Modelling and field orientated current control of a two-star 6-phase IPMSM for gearless wheel drives

Arnold, Ruedi; Haerri, Vinzenz V.

doi:10.1109/iemdc.2011.5994655

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…The Matlab/Simulink was used to compare the control stability according to the coordinate transformation in a healthy operation [11,12]. The simulation conditions are as follows: the number of pole pairs = 8, the average value of the field-linkage flux = 14.33 mWb, R = 12.57 mΩ, the average value of the self-inductance is 0.05 mH, the rotating speed is 1000 rpm.…”

Section: Analysis Of Simulation Results Under Healthy Operationmentioning

confidence: 99%

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Control Comparison for the Coordinate Transformation of an Asymmetric Dual Three Phase Synchronous Motor in Healthy and Single-Phase Open Fault States

et al. 2021

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The coordinate transformation method of asymmetric dual three phase synchronous motor (ADTP-SM) is a Double dq transform using two dq-axes and a vector space decomposition (VSD) model method using the orthogonality of ADTP-SM. There are several studies comparing the two methods in a healthy state, but few in a single-phase open fault state. In the healthy, when the VSD model is applied, different harmonic orders of the phase current are projected onto the dq and xy-axes (the axis for controlling harmonics of the phase current), and the two-axes are orthogonal, so it can be controlled stably. In the single-phase open fault state, the same current control logic as in the healthy situation is applied. When applying the Double dq transform, the dq-axis of the fault set fluctuates, and it affects the healthy set, so it cannot be controlled stably. When applying the VSD model, if both the dq-axis and the xy-axis are controlled, the two coordinate systems do not have orthogonality and cannot be stably controlled, due to mutual interference. However, if only the dq-axis is controlled, it can be controlled stably because there is no Cartesian coordinate system other than the dq-axis. In the healthy state and single-phase open fault state, the equation is verified through experiments and simulations, and the control stability according to the coordinate transformation is compared.

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Section: Analysis Of Simulation Results Under Healthy Operationmentioning

confidence: 99%

“…Much research is being conducted to improve this, and it is possible to reduce magnetic coupling between sets by adjusting the skew angle when designing a motor. In the healthy state, the coordinate transform method of ADTP-SM uses the Double dq transform and VSD model [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Control Comparison for the Coordinate Transformation of an Asymmetric Dual Three Phase Synchronous Motor in Healthy and Single-Phase Open Fault States

et al. 2021

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“…The double-dq method implements current control by selecting the dq-axis coordinate system for each set. The VSD method uses the dq-axis for energy conversion and the 6 xy-axis for harmonic current control [9][10][11][12][13]. The current projected on the xy-axis is controlled to be zero.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Mode Control of an Asymmetric Dual Three-Phase Synchronous Motor Under Single-Phase Open Fault

et al. 2022

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This paper proposes hybrid mode control for an asymmetric dual three-phase synchronous motor (ADTP-SM) with separated neutral points in a single-phase open-fault situation. The fault-tolerant control is classified into the maximum torque mode and minimum loss mode. For an arbitrary phase with an open fault, the combination of phase currents for operation in each mode is derived by mathematical analysis. In maximum torque mode operation, a rotational coordinate transformation is proposed to minimize the performance variance according to the speed. In minimum loss mode operation, a stationary coordinate transformation is proposed to control the harmonics of the phase currents. This stationary coordinate transformation can be applied to arbitrary-phase open-fault situations. In addition, the performances with and without harmonic control are compared and analyzed, and the smoothness of the mode conversion is also analyzed. The validity of the proposed coordinate transformations is verified through experiments at various speeds.

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“…The construction of this machine and its size are limited by the dimensions of the E-Bike frame. In the course of earlier studies about multi-phase machines an algorithm of a six-phase control system has been developed [10]. Due to the already existing infrastructure and control system for a six-phase engine, which provides the possibility to test the simulated engines in reality, the mentioned six-phase machine is compared with a three-phase one.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a six- and three-phase interior permanent magnet synchronous machine with flux concentration for an electrical bike

Christen

Haerri

2014

2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion

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This paper presents a comparison between an interior permanent magnet synchronous machine (IPMSM) with two different windings. The two windings subject to this analysis are concentrated six-and concentrated three-phase windings. The focus is put on concentrated windings, because by using this type of winding production costs can be kept low. The mentioned IPMSM is designed for the use in an electrical bike (E-Bike), the size of which is therefore limited by the frame of the bike. This leads to just a few possible combinations in the numbers of slots and poles of the machine. Concentrated six-phase windings have the possibility to reach higher values in the winding factors than three-phase windings of the same machine. The assumption that the six-phase winding generates more torque and reaches a higher efficiency than the three-phase winding is tested in a finite element simulation. The results of this simulation have shown that there can be an increase of the torque production of up to 2 % and a better efficiency of 0.4 % with concentrated six-phase windings with a BLDC commutated current.

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Modelling and field orientated current control of a two-star 6-phase IPMSM for gearless wheel drives

Cited by 5 publications

References 9 publications

Control Comparison for the Coordinate Transformation of an Asymmetric Dual Three Phase Synchronous Motor in Healthy and Single-Phase Open Fault States

Control Comparison for the Coordinate Transformation of an Asymmetric Dual Three Phase Synchronous Motor in Healthy and Single-Phase Open Fault States

Hybrid Mode Control of an Asymmetric Dual Three-Phase Synchronous Motor Under Single-Phase Open Fault

Analysis of a six- and three-phase interior permanent magnet synchronous machine with flux concentration for an electrical bike

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