Damping torsional interharmonic effects of large drives

Schramm, Simon; Sihler, C.; Song-Manguelle, Joseph; Rotondo, Paola

doi:10.1109/ipemc.2009.5157436

Cited by 10 publications

(24 citation statements)

References 6 publications

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“…9(b), where the associated interharmonics can be observed as well as the fundamental frequency and the characteristic harmonics. As it can be observed, the interharmonic frequency locations obtained using the theoretical analysis in (19) are in good agreement with MATLAB simulation results shown in Fig. 9(b).…”

Section: B Measurementsupporting

confidence: 84%

“…As a result of the multiplication in (18), the DC-link current oscillations coming from the inverter output side will appear as the ASD input current interharmonics. The corresponding interharmonic frequencies can be written as (19) and (20) for the symmetrical and the asymmetrical strategies, respectively. Fig.…”

Section: Harmonic Transfer At Rectifier Levelmentioning

confidence: 99%

“…4 shows the selected modulation strategy at the inverter, where the switching frequency is kept constant at 5 kHz during the output frequency f o variations from 5-50 Hz. For the sake of clarification, the drive input current interharmonic locations, obtained using (19) and (20), are plotted in Fig. 5(a) and (b), only for the output frequency f o range of 30-50 Hz.…”

Section: Harmonic Transfer At Rectifier Levelmentioning

confidence: 99%

See 2 more Smart Citations

Characterization of Input Current Interharmonics in Adjustable Speed Drives

Soltani

Zare

Loh

et al. 2017

IEEE Trans. Power Electron.

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This paper investigates the interharmonic generation process in the input current of double-stage Adjustable Speed Drives (ASDs) based on voltage source inverters and front-end diode rectifiers. The effects of the inverter output-side low order harmonics, caused by implementing the double-edge symmetrical regularly sampled Space Vector Modulation (SVM) technique, on the input current interharmonic components are presented and discussed. Particular attention is also given to the influence of the asymmetrical regularly sampled modulation technique on the drive input current interharmonics. The developed theoretical analysis predicts the drive interharmonic frequency locations with respect to the selected sampling strategies. Simulation and experimental results on a 2.5 kW ASD system verify the effectiveness of the theoretical analysis.

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Section: B Measurementsupporting

confidence: 84%

Section: Harmonic Transfer At Rectifier Levelmentioning

confidence: 99%

Section: Harmonic Transfer At Rectifier Levelmentioning

confidence: 99%

See 1 more Smart Citation

Characterization of Input Current Interharmonics in Adjustable Speed Drives

Soltani

Zare

Loh

et al. 2017

IEEE Trans. Power Electron.

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“…There are various methods and equipments to measure or detect torsional vibrations, like accelerometers [5] antonino.digerlando@polimi.it, khaled.elshawarby@polimi.it, gianmaria.foglia@polimi.it, roberto.perini@polimi.it acceleration sensors [6]. Oscillations can be also observed or detected, without direct mechanical measurement, from the motor speed, torque, flux or current [7], or from the error in the dc voltage or the generated power [2] [8].…”

Section: Introductionmentioning

confidence: 99%

“…A classical measure to reduce the torque harmonics amplitude is to shift harmonics to a higher order. It can be done by either increasing the number of pulses or the switching frequency of the converters or by increasing the number of output voltage levels [9] [10]. However, such methods have some drawbacks like increasing the switching losses, the cost and complexity of the converter.…”

Section: Introductionmentioning

confidence: 99%

Torsional Vibration Mitigation by Harmonic Inversion through SPWM Carrier Signal Control

Gerlando

ElShawarby

Foglia

et al. 2018

2018 XIII International Conference on Electrical Machines (ICEM)

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The paper analyses torsional vibrations caused by electromagnetic torque harmonics in permanent magnet synchronous generators. A vibration mitigation method is proposed based on changing the phase angle of the carrier signal of sinusoidal PWM in order to invert the phase of the torque harmonic causing resonance. Since the frequency has not changed, the system is still in resonance. Thus, after a given time, the torque harmonic should be inverted again. The process is repeated as long as the system is at or near resonance. A criterion is presented to select the exact phase shift of the carrier needed in order to invert the torque harmonic. A method to calculate both the toggle time needed and the frequency range to apply such technique is presented. With the mitigation technique applied, two cases are considered on Matlab/Simulink, namely sustained operation at resonant frequency and accelerating the machine over some critical points.

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An Algebraic Algorithm for Motor Voltage Waveform Prediction in Dual-LCI Drives With Interconnected DC-Links

Mohamadian

Castellan

Tessarolo

et al. 2016

IEEE Trans. Energy Convers.

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Load-commutated inverters (LCI's) are often used to supply dual-three-phase synchronous motors in high-power variable-speed applications. A pair of LCIs is used in this arrangement to feed the two motor three-phase winding sets. In order to cope with inter-harmonic issues, a drive configuration with an interconnection of the two LCI dc-links has been proposed. In this paper, such a drive design is shown to produce an increased voltage stress on motor windings compared with traditional configurations. The problem is investigated in the paper by proposing an algebraic algorithm capable of predicting the steady-state voltage waveform applied to the motor terminals and arising between the star points of the two winding sets. Unlike conventional dynamic simulations, the proposed approach gives practically instantaneous results, making it possible to quickly investigate a wide number of possible operating conditions. Furthermore, it requires a limited knowledge of system parameters, which are often hardly available. Its reliability and accuracy are assessed by comparison with measurements on a test drive system and examples are given of the method application to the sizing of motor insulation system

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Damping torsional interharmonic effects of large drives

Cited by 10 publications

References 6 publications

Characterization of Input Current Interharmonics in Adjustable Speed Drives

Characterization of Input Current Interharmonics in Adjustable Speed Drives

Torsional Vibration Mitigation by Harmonic Inversion through SPWM Carrier Signal Control

An Algebraic Algorithm for Motor Voltage Waveform Prediction in Dual-LCI Drives With Interconnected DC-Links

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