Insulation treatment of explosion-proof permanent magnet motor

We have introduced the maintenance and upkeep of explosion-proof permanent magnet motors before. It can be seen that this motor requires regular maintenance and upkeep to extend its life. So how should we deal with the insulation of explosion-proof permanent magnet motors? Next, please read the detailed introduction below, I hope it will be helpful to everyone!

The insulation of explosion-proof permanent magnet motors is composed of insulating paint that is dipped into the windings between strands, turns, layers, opposite directions, ground and embedded wires. When the power is larger and a single wire is still used, the electrical density must be high, and the number of wires must be increased, that is, multi-strand winding is used to increase the cross-sectional area of ​​the wire to reduce the electrical density. For example, YB series 90kw and 8-pole motors use five φ1.4 enameled wires wound in parallel.

The number of turns is obtained from the center of intersection scale and the allowable range of magnetic density. In addition to the five insulation points listed above, there is also the insulation of the winding ends and wires, as well as the inter-row insulation when "double-row string" winding is selected for high-voltage low-power motors.

The purpose of insulation treatment for explosion-proof permanent magnet motors is as follows:

(1) Improved the moisture resistance of motor insulation;

(2) Improved heat resistance of motor insulation;

(3) Improved thermal conductivity of the motor;

(4) Improved the electrical and mechanical functions of motor insulation;

(5) Improved chemical corrosion resistance.

The insulation treatment methods for explosion-proof permanent magnet motors are as follows:

First of all, the DMD insulation paper currently used in the stator slot or higher-grade insulation paper is used according to the motor insulation grade requirements. At present, the "green shell paper" has been eliminated.

Secondly, after the embedded wiring or binding wiring is completed, it can be impregnated with insulating paint and heated and dried. There are different methods of dipping paint, including general application of insulating paint, drip dipping insulating paint, vacuum dipping paint, and vacuum pressure dipping paint. The corresponding insulating paint and dipping process are selected according to the motor insulation level.

The ordinary repair department is to pour paint and then dry it overhead using an electric stove or light bulb.