Proceedings ArticleDOI
A sensitivity analysis on the fifth and the seventh harmonic current injection for sixth order torque ripple reduction
Ali Najmabadi,Wei Xu,Michael W. Degner +2 more
- pp 1-8
TLDR
In this paper, the sensitivity of the sixth order torque ripple reduction to these four parameters was studied and it was shown that any error in these parameters can cause a reduction in the effectiveness of the compensation.Abstract:
Interior permanent magnet (IPM) electric machines offer higher efficiency and higher torque and power density when compared to other types of electric machines. Like many electric machines, IPM machines also inherently produce unwanted torque ripple along with the desired average torque. Depending on the application, this torque ripple could be problematic. A well-known approach for sixth order torque ripple compensation is based on current shaping via the injection of the fifth and seventh harmonic currents. The construction of the fifth and the seventh harmonic currents needed to cancel the torque ripple requires calibration of the magnitude and the phase of these currents, which translates to four degrees of freedom. Any error in these parameters can cause a reduction in the effectiveness of the compensation. This paper studies the sensitivity of the sixth order torque ripple reduction to these four parameters.read more
Citations
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Journal ArticleDOI
Modelling and comparative dynamic analysis due to demagnetization of a torque controlled permanent magnet synchronous motor drive for energy-efficient electric vehicle.
TL;DR: Modelling and comparative dynamic analysis of a field oriented controlled permanent magnet synchronous motor (PMSM) torque drive employing a hysteresis current controller and a PWM (Pulse Width Modulation) operated current controller is presented, using Euler's integration technique for faster computation and accuracy.
Proceedings ArticleDOI
A Review of Control Methods for PMSM Torque Ripple Reduction
TL;DR: This paper identifies and describes ways to measure or estimate torque ripple, and review control methods, both old and new, that have been proposed to reduce it, to provide information to machine designers to be able to further optimize the performance of an otherwise already optimal machine.
Journal ArticleDOI
A Novel Method for Harmonic Current Injection with Sensor Supported Adaptation on Permanent Magnet Synchronous Machines
TL;DR: The results show that the algorithm can independently optimize the HCI parameters during runtime and reduces the amplitude of the 6th harmonic in the torque by 87% for a permanent magnet synchronous machine.
Proceedings ArticleDOI
Current Harmonics Injection Table to Minimize Torque Ripples for Electric Powertrain Interior Permanent Magnet Motor Over Maximum Torque-Speed Curve
Tan H. Pham,Philippe Wendling +1 more
TL;DR: A parametrized optimization with constraints associated to a current searching method to minimize the torque ripples of an interior permanent magnet powertrain electric motor over the maximum torque-speed curve by injecting current harmonics into the power supply.
Proceedings ArticleDOI
Investigation on sensitivity of optimization parameters of an electrically excited synchronous machine
TL;DR: The results of this paper show that skewing is most effective over all, but changing the shape of tooth in cosine form in selected regions has more effect in the parameter room.
References
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Proceedings ArticleDOI
Cogging Torque Reduction in Permanent Magnet Machines
Luke Dosiek,Pragasen Pillay +1 more
TL;DR: It is shown that the FEA predicted the cogging torque to be nearly eliminated using the two methods, magnet shifting and optimizing the magnet pole arc, but there was some residual cogging in the prototypes due to manufacturing difficulties.
Journal ArticleDOI
Identification and compensation of torque ripple in high-precision permanent magnet motor drives
Joachim Holtz,L. Springob +1 more
TL;DR: A self-commissioning scheme is described which identifies the machine parameters, particularly the torque ripple functions which depend on the angular position of the rotor, and is implemented in a standard microcontroller system without additional hardware.
Journal ArticleDOI
Torque-ripple reduction in PM synchronous motor drives using repetitive current control
TL;DR: In this article, the q-axis current reference has been modified to achieve constant torque in order to improve current tracking in the presence of periodic reference signals and disturbances, where the application of repetitive techniques to the current control in a field-oriented PMSM drive is proposed.
Journal ArticleDOI
High-bandwidth current control for torque-ripple compensation in PM synchronous machines
L. Springob,Joachim Holtz +1 more
TL;DR: It is demonstrated that proportional integral current control exhibits performance limits, even when feedforward compensation of the rotor induced voltage and the stator inductance drop is used.
Journal ArticleDOI
Torque Ripple Reduction of Interior Permanent Magnet Synchronous Motor Using Harmonic Injected Current
TL;DR: In this article, the authors proposed a method to reduce torque ripple using harmonic injected current, where the dominant harmonic order of back EMF was investigated under the consideration of harmonics, and torque ripple was compared with that of sinusoidal current by finite element analysis.
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