absorption dynamometer
Quick Summary
An absorption dynamometer is a device used to measure the power transmitted by a rotating shaft by absorbing the energy. It works by creating a constant resistance to the shaft's rotation through mechanical friction, fluid friction, or electromagnetic induction.1
Examples of absorption dynamometers include:
* Prony brake: Uses mechanical friction from brake blocks on a pulley.1
* Water brake: Circulates water between an impeller and a stationary shell to create resistance.1
* Electric dynamometer: Generates and absorbs direct-current electricity or eddy currents.1
These devices measure torque, which is then used with the shaft's speed to determine power output. The element creating the resistance is cradled, allowing the force used to arrest its rotation to be measured at a specific distance from the axis, thus calculating torque.1
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