Fault Tolerant Control of 3ph PMSM With Inter-Turn Faults

Foitzik, Simon; Doppelbauer, Martin

doi:10.1049/icp.2021.1030

Cited by 2 publications

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“…However, the proposed method is not suitable for single three-phase PMSMs and relies on a triple three-phase stator winding. In [12], we present a fault tolerant control scheme for PMSMs with distributed windings and a characteristic fault current, which is larger than the maximum phase current. The principle of a controlled adaption of the operating point is shown with simulation results, which illustrates the reduction of the generated heat of an inter-turn fault.…”

Section: Introductionmentioning

confidence: 99%

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Fault tolerant control of a three‐phase PMSM by limiting the heat of an inter‐turn fault

Foitzik

Doppelbauer

2021

IET Electric Power Appl

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Inter-turn faults are most commonly the initial stator winding fault in power trains with Voltage Source Inverters. Without counteractions, these faults can propagate and cause catastrophic failures in safety critical applications like all-electric aircraft. The propagation of an inter-turn fault can be reduced, by limiting the local temperature at the fault. In this article, a fault tolerant control scheme is designed and validated, which reduces the heat of an inter-turn fault by a controlled adaption of the operating point. The control strategy utilizes the hyperbolas of constant torque and the controller design is based on a linear time-invariant system description. A machine learning regression is used for the online heat estimation and a 3D lumped-parameter model to evaluate the thermal effectiveness. To test the control scheme, an inter-turn fault is actively switched, which generates the local heat equal to 13% of the overall stator copper losses. The control scheme adopts the operating point within 30 electric periods, which reduces the generated heat of the interturn fault by 70%. This causes a temperature reduction at the fault locally from 367°C to 175°C, which extends the approximated insulation life from 30 s to 5000 h.

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Section: Introductionmentioning

confidence: 99%

“…In this article, we extend the approach presented in [12] by a thorough analysis for the subsequent validation at the test bench. The limitation and accuracy of the heat estimation are evaluated for the test bench operation and the performance of the fault detection is discussed.…”

Section: Introductionmentioning

confidence: 99%

Fault tolerant control of a three‐phase PMSM by limiting the heat of an inter‐turn fault

Foitzik

Doppelbauer

2021

IET Electric Power Appl

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Fault Tolerant Control by Asymmetric Operation of Double Three-Phase PMSMs with Inter-Turn Faults

Foitzik

Doppelbauer

2020

2020 International Conference on Electrical Machines (ICEM)

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Inter-turn faults are most likely the initial stator winding fault in variable speed drive systems with Voltage Source Inverters. The machine must stay within its thermal requirements locally at the fault to prevent its propagation. In this paper, we present a fault tolerant control scheme for a double three-phase Permanent Magnet Synchronous Machine which minimizes the propagation of the fault by adapting the operating points of both systems independently. We estimate the generated heat by the inter-turn fault with a machine learning regression. If the estimated heat of the faulty system is greater than a definite value, the operating point of this system is adapted until the estimated heat is below the limit. The healthy system is used to compensate the torque reduction of the faulty system. We validated the concept of the control scheme with a Finite Element Analysis simulation. The presented double threephase machine can compensate 13.9 W at nominal torque, which is an improvement of 74% compared to the equivalent single three-phase machine with the same heat limitation strategy. This heat reduction equals a temperature reduction of 111.2 K at fault locally.

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Fault Tolerant Control of 3ph PMSM With Inter-Turn Faults

Cited by 2 publications

References 0 publications

Fault tolerant control of a three‐phase PMSM by limiting the heat of an inter‐turn fault

Fault tolerant control of a three‐phase PMSM by limiting the heat of an inter‐turn fault

Fault Tolerant Control by Asymmetric Operation of Double Three-Phase PMSMs with Inter-Turn Faults

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