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Device and method for reducing capacitor temperature coefficient

A temperature coefficient and capacitor technology, which is applied to temperature compensation devices, fixed capacitor shells/packages, multiple fixed capacitors, etc., can solve the problems of large capacitance changes, inability to match randomly, and limited application scenarios of capacitor temperature coefficients.

Active Publication Date: 2021-04-09
XIAN XD POWER CAPACITOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, adjusting the temperature coefficient of capacitors through material selection and matching is limited by the application scenarios, and cannot be matched at will, and can only be processed and produced for a certain temperature range with a fixed temperature coefficient. The capacitance will still change in a working environment with a large temperature range. The case of excessive

Method used

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  • Device and method for reducing capacitor temperature coefficient
  • Device and method for reducing capacitor temperature coefficient
  • Device and method for reducing capacitor temperature coefficient

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Embodiment Construction

[0036] The present invention is described in further detail below:

[0037] see Figure 1-Figure 4 , the capacitor is composed of a capacitor upper cover 10, a capacitor shell 11 and a capacitor lower cover 12 to form a closed space 9, and the closed space 9 is filled with an insulating medium whose volume changes with temperature. When the temperature coefficient of the capacitor is positive, the core base 4 is installed on the capacitor On the lower cover 12, an expander 8 is installed in the core base 4. The expander 8 is circular, and a push plate 7 is placed in the hollow. There is an installation groove inside the push plate 7, where the support spring 6 can be placed and can push the support spring 6. Function, the support plate 5 is placed above the support spring 6; there is a slot structure below the support plate 5, which can clamp and fix the top of the support spring 6. The top of the support plate 5 is fixed and can be linked with the bottom of the capacitor cor...

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Abstract

The invention discloses a device and method for reducing the capacitor temperature coefficient, and the device comprises an enclosed space which consists of a capacitor upper cover, a capacitor housing and a capacitor lower cover, and the interior of the enclosed space is provided with a fixed cover, a capacitor core, a fixed plate, a core pedestal, a support plate, a support spring, a push plate, and an expander. According to the invention, the polar plate spacing of each capacitor element in the capacitor core is compressed or amplified by changing the height (namely the core compaction coefficient) of the capacitor core, so that the adjustment of the capacitance of the core is realized, and the temperature coefficient of the capacitor is automatically reduced.

Description

technical field [0001] The invention relates to the field of capacitance adjustment of power capacitors, in particular to a device and method for reducing the temperature coefficient of a capacitor. Background technique [0002] Power capacitors are the main equipment in the power system, mainly used in voltage measurement, reactive power compensation, filtering, carrier communication, etc. Because the capacitance changes with the temperature, when the capacitance changes too much, it will cause the accuracy to be out of tolerance and the protection to malfunction. [0003] At present, the temperature coefficient of the capacitor is adjusted by selecting and matching different materials in the design of the capacitor, and there is no way to automatically reduce the temperature coefficient of the capacitor. However, adjusting the temperature coefficient of capacitors through material selection and matching is limited by the application scenarios, and cannot be matched at wil...

Claims

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Application Information

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IPC IPC(8): H01G4/258H01G4/38H01G4/224
CPCH01G4/258H01G4/38H01G4/224Y02E60/13
Inventor 赵含赵莹任春阳刘水平
Owner XIAN XD POWER CAPACITOR CO LTD
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