Metal Materials of Motor Slip Rings

Motor slip ring is a key component used in three-phase wound motor and DC motor phase changer, an important part of dynamic electrical connection, more commonly used conductive ring materials such as copper, steel and stainless steel, different materials in addition to cost factors, its suitability with the operating environment, as well as its own operating system to ensure a greater relationship.

ZCL group introduces you to the common materials of slip rings.

Copper

Copper slip ring is one of the more common ones, the conductivity of copper is good, but its material is relatively soft, the motor is relatively easy to be worn during operation, especially when the carbon brush material is hard, and when the radial force on the carbon brush is large during operation, it is very easy to cause the fact that the slip ring surface is seriously damaged, which leads to serious failures such as collector ring firing and heating.

Steel

Steel slip ring is relatively economical compared to copper and stainless steel, and the wear resistance of steel material is relatively good, but the material is easy to rust in a humid environment, which is a problem that must be noted in the production, processing and operation of the motor. In order to avoid such problems, the non-machined surface of the steel slip ring should be treated with rust prevention, and the joint surface with the carbon brush should be made to form a protective film on its surface through the grinding of both.

Stainless steel

Stainless steel slip ring in large high-voltage motor applications, especially for the operation of relatively humid environment, the environment has corrosive gases, slip ring replacement is relatively difficult, the choice of stainless steel slip ring, can ensure its long-term operation without wear, the motor operation to play a better role in ensuring, but from the perspective of processing, stainless steel slip ring mechanical processing has a certain degree of difficulty, the necessary processing equipment is required to ensure.

Other

In addition to the above commonly used slip ring materials, in some high stability equipment will also use other high-performance materials to meet its electrical conductivity, anti-corrosion, wear resistance and other various alloy materials.

Low frequency slip rings use sliding contact to transmit low frequency signals and energy slip ring components. The usual slip rings are cylindrical slip rings and differential slip rings. The conductive rings of cylindrical slip rings are further divided into flat rings and V-shaped rings. The material of the conductive ring usually uses purple copper, brass, coin silver and gold. Brushes have palladium, gold alloy or gold-plated wire brushes and copper-graphite synthetic brushes.

Insulation materials

With the slip ring matching insulation materials, is also the key to slip ring quality assurance, slip ring as a conductive parts, insulation part should ensure good insulation between the ring and ring, ring and shaft, and to ensure that it for the adverse effects of the operating environment, as well as processing, operation process of other effects, such as: mechanical strength, processing performance, electrical performance, moisture resistance, temperature specificity, etc..

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