Regarding motor insulation, these issues are critical!
Release time:
2024-12-29
The insulation of the motor includes the insulation between the coils, between turns, between rows, between layers, and to the ground. It also includes various insulating components used for supporting or fixing at the ends, as well as the insulation of connecting wires and lead wires.
1. What aspects does motor insulation include?
Answer: Motor insulation includes the insulation between the coils, turns, rows, layers, and insulation to ground, as well as various insulating components used for supporting or fixing at the ends and the insulation of connecting wires and leads.
2. What is the main insulation of the coil?
Answer: The main insulation of the coil refers to the insulation between the coil and the machine body and other windings, commonly referred to as insulation to ground.
3. What is turn-to-turn insulation?
Answer: Turn-to-turn insulation refers to the insulation between the turns of the same coil.
4. What is strand-to-strand insulation?
Answer: Strand-to-strand insulation refers to the insulation between the strands within the same turn, generally the insulation of the winding wire itself.
5. What is row-to-row insulation?
Answer: Row-to-row insulation is the insulation of several parallel rows of wires.
6. Why do people compare the coil to the heart of the motor?
Answer: The insulation structure of the motor serves to isolate electricity, but some also provide mechanical support and fixing. During long-term operation, the motor insulation is affected by electrical, thermal, mechanical forces, and different environmental conditions, leading to gradual aging of the insulation, which ultimately results in loss of performance and insulation breakdown, making it unsafe to continue operation. Therefore, the reliability and lifespan of the motor are largely determined by the insulation of the coil, which is why people compare the coil to the heart of the motor.
7. What are the basic factors that commonly cause damage to motor coil insulation?
Answer: The basic factors that commonly cause damage to motor coil insulation include heat, electricity, mechanical forces, and environmental conditions.
8. What are the main heat resistance grades of motor winding insulation?
Answer: Motor winding insulation can generally be divided into: Class B, Class F, Class H, and Class C.
9. What are the main factors that determine the insulation structure of low-voltage motors?
Answer: The main factors are the slot shape, winding method, insulation materials, and insulation treatment processes.
10. What determines the slot shape of medium and small motors? What slot shape is generally used for small low-voltage motors?
Answer: The slot shape of medium and small motors is determined by capacity, voltage, and winding type, while small low-voltage motors generally use semi-closed slots.
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