Ceramic Circuit Boards: The Ultimate Choice for Photovoltaic Inverters
- Iva Leung
- Jan 15, 2024
- 2 min read
Photovoltaic (PV) power generation systems consist of key components such as inverters, controllers, PV arrays, and energy storage devices. The inverter, also known as an invert power source, plays a crucial role by converting direct current (DC) energy into alternating current (AC) to meet the needs of AC loads, power equipment, and grid-connected power generation.
Inverters come in various types based on output frequency, phase number, power flow direction, main circuit structure, and output waveform. They are crucial for efficient energy conversion in photovoltaic systems.
Requirements for Photovoltaic Inverters:
Stable Output Voltage:
The inverter must provide a stable output voltage, with fluctuations limited to around 5%. Rapid load changes should result in voltage fluctuations within a 10% range.
Low Waveform Distortion:
A maximum waveform distortion of 5% is generally accepted. Excessive distortion can lead to additional losses in rational loads and cause severe heating in load components, impacting equipment lifespan and system efficiency.
Stable Output Frequency:
The optimal operating frequency for motors is 50Hz. Deviations from this frequency, either too high or too low, can result in increased heating and reduced system efficiency. Maintaining stability in the output frequency enhances the cost-effectiveness of photovoltaic systems.
Additional Output Current:
Also known as additional output capacity, this refers to the extra output current of the inverter within the specified load power factor range. The additional output current is crucial for maintaining system stability and reliability.
Other Considerations:
Protection against lightning and over-temperature.
Reliable start-up under additional loads.
Ceramic Circuit Boards as the Preferred Choice:
Ceramic circuit boards offer superior insulation and stability, with a breakdown voltage of up to 20KV/mm. They can withstand sudden changes in current and voltage, ensuring the normal operation of equipment and systems. The thermal expansion coefficient of ceramics closely matches that of chips, preventing significant deformation and issues such as solder joint detachment and internal stress during rapid temperature changes.
Ceramic circuit boards exhibit higher thermal conductivity and excellent heat dissipation, enabling them to operate effectively in challenging outdoor environments with extreme temperatures. This enhances the overall lifespan of photovoltaic systems.
Conclusion:
As a major exporter of photovoltaic products, China is witnessing a shift towards using ceramic circuit boards in inverters and solar panels due to increased environmental requirements and product upgrades. The use of inorganic materials, pollution-free properties, efficient heat dissipation, and high stability make ceramic circuit boards an integral component in the advancement of photovoltaic technology. The unique properties of ceramic boards contribute to the longevity and reliability of photovoltaic inverters, ensuring sustainable and efficient energy conversion.
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