Cascaded Predictive Control of a Single Power Supply-Driven Four-Level Open-End Winding Induction Motor Drive Without Weighting Factors

A dual-inverter can synthesize four-level space vector using a single dc power supply and a floating capacitor by utilizing an open-end winding induction motor (OEWIM). In this article, a cascaded predictive current control (CPCC) method is proposed for this drive that completely avoids weighting fa...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2021-06, Vol.9 (3), p.2858-2867
Main Authors: Musunuru, Naga Surya Prakash, Srirama, Srinivas
Format: Article
Language:English
Subjects:
Capacitors
Dual inverter with floating dc link
Electric potential
Electric power supplies
Harmonic distortion
Induction motors
Inverters
model predictive control (MPC)
open-end winding induction motor (OEWIM)
Power supply
Predictive control
Reduction
Ruggedness
Sequential control
Stators
Switches
Switching
Torque
variable frequency drives
Voltage
Voltage control
Weighting
Winding
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Summary:A dual-inverter can synthesize four-level space vector using a single dc power supply and a floating capacitor by utilizing an open-end winding induction motor (OEWIM). In this article, a cascaded predictive current control (CPCC) method is proposed for this drive that completely avoids weighting factors. Sequential control of multiobjectives by identifying the order of evaluation of individual objectives is introduced. In this article, motor torque and flux are controlled first followed by voltage balancing of floating capacitor to determine the optimal switching combination of the dual-inverter. To improve computational efficiency of the proposed CPCC, a reference voltage vector is used in this article, in place of current prediction for identifying the candidate switching combination. Ruggedness of the envisaged CPCC is demonstrated through simulations and experimental studies covering speeds below and above motor base speeds of operation. Performance of the proposed CPCC is also compared with the existing model predictive control (MPC) methods to showcase torque ripple reduction, improved current total harmonic distortion (THD), reduced inverter switching frequency, improved inverter efficiency, etc. Above all, due to the simplicity of the proposed CPCC, a drastic reduction in the execution times is achieved when compared to the existing MPC methods.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2020.3014921