM-Based Quasi-Constant Switching Frequency Control for Full ZVS Range Three-Phase Inverter With Reactive Power Transfer Capability

In this article, a quasi-constant switching frequency zero voltage switching (ZVS) control strategy is proposed for three-phase grid-connected inverters. Full ZVS range can be achieved for all the switches at any load, modulation index, and power factor using discontinuous pulsewidth modulation. No...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 70; no. 5; pp. 4912 - 4921
Main Authors Chen, Jianliang, Han, Yanguo, Han, Qiang, Liu, Qing
Format Journal Article
LanguageEnglish
Published New York IEEE 01.05.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Circuits
Control systems
Current zero behaviour
Dynamic response
Electric potential
Energy conversion efficiency
Frequency control
Inductors
Inverters
Modulation
MOSFETs
Power factor
Power transfer
Pulse duration
Quasi-constant switching frequency
Reactive power
Switches
Switching
Switching frequency
three-phase inverter
Voltage
Zero voltage switching
zero voltage switching (ZVS)
Online AccessGet full text

Cover

More Information
Summary:In this article, a quasi-constant switching frequency zero voltage switching (ZVS) control strategy is proposed for three-phase grid-connected inverters. Full ZVS range can be achieved for all the switches at any load, modulation index, and power factor using discontinuous pulsewidth modulation. No additional high-frequency sensor or auxiliary circuit is needed. The switching frequency is constant at steady-state. It does not change with the phase angle or the power factor, but it varies with the modulation index, grid RMS voltage, and current. The frequency can be easily calculated in a digital controller based on current ripple prediction instead of current zero-crossing detection. The turn- on loss is eliminated so the inverter can operate at a high switching frequency, especially by using wide band-gap devices. The conversion efficiency, power density, cost, and dynamic response of the inverter can all be improved. A 3.3 kVA experimental prototype using SiC MOSFET s interfacing 400 V dc link with three-phase 110 V ac grid is developed to verify the effectiveness of the proposed control strategy.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2022.3190888