1) 3 times inspection from material to goods,to low down the defective rate to the minimum,including IV
test ,EL test.
2) All of our solar panel product haves passed the ISO14001,ISO9001,ISO18001,CE,TUV approve.
3) We csn provide solar panel from 5w to 360w,giving you customized service.
4) Sunket using advanced automatic equipment to control product quality.
Product Description
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Solar Panel product's Main Features
Basic understanding and development direction of switching power supply
Switching power supplies are a type of power supply that utilize modern power electronics to control the on and off time ratio of a switch, ensuring a stable output voltage. These power supplies typically consist of a pulse width modulation (PWM) control IC and a MOSFET. Compared to linear power supplies, switching power supplies tend to increase in cost as output power rises, but the rate of this increase varies.
At a certain output power level, the cost of a linear power supply becomes higher than that of a switching power supply, known as the cost reversal point. With continuous advancements in power electronics, the cost reversal point has been shifting toward lower output power levels, offering greater potential for the development of switching power supplies.
High-frequency operation is a key direction for the evolution of switching power supplies. This high frequency enables miniaturization, allowing them to be used in a wider range of applications, especially in high-tech fields, which contributes to the compactness and lightness of high-tech products. Additionally, the development and use of switching power supplies play a significant role in energy conservation, resource saving, and environmental protection.
The main power electronic components used in switching power supplies include diodes, IGBTs, and MOSFETs. SCRs have limited applications in input rectifier circuits and soft start circuits. GTRs are difficult to drive and operate at low frequencies, making them increasingly obsolete in favor of IGBTs and MOSFETs.
There are three essential conditions for a switching power supply:
1. Switching: Power electronic devices operate in a switching state rather than a linear one.
2. High frequency: The devices work at high frequencies instead of near the line frequency.
3. DC output: The output is direct current (DC), not alternating current (AC).
Switching power supplies can be broadly categorized into two types: AC/DC and DC/DC. While DC/DC converters have become highly modularized with mature design and production processes, AC/DC modules face more complex challenges during modularization due to their inherent characteristics.
In terms of DC/DC conversion, there are various circuit topologies such as buck, boost, buck-boost, and Cuk circuits. Non-isolated configurations include these, while isolated ones consist of forward, flyback, half-bridge, full-bridge, and push-pull circuits. Soft-switching technology has significantly improved DC/DC performance, enabling higher efficiency and power density.
For AC/DC conversion, the process involves converting AC to DC, and it allows bidirectional power flow. Rectification refers to power flowing from the source to the load, while active inverter refers to the reverse. Due to the need for filtering and compliance with safety and electromagnetic compatibility (EMC) standards, AC/DC power supplies are generally larger and more complex.
When selecting a switching power supply, factors like output current, grounding, and protection circuits must be considered. Output current should be calculated using a safety margin factor, and proper grounding and shielding measures help reduce interference. Protection features such as overcurrent, overheat, and short-circuit protection are essential to ensure safe operation.
The future of switching power supply technology lies in high frequency, high reliability, low power consumption, low noise, and modularity. Innovations in components, materials, and surface mount technology (SMT) continue to drive miniaturization and efficiency improvements. Soft-switching techniques like ZVS and ZCS are becoming standard, enhancing efficiency and reliability.
Modular designs enable flexible system configurations, including N+1 redundancy and parallel expansion. Despite progress, challenges remain in reducing noise and improving resonant conversion technology. Ongoing research and innovation will further expand the potential of switching power supplies in various industries.