An eddy current coupling is a type of non-contact magnetic coupling used to transfer torque between two rotating components without any physical connection. It works by inducing eddy currents in a conductive material, creating a magnetic field that can transfer torque to a nearby component.
There are two main types of eddy current couplings: fixed and adjustable. Fixed couplings have a constant air gap, while adjustable couplings allow for varying air gaps to adjust the torque transfer. Additionally, there are also hybrid eddy current couplings which combine the benefits of both fixed and adjustable couplings.
Eddy current couplings work by using a magnetic field to transfer torque between two components. The primary component has a rotating magnetic field, while the secondary component has a conductive material that experiences induced eddy currents. These currents then create their own magnetic field, which interacts with the primary field and transfers torque between the components.
Eddy current couplings have several advantages over other types of couplings. They are non-contact, which means there is no physical connection between the components, reducing wear and maintenance. They also have a high torque transfer capability, are relatively compact, and have no mechanical backlash.
Eddy current couplings are commonly used in industrial machines and equipment, such as pumps, compressors, and turbines. They are also used in automotive applications, such as in hybrid and electric vehicles, as well as in power transmission systems for renewable energy sources like wind turbines. Additionally, eddy current couplings are used in test rigs and dynamometers for torque measurement and control.