The large current slip ring mainly refers to the current rating at 50A above, This kind of slip ring is different from the signal and the ordinary small current slip ring.As the transmission current is very large, so the contact resistance and the fluctuation of the rate of change of resistance are required to be very high. As we all know: power = current square * resistance,the contact resistance is very large, then the heating situation is very serious.Therefore, CENO Electronics design in large current slip ring and large current slip ring must be need to pay more attention to these two points, second, the large current slip ring have high request for voltage change, when the current is very big it’s very easy to produce a kind of call the effect of the electrical fire, will have a great impact on the life of the slip ring
Then how to make a large current slip ring?In the traditional process, the high-current slip ring mainly has surface contact and point contact. Surface contact mainly refers to the large-area contact between the carbon brush and the ring inside the brush.The point contact is mainly made of precious metal and fiber brush. The two technologies have their own advantages and disadvantages.Fiber brush contact ring mainly depends on point contact, the number of fiber brush to contact area to ensure that the contact area is small enough.Although the influence of point contact mode on the life of the conductive slip ring is positive, the blind end of point contact is prone to break.burn out, etc., therefore, brushes bit contact with fibre to design the condition of the large current conductive slip ring, we must use very high electrical conductivity of silver copper wire, the electrical conductivity of the surface coating to have very good, want to use silver, silver copper coating, the surface contact large current slip ring in the market share of over 70%, is a kind of mature technology, cost is low, but the disadvantage is that area is too big, life is not long enough.
CENO Electronics provide below big current rating slip rings ,any supports please contact us freely .more products please see below link :