Abstract: This paper presents a novel soft-switching Boost converter. Traditional Boost converters produce switching losses during turn-on and turn-off, which decreases the overall system efficiency. The new Boost converter employs a soft-switching method by adding an auxiliary switching transistor and a resonant circuit. Consequently, compared to hard-switching, this converter significantly reduces switching losses. It can be applied in various devices, including photovoltaic systems and power factor correction. A detailed analysis of the circuit's working principle and the conditions required for soft switching is provided. The Pspice 9.2 software was used for simulation verification. The simulation results demonstrate that all switching devices in the converter achieve soft switching, improving efficiency. Key words: Boost circuit; Soft switching; Resonant circuit; Power factor correction 0 Introduction: In recent years, as switching frequencies have increased, switching power supplies have become smaller and more lightweight. However, higher switching frequencies result in greater switching losses, thereby increasing the overall system loss. Many converters utilize resonance to decrease switching losses. However, the addition of an auxiliary resonant circuit increases circuit complexity and costs. In some resonant converters with auxiliary switches, only the main switching tube achieves soft switching while the auxiliary switching tube continues to operate in a hard-switching state. Due to the presence of auxiliary switch tube switching losses, these converters fail to enhance the overall system efficiency. The traditional Boost converter has been widely adopted in boosting applications due to its simplicity and ease of implementation. In photovoltaic power generation systems, the relatively low output voltage of photovoltaic array cells requires significant boosting to meet the demands of subsequent inverters. To improve the conversion capability, adjustable range, and efficiency of the converter, the conventional Boost converter has been enhanced. This paper proposes a new soft-switching Boost converter. By incorporating the circuit structure of the auxiliary switching tube and the resonant circuit, both the main and auxiliary switching tubes achieve soft switching. Compared to other soft-switching converters, this design reduces switching losses at the same frequency and improves overall system efficiency. This paper analyzes the working principle of this converter in detail and simulates it using PSpice to verify the conditions for achieving soft switching. 1 Low Loss Soft Switch Boost Converter 1.1 Circuit Topology: The low-loss soft-switching Boost converter is illustrated in Figure 1. This innovative Boost converter incorporates an auxiliary switching transistor and a resonant circuit, which allows for soft switching across all devices. This approach eliminates the high switching losses associated with conventional hard-switching designs, making it ideal for modern power electronics applications. The addition of these components ensures that the converter operates efficiently even at high frequencies, reducing heat generation and extending component lifespan. Furthermore, the circuit's compact design makes it suitable for integration into a wide range of electronic systems, from renewable energy solutions to industrial automation equipment. As the demand for more efficient and reliable power conversion continues to grow, this soft-switching Boost converter represents a significant advancement in the field of power electronics. Ei28 Transformer,15V Smd Transformer,28 Volt Transformer,28V Transformer,variac transformer Guang Er Zhong(Zhaoqing)Electronics Co., Ltd , https://www.geztransformer.com
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Low-loss soft-switching Boost converter - Power Circuit - Circuit Diagram
The EI 28 Transformer is a specific type of transformer featuring an EI-laminated core structure, commonly used across various industries including power, electronics, instrumentation, lighting, and audio.
Basic Information
Model: EI 28
Type: Single-phase transformer with an EI-type iron core
Cooling Method: Dry-type transformer
Winding Configuration: Multi-winding transformer
Certifications: May include international standard certifications such as ISO 9001
Product Features
High Efficiency: The EI 28 Transformer is often designed for high efficiency, thanks to optimized designs and materials used. Some manufacturers employ cold-rolled grain-oriented silicon steel strips for the core, which reduces losses and enhances efficiency.
Low Losses: Compared to traditional transformers, the EI 28 Transformer exhibits lower losses, contributing to energy savings and reduced operating costs.
Low Temperature Rise: During operation, the transformer experiences a low temperature rise, extending its lifespan and improving system stability.
Customization: Many manufacturers offer customization options for the EI 28 Transformer, allowing clients to specify different power ratings, sizes, and appearances based on their unique requirements.