In this article, we have examined flat and round cables. Most cables are round, which is generally a suitable structure. با بررسی یک کابل برق معمول گرد، مشاهده می شود که عموما ساختار آن به صورت دسته ای سیم عایق شده است و توسط چند لایه از سایر مواد”پرکننده” احاطه شده که این لایه ها به منظور تامین ساختاری گرد و همچنین برای کاهش گرمایش اصطکاکی در حین حرکت کابل در نظر گرفته می شوند.این سیم ها و لایه های پر کننده به وسیله یک روکش بیرونی احاطه شده اند که آنها را در کنار یکدیگر نگه داشته و تا حدودی وظیفه محافظت شان را در برابر اشیا خارجی بر عهده دارد.
Although round cables are usually suitable for general use, there are some drawbacks to their structure..
Due to the use of multiple layers including wires, insulation and fillers, the work of heat dissipation from the wires in the round cable is difficult.. Despite efforts to reduce this heating, the frictional heating created inside the cable, which is caused by repetitive intermittent movements, still remains strong.. Also, the change in the electrical impedance of the cable is significant if the conductors are moved relative to each other.
In another comparison between flat and round cables, we see that in flat cables, each conductor is placed in parallel with its adjacent conductors in order to preserve the flat structure.. But in round cables, the conductors of the flat cable in the sheath do not move in their enclosure and thus the quality of their electrical parameters remains constant.. Also, the conductors in flat cable all have the same physical and electronic dimensions, so the signal and time delays between the signals in this type of cable are minimized..
The advantages of this type of cable are flexibility, reduction of electronic disturbances and efficiency in packaging.. The limiting factor in the use of these cables is the current need for this cable for unique capping methods, which require a lot of manual operations for their connections and preparation..
