Stator coil corona preventing structure of highland high-voltage asynchronous motor

Abstract

The invention discloses a stator coil corona preventing structure of a highland high-voltage asynchronous motor. The stator coil corona preventing structure comprises a coil body, a first mica tape wraps a straight section and a curved section of the coil body, the first mica tape arranged outside the straight section of the coil body is wrapped by a low-resistance tape through a half lap, a medium-resistance tape wraps the first mica tape arranged at the curved section of the coil body, the low-resistance tape and the medium-resistance tape are wrapped by a high-resistance tape through a half lap, a second mica tape wraps the high-resistance tape, and a one-way permeable protection tape wraps the second mica tape through a half lap. The stator coil corona preventing structure is reasonable in structure, corona bloom voltage of the high-voltage asynchronous motor in the plateau climate in a highland more than 1000 meters in height is ensured, and the stator coil corona preventing structure is simple to operate, high in reliability and capable of safely running for a long time.

Description

technical field [0001] The invention relates to the technical field of high-voltage asynchronous motors, in particular to a stator coil anti-corona structure for high-voltage asynchronous motors used on plateaus above 1,000 meters above sea level. Background technique [0002] At present, the market demand for asynchronous motors used on plateaus above 1,000 meters is large, and the economic benefits are good. However, due to the location on the plateau, the corona inception voltage of the coil is also low, and the corona is most likely to occur at the notch and the end of the winding for high-voltage motors. At leads, air gaps in insulation, etc. When the corona occurs, the decomposed nitrogen oxide and other gases of the ozone machine and water vapor will act together to chemically corrode the insulation of the coil. When the current passes through, it will generate local overheating, accelerate the oxidation of the place, and cause damage to the motor. Power failure ...

AI Technical Summary

Problems solved by technology

[0002] At present, the market demand for asynchronous motors used on plateaus above 1,000 meters is large, and the economic benefits are good. However, due to the location on the plateau, the corona inception voltage of the coil is also low, and the corona is most likely to occur at the notch and the end of the winding for high-voltage motors. At leads, air gaps in insulation, etc.

When the corona occurs, the decomposed nitrogen oxide and other gases of the ozone machine and water vapor will act together to chemically corrode the insulation of the coil. When the current passes through, it will generate local overheating, accelerate the oxidation of the place, and cause damage to the motor. Power failure cannot operate safely, and even cause serious accidents of winding burnt

[0003] The main reason for the low corona inception voltage of the winding is that the anti-corona structure is unreasonable, the electromagnetic field is unevenly distributed, and the voltage gradient at the end of the coil is large, so certain measures need to be taken to change the existing anti-corona structure

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