Insulation materials are materials that are non-conductive under allowable voltage, but not absolutely non-conductive. Under a certain external electric field strength, they can also undergo processes such as conductivity, polarization, loss, breakdown, and aging after long-term use.
Its resistivity is very high, usually in the range of 10 to 10 to the 22nd power Ω · m. In a motor, the insulation material around the conductor isolates the turns and the grounded stator core to ensure the safe operation of the motor.
Insulating materials, also known as dielectrics, refer to substances that are non-conductive or have very little conductivity under the action of DC voltage, with a resistivity generally greater than 1010 Ω· m. The main function of insulation materials is to isolate charged conductors with different potentials in electrical equipment, allowing current to flow along a certain path. They can also serve as mechanical support and fixation, as well as arc extinguishing, heat dissipation, energy storage, moisture-proof, mold proof, or to improve the potential distribution of the electric field and protect conductors. Therefore, it is required that insulation materials have the highest possible insulation resistance, heat resistance, and moisture resistance, as well as a certain degree of mechanical strength.