Thermal Analysis of Fifteen-Phase Permanent Magnet Synchronous Motor Under Different Fault Tolerant Operations

Abstract

In order to not change the space vector pulse width modulation (SVPWM) control strategy during one phase fault, the five-phase six-bridge arm SVPWM fault tolerant control method for fifteen-phase permanent magnet synchronous motor (PMSM) is proposed in this paper, and the thermal stress of fifteen-phase PMSM under different fault-tolerant operations is analyzed. Firstly, the control model of the fifteen-phase PMSM based on three dq axes is established, the generation mode of the SVPWM is analyzed, and the speed and current loop PI regulators of the control system are designed. Secondly, the fault-tolerant control principle of the five-phase six-bridge arm is analyzed and compared with the hysteresis control strategy of equal amplitude and minimum stator loss. Thirdly, the 3D model of the fifteen-phase PMSM is established, the steady-state temperature and the transient temperature rise considering operating conditions under different fault tolerant operations are analyzed, and corresponding temperature rise results of the stator armature windings are compared separately. Finally, the experimental platform is established, the phase current waveforms tested under load conditions confirm the theoretical analysis of five-phase six-bridge arms and hysteresis control, and the test results of steady-state and transient temperature rise confirm the correctness of the simulation prediction.

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

“…This implies fewer current DOFs, which, in turn, also means, e.g., simpler current control and better dc-link utilization [312]. If other VSC legs are included, for providing connections (current paths) to the n/l respective neutral points, a single HB VSC of n+n/l phases (legs) results [303], which is represented in Figure 8c.…”

“…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].…”

“…It is common to select l = 3, given the widely spread knowledge and technology for three-phase systems [24,131,132,305,353]. Nevertheless, e.g., l = 5 is sometimes chosen [303,405,421,431,432,469].…”

Vector Control of Permanent Magnet Synchronous Motor Based on MRAS Method

“…Railway and other rail transit systems consume a large amount of energy. The use of energy-saving and efficient permanent magnet synchronous motor in railway traction is of great practical significance for the promotion of environmental protection and emission reduction [9,10]. Therefore, the research and construction of sensorless vector control system of permanent magnet synchronous motor to improve the performance of motor vector control, provide motor technical support for the development of national rail transit, and have long-term value for global energy conservation and emission reduction,…”

Fractional-Slot PMSMs With One Coil Parallel Branches Made Phases—Part I: Investigation Study

“…The influence of the gear ratio on the winding factor, the output and cogging torques, the inductance, and the rotor loss of 3 and 6 phase FSPMSMs has been investigated and experimentally-validated. In [14], Kuang et al considered a thermal analysis of a 10kw 28-pole 30-slot fifteen-phase FSPMSM drive under different faulty scenarios affecting the machine and the associated converter. Steady-state and transient thermal behaviors have been investigated by a finite element analysis and confirmed by experiments.…”