What is meant by damping torque?
What is meant by damping torque?
Damping torque is defined as the physical process of controlling the movement of a system by producing the motion such that it opposes the natural oscillation of the system. An indicating instrument provides the damping torque.
What is air friction damping in measuring instruments?
Air friction ‘or’ pneumatic damping: In this system, a light aluminum piston is attached to the spindle of the instrument and is arranged to move in a fixed air chamber closed at one end. The compression and suction action of the piston on the air in the chamber damp the possible oscillations of the moving system.
What is the definition of air friction damping?
Air Friction Damping : It consists of a piston placed in an air chamber closed at one end. The other end of the piston is connected to the pointer. The damping torque is produced due to air pressure created in the air chamber by the piston movement.
What is damping torque how it is classified?
The damping torque is proportional to the speed of rotation of the moving system, that is Tv = kv d dt θ Damping Torque. We have already seen that the moving system of the instrument will tend to move under the action of the deflecting torque.
Which damping is most efficient?
Eddy current damping
Eddy current damping ‘or’ Electromagnetic Damping: It is the most efficient type of damping.
Which damping is usually preferred?
Which type of damping is generally preferred in case of instruments having weak magnetic field? (d) hysteresis damping. Answer: (a) air friction damping.
Why is damping torque necessary in measuring instruments?
In a measuring instrument, the damping torque is necessary to bring the moving system to rest to indicate steady reflection in a reasonable short time. It exists only as long as the pointer is in motion.
How many damping methods are there what are they explain fluid friction damping 7?
In this article, you will learn about four different types of damping systems namely air friction damping, fluid friction damping, eddy current damping and electromagnetic damping.
Is air damping greater than oil damping?
This form of damping is similar to air friction damping. Oil is used in place of air and as the viscosity of the oil is greater, the damping force is also correspondingly greater. A disc is attached to the moving system, this disc dips into an oil pot and is completely submerged in oil.
Why damping torque is required to give methods of damping?
Damping torque is used to enable fast and accurate reading of an object that undergoes oscillation. Due to inertia, an object in motion tends to stay in motion, thus requiring a counteractive force to bring it to its final rate of oscillation in a short period of time.
When damping torque is more than the optimum the instrument will become?
15. When the damping force is more than the optimum, the instrument will become. (d) fast and sensitive.
What is the controlling torque?
What is controlling torque? The controlling torque (Tc) opposes the deflecting torque and increases with the deflection of the moving system. The pointer comes to rest at a position where the two opposing torques are equal i.e. Td = Tc. The controlling torque performs two functions.
