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In AC synchronous generators (alternator), the rotor should turn continuously and smoothly at its rated speed. When loaded, a synchronous alternator can become unstable, that is while rolling it also begins to rock back and forth slighty (this can easily be seen with a strobe light shining on a black mark placed on the end of the shaft, the mark is stationary as the light flashes and then the mark begins to rock clockwise and counter clockwise). The reason is the load torque pressing against the magnetic field traveling around in the alternator and then bouncing off the magnetic field until it catches up again. Remember when a generator loads up by supplying electric power it also gets harder to turn, so what ever is turning the generator has to push harder. Imagin pushing a wheeled cart with a coil spring. The task could get bouncy or "boingy"as the cart runs ahead then slows down. This phenomenon may disturb the generated current waveform and maybe even cause early bearing failure or damage a steam turbine that is turning a large alternator. To stop or reduce the instability is called dampening or damping. A special damping winding is built in the generator. Sometimes called an Amortisseur winding. Roger nsc@psu.edu
What else can I help you with?
What is the technique used for damping torque?
Damping torque is typically achieved through the use of viscous damping or frictional damping mechanisms. Viscous damping involves the use of a fluid, such as oil, to create resistance against the motion of a moving part, thereby dissipating energy and reducing oscillations. Frictional damping relies on the contact between surfaces to generate resistance, which also serves to dampen motion. Both techniques are commonly employed in various mechanical systems to enhance stability and control.
What is The damping factor of an active filter?
good things
What is use of cushion in hydraulic system?
to absorb the vibration damping.
Advantage of critical damping over under damping and over damping?
A system that is critically damped will return to zero more quickly than an overdamped or underdamped system. Underdamping will result in oscillations for an extended period of time, and while overdamped things will return to zero without much (or any, I think) oscillations they will get there more slowly.
When was The Winter of Discontent - The Generators - created?
The Winter of Discontent - The Generators - was created in 2005.
What is negative damping?
It is the opposite of normal damping (oscillation decreases), so in negative damping to get even bigger oscillation.
How can you decrease the degree of damping?
You can decrease the degree of damping by reducing the amount of friction or resistance in the system. This can be achieved by using lighter weight damping materials, adjusting the damping coefficients, or using a less viscous damping fluid.
What is the damping ratio formula used to calculate the damping ratio of a system?
The damping ratio formula used to calculate the damping ratio of a system is given by the equation: c / (2 sqrt(m k)), where is the damping ratio, c is the damping coefficient, m is the mass of the system, and k is the spring constant.
How can one determine the damping ratio in a system?
The damping ratio in a system can be determined by analyzing the response of the system to a step input and calculating the ratio of the actual damping coefficient to the critical damping coefficient.
What is the definition of viscous damping and viscous damping coefficient especially in Civil Engineering.?
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What is geometric damping?
Geometric damping is also called radiation damping. It is defined as energy radiation into a surrounding medium. Damping is defined as energy dissipation property of structures and materials that are put through time-variable loading.
What is damping level?
In the damping level the level view and vertical spindle are crossed together...
Which type of damping occurs in automobile's suspensions?
The two most common types of damping in automobile suspensions are hydraulic damping and gas damping. Hydraulic damping uses fluid to dissipate energy and control vibrations, while gas damping uses gas-filled chambers to absorb and reduce shock. Both types work to provide a smoother and more controlled ride for the vehicle.
What is the equation for calculating the damping ratio in a system?
The equation for calculating the damping ratio in a system is given by the formula: c / (2 sqrt(m k)), where is the damping ratio, c is the damping coefficient, m is the mass of the system, and k is the spring constant.
Damping ratio of higher order systems?
In higher order systems, the damping ratio is determined by the ratio of the actual damping in the system to the critical damping value corresponding to the highest order term in the system transfer function. The damping ratio influences the system's response to a step input, affecting overshoot and settling time. High damping ratios result in quicker settling times but may lead to more overshoot.
How do you calculate the damping coefficient in a system?
The damping coefficient in a system can be calculated by dividing the damping force by the velocity of the system. This helps determine how much the system resists oscillations and vibrations.
What is a gradual loss of amplitude of an oscillator called?
This is known as damping. Damping refers to the gradual decrease in the amplitude of an oscillator's motion due to the energy dissipation in the system.
