How to choose the insulation grade of the motor, and what are the insulation grades of the motor?

Boding insulation materials, electronic plastics

1. Polyester film insulating paper soft composite material: model 6520, insulation grade E (120), nominal thickness (mm) Suitable for motor micro motor, fractional horsepower motor, Y series motor, high voltage motor, generator, electronic transformer, power transformer.

2. Polyester film polyester fiber non-woven soft composite material: model 6630 (B-DMD), insulation grade B (130), nominal thickness (mm).

Product composition: The product is an insulation variety made of polyester film and polyester fiber non-woven fabric by adhesive compounding.

Performance and use: It is mainly suitable for 130-level insulation treatment such as slot insulation, inter-turn insulation, phase insulation, interlayer insulation and other slot insulation, as well as dry-type transformer insulation treatment.

3. Polyester film polyester fiber non-woven soft composite material: model 6641 (F-DMD), insulation grade F (155), nominal thickness (mm).

4. Polyester film polyaramid fiber paper soft composite material: model 6640 (NMN), insulation grade F (155), nominal thickness (mm).

Product composition: The product is a three-layer (NMN) soft composite material made of polyester film (M) pasted on both sides of Dupont Nomex aramid fiber paper (N).

Performance and use: The product has excellent heat resistance, dielectric and high mechanical strength, and is suitable for groove, interphase, turn and gasket insulation in F-class motors and electrical appliances.

5. Polyimide film polyarylamide fiber paper soft composite material: model 6650 (NHN), insulation grade H (180), nominal thickness (mm).

Product composition: Three-layer (NHN) soft composite material made of polyimide film (H) pasted on both sides of DUPONT NOMEX aralamide fiber paper (N).

Performance and use: The product is currently the highest grade composite insulation material, with excellent heat resistance and good electrical and mechanical properties, suitable for H-class motors, electrical appliances groove, interphase, turn and liner insulation; B, F class motors, special parts of electrical appliances can also be used.

The insulation grade of the motor is divided according to the heat resistance grade of the insulating material used, which is generally divided into 5 grades

1. Grade A 105 degrees.

2. Class E 120 degrees.

3. Grade B 130 degrees.

4. F grade 155 degrees.

5. H grade 180 degrees.

Generally, the insulation material is selected according to the use environment and safety level of the motor.

The key insulation materials in the motor are:

Enameled wire for motor windings;

Insulating paper is used for the insulation of windings and stator cores;

Dipping paint for insulation and moisture protection;

Insulating sleeve is used for insulation at the junction of motor leads and winding wires.

What environment you use it in, tell the manufacturer specifically, and the manufacturer will match it for you.

Divided into A, E, B, F, H grades, the insulation grade of the motor refers to the heat resistance level of the insulation material used.

In order of temperature, they are: y, a, e, b, f, h and c. Their permissible operating temperatures are:

and 180 or more. When the generator is working, the user should ensure that the generator insulation material does not exceed the temperature to ensure the normal operation of the generator.

Classification of electric motors1. Classification according to the working power supply according to the different working power sources of the motor.

It can be divided into DC motor and AC motor. Among them, AC motors are also divided into single-phase motors and three-phase motors.

2. Classification according to structure and working principle.

According to the structure and working principle, the motor can be divided into DC motor, asynchronous motor and synchronous motor, and synchronous motor can also be divided into permanent magnet synchronous motor, reluctance synchronous motor and hysteresis motor with distribution.

The above content reference: Encyclopedia - Motor Insulation Grade, Encyclopedia - Motor.

<> according to the degree of heat resistance, the insulating materials are divided into 6 levels, such as A, E, B, F, H, and C

1. Class A insulation temperature resistance 105 degrees Celsius;

2. Class E insulation temperature resistance 120 degrees Celsius;

3. Class B insulation temperature resistance 130 degrees Celsius;

4. Class F insulation temperature resistance 155 degrees Celsius;

5. H-grade insulation temperature resistance 180 degrees Celsius;

6. Class C insulation temperature resistance is more than 200 degrees Celsius.

There is a close relationship between the insulation grade and the temperature resistance of the insulation, because the higher the temperature, the worse the insulation performance of the material. Therefore, different grades of insulation have a maximum permissible operating temperature, within which they can be safely used.

The insulation grade of the motor is divided according to the heat resistance grade of the insulating material used, which is generally divided into 5 grades

1. Grade A. 105 degrees.

2. Grade E. 120 degrees.

3. Grade B. 130 degrees.

4. F grade. 155 degrees.

5. H-level. 180 degrees.

Generally, according to the use environment and safety level of the motor, the key insulation materials in the motor are:

Enameled wire for motor windings;

Insulating paper is used for the insulation of windings and stator cores;

The insulation grade of the electric motor is graded according to the withstand voltage of its insulating material. Common insulation grades are A, E, B, F, H grades, of which A is the lowest grade and H is the highest grade. Different insulation levels correspond to different withstand voltages, and the field return is the highest voltage value that the motor can withstand in different working environments.

Generally speaking, the higher the insulation level, the higher the safety performance of the motor, but the cost will also increase accordingly.

The motor insulation grade refers to the ability of the motor insulation material to resist electrical breakdown, also known as the motor insulation strength. It is an important parameter to measure the safety performance of the motor. The common insulation grades are Class B, Class F, Class H, etc., among which, Class H has the highest insulation grade, the strongest resistance to electrical breakdown, and can withstand higher working voltages in Changzheng.

Generally speaking, the higher the insulation grade of the motor, the better its safety performance, but correspondingly, the production cost will also increase. Therefore, when choosing an electric motor, you need to make trade-offs on a case-by-case basis. For some motors with high safety performance requirements, such as motors used in petrochemical, coal mines, ships and other fields, the insulation level of H class and Xiao Xundan or above should be selected to ensure its safety and reliability in the high-voltage working environment.

In addition, the insulation level is also related to the service life of the motor. The service life of Class H shut-off material is to a certain extent longer than that of Class B and Class F. Therefore, in some long-term operation occasions, especially some unattended occasions, motors with higher insulation levels should be selected to better ensure the safety and stability of production and operation.