Recent Advances in Model Predictive and Sliding Mode Current Control Techniques of Multiphase Induction Machines

Abstract

Multiphase machines have attracted the attention of the research and industrial communities due to their advantages, namely better power distribution and fault-tolerant capabilities without extra hardware. However, the multiphase machine requires high-performance control strategies to take advantage of these features. From this perspective, the field-oriented control with the inner current control loop that uses using an explicit modulation stage has been considered the benchmark solution thanks to the reduced harmonic distortion obtained with this regulation strategy. Nevertheless, nonlinear controllers, thanks to their inherent nature, allow exploiting the extra multiphase capabilities in a simplified manner. Consequently, this paper aims to concentrate and discuss the latest developments on nonlinear current control of two of the most popular multiphase electric drive configurations, five-phase and six-phase. Then, this paper covers mainly finite-control-set model predictive control and their variations. Moreover, sliding-mode control is also explained. Finally, this paper includes experimental assessments of the most recent nonlinear current control techniques considering steady-state and transient conditions, stability and performance analysis.

Electric Power Flow Control in Double Three-Phase Machines without Shift between Magnetic Axes

“…Besides failure immunity, phase current reduction, and lower torque ripple, properties that are typically addressed in the literature [2][3][4][5][6], multi-phase machines offer some other sophisticated possibilities unattainable by classical three-phase machines. The literature often addresses these possibilities as an increase in the degree of freedom that can be "unlocked" by the proper design and control of multi-phase machines [7][8][9].…”

Predictive Control of Multi-Phase Motor for Constant Torque Applications

“…In the case of RSACs, these characteristics can be exploited to allow for smoother operation of the compressor, benefiting the whole installation. However, the multi-phase IM requires adequate control of the additional degrees of freedom introduced by the extra number of phases [6].…”

Winding Design and Efficiency Analysis of a Nine-Phase Induction Machine from a Three-Phase Induction Machine

“…The green agenda has directly influenced the research for higher efficiency of allelectric machines design and applications. Even though three-phase machine configuration has been and is still the standard choice for industrial applications, in the past decades, machines with a higher number of phases (q > 3), namely multiphase machines, have appeared as an exciting alternative [1]. Multiphase machines have several advantages compared with classical ones, such as better current/power per phase distribution [2], lower torque ripple than three-phase machines [3] and intrinsic fault-tolerance capabilities [4].…”