Techniques for Conditioning Bit-Stream Signals for Single-Phase Power Electronics Applications

Bradshaw, Jonathan; Madawala, Udaya K.; Patel, Nitish

doi:10.1109/tpel.2010.2090901

Cited by 11 publications

(6 citation statements)

References 20 publications

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“…The voltage in these formulas is the line voltage (V ab ) that is obtained by subtracting two relevant phase voltages such as: a and b. By considering the specific form of the stepped voltage of a three-level inverter, step function, defined in (7), can be used to produce…”

Section: First Proposed Methodsmentioning

confidence: 99%

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Fast closed‐form solution of line‐to‐line voltage total harmonic distortion for three‐level inverters

Farokhnia

Ehsani

Vadizadeh

et al. 2013

IET Power Electronics

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Harmonic emission to the network must be restricted below the predefined limits, avoiding power quality problems. Total harmonic distortion (THD) is a well-known criterion, which is used to determine harmonic content of each waveform, and extracting its exact value is very important. Three-level inverters produce a significant amount of harmonics and the exact closedform expression for their line-to-line voltage THD has not yet been derived. All presented methods in this regard are based on an approximate approach. This study calculates line-to-line voltage THD of a three-level inverter by two different methods and presents their relevant formulas. The first method is usable for any number of controlled PWM switching angles, but the second method is limited to low number of switching angles. By the presented mathematical formulas in this study, the THD is computed simply, accurately and rapidly. The proposed methods are compared with the conventional methods and their advantages are verified by simulation and experimental results.

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Section: First Proposed Methodsmentioning

confidence: 99%

“…The common topologies which are used in three-level inverter include neutral point clamped [1][2][3][4][5][6] and full-bridge inverter [7,8]. The full-bridge structure needs fewer components to produce the same output waveform.…”

Section: Introductionmentioning

confidence: 99%

Fast closed‐form solution of line‐to‐line voltage total harmonic distortion for three‐level inverters

Farokhnia

Ehsani

Vadizadeh

et al. 2013

IET Power Electronics

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“…Technical methods that can produce multi-frequencies signal mainly include bitstream method [10] and pseudorandom method [11]. The bit stream method uses more complicated algorithm to generate multi-frequencies signals.…”

Section: Transmitter Systemmentioning

confidence: 99%

A Portable Frequency Domain Electromagnetic System for Shallow Metal Targets Detection

Qu¹,

Li²,

Fang³

et al. 2017

PIER M

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Abstract-In this paper, a portable frequency domain electromagnetic system CEM-2 is presented for shallow metal targets detection. This paper discusses the detection principle of frequency domain electromagnetic system, introduces hardware implementation, presents test results of each module, and gives the system's imaging results in field tests. Sinusoidal pulse width modulation technique is employed in this system to produce single-frequency or multi-frequencies synthetic electromagnetic signals with signal to noise ratio of about 85 dB. After integration, the CEM-2 system's in-phase noise level is about 90 ppm while the quadrature response is about 100 ppm. The experiment results of CEM-2 agree well with the simulation ones both from signatures and amplitudes. The experiment for detecting targets of different sizes and materials conducted in field indicates that CEM-2 system can be used to distinguish metallic and ferrous objects.

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“…These include frequency modulation [13], [24]- [26], random modulation [27]- [32], and pulse position modulation [33], among others. In [34], the optimization of a spread-spectrum method for wireless power transfer is discussed; this paper presents and discusses the design of an RF amplifier that is particularly suited for this, along with other spread spectrum methods.…”

Section: Introductionmentioning

confidence: 99%

Quad-switch push-pull (QSPP) RF amplifier with direct, simultaneous modulation of phase and pulse position for spread-spectrum power applications

Avestruz

Chang

Leeb

2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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We present a new RF power amplifier for spread spectrum applications, including wireless power transfer with low electromagnetic interference (EMI). The amplifier delivers half sine wave voltage pulses of either polarity through direct pushpull modulation of phase and pulse position. EMI is a concern not only from a regulatory perspective, but also in medical and other critical environments. The voltage pulses can be optimized by a variety of methods for specific spectral characteristics to create a current, and hence a high frequency magnetic field with a spread spectrum. The topology takes advantage of the inherent characteristics of GaN FET devices.

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Techniques for Conditioning Bit-Stream Signals for Single-Phase Power Electronics Applications

Cited by 11 publications

References 20 publications

Fast closed‐form solution of line‐to‐line voltage total harmonic distortion for three‐level inverters

Fast closed‐form solution of line‐to‐line voltage total harmonic distortion for three‐level inverters

A Portable Frequency Domain Electromagnetic System for Shallow Metal Targets Detection

Quad-switch push-pull (QSPP) RF amplifier with direct, simultaneous modulation of phase and pulse position for spread-spectrum power applications

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