Decoupled control of a four-leg inverter via a new 4/spl times/4 transformation matrix
- 1 September 2001
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Electronics
- Vol. 16 (5), 694-701
- https://doi.org/10.1109/63.949502
Abstract
Four-leg (3-phase 4-wire) inverters are developed to power unbalanced/nonlinear three-phase loads. A unique 4/spl times/4 decoupling transformation matrix is used that enables direct transformation between the four degree-of-freedom (DOF) leg-modulation space of the inverter and its corresponding 3-DOF output-voltage space. This is analogous to the well-known 3/spl times/3 "abc-qd" transformation developed for the three-leg inverter. Details of this new 4/spl times/4 "Quad" transform are provided, along with a depiction of the voltage-vectors produced. Advanced synchronous-frame control techniques are applied with this 4-to-3 "abcn-qdo" transform to create a UPS-style inverter with sinewave output. Experimental results for an 8.6 kVA prototype inverter are presented.Keywords
This publication has 9 references indexed in Scilit:
- A four-wire, current-controlled converter provides harmonic neutralization in three-phase, four-wire systemsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Three-phase voltage-source UPS inverter with voltage-controlled current-regulated feedback control schemePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Control of three phase power supplies for ultra low THDPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Analysis and comparison of space vector modulation schemes for a four-leg voltage source inverterPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- A three-phase inverter with a neutral leg with space vector modulationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Modeling of multileg sine-wave inverters: a geometric approachIEEE Transactions on Industrial Electronics, 1999
- Dynamic analysis of current regulators for AC motors using complex vectorsIEEE Transactions on Industry Applications, 1999
- Control topology options for single-phase UPS invertersIEEE Transactions on Industry Applications, 1997
- Discrete pulse modulation strategies for high-frequency inverter systemsIEEE Transactions on Power Electronics, 1993