Generalized Switching Modification Method Using Carrier Shift for DC-link Capacitor RMS Current Reduction in Real-Time Implementation

Choi, Ki-Young; Kim, Sang-Il; Jung, Sang-Min; Kim, Rae-Young

doi:10.1109/tie.2018.2873160

Cited by 15 publications

(13 citation statements)

References 39 publications

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“…The EGW PWM enables active control of the harmonic magnitudes as well as their phase angles. When compared to existing harmonic suppression methods using the conventional modulation technique [18]- [20], it provides a potential of suppressing harmonic of any frequency and magnitude.…”

Section: B Equal-gate-width Pwmmentioning

confidence: 99%

“…The output current idc of the AC-DC converter is also controlled with its reference iref [g] given by the system-level controller. With measured currents id, iq, voltage references vd, vq, and modulation index M, the information of the fc-3f0 harmonic component can be derived, with its magnitude Idc1,-3 [g] and its phase angle θdc1,-3 [g] from (19) and (20). The fundamental frequency (f0) can be obtained from a machine speed sensor.…”

Section: Busmentioning

confidence: 99%

“…(37) To achieve the phase angle difference of 180 o between the two harmonics, with (20), the phase angle of the EGW PWM carrier signal should be set as ( )…”

Section: Busmentioning

confidence: 99%

See 2 more Smart Citations

Using DC–DC Converters as Active Harmonic Suppression Device for More Electric Aircraft Applications

Wang

Yang

Hussaini

et al. 2022

IEEE Trans. Ind. Electron.

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Harmonics generated from power electronic converters will impose significant power quality challenges to the electric grid onboard future aircraft. In this paper, we propose an innovative modulation scheme that enables using a buck-boost DC-DC converter as a harmonic absorber. To demonstrate the effectiveness of the proposed method, a hybrid power generation system involving a high-speed electrical generator and a high voltage battery is introduced. The electrical generator is connected to a DC bus through an AC-DC converter and the battery to the DC bus with a DC-DC converter. For the studied hybrid power generation system, it is identified that the first carrier frequency side-band harmonic (fc-3f0) from the AC-DC converter is most relevant and is targeted for cancellation. For the control of the DC-DC converter, a new modulation technique, called equal-gate-width (EGW) modulation is proposed. It allows active control of the magnitude and phase angle of some specific harmonic components from a DC-DC converter. By properly tuning the phase angle and amplitude, the controlled harmonics can thus be used to cancel harmonics from other converters on a common DC bus. Without losing generality, the paper focuses on the development of this specific harmonic cancellation scheme and the effectiveness of our proposed methods has been demonstrated using experimental results.

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Section: B Equal-gate-width Pwmmentioning

confidence: 99%

Section: Busmentioning

confidence: 99%

See 1 more Smart Citation

Using DC–DC Converters as Active Harmonic Suppression Device for More Electric Aircraft Applications

Wang

Yang

Hussaini

et al. 2022

IEEE Trans. Ind. Electron.

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show abstract

“…In [15], the authors developed a modified PWM scheme to minimize DC-link harmonics when a boost converter is connected to a 2-level DC-AC converter. In [16], DC-link harmonics are suppressed by a real-time calculation of phaseshift angle on the DC-DC converter.…”

Section: Ac/dcmentioning

confidence: 99%

“…In these publications, most of the methods only focus on suppressing harmonics in the second switching frequency. For example, in [15] and [16], switching frequency of the DC-DC converter are fixed as twice of that on the AC-DC converter. However, first band harmonics are also nonnegligible on DClink harmonics.…”

Section: Ac/dcmentioning

confidence: 99%

Suppression of First Sideband Switching Harmonics Using DC–DC Converters With an Advanced Modulation Scheme

Wang

Yang

Wang

et al. 2022

IEEE Trans. Transp. Electrific.

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The common DC bus concept has become an attractive solution for future aircraft electrical power systems. This paper considers the case where a battery connected DC-DC converter and a permanent magnet generator connected AC-DC converter are supplying a common dc bus. Applying a proper modulation scheme for DC-DC converters, suppression of the first-band harmonics (fc±3f0) from the AC-DC converter can be achieved. The proposed harmonic suppression scheme essentially uses the fact that two sinusoidal waveforms with phase shift of π will counteract to each other. For an aircraft engine driving generator, the fundamental frequency f0 is time-varying and dependent on aircraft engine speeds. This time-varying f0 is normally derived with a resolver and some measurement error is expected. To ensure the effectiveness of the proposed harmonic suppression scheme, an enhanced pulse width modulation (PWM) compensation scheme has been proposed and implemented every fundamental cycle when the rotor position is detected a zero crossing. The effectiveness of the proposed suppression scheme is validated by experimental results with selected fc-3f0 component for one DC-DC converter.

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Lifetime Extension of DC-Link Capacitors in Three-Level Inverters Based on the Neutral-Point Current

Choi,

Bae,

Lee

2024

J. Electr. Eng. Technol.

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Generalized Switching Modification Method Using Carrier Shift for DC-link Capacitor RMS Current Reduction in Real-Time Implementation

Cited by 15 publications

References 39 publications

Using DC–DC Converters as Active Harmonic Suppression Device for More Electric Aircraft Applications

Using DC–DC Converters as Active Harmonic Suppression Device for More Electric Aircraft Applications

Suppression of First Sideband Switching Harmonics Using DC–DC Converters With an Advanced Modulation Scheme

Lifetime Extension of DC-Link Capacitors in Three-Level Inverters Based on the Neutral-Point Current

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