An underground high temperature medium and high frequency transformer and its parameter acquisition method

Abstract

The invention discloses a medium-high-frequency transformer capable of being used in a high-temperature downhole environment and a parameter acquisition method therefor The medium-high-frequency transformer comprises magnetic core units, primary side windings, secondary side windings and a fixed frame, wherein the magnetic cores consist of multiple annular nanocrystalline magnetic cores with high high-temperature characteristics; the windings are uniformly wound around each annular magnetic core; the primary side windings are arranged on the inner layer while the secondary side windings are arranged on the outer layer; the numbers of turns of the primary side windings and the secondary side windings on each annular magnetic core are the same; the primary side windings and the secondary side windings on adjacent two magnetic cores are connected in series; all the magnetic cores and the windings are coaxially and longitudinally arranged, and are fixed on the fixed frame; a certain distance is reserved between adjacent two magnetic cores for radiating; the whole transformer is encapsulated by high-temperature epoxy resin; and the primary side windings are led out through primary side terminals while the secondary side windings are led out through secondary side terminals. The transformer is flexible in size, and can be used reliably in the high-temperature downhole environment.

Description

technical field [0001] The invention relates to a transformer, in particular to a medium-high frequency transformer capable of operating in an underground high-temperature environment and a parameter acquisition method thereof. Background technique [0002] The medium and high frequency transformer is an important part in the switching power supply circuit, which can realize the functions of electrical isolation and voltage conversion. However, in some special occasions, such as the application of pulse power in oil well plugging, mine geophysical prospecting and underwater target detection, the transformer is required to be small in size, large in magnetizing inductance, and can work reliably in the underground high temperature environment of about 100 °C. . The existing design schemes of medium and high frequency transformers are basically based on room temperature conditions, and heat dissipation measures such as water cooling and air cooling are adopted at slightly high...

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Problems solved by technology

[0003] Aiming at the shortcomings of the prior art, the purpose of the present invention is to provide a medium-high frequency transformer that can operate in a high-temperature environment underground, aiming to solve the problem that the existing transformer is large in size and difficult to work normally in a high-temperature environment underground

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