Electromagnetic Force Generation Method for Pulse Voltage Accelerated Aging Experiment of Electrical Insulation Film
A technology of electromagnetic force and pulse voltage, which is applied in the directions of measuring electricity, measuring electric variables, and testing dielectric strength, etc., which can solve the problems that the insulation life model does not consider the electromagnetic force and the influence of insulation aging speed
Active Publication Date: 2019-06-04
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
The currently used pulse electrical stress insulating film accelerated aging test device only includes three stress factors of pulse voltage amplitude, frequency, and temperature, and is mainly used to study the influence of pulse voltage amplitude, pulse frequency, and temperature stress factors on insulation life. The influence of mechanical stress generated by electromagnetic mechanical force on the aging speed of insulation has not been considered, and the insulation life model based on these studies has not considered the influence of electromagnetic force
Method used
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Embodiment
[0015] 1. Establish an experimental device, including a high-voltage pulse power supply 1, a flexible high-voltage line 2, an upper electrode 3, a lower electrode 5 and an excitation power supply 7.
[0016] 2. The upper electrode 3 is a cylinder made of soft magnetic conductor material, with an outer diameter of 25mm and a height of 25mm. An M4 threaded hole is set at the position marked A on the upper part of the upper electrode 3 to connect to the P of the high-voltage pulse power supply 1. U At the output end, the lower plane of the upper electrode 3 is chamfered and ground to serve as the conductive contact surface of the insulating film sample 4 .
[0017] 3. The lower electrode 5 is composed of a soft magnetic conductor material divided into N-S poles and an embedded excitation coil 6. The magnetic pole width of the upper plane divided into N-S poles is 3-6mm, and the N-S poles are separated by brass with a width of about 2.5mm. as attached image 3 shown. The upper p...
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The invention discloses a method for generating electromagnetic force in an electric insulation film pulse voltage accelerated aging experiment. An experimental device is established, including a high-voltage pulse power supply, a flexible high-voltage line, an upper electrode, a lower electrode and an excitation power supply; the pattern of an electrical insulating film is placed between the conductive planes of the upper and lower electrodes. The excitation power supply applies a pulse excitation current to the excitation coil of the lower electrode to generate an electromagnetic mechanical force on the pattern of the electrical insulation film in the middle of the electrode. The magnitude and period of the electromagnetic force are controlled by controlling the amplitude and period of the pulse excitation current. Apply electrical stress between the upper electrode and the lower electrode, and place the upper electrode, the lower electrode and the electrical insulating film sample in a temperature-controllable uniform temperature field to generate the required thermal stress. In addition to the electric stress and temperature stress, the present invention adds the stress factor of electromagnetic force, which can more completely reflect the stress environment of the insulation in the operation of electrical equipment, and more accurately study the aging law of the insulation under the pulse electric stress environment.
Description
technical field [0001] The invention relates to a method for generating electromagnetic force in an electrical insulation film pulse electric stress insulation accelerated aging life test. Background technique [0002] Electrical insulation film is an important electrical basic material, its performance and electrical life directly affect the life and operation safety of electrical equipment. The life of electrical insulating films is mainly affected by electrical stress, thermal stress, and electromagnetic mechanical force. In order to quickly obtain the electrical life information of the electrical insulation film, it is necessary to simulate the stress environment of the electrical insulation film during the operation of electrical equipment, and accelerate the electrical insulation film by appropriately increasing the stress value of the electrical insulation film without changing the insulation failure mechanism. The aging process of the electrical insulation film is c...
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IPC IPC(8): G01R31/12
CPCG01R31/1263
Inventor 蒋存波孔祥丽金红杨家志陈小琴
Owner GUILIN UNIVERSITY OF TECHNOLOGY