scispace - formally typeset
Search or ask a question

Answers from top 10 papers

More filters
Papers (10)Insight
This new inverter is suitable for multilevel power inversion with low dc-bus voltage.
The proposed inverter can not only provide output voltage that is higher or lower than DC input voltage but can also use the pulse-width modulation (PWM) control technique.
Hybrid inverter employing such circuits provides a technically superior and economically competitive alternative for operating HVDC into weak AC systems.
Such an inverter should be light weight, low cost, efficient, and provide galvanic isolation between the source and the AC output/grid connection.
Proceedings ArticleDOI
08 Jun 2016
9 Citations
Thus, the novel inverter is intended to be used in applications whenever an ac voltage larger than the dc link voltage is needed, as UPS or even renewable energy supplies.
Thus, the proposed inverter is suitable for applications with low voltage sources such as batteries, fuel cells, or solar cells.
The inverter is proposed to be an advantageous choice in low-voltage stand-alone photovoltaic applications.
The difficulties of operating HVDC system into weak AC system can be overcome by using the hybrid inverter.
Proceedings ArticleDOI
Ebrahim Babaei, Farzad Sedaghati 
15 Nov 2011
23 Citations
The proposed inverter with these advantages may be useful in the low-voltage applications such as photovoltaic and fuel cell.
The proposed inverter is found attractive in low-power applications.

See what other people are reading

What is the current state of ADC compensation research and what are the main unsolved problems?
4 answers
Current research in ADC compensation focuses on innovative techniques to address inherent challenges like capacitor mismatch and analog signal path errors. Techniques like Dynamic Element Matching (DEM)and backpropagation-based compensationhave shown promising results in improving ADC performance. However, challenges persist, such as the need for adaptive background compensation to mitigate errors caused by process variations in CMOS implementations, the impact of time-interleaved ADC (TI-ADC) mismatches on receiver performance, and the nonlinear distortion induced by TI-ADC structures in full-duplex transceivers. Unsolved problems include achieving high manufacturing yield in the presence of process variations, maintaining robustness and convergence speed in compensation techniques, and effectively mitigating ADC imperfections to ensure optimal system performance.
What are the remaining unsolved problems of delta-sigma modulator?
5 answers
The remaining unsolved problems of delta-sigma modulators include issues such as limited noise attenuation in first-order modulators due to low modulator order and 2-level quantizer resolution, noise folding effects at low frequencies in closed-loop continuous time delta-sigma modulation structures, and the need for improved circuit scale reduction and spurious reduction without altering the transfer function in delta-sigma modulators. These challenges highlight the ongoing research efforts to enhance the stability, noise attenuation, dynamic range, and overall performance of delta-sigma modulators in various applications, including power converters and operational amplifiers, to address issues related to process, supply voltage, and temperature variations.
Why does the resonant frequency change in an inverter with an LCL filter installed?
5 answers
The resonant frequency in an inverter with an LCL filter can change due to various factors. The LCL filter, although advantageous for better attenuation of inverter switching harmonics, is susceptible to resonance with the grid, potentially causing stability issues in the power system. Grid impedance variations can lead to the drift of the resonant frequency, further impacting system robustness and control performance. To address this, adaptive extremum seeking control (AESC) and extremum seeking control-based resonant frequency estimation schemes have been proposed to estimate and track the resonant frequency online, ensuring system stability and performance. These methods offer low computational complexity, enabling effective resonant frequency estimation without burdening the normal inverter controller operation.
What is starter cell in this publication?
4 answers
In the publications provided, a starter cell is described in different contexts. In one instance, a starter cell is designed for plant growth, featuring openings for seeding and root passage, along with strategically placed ridges to guide root development and prevent twisting. Another mention of a starter cell refers to its role in a circuit, where it is part of a system that couples and decouples a power supply input to a supply capacitor based on the switching status of the circuit. Additionally, a different publication discusses a starter cell used in a fuel cell system, where part of the fuel is converted into hydrogen gas to enhance starting performance, especially at low temperatures. These varied applications highlight the diverse functionalities of starter cells in different fields.
How to caluclate the natural frequency of an RLC series circuit?
4 answers
To calculate the natural frequency of an RLC series circuit, various factors need to be considered. The natural frequency increases with plate distance but decreases with plate area and linear inductance coefficient. Additionally, the resonance and anti-resonance frequencies can be accurately determined by analyzing the impedance values of the circuit, even in the presence of damping effects. The circuit's components, such as resistance, inductance, and capacitance, play crucial roles in determining the natural frequency. Moreover, the medium inside the capacitor, dielectric constant, and special radiation generated due to charge imbalances impact the spectral form of the radiation, influencing the overall behavior of the circuit.
How does the piezoelectric coefficient of BCZT compare to that of PVDF under different loading conditions?
5 answers
The piezoelectric coefficient of BCZT ceramic varies based on the loading conditions. BCZT ceramic exhibits a piezoelectric coefficient of approximately 577 pC/N. On the other hand, PVDF, when incorporated into piezoelectric composites, shows a piezoelectric charge coefficient (d33) of around 26-27 pC/N and a piezoelectric voltage coefficient (g33) of 16.0 × 10−3 V·m/N when combined with BZT ceramic. Furthermore, the addition of BCZT nanowires into a PVDF-TrFE matrix enhances the piezoelectric properties, with a composite containing 15 wt % BCZT nanowires achieving a high energy harvesting figure of merit of 5.3 × 10–12 m2/N. These findings highlight the superior piezoelectric performance of BCZT ceramic compared to PVDF under different loading conditions, emphasizing the potential for BCZT-based composites in energy harvesting and sensor applications.
Is voltage stabilizer required for dishwasher?
5 answers
Yes, a voltage stabilizer is beneficial for a dishwasher to ensure safe and efficient operation. Voltage fluctuations, common in electrical supply systems like those in Myanmar, can lead to malfunctions and damage in appliances, including dishwashers. Automatic voltage stabilizers, equipped with control circuits and sensing units, help maintain a constant output voltage within the required range, protecting the dishwasher from potential harm caused by voltage variations. These stabilizers use electronic circuits and sometimes servo-controlled motors to regulate the voltage supplied to the appliance, ensuring it operates within the optimal voltage range of around 220VAC. By utilizing such stabilizers, the dishwasher can function reliably and efficiently, extending its lifespan and preventing damage due to inconsistent voltage levels.
What is the definition of load shedding?
4 answers
Load shedding is a strategic method of intentionally cutting off electrical power during periods of high demand or system instability to prevent widespread blackouts or voltage collapse. It involves prioritizing and selectively disconnecting loads to maintain system stability. Various techniques have been proposed to optimize load shedding, such as under voltage load shedding (UVLS) methods that consider load importance and location for efficient curtailment. In the context of real-time data processing in IoT applications, load shedding techniques are crucial to balance data variability and priority, ensuring important data retention based on project definitions and data variations. Load shedding systems can also enhance fault tolerance and resilience in message communications by dynamically managing data requests based on configurable criteria and status information.
How to select case studies in architecture ?
5 answers
To select case studies in architecture, various methodologies can be employed. One approach involves qualitative analysis, focusing on metrics of building performance and conducting structured interviews with architects, engineers, and facilities managers to understand design intent, team dynamics, and building delivery processes. Another method utilizes a convolutional neural network for case preselection, followed by graph and subgraph matching to retrieve architectural designs, supporting higher architectural education with digital assistance tools. Additionally, a systematic literature review can help identify significant design choices and their rationale, satisfying stakeholder concerns related to design decision management. By combining these approaches, architects can effectively choose case studies that provide valuable insights into design processes, performance outcomes, and decision-making dynamics in architecture.
What is current technology in battery and supercapacitor charging for EV system?
5 answers
The current technology in battery and supercapacitor charging for Electric Vehicle (EV) systems involves innovative approaches to enhance charging efficiency and longevity. One method includes integrating supercapacitors into EVs to facilitate rapid charging. Another approach focuses on utilizing supercapacitors from EVs in hybrid energy storage systems to improve the lifetime of central battery storage systems in microgrids. These strategies aim to optimize charging profiles, increase energy storage system efficiency, and enhance voltage quality in EV systems. Supercapacitors, also known as ultracapacitors, offer quick charge and discharge cycles without compromising long-term performance, making them ideal for improving the overall effectiveness of battery-supercapacitor hybrid systems in EV charging.
Does easy interconnection make easy power purchase agreements?
5 answers
Easy interconnection does not necessarily equate to easy power purchase agreements. Interconnection agreements play a crucial role in ensuring reliability, reducing network losses, and managing energy supply without increasing generation capacity. While interconnection can facilitate power purchase, various factors influence the ease of agreements, such as network structures, efficient network formation, stable network conditions, and the presence of disparities between them. Additionally, incorporating technologies like superconducting magnetic energy storage (SMES) into interconnections can enhance system operations and reliability but require careful design considerations and optimization. Therefore, while interconnection can facilitate power purchase, the specifics of the agreements, network conditions, and technological integrations play significant roles in determining the ease of power purchase agreements.