Natural Fault Tolerance of a Nine-Phase Induction Motor Drive Operating at Variable Frequency and Switched Supply Sequence

Drozdowski, Piotr; Cholewa, Dariusz

doi:10.1109/wzee48932.2019.8979746

Cited by 2 publications

(6 citation statements)

References 8 publications

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“…Multiphase induction machines with the second type of winding can practically work at the supply sequence number m = 1. Such a machine can be designed with almost sinusoidally distributed windings, having all the advantages of fault tolerance of multiphase induction machines [4,17,22,23,25,26].…”

Section: Induced No-load Voltagementioning

confidence: 99%

“…As mentioned in Section 1, the control idea is derived from the speed control method presented in [2,4]. Instead of a speed controller, a DC voltage controller is applied.…”

Section: The Control Systemmentioning

confidence: 99%

“…A multiphase induction machine (MIM) with number of phases M > 3 can operate as a motor or a generator. The idea of MIM operation as a stator converter-controlled multiphase generator [1] was created on the basis of automatic speed control of the multiphase squirrel-cage induction motor presented in [2][3][4]. The motivation for the use of MIM as an induction generator stemmed from the properties of the machine during motor operation and regenerative braking presented in [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…The idea of MIM operation as a stator converter-controlled multiphase generator [1] was created on the basis of automatic speed control of the multiphase squirrel-cage induction motor presented in [2][3][4]. The motivation for the use of MIM as an induction generator stemmed from the properties of the machine during motor operation and regenerative braking presented in [2][3][4]. These were mainly the ability to work with broken stator phases and to work with a constant frequency and voltage at several different characteristic speeds.…”

Section: Introductionmentioning

confidence: 99%

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Voltage Control of Multiphase Cage Induction Generators at a Speed Varying over a Wide Range

Drozdowski

Cholewa

2021

Energies

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The subject of this publication is a method of controlling the DC voltage of a PWM rectifier supplied by a multiphase cage induction generator with the number of stator phases greater than three operating in a wide range of driving speeds. Voltage regulation is performed by changing the frequency and amplitude of the stator voltages with simultaneous switching of the phase sequence of these voltages. The step change of the voltage sequence is made in the designated ranges of the generator speed, which enables the stabilization of the output voltage in a wide range from the minimum speed of about 25% of the rated speed. Such sequence switching changes the number of pole pairs produced by the winding for each supply sequence. The difference compared to multi-speed induction machines is that, in the presented solution, there is only one winding, not a few, which enables good use of the machine’s magnetic core in the same dimensions as for the three-phase machine of a similar power. Steady-state characteristics and dynamic operation were obtained using laboratory measurements of a standalone nine-phase induction generator. The automatic control system maintained the output voltage at the set level, regardless of the generator load and driving power.

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Section: Induced No-load Voltagementioning

confidence: 99%

“…As mentioned in Section 1, the control idea is derived from the speed control method presented in [2,4]. Instead of a speed controller, a DC voltage controller is applied.…”

Section: The Control Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Voltage Control of Multiphase Cage Induction Generators at a Speed Varying over a Wide Range

Drozdowski

Cholewa

2021

Energies

Self Cite

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show abstract

“…In this context, some recent works have suggested the use of a control scheme that remains valid both before and after the fault occurrence. This alternative approach skips the aforementioned stages two and three and has been baptised as natural fault tolerance, tested in six-phase systems with predictive strategies [8] and FOC [9], and also extended to nine-phase systems [10]. The core idea in these works is to maintain the x-y current control in open-loop mode in order to avoid the conflict with d-q controllers in post-fault situation.…”

Section: Introductionmentioning

confidence: 99%

Automatic Fault-Tolerant Control of Multiphase Induction Machines: A Game Changer

et al. 2020

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Until very recently, the fault tolerance in multiphase electric drives could only be achieved after fault localization and a subsequent modification of the control scheme. This scenario was profoundly shaken with the appearance of the natural fault tolerance, as the control reconfiguration was not required anymore. Even though the control strategy was highly simplified, it was still necessary to detect the open-phase fault (OPF) in order to derate the electric drive and safeguard its integrity. This work goes one step beyond and suggests the use of an automatic fault-tolerant control (AFTC) that also avoids the detection of the OPF. The AFTC combines the natural fault-tolerant capability with a self-derating technique, finally obtaining a hardware-free software-free fault tolerance. This achievement changes completely the rules of the game in the design of fault-tolerant drives, easing at the same time their industrial application. Experimental results confirm in a six-phase induction motor (IM) drive that the proposed AFTC provides a simple and safe manner to add further reliability to multiphase electric drives.

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Natural Fault Tolerance of a Nine-Phase Induction Motor Drive Operating at Variable Frequency and Switched Supply Sequence

Cited by 2 publications

References 8 publications

Voltage Control of Multiphase Cage Induction Generators at a Speed Varying over a Wide Range

Voltage Control of Multiphase Cage Induction Generators at a Speed Varying over a Wide Range

Automatic Fault-Tolerant Control of Multiphase Induction Machines: A Game Changer

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