Question

Which starter is used for slip ring induction motors of high ratings?

Answer 1

A slip ring is an electromechanical device that permits power and electrical signals to be transmitted from a fixed structure to a spinning structure. Any electromechanical device that requires rotation while delivering power or signals can benefit from the usage of a slip ring. It can increase mechanical performance, make system operation easier, and prevent cables dangling from moveable joints that might cause harm.

Complete step by step answer:
For slip ring induction motors with high ratings, a rotor resistance starter is utilised.
Starting wound rotor (slip-ring) induction motors is as simple as adding some additional resistance to the rotor circuit, as seen in fig. By adding more resistance to the rotor circuit, the beginning current is reduced while the starting torque is increased. It is unable to reduce beginning torque. It is possible to regulate the speed smoothly. One of the techniques for controlling the speed of an induction motor is to use rotor resistance control. The speed of a wound induction motor may be regulated by using slip rings to link an external resistance to the rotor circuit. In electrical engineering, a slip ring is a spinning component that is used to make an electrical connection. It's a type of electric transmission mechanism that lets energy travel between two electrical moving elements, such as those found in a motor. Slip Ring Motors are often used to start a load with a high inertia or one that demands a strong beginning torque across a wide speed range. The motor may provide maximum torque at a low current from zero to full speed by appropriately choosing the resistors put into the Rotor circuit.

Note: Resistors must be designed to accommodate the starting duty cycle without overheating or a significant change in resistance value while heated, as this affects the starting characteristics. Rotor Resistance Starters are extremely dependable, need minimal maintenance, are unaffected by harsh climatic conditions, and may be cyclone certified for outdoor use.