Advantages of stator insulation coating

What are the advantages of stator coating?

Slot insulation is a key factor that needs to be carefully considered during motor design. If the selection is incorrect, it will not only reduce the slot fill factor of the winding but also cause the slot insulation of the motor to break down and fail during high - voltage testing. Moreover, an incorrect selection may also lead to an increase in winding costs.

Generally, during motor design, methods such as injection molding, slot paper, or stator insulation coating are adopted. So, what are the advantages of stator insulation coating compared to injection molding and slot paper?

1. The thickness can be controlled. The thickness can be adjusted according to different voltage - withstand requirements, thereby saving winding space and reducing the slot fill factor.

2. Stator coating can reach the H grade, withstanding a temperature of 180 degrees and a maximum voltage of 4000V.

3. Using an electrostatic coating machine can achieve a daily production volume of 20,000 units.

4. The iron core coating product has good adhesion, which can improve the strength of the iron core.

5. The color of stator coating is optional.

Generally, electrostatic coating or thermoelectric coating can be used for insulation coating. Their main advantages and disadvantages are as follows:

1. The thickness of electrostatic coating is thinner, and the uniformity of the coating thickness is better.

2. Electrostatic coating is generally only applicable to outer - rotor motors, and the size compatibility of different machines is limited.Thermoelectric coating can be applied to a wide range of products and can meet the coating requirements of products with various complex shapes, including inner - rotor, outer - rotor, coreless, special - shaped motors, and copper bars.

3. It is difficult for the single - pass thickness of electrostatic coating to exceed 0.5mm. Generally, a thicker coating needs to be completed in two passes.

4. The production efficiency of electrostatic coating is higher. An automatic coating machine can generally coat more than 20,000 stators per day, while the efficiency of thermoelectric coating is lower. Generally, a person can only coat dozens of stators per day.

Generally, the process of iron core coating includes the following steps:

1. Ultrasonic cleaning

2. Baking to remove stamping oil, lubricating oil, and anti - rust oil

3. Fixture installation

4. Spraying

5. Fixture disassembly

6. Baking and curing

7. Voltage - withstand test and thickness detection