High-voltage coil

摘要

The present invention provides a high-voltage coil superior in insulating properties and rigidity at high temperatures, which comprises a bobbin, a conducting wire wound around the bobbin, and an encapsulant encapsulating the conducting wire, wherein the encapsulant comprises a liquid crystalline polyester having a repeating unit represented by defined formula (1), —O—Ar1—CO—, a repeating unit represented by defined formula (2), —CO—Ar2—CO—, and a repeating unit represented by defined formula (3), —X—Ar3—Y—, as a forming material.

主权项

1. A high-voltage coil comprising a bobbin, a conducting wire wound around a winding part of the bobbin, and an encapsulant encapsulating the conducting wire, wherein the encapsulant comprises a liquid crystalline polyester having a repeating unit represented by the following formula (1), a repeating unit represented by the following formula (2), and a repeating unit represented by the following formula (3) as a forming material, and the content of repeating units having a m-phenylene group in the liquid crystalline polyester is 1 mol % to 6.5 mol % based on the total amount of all repeating units:
—O—Ar1—CO—  (1) —CO—Ar2—CO—  (2) —X—Ar3—Y—  (3) —Ar4—Z—Ar5—  (4)wherein Ar1 represents a phenylene group, a naphthylene group, or a biphenylylene group; Ar2 and Ar3 each independently represent a phenylene group, a naphthylene group, a biphenylylene group, or a group represented by formula (4) provided above; X and Y each independently represent an oxygen atom or an imino group (—NH—); the hydrogen atoms existing in the group represented Ar1, Ar2, or Ar3 may each independently have been substituted with a halogen atom, an alkyl group having 1 to 10 carbon atoms, or an aryl group having 6 to 20 carbon atoms; Ar4 and Ar5 each independently represent a phenylene group or a naphthylene group; and Z represents an oxygen atom, a sulfur atom, a carbonyl group, a sulfonyl group, or an alkylidene group.