Random hysteresis PWM inverter with robust spectrum shaping

Kang, B.J.; Liaw, C.M.

doi:10.1109/7.937473

Cited by 20 publications

(14 citation statements)

References 16 publications

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“…As it is well known that the hysteresis current-controlled (HCC) PWM scheme is widely used to track the command current within a tolerance band owing to its simple and robust characteristics [14], this technique can be easily implemented for generating the PWM signals so as to excite SRM with sinusoidal bipolar excitation. However, the harmonics spectrum of HCC can be varied by many factors, such as the dc-link voltage, self-inductance and load conditions, which results in unpredicted harmonics of radial force and consequently excites vibration and acoustic noise at resonance frequencies.…”

Section: B Hysteresis Current Controlmentioning

confidence: 99%

Investigation of PWMs on vibration and noise in SRM with sinusoidal bipolar excitation

Liu

Hasegawa²,

Pride³

et al. 2012

2012 IEEE International Symposium on Industrial Electronics

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Vibration and acoustic noise are two critical issues for switched reluctance machine (SRM). The abrupt change of phase current mainly contributes to high vibration and noise under conventional unipolar excitation, sinusoidal bipolar excitation considered in this paper can suppress the vibration in SRM. However, to realize the smooth sinusoidal bipolar excitation, different pulse-width modulation (PWM) strategies can be employed. In this paper vibration and acoustic noise of a prototype 6/4 SRM under different load and speed, which employs hysteresis current control (HCC) and space vector pulse-width modulation (SVPWM), is investigated, together with the conventional unipolar excitation, which is modulated by voltage PWM. It shows that the lowest vibration and acoustic noise are obtained if the SRM excited by the sinusoidal bipolar excitation modulated by the SVPWM, regardless the speed and load. However, the HCC technique exhibits the worst vibration and acoustic noise due to random switching frequencies and mechanical resonances, although less sensitive to the load and speed. In contrast, the acoustic noise with the conventional unipolar excitation is sensitive to both load and rotor speed, when the sinusoidal bipolar excitation modulated by SVPWM is employed it is sensitive to the speed but not to the load.

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Section: B Hysteresis Current Controlmentioning

confidence: 99%

Investigation of PWMs on vibration and noise in SRM with sinusoidal bipolar excitation

Liu

Hasegawa²,

Pride³

et al. 2012

2012 IEEE International Symposium on Industrial Electronics

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“…The largest vibrations may occur when the ripple frequencies of the winding current coincide with the resonant frequencies of the stator. Random PWM switching control [23] with proper spectrum shaping [24] may be an effective remedy. This control strategy will be studied in this paper.…”

Section: Electronic Sourcesmentioning

confidence: 99%

“…Details concerning the analysis, design and realisation of all the proposed control schemes are presented in the next Section. [13,14,23,24], the random frequency PWM (RFPWM) is the simplest one. In an RFPWM scheme, the frequency of its triangular carrier v tri (t) is randomly changed according to the employed random signal rðtÞ.…”

Section: Problem Statementmentioning

confidence: 99%

“…In Fig. 4b, f h and f h denote the lowest and highest harmonic frequency components of winding current i i due to RFPWM, and Df e9 f h À f 1 is the frequency range within which the current harmonics should be attenuated as far as possible [23,24]. By randomly varying the triangular carrier frequency, the harmonic spectrum in winding current i 0 1 (taking the first phase winding as an example) under RC CCPWM control can be made to be uniformly distributed, as shown in Fig.…”

Section: Problem Statementmentioning

confidence: 99%

“…For the four-phase 8/6 SRM employed in this paper, the vibration frequency range found from measurement is around 1.43 kHz. To allow the RFPWM be more effective in vibration reduction, the robust spectrum shaping technique [24] is employed here. The proposed RFPWM scheme with robust harmonic spectrum shaping is shown in Fig.…”

Section: Robust Harmonic Spectrum Shapingmentioning

confidence: 99%

See 2 more Smart Citations

Comparative study of switching controls in vibration and acoustic noise reductions for switched reluctance motor

Chai

Lin

Liaw

2006

IEE Proc., Electr. Power Appl.

Self Cite

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A comparative study of vibration and acoustic noise reductions via electronic switching controls for switched reluctance motor (SRM) is presented. First, studies concerning the acoustic noise and vibration sources, their effects and the existing mitigation approaches are given. Then five switching control approaches, which belong to the magnetic and electronic remedies, are proposed and applied to the established SRM drive to comparatively evaluate their effectiveness and limitations. These approaches include random frequency pulse width modulation with harmonic spectrum shaping, turn-on and turn-off angles advanced shift with fixed dwell angle, randomising turn-off angle, current-tail profiling without and with advancing commutation shift. The theoretical basis, implementation and performance evaluation of each approach are presented in detail. Comparative evaluation shows that the hybrid approach combining the current-tail profiling and the commutation advancing can yield the best compromise performance in vibration reduction, acoustic noise reduction and improved energy conversion efficiency.

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Effectiveness Analysis of Control Strategies in Acoustic Noise and Vibration Reduction of PMSM‐Driven Coupled System for EV and HEV Applications

Thakur¹,

Pindoriya²,

Kumar³

et al. 2022

Transportation Electrification

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Random hysteresis PWM inverter with robust spectrum shaping

Cited by 20 publications

References 16 publications

Investigation of PWMs on vibration and noise in SRM with sinusoidal bipolar excitation

Investigation of PWMs on vibration and noise in SRM with sinusoidal bipolar excitation

Comparative study of switching controls in vibration and acoustic noise reductions for switched reluctance motor

Effectiveness Analysis of Control Strategies in Acoustic Noise and Vibration Reduction of PMSM‐Driven Coupled System for EV and HEV Applications

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