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In this way, applying power to the "open damper" terminal causes the motor to run until the damper is open while applying power at the "close damper" terminal causes the motor to run until the damper is closed. The motor is commonly powered from the same 24 volt AC power source that is used for the rest of the control system. This allows the ...
Figure 1: Components of a centrifugal fan An external motor belt driven inline centrifugal fan discharging inline to the exterior of a building through a duct. Unlike non-inline/non-concentric impeller casing design with a cutoff blade above, the concentrically symetric cylinder casing and impeller geometry of inline type redirects the outflow around so that it is parallel to the inflow of gases.
The Geislinger damper utilizes steel leaf springs and engine oil. A related device is the Geislinger damper. [5] This is broadly the same coupling, but both input and output shafts are connected to the same central hub. The massive outer casing is connected to this through similar leaf spring packs, but is free to move torsionally, with damping.
A simpler variant of the motorized design omits the switch that detects the valve position. The motor is simply driven until the valve hits a mechanical stop, which stalls the motor. In an alternative design, the motor continues to turn, while a slip clutch allows the valve to be pushed against a mechanical stop. Usually, the valve remains open ...
Bars and rings of the damper (amortisseur) winding of an AC generator (General Electric, early 20th century). Note the gaps in the cage along the quadrature axes. The damper winding (also amortisseur winding [1]) is a squirrel-cage-like winding on the rotor of a typical synchronous electric machine. It is used to dampen the transient ...
A fluid coupling cannot develop output torque when the input and output angular velocities are identical. [7] Hence, a fluid coupling cannot achieve 100 percent power transmission efficiency. Due to slippage that will occur in any fluid coupling under load, some power will always be lost in fluid friction and turbulence, and dissipated as heat.
An internal fan-cooled electric motor (colloquially, fan-cooled motor) is a self cooling electric motor.Fan cooled motors feature an axial fan attached to the rotor of the motor (usually on the opposite end as the output shaft) that spins with the motor, providing increased airflow to the motor's internal and external parts which aids in cooling.
IEC 60481 Coupling devices for power line carrier systems; IEC 60483 Guide to dynamic measurements of piezoelectric ceramics with high electromechanical coupling; IEC 60487 Methods of measurement for equipment used in terrestrial radio-relay systems; IEC 60488 Higher performance protocol for the standard digital interface for programmable ...