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Performance and Countermeasures of Capacitor in High Temperature Environment

Fundamentals of 1. Capacitance A capacitor is an element that stores electrical charge and is usually composed of an insulating material between two conductive plates. When a voltage is applied across the capacitor, the capacitor will store charge and form a certain electric field force line. The main performance indicators of capacitors include capacitance, interpolar voltage, dielectric loss, and so on. 2. high temperature influence mechanism In the high temperature environment, the electrical properties of the capacitor will be greatly affected, mainly in the following aspects: 1. Change in capacitance: High temperature will increase the resistance of the capacitor conductor plate, which in turn will cause the capacitance of the capacitor to decrease. 2. Capacity drift: Under high temperature environment, the medium of the capacitor will undergo thermal expansion, which will cause the plate spacing and plate area to change, resulting in its capacity drift. 3. Temperature coefficient change: The electrical properties of the capacitor are not only affected by high temperature, but also affected by the temperature coefficient. At high temperatures, the temperature coefficient changes, causing the capacitor capacitance to drift. 3. response measures In order to reduce the influence of high temperature on the electrical properties of capacitors, the following measures can be taken: 1. Select the appropriate dielectric material: select the dielectric material with good stability at high temperature as the dielectric of the capacitor. 2. Control of high temperature environment: for capacitors in high temperature environment, cooling measures can be taken or ventilation can be increased to reduce the ambient temperature. 3. Take protective measures: such as limiting the maximum voltage, ensuring the board spacing, installing insurance, etc., to protect the performance of the capacitor from damage. Summary: In high temperature environment, the electrical performance of the capacitor is easily affected, resulting in the capacitance change of the capacitor, temperature drift and other problems. In order to ensure the normal use of the capacitor, we should choose the appropriate dielectric material, control the high temperature environment, take protective measures and other means.

Release time:

2024-06-19

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Release time

06-19

Fundamentals of 1. Capacitance
A capacitor is an element that stores electrical charge and is usually composed of an insulating material between two conductive plates. When a voltage is applied across the capacitor, the capacitor will store charge and form a certain electric field force line. The main performance indicators of capacitors include capacitance, interpolar voltage, dielectric loss, and so on.
2. high temperature influence mechanism
In the high temperature environment, the electrical properties of the capacitor will be greatly affected, mainly in the following aspects:
1. Change in capacitance: High temperature will increase the resistance of the capacitor conductor plate, which in turn will cause the capacitance of the capacitor to decrease.
2. Capacity drift: Under high temperature environment, the medium of the capacitor will undergo thermal expansion, which will cause the plate spacing and plate area to change, resulting in its capacity drift.
3. Temperature coefficient change: The electrical properties of the capacitor are not only affected by high temperature, but also affected by the temperature coefficient. At high temperatures, the temperature coefficient changes, causing the capacitor capacitance to drift.
3. response measures
In order to reduce the influence of high temperature on the electrical properties of capacitors, the following measures can be taken:
1. Select the appropriate dielectric material: select the dielectric material with good stability at high temperature as the dielectric of the capacitor.
2. Control of high temperature environment: for capacitors in high temperature environment, cooling measures can be taken or ventilation can be increased to reduce the ambient temperature.
3. Take protective measures: such as limiting the maximum voltage, ensuring the board spacing, installing insurance, etc., to protect the performance of the capacitor from damage.
Summary: In high temperature environment, the electrical performance of the capacitor is easily affected, resulting in the capacitance change of the capacitor, temperature drift and other problems. In order to ensure the normal use of the capacitor, we should choose the appropriate dielectric material, control the high temperature environment, take protective measures and other means.

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Influence of High Temperature on Capacitor and Fault Performance

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Influence of High Temperature on Capacitor and Fault Performance

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Fuzhou Basic Electronic Element Co., Ltd.

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Fuzhou Basic Electronic Element Co., Ltd.

Over the years, we have been committed to the production, research and development and sales of multilayer ceramic capacitors and EMI filter products. The products are widely used in aerospace, communication equipment, petroleum exploration, medical equipment, electric vehicles, high-end industrial and communication 5G markets.