Digitally-controlled PWM inverter modulated by multi-random technique with fixed switching frequency

Shyu, Juei-Lung; Liang, Tsorng–Juu; Chen, Jiann-Fuh

doi:10.1049/ip-epa:20010102

Cited by 13 publications

(8 citation statements)

References 15 publications

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“…The comparison between Equation (10) and Equation (1) shows that the calculation of T n+1 with the method in this paper is simpler than the method in [22]. In addition, there is no need to calculate D n+1 .…”

Section: Calculation For Switching Cyclementioning

confidence: 93%

“…As shown in Figure 1, RPWM can mainly be classified as 1) random switching frequency pulse width modulation (PWM) [2], 2) random pulse position PWM, 3) random switching PWM [3], 4) or hybrid random PWM [4]. According to the randomness of the pulse position, it can be divided into random lead-lag [5], random zero vector [6], random pulse center displacement [7], random pulse position [8], random phase-shifted PWM [9], variable delay random PWM [10], asymmetric carrier random PWM [11], single random pulse position [12], and fractal space vector modulation [13]. However, the traditional RPWM cannot suppress specific harmonics selectively, such as the resonance frequency of motors and other loads.…”

Section: Introductionmentioning

confidence: 99%

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A Novel RPWN Selective Harmonic Elimination Method for Single-Phase Inverter

Liu

et al. 2020

Electronics

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In the existing random pule width modulation (RPWM) selective harmonic elimination methods, the formula of switching cycle TN+1 is complex, and the duty ratio DN+1 of the next switching cycle needs to be calculated in advance. However, in the case of unknown TN+1, DN+1 is also difficult to calculate accurately, and the two parameters are based on each other. A novel selective harmonic elimination method in RPWM is proposed in this paper. The PWM voltage pulse is placed at the back of the switch cycle, which simplifies the formula of the switch cycle TN+1 and eliminates the need to calculate the duty ratio DN+1. Two kinds of RPWM selective harmonic elimination ideas are summarized. The general formulas of the switch cycle, the effective random number k, and the upper and lower limits of switch frequency corresponding to k are derived. The spectrum shaping of inverter output voltage can be realized without using digital filter in this method. Simple algorithm, small calculation and easy implementation are characteristics of the proposed method. The simulation and experimental results confirm the ability of the proposed method for reducing harmonics at the specific frequency in power spectral density (PSD).

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Section: Calculation For Switching Cyclementioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

A Novel RPWN Selective Harmonic Elimination Method for Single-Phase Inverter

Liu

et al. 2020

Electronics

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“…The method is based on a random selection of the carrier frequency for each carrier period [13][14][15][16][17][18]. In this technique the randomization of frequency of carrier wave is by taking some times the carrier wave and the other times the inverse of carrier wave.…”

Section: Random Pwm Control Strategymentioning

confidence: 99%

Comparison of Different Control Strategies of Multilevel Inverters Used to Fed a Dual Star Induction Machine

Himour¹,

Yahiaoui²,

Iffouzar³

2020

JESA

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Multiphase machines have interesting advantages in terms of torque ripple and rotor losses which will be lower compared to three-phase machines. Thus, the power of these machines can be done with multilevel inverters that offer good quality energy. The work presented in this paper consists of an analysis of the effect of control techniques of multilevel inverters feeding a dual-star induction machine. The waveform of the output voltage of the inverters depends on the topology of the inverter and its control strategy. We will present a comparative simulation study between three control strategies (PWM, RPWM and simplified SVM) for a three-level diode clamped inverter that feds a dual-star induction machine. The results of simulations will be discussed.

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“…Advanced nonlinear control theory should be adopted to ensure satisfactory performance. Recently, deadbeat control, repetitive control, H1-b loop-shaping control, and many other control theories have been proposed for DC/AC inverter design [3]- [8]. However, most of them can fulfill only one of the performance requirements.…”

Section: Introductionmentioning

confidence: 99%

A Single-Phase DC/AC Inverter using Moving Sliding Manifold Sinusoidal Tracking Control

Chang

Liang

Chen

et al. 2007

IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society

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In this paper, a single-phase DC/AC inverter for uninterruptible power supply using moving sliding manifold (MSM) sinusoidal tracking control is proposed. The characteristic of the MSM over the conventional sliding manifold is capable of ensuring the sliding mode proceeds from an arbitrary initial state and thus achieves the robustness against system uncertainties. The inverter tracking performances of steady-state and transient responses can be improved due to speedup-reaching the sliding manifold. A 60Hz 400W prototype is built with MSM control scheme based on dSPACE DSP by sensing the output voltage for the closed-loop feedback. The experimental results show that low total harmonic distortion (THD) output voltages under resistive load or even under rectifier-RC load and fast transient response subject to step change in load are obtained. Design procedures, computer simulations, and experimental results are provided to demonstrate the performance of the MSM controlled inverter.

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Digitally-controlled PWM inverter modulated by multi-random technique with fixed switching frequency

Cited by 13 publications

References 15 publications

A Novel RPWN Selective Harmonic Elimination Method for Single-Phase Inverter

A Novel RPWN Selective Harmonic Elimination Method for Single-Phase Inverter

Comparison of Different Control Strategies of Multilevel Inverters Used to Fed a Dual Star Induction Machine

A Single-Phase DC/AC Inverter using Moving Sliding Manifold Sinusoidal Tracking Control

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