Permanent-magnetic traction motor dual-strength, zero-gas-gap, corona-resistance insulation-impregnating process

Abstract

This invention relates to a non-gear, low rotational speed, and high torque rare earth permanent magnetism synchronization tractive electrical machinery soak the craft, which has double intensity, zero air gap, beared the electronics corona insulation, it is also suitable for other special electrical machinery insulation dipping treatment. Its soaks craft is below: predry the electrical machinery stator ferrite core which has winding, removes the moisture of electrical machinery stator ferrite core which has winding; cool the predried electrical machinerystator ferrite core which has winding under the normal temperature; Hang the cooled electrical machinery stator ferrite core into vacuum soakage pot, vacuumize the vacuum soakage pot; vacuum soakage the electrical machinerystator ferrite core which has winding, bake reelingly the electrical machinery stator ferrite core; Take out the stator ferrite core, cool it under the normal temperature, go on the second time soaking paint and baking solidification; After the second time soaking paint and baking solidification, takes out it from the drying oven and cool it under normal temperature.

Description

Technical field [0001] The double-strength, zero-air-gap, and corona-resistant insulation impregnation process of the permanent magnet traction motor of the present invention relates to a gearless, low-speed, high-torque rare-earth permanent magnet synchronous traction motor with double-strength, zero air gap, and electrical resistance. The corona insulation dipping process is also suitable for the insulation dipping treatment of other special motors. Background technique [0002] At present, the impregnation processes often used in motors are roughly divided into: 1. Primary immersion-baking curing; 2. Secondary immersion-baking curing; 3. Drip immersion-stationary solidification; the above-mentioned impregnation processes are suitable for motors with common requirements. However, due to the inverse time curve of temperature and viscosity during baking and curing, the viscosity of the impregnating varnish becomes extremely thin and loses under high temperature conditions. Theref...

AI Technical Summary

Problems solved by technology

[0002] At present, the impregnation processes often used in motors are roughly divided into: 1. Primary immersion-baking curing; 2. Secondary immersion-baking curing; 3. Drip dipping-static solidification; the above impregnation processes are suitable for motors with general requirements. However, due to the inverse time curve relationship between temperature and viscosity during baking and curing, the viscosity of the dipping paint becomes extremely thin and lost under high temperature conditions, so the effect of insulation treatment is still not very good, and it is impossible to form a zero air gap, which is easy to generate charges. Build up, generate high frequency pulse breakdown

At the same time, the traction motor does not have a fan, so the heat dissipation of the motor mainly depends on conduction and radiation. Due to the existence of the air gap, the heat conduction effect becomes very poor, and the temperature rise of the motor is often above 100K. In this way, it is easy to cause irreversible demagnetization of the rare earth permanent magnet.

In addition, due to the poor effect of insulation treatment, the electric strength and insulation strength of the insulation system are greatly reduced. Therefore, the elevator adopts a gearless permanent magnet synchronous traction motor, which creates certain technical obstacles for it to enter the market.