Remedial Robust Control of Five-Phase Fault-Tolerant Induction Motor with Open-End Winding using Reduced-Order Transformation Matrices

Abstract

Five-phase fault-tolerant induction motor (FPIM) with open-end winding (OEW) can offer low torque ripple and it has a merit of high fault-tolerant capability due to its large number of phases. In order to improve the operation performance under an open singlephase. This paper proposes a Remedial Backstepping Control (RBSC) technique for a FPIM-OEW with the ability to run the system before and after fault condition. Hence, the FPIM-OEW losses are decreased, which improves the overall machine efficiency. The proposed RBSC technique lies in the orthogonal reduced-order transformation matrix, which is derived from the fault-tolerant current references, and a new zero-sequence current related to torque ripple. Also, the effect of the open-phase fault on the motor model under the transformation matrix is discussed. The simulation results of the proposed technique under open single-phase are provided, wherein we demonstrate the effectiveness of the proposed strategy with a fast dynamic and steady-state performances as that under healthy operation.

Experimental Validation of Different Control Techniques Applied to a Five-Phase Open-End Winding Induction Motor

“…Stability characteristics: Pole compensation is used for the RFOC technique and Lyapunov stability is used for the BSC strategy in the stability study. Both techniques exhibit steady performance, with BSC showing quicker convergence compared to other techniques such as those presented previously in [2,[30][31][32].…”

“…The fundamental goal of the BSC approach is to convert the equivalent closed-loop system into stable subsystems with order equal one [31,32], which are placed in cascade by the Lyapunov function, which guarantees the stability of each synthesis step [2]. In this paper, the proposed backstepping technique is presented in Figure 5 and it is divided into two steps:…”

“…Simple control strategies are proposed to be implemented on an industrial motor control hardware system with a low computation load e in comparison with the previous works (e.g., those presented in [2,5,23,[29][30][31][32][33][34][35][36]).…”

A Comprehensive Survey on Fault Tolerance in Multiphase AC Drives, Part 1: General Overview Considering Multiple Fault Types

“…From Table 6, using a single FB VSC is a widely-spread solution for n = 5. Single (n+1)-phase HB VSC 8b 5 [361] Single (n+n/l)-phase HB VSC 8c 15 [303] Single n-phase FB VSC for open-end windings 8d 5 [91,94,128,133,193,248,263,267,362,363,403,406 An interesting, although less usual, multiphase topology is that based on series connection of the dc links of several three-phase VSCs (see Figure 8e) [409,484]. This can be particularly attractive for off-shore wind farms using a high-voltage dc connection, allowing the use of generators and semiconductors with reduced voltage rating and avoiding bulky grid-side transformers [409,484].…”