Performance analysis and comparison of two fault-tolerant model predictive control methods for five-phase PMSM drives

Abstract

Model predictive current control (MPCC) and model predictive torque control (MPTC) are two derivatives of model predictive control. These two control methods have demonstrated their strengths in the fault-tolerant control of multiphase motor drives. To explore the inherent link, the pros and cons of two strategies, the performance analysis and comparative investigation of MPCC and MPTC are conducted through a fivephase permanent magnet synchronous motor with open-phase fault. In MPCC, the currents of fundamental and harmonic subspaces are simultaneously employed and constrained for a combined regulation of the open-circuit fault drive. In MPTC, apart from the torque and the stator flux related to fundamental subspace, the x-y currents are also considered and predicted to achieve the control of harmonic subspace. The principles of two methods are demonstrated in detail and the link is explored in terms of the cost function. Besides, the performance by two methods is experimentally assessed in terms of steady-state, transition, and dynamic tests. Finally, the advantages and disadvantages of each method are concluded.

General Online Current-Harmonic Generation for Increased Torque Capability With Minimum Stator Copper Loss in Fault-Tolerant Multiphase Induction Motor Drives

“…This will result in less SCL than for the MTPP approach. The non-sinusoidal references may be tracked by, e.g., FCS-MPC [65], hysteresis [45], [46], deadbeat [56] or multi-resonant [47] current control.…”

A novel vector control strategy for sensorless 3φ induction machines under single‐phase fault

“…Additionally, this fault can result from many other types of faults such as IGBT open/short circuit faults, power supply faults, current sensor faults etc. In the field of open-phase FTC strategies, there are different researches focused on FTC of multi-phase machines [13][14][15][16][17], FTC of 3φ Permanent Magnet Synchronous Machines (PMSMs) [18][19][20], and FTC of 3φ IMs [21].…”

PMSM Field-Oriented Control with Independent Speed and Flux Controllers for Continuous Operation under Open-Circuit Fault at Light Load Conditions

“…Furthermore, it has strong robustness against parameter variation. An evaluation was conducted in [18] to compare the fault tolerance control of a five-phase PMSM using model predictive current control (MPCC) and model predictive torque control (MPTC) during open-circuit fault operation. The performance of the two methods under OCF operation was included.…”