The insulation material, leads, and coils of the linear motor coil should be selected based on the heat resistance of the motor. The thickness of the coil of a linear motor is determined by the motor. Due to molding, the design thickness needs to be greater than 0.5mm, and the iron core and coil are insulated with plastic resin. The coil frame material is nylon "66" or PBT, etc. The coil is made of polyurethane wire or polyester wire and is used according to the insulation level. The insulation level of permanent magnet stepper motors is generally below Grade A (105 degrees). The installation of lead wires varies depending on the manufacturer. The commonly used method is to fix the lead wire joint to the skeleton through touch casting.
In order to achieve the purpose of mechanical winding, the insulation structure of the motor linear motor coil has also been improved. The thickness of the stator core of the linear motor coil is half of the thickness of the motor. The skirt shaped insulation material is inserted into the slot, and all sides of the slot are covered with resin. The winding machine uses a shuttle to pull the wire for mechanical winding. One end of the coil is fixed on the terminal post, and the other end is connected and fixed before being led out from the lead outlet. Using this method, the stator and lead wires of the motor can be produced separately, making it easier to standardize the components. The linear motor coil of the motor adopts E-grade (120 degrees) insulation, and B-grade or F-grade insulation materials can also be selected according to special requirements.
The linear motor coil of the motor uses flat copper wire and copper strip. Insulation is made of materials with high heat resistance to increase allowable temperature rise and reduce coil volume. Double and triple insulated wires can reduce coil size.
The conductor of the motor linear motor coil is made of copper, silver, and gold thin films, and is patterned into comb like, spiral like, and sports field patterns. The insulation material is made of H-grade and C-grade materials. There are also multi-layer structures, or combinations of several multi-layer coils, or overlapping coils and magnetic cores.