What are the insulation structures of the coil
Information from:internet Published on:2022-03-02
Insulation structure is a structure formed by the combination of the same or several insulation raw materials through a specific process, which is called insulation structure. Focus on inter turn insulation, ground insulation and outsourcing insulation. If it is a three-phase motor, it will also touch phase to phase insulation. So what are the insulation structures of the coil?1. Turn to turn insulation Turn to turn insulation refers to the insulation between turns of the same coil, which separates the conductors with potential difference in the motor winding from each other to avoid turn to turn short circuit. For enamelled wire winding, turn to turn insulation is the insulating paint on the surface of electromagnetic wire, while for silk coated wire and mica wire, it is a composite insulating material bonded by specific insulating materials and insulating glue. Usually, the turn to turn insulation only depends on the insulation of the electromagnetic wire itself, such as enamelled wire, single glass wire or double glass wire. The insulation of glass fiber enamelled wire, polyimide film sintered wire, etc. Turn to turn insulation is the most important and usually weak insulation in the motor insulation structure. Therefore, when designing turn to turn insulation, we should pay attention to the selection of raw materials. During the manufacturing process, we must pay attention to that the conductor should be smooth without flash, burr, etc. and the turn to turn insulation should not be damaged by mechanical strain. 2. Insulation to ground Ground insulation refers to the main insulation outside the coil. Focus on receiving the rated voltage or possible overvoltage of the motor. Its working voltage is high, so its electrical function, mechanical function and thermal function must meet the requirements of the motor operation mode. The insulation thickness to the ground usually depends on the rated working voltage of the motor and the electrical and mechanical functions of the insulating raw materials. The higher the rated voltage of the motor, the more layers of insulation binding to the ground, or the thicker the paint film. 3. External insulation External insulation refers to the insulation outside the insulation of the coil to the tyrant. And its main function is to protect the insulation of tuhao from mechanical strain and make all coils strong and neat, which plays a reinforcing role in the main insulation. Most of the outer insulation adopts glass ribbon. 4. Interphase insulation Phase to phase insulation is the unique insulation of three-phase motor, which is the insulation between phases. For the scattered embedded winding, the interphase block is selected to separate the two phases, and the insulating hose will also be used at the end of the winding; The phase to phase insulation of hard winding is completed by using plate-shaped insulation raw materials or relative spacing space.
