Bipolar Phase Shift Modulation Single-Stage Audio Amplifier Employing a Full Bridge Active Clamp for High Efficiency Low Distortion

Xu, Jianping; Zhong, Shaomin

doi:10.1109/tie.2020.2967727

Cited by 5 publications

(4 citation statements)

References 19 publications

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“…The research results were validated through a prototype with an output power of 200kHz and 250W. It demonstrates the effectiveness of the proposed BPSM • FBAC-SSI method in improving the efficiency of audio amplifiers and reducing distortion [10]. Chandrakar R et al proposed an enhanced system for automatic motion object detection and tracking using RBF-FDLNN and CFR algorithms.…”

Section: Related Workmentioning

confidence: 87%

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Audio Style Conversion Based on AutoML and Big Data Analysis

Chi

2024

IJACSA

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In the field of audio style conversion research, the application of AutoML and big data analysis has shown great potential. The study used AutoML and big data analysis methods to conduct deep learning on audio styles, especially in style transitions between flutes and violins. The results show that using iterative learning for audio style conversion training, the training curve tends to stabilize after 100 iterations, while the validation curve reaches stability after 175 iterations. In terms of efficiency analysis, the efficiency of the yellow curve and the green curve reached 1.05 and 1.34, respectively, with the latter being significantly more efficient. This study achieved significant results in audio style conversion through the application of AutoML and big data analysis, successfully improving conversion accuracy. This progress has practical application value in multiple fields, including music production and sound effect design.

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Section: Related Workmentioning

confidence: 87%

“…It uses ReLU activation function to train the autoencoder and removes the output layer after completion. Then it uses the output of the hidden layer as input in the AutoML model, as shown in Eq (10)…”

mentioning

confidence: 99%

Audio Style Conversion Based on AutoML and Big Data Analysis

Chi

2024

IJACSA

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“…Its theoretical efficiency of 100% is often transformed into practical efficiencies of 95% and above in applications. Many controllers have been designed and developed for Class-D amplifiers to enhance intrinsic low THD and noise at output levels [31,32].…”

Section: Introductionmentioning

confidence: 99%

A Novel Fundamental Frequency Switching Operation for Conventional VSI to Enable Single-Stage High-Gain Boost Inversion with ANN Tuned QWS Controller

et al. 2021

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Single-stage high-gain inverters have recently gained much research focus as interfaces for inherent low voltage DC sources such as fuel cells, storage batteries, and solar panels. Many impedance-assisted inverters with different input stage configurations have been presented. To decrease passive component sizes, these inverters operate at high-frequency switching. The high-frequency switching optimizes the passive component sizes but introduces many challenges in the form of high-frequency inductor design, control complexity, high-frequency gate driver requirements, high semiconductor losses, and electromagnetic interferences. This article proposes a novel fundamental frequency switching operation for the conventional voltage source inverters (VSI) to operate as a single-stage high-gain inverter. As the novel operational strategy changes the behavior of conventional VSI from buck inverter to a boost inverter, it is hereafter termed as a novel inverter. By virtue of the operation strategy, switches withstand peak inverse voltage (PIV) equal to DC link voltage, unlike other impedance assisted boost inverters where PIV across switches is the amplified DC voltage. The proposed inverter can invert low-level DC voltage to high voltage AC with low total harmonic distortion (THD) in a single stage without the help of any external filter. A novel quarter-wave symmetric phase-shift controller is proposed for variable voltage and frequency control of proposed inverters tuned by a back-propagation thin-plate-spline neural network (BPTPSNN). Mathematical analysis with experimental validation is presented. Experimentation is carried out on a prototype of 2 kW for single-phase resistive load, induction motor, and non-linear loads.

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“…The utility grid generally provides fixed frequency and voltage power to consumers. However, some industrial loads-for example, electric traction, induction heating, voltage regulation and controlled rectifier-require variable frequency power supply [1,2]. Therefore, AC/AC power electronic converters are used to convert the one frequency AC power to another frequency AC power [3].…”

Section: Introductionmentioning

confidence: 99%

A New Generalized Step-Down Single-Stage AC/AC Power Converter

et al. 2020

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Most traditional AC/AC power converters suffer from power quality problems and multi-stage power conversion losses. The rectifier and inverter-based AC/AC converter topology not only increases multi-stage power conversion losses, but also increases the volume, weight, and cost, and decreases the longevity of the converter due to the DC-link capacitor, line filter and electromagnetic interference (EMI) filter. High-frequency (about 10 kHz) switching advanced pulse width modulation techniques are generally used in order to compensate the power quality problems, which increase the switching losses and introduce the EMI problems. In this paper, a new generalized step-down single-stage line-frequency switching AC/AC power converter topology is proposed. The proposed converter uses line-frequency switching, and does not require any pulse width modulation techniques. The proposed topology offers promising performances in terms of lower order harmonics, total harmonic distortion, the elimination of DC-link capacitors and EMI filters, and switching losses. The circuit was designed and simulated in a MATLAB/Simulink environment. A scaled-down laboratory prototype of the proposed topology was developed in order to validate the feasibility. The experimental and simulation results reveal the feasibility of the proposed generalized step-down single-stage converter topology, and its excellent features.

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Bipolar Phase Shift Modulation Single-Stage Audio Amplifier Employing a Full Bridge Active Clamp for High Efficiency Low Distortion

Cited by 5 publications

References 19 publications

Audio Style Conversion Based on AutoML and Big Data Analysis

Audio Style Conversion Based on AutoML and Big Data Analysis

A Novel Fundamental Frequency Switching Operation for Conventional VSI to Enable Single-Stage High-Gain Boost Inversion with ANN Tuned QWS Controller

A New Generalized Step-Down Single-Stage AC/AC Power Converter

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