Analysis, design, and implementation of a random frequency PWM inverter

Liaw, C.M.; Lin, Yiqing; Wu, Chia-En; Hwu, K. I.

doi:10.1109/63.867673

Cited by 70 publications

(26 citation statements)

References 10 publications

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“…PWM 인버터를 제 어할 시 인버터의 고조파 특성은 인버터 변조기법의 주 요 평가요소 중 하나이다. PWM 출력전압에는 스위칭 주파수와 그 배수의 주파수 및 이들 성분들의 측파대 (Sideband)에 해당하는 특정 주파수 대역에서 고조파가 집중적으로 발생한다 [1] . 이런 고조파들은 소음과 진동을 유발하며 전자기파 간섭(EMI) 문제도 발생시키게 된다 [2] .…”

Section: 서 론unclassified

A Novel Random PWM Technique with a Constant Switching Frequency Utilizing an Offset Voltage

Kim¹,

Kim²

2017

The Transactions of the Korean Institute of Power Electronics

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This study proposes a novel random pulse-width modulation (PWM) technique with a constant switching frequency utilizing a random offset voltage. The proposed PWM technique spreads switching harmonics by varying the position of an active voltage vector without a switching frequency variation. The implementation of the proposed PWM technique is simple because it does not require additional hardware and complex algorithm. The proposed random PWM technique is compared with the conventional PWM technique on the factors of harmonic spectrum, total harmonic distortion, and harmonic spread factor to confirm the harmonic spread effect. The validity of the proposed method is verified by simulations and experiments on a three-phase inverter drive system.

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Section: 서 론unclassified

A Novel Random PWM Technique with a Constant Switching Frequency Utilizing an Offset Voltage

Kim¹,

Kim²

2017

The Transactions of the Korean Institute of Power Electronics

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“…Various randomized PWM techniques have also been reported, which redistribute the harmonic energy over a larger frequency range, instead of being concentrated at discrete frequencies [4,5]. This spread in spectrum is favorable for applications where the major concerns are the reduction of acoustic noise and conducted electromagnetic interference (EMI).…”

Section: Introductionmentioning

confidence: 97%

Fuzzy Logic Applied to the Inverter of a SOFC Power Plant

Jurado

2004

Fuel Cells

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Solid‐oxide fuel cell (SOFC) units normally supply power to the local load centers but the excess power can also be exported to the regional power grid, adding to the capacity and stability of the overall grid system. A SOFC power plant is equipped with a pulse width modulation (PWM) inverter. This paper presents the design of a new fuzzy logic regulator for a three‐phase inverter, using the strategy of an inverter flux vector control method. Criteria for designing the fuzzy controller are given and a comparison with the hysteresis method is presented. The flux vector approach is to generate the command pulses for low ripple current and constant switching frequency.

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“…Chaotic modulation strategies have already been utilized to reduce the conducted EMI for power electronic converters and electric drives [22][23][24]. Due to the random-like features, chaotic modulation generates irregularly variable switching frequencies, which could be used to destroy the distinct switching harmonics and produce a continuous power spectrum.…”

Section: Chaotic Modulationmentioning

confidence: 99%

“…By changing the switching frequency chaotically, the distinct switching harmonic peaks with fixed switching-frequency are broken and the power can be spread out within the nearby domain in spectrum. Either the random or chaotic modulation has been studied in various power converters [22][23][24], but those works are mainly focused on one single converter. Due to the existence of three power converters in a TPI bidirectional DC/DC converter, the chaotic modulation strategy should be designed collaboratively for the three energy ports for stable operation.…”

Section: Introductionmentioning

confidence: 99%

The Chaotic-Based Control of Three-Port Isolated Bidirectional DC/DC Converters for Electric and Hybrid Vehicles

et al. 2016

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Three-port isolated (TPI) bidirectional DC/DC converters have three energy ports and offer advantages of large voltage gain, galvanic isolation ability and high power density. For this reason this kind of converters are suitable to connect different energy sources and loads in electric and hybrid vehicles. The purpose of this paper is to propose chaotic modulation and the related control scheme for TPI bidirectional DC/DC converters, in such a way that the switching harmonic peaks can be suppressed in spectrum and the conducted electromagnetic interference (EMI) is reduced. Two chaotic modulation strategies, namely the continuously chaotic modulation and the discretely chaotic modulation are presented. These two chaotic modulation strategies are applied for TPI bidirectional DC/DC converters with shifted-phase angle based control and phase-shifted PWM control. Both simulation and experiments are given to verify the validity of the proposed chaotic modulation-based control schemes.

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Analysis, design, and implementation of a random frequency PWM inverter

Cited by 70 publications

References 10 publications

A Novel Random PWM Technique with a Constant Switching Frequency Utilizing an Offset Voltage

A Novel Random PWM Technique with a Constant Switching Frequency Utilizing an Offset Voltage

Fuzzy Logic Applied to the Inverter of a SOFC Power Plant

The Chaotic-Based Control of Three-Port Isolated Bidirectional DC/DC Converters for Electric and Hybrid Vehicles

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