The reliability and service life of the motor largely depend on the winding, and the winding is composed of enamelled wire, so the performance of the insulating material is very important. Senli Motor is focused3KWAnd the following small power motor production of motor manufacturers, we produce torque motor, brake motor and other products are used180°Grade high temperature resistant all copper enamelled wire, more reliable operation.
The performance of insulating materials mainly depends on electrical properties, heat resistance and mechanical properties. Taking electrical performance as an example, mainly including breakdown strength, insulation resistivity, etc., breakdown of insulation materials can be roughly divided into electrical breakdown, thermal breakdown, discharge breakdown.
1.Electric breakdown
Under the action of a strong electric field, the charged particles inside the insulation move violently, collide and dissociate, destroy the molecular structure, and finally break down, which is called electrical breakdown.Torque motor manufacturersReminder: The electrical breakdown voltage increases linearly with the thickness of the material, in a uniform electric field, unless the impulse voltage time is shorter than10Second, electrical breakdown strength is generally independent of voltage action time.
2.Thermal breakdown
Under the action of alternating electric field, the heat generated inside the insulating material due to the loss of the medium, if it cannot be dispersed in time, the internal temperature of the material will rise, resulting in the destruction of the molecular structure and breakdown, known as thermal breakdown. Torque motor manufacturers remind: the thermal breakdown voltage decreases with the increase of the temperature of the surrounding medium, the material thickness increases, the heat dissipation conditions deteriorate, and the breakdown strength decreases; When the frequency increases, the dielectric loss increases and the breakdown strength decreases.
3.Discharge breakdown
Under the action of strong electric field, the bubbles contained in the insulating material will discharge due to ionization. Impurities are also vaporized by electric field heating, producing bubbles, so that the bubble discharge is further developed, resulting in the breakdown of the entire material, known as discharge breakdown.
The breakdown of insulation materials, under normal circumstances, is the existence of the above three simultaneously, it is difficult to separate. Insulating materials can be impregnated with insulating paint or glue.Mori machineThe use of vacuum dipping technology can not only improve the electric field distribution to increase the breakdown strength, but also improve the heat dissipation conditions to increase the thermal breakdown strength.
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