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A device and method for reducing the temperature coefficient of a capacitor

A temperature coefficient and capacitor technology, which is applied in 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. To achieve the effect of reducing the temperature coefficient

Active Publication Date: 2022-05-17
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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  • A device and method for reducing the temperature coefficient of a capacitor
  • A device and method for reducing the temperature coefficient of a capacitor
  • A device and method for reducing the temperature coefficient of a capacitor

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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 temperature coefficient of a capacitor, which comprises a closed space composed of a capacitor upper cover, a capacitor shell and a capacitor lower cover, and the closed space is provided with a fixed cover, a capacitor core, a fixed plate, a core base, a support Plate, support spring, push plate and expander. The invention compresses or enlarges the pole plate spacing of each capacitive element inside the capacitor by changing the height dimension of the capacitor core (that is, the core compression coefficient), thereby realizing the adjustment of the core capacitance, and then automatically reducing the temperature coefficient of the capacitor.

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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Patent Type & Authority Patents(China)
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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