Internal model control for reduction of bias and harmonic currents in hybrid magnetic bearing
Sign Up to like & getrecommendations! Published in 2019 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2018.05.057
Abstract: Abstract Bias and harmonic currents, which are caused by rotor gravity, mass imbalance and sensor runout, are the dominant disturbances of the hybrid magnetic bearing (HMB) systems. To reject these disturbances and realize the low… read more here.
Keywords: internal model; hybrid magnetic; control; harmonic currents ... See more keywords
Directed harmonic currents near hyperbolic singularities
Sign Up to like & getrecommendations! Published in 2017 at "Ergodic Theory and Dynamical Systems"
DOI: 10.1017/etds.2017.2
Abstract: Let $\mathscr{F}$ be a holomorphic foliation by curves defined in a neighborhood of $0$ in $\mathbb{C}^{2}$ having $0$ as a hyperbolic singularity. Let $T$ be a harmonic current directed by $\mathscr{F}$ which does not give… read more here.
Keywords: directed harmonic; hyperbolic singularities; currents near; near hyperbolic ... See more keywords
Research on the erosion characteristics of air arc on contacts under harmonic current
Sign Up to like & getrecommendations! Published in 2025 at "AIP Advances"
DOI: 10.1063/5.0261037
Abstract: In new energy generation systems, grid-connected inverters generate a large amount of harmonic currents during operation due to inherent factors, such as modulation effects and deadband characteristics. The injection of harmonic currents leads to the… read more here.
Keywords: research erosion; harmonic current; harmonic currents; ablation ... See more keywords
Differential protection for active distribution networks based on the similarity of injected harmonic currents
Sign Up to like & getrecommendations! Published in 2025 at "Measurement Science and Technology"
DOI: 10.1088/1361-6501/ae15b1
Abstract: In response to the complex fault characteristics of inverter-interfaced distributed generation (IIDG) and the impact of their fault ride-through currents on the system, the adaptability of traditional current differential protection is insufficient. This paper constructs… read more here.
Keywords: protection; harmonic currents; active distribution; differential protection ... See more keywords
Research on Radial Vibration Model and Low-Frequency Vibration Suppression Method in PMSM by Injecting Multiple Symmetric Harmonic Currents
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DOI: 10.3390/act13110448
Abstract: Driven by frequency conversion, the windings of a three-phase permanent magnet synchronous motor (PMSM) contain both odd and even harmonic currents. Due to the motor’s pole–slot conductance modulation, the interaction between the magnetic fields generated… read more here.
Keywords: symmetric harmonic; harmonic currents; vibration suppression; vibration ... See more keywords
Harmonic Current Effect on Vibration Characteristics of Oil-Immersed Transformers and Their Experimental Verification
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DOI: 10.3390/en18071673
Abstract: Harmonic currents can intensify transformer vibrations, seriously threatening their mechanical stability and safe operation. Drawing upon this foundation, the present paper undertakes a thorough simulation and experimental investigation into the vibration characteristics of transformers under… read more here.
Keywords: vibration characteristics; harmonic current; harmonic currents; vibration acceleration ... See more keywords
Research on the Suppression Method of Low-Order Harmonic Currents for Active Power Filters Using Quasi-Proportional Resonance Control
Sign Up to like & getrecommendations! Published in 2025 at "Energies"
DOI: 10.3390/en18215697
Abstract: Aiming at the significant challenges faced by active power filters (APFs) in suppressing low-order harmonic currents (such as second and fourth), this paper proposes a rarefaction suppression method based on quasi-proportional resonance (QPR) control. Firstly,… read more here.
Keywords: harmonic currents; control; order harmonic; low order ... See more keywords