It is an electromechanical device that transfers the electrical signals and power from a stationary to a rotating structure. It can require rotation while transfer of signals and power. The slip ring also improves the simplify system solution, mechanical performance and eliminate damage prone wires. Mostly every electromechanical device used slip rings. This is consisting of solid and liquid metal brushes. They both have a role in the functioning of the equipment and machines. It helps to simplify the operation of the mechanical system. And it also helps to remove the dangling wires from the rotary joints.
In the slip rings the metal brushes are attached that helps in conducting current between the rotating shaft and the stationary wires. The slip rings basically used different types of brushes one is carbon brush and the other one is graphite brush and copper. But mostly copper brush is used for better result. The slip ring is also known as rotating electrical connector, rotary electrical interface, swivels, electrical rotary joints, and collectors. These are mostly available as the electrical generator for the alternating current system, slip rings motors, alternators, cable reels, wind turbines, and in packaging machinery.
The slip rings are used to transfer analog signals, digital signals that include data like rotating tanks, radio telescopes, aerodrome beacons, power shovels, and heliostats. The slips rings can use in rotating the object to transmit control circuits and power. It is an electrical engineering object that is used to make connection electrically through a rotating assembly. When the metal ring is going to turn, the signals and an electrical current is conducted through the stationary rush of the metal ring.
Main types of slip rings are
- Mercury wetted slip ring
- Wireless slip ring
- Pancake slip ring
The slip rings are used in hydroelectric generator
- It is a top end of the generator
- It has a rotating steel contact ring.
- It is a stationary spring loaded and a graphite brush
- It has an insulated connection with the generator field
The other rings and brushes are assembled with the rotating axis if need more electric circuits accept one. The components worked in rotating position and the rings or brushes are stationary. These types of rings are used in a low friction environment and high speed in working. The slip rings are worked for signals and electrical power similar to a rotary union do for fluid media. It is also used to send data and power. These are made in different sizes and types. The slip ring commutator is used almost in every machine in their different types.
The small alternators are found mostly in every car. When the current is following in the winding field so, the voltage of the machine internally may be changed. This may allow the positive DC power and negative DC power connection to the rotor. Mostly AC makers used a brushless exciter machine with spinning diodes to get DC to power for the rotor. They are the conductive rings that are transmitting the rotating part of the equipment. They carry the AC and DC power it depends on the application.
It is based on different parts that are given there
3- Brush and holder
5- Insulation between bar and shaft
6- Copper bar
7- Insulation between bar
8- Armature coils
9- Coil ends soldered to commutator
The commutators have multiple individual’s bars of conductive material. The brushes in slip rings meet all the requirements to rotary union speed. The brushes are fabulous in the industry field. This is the only way to make the equipment smooth and suitable. Basically, the slip rings are beneficial for those devices that have long life working, weak signals, and high-speed rotation.
The requirement and technical things in slip rings are
1- Types of slip ring brushes are listed there
- Carbon brushes
- Silver brush
- Copper brush
- Graphite brush
- Molybdenum brush
2- The metal alloy monofilament like AUNI9
3- They are designed especially for electric connection
4- They are putting the single metal brush into the metal tube.
The brushes are wide in the applications. The most common application in carbon brushes is robotics, medical equipment camera system, and a wide range of automation system. The slip rings are designed for a flexible environment and high performance for the performance of slip rings and brushes. These are rotating constantly from 360 Degree Celsius. The wires are connected with the rotating parts. The electrical engineer faces the wire winding problem. The metal brushes are used to conduct the current with the rotary shaft and stationary wires. To make the improvement in the generators and electric machines so, need to connect the metal wires of the rotor properly to accomplish the electric circuit.
The brushes and the rotary joints have the power to conduct electricity in high resistance of voltage. It proves helpful in communication with power and data signal inside the electrical machine. They are consist of various parts are conductive rings, resin bonding material, elastic material, brushes, and small steel bearing. It is also referred to as adapters, rotating joints, return rings, and current collector. It can move continuously about 360 Degrees even it completes the electric transformation. The rotor is made of steel. The rotor has two winding faces; one is 2 single phase winding slots and other 3 single phase winding slots. The winding is gone end at the 2 points one is ended by slip ring other is end by rotary part. Basically, brushes are used to connect both ends of the connection and winding with the three insulated slip ring. The brushes of slip rings are automatically lifted up when the electric machine is operated. That is why the signal transfers an electric current directly from the stator to the rotating part of the slip ring. The rotors can conduct high resistance.
The features of slip ring brushes
1- It can transfer the high current power
2- Carbon brushes are used less except electronic brushes
3- Different weights in brushes