Rapid positioning method for breakover point of insulation resistance of bifilar parallel wound coil

Abstract

The invention belongs to a positioning technology for a breakover point of insulation resistance of a coil, and relates to a rapid positioning method for a breakover point of the insulation resistance of a bifilar parallel wound coil. Heads of two groups of enamelled wires are respectively connected to an anode and a cathode of a tramegger and are subjected to continuous insulation test, the tail parts of the two groups of enamelled wires are held at the same time to slowly withdraw the coil, at the initial stage of coil withdrawing, the insulation resistance is 0; along with the withdrawing of the coil, the two groups of enamelled wires are separated to cause breakover point disconnection, and the insulation resistance rises to infinite, so that the breakover point of the insulation resistance is locked within a smaller range; and then the anode of the tramegger is connected to the end part of one group of enamelled wire of the coil, the cathode of the tramegger is slid in a contact mode slowly and circularly on the locked enameled wire to and fro, and meanwhile the tramegger continuously carries out insulation test, and once the cathode of the tramegger is contacted with the breakover point of the insulation resistance, an indicator of the tramegger swings to zero immediately so as to precisely lock the breakover point. The positioning method disclosed by the invention is simple in operation and high in precision and has greater practical application value.

Description

technical field [0001] The invention belongs to the coil insulation resistance conduction point positioning technology, and relates to a double-wire winding coil insulation resistance conduction point rapid positioning method. Background technique [0002] For instruments such as speed sensors, vibration sensors, and transformers, the core part of the induction test is the coil. Since the double-wire parallel-wound coil can simultaneously output two sets of test signals and transmit them to different controllers, it is widely used in the field of instrumentation. The double-wire winding coil means that two sets of enameled wires are wound on the same skeleton at the same time, and finally four wires are drawn out to connect to the connector. [0003] However, insulation resistance conduction often occurs during the test, resulting in a short circuit between the two sets of coils. Through investigation and analysis, it can be concluded that the two sets of enameled wires of...

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Problems solved by technology

[0003] However, insulation resistance conduction often occurs during the test, resulting in a short circuit between the two sets of coils

Through investigation and analysis, it can be concluded that there is conduction between the two sets of enameled wires of the coil, but the conduction point cannot be accurately located.

Because the diameter of the enameled wire is only 0.07mm, and the number of turns of the coil usually reaches thousands of turns, finding a micron-level conduction point on an enameled wire of several meters or even tens of meters is tantamount to finding a needle in a haystack. In the face of several questions such as the number of conduction points, the coil had to be removed and rewound, which brought hidden dangers to future production efficiency and product reliability.

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