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It is also known as short-circuit test (because it is the mechanical analogy of a transformer short-circuit test), [1] locked rotor test or stalled torque test. [2] From this test, short-circuit current at normal voltage , power factor on short circuit, total leakage reactance , and starting torque of the motor can be found.
Advanced Placement (AP) Human Geography (also known as AP Human Geo, AP Geography, APHG, AP HuGe, APHug, AP Human, HuGS, AP HuGo, or HGAP) is an Advanced Placement social studies course in human geography for high school, usually freshmen students in the US, culminating in an exam administered by the College Board. [1]
Static Rollover is a rolling action when the helicopter blades are not in rotation. When the rotor blades stop, the helicopter has the same principles of any other object and will roll if the static rollover critical angle is exceeded. Each helicopter has its own critical angle; this is a byproduct of its center-of-gravity.
Locked-rotor torque (torque at 100% slip), 75–275% of rated torque; Pull-up torque, 65–190% of rated torque. Over a motor's normal load range, the torque's slope is approximately linear or proportional to slip because the value of rotor resistance divided by slip, ′ /, dominates torque in a linear manner. [38]
Rotordynamics (or rotor dynamics) is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures. It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk storage .
This creates torque that pulls the rotor into alignment with the nearest pole of the stator field. At synchronous speed the rotor is thus "locked" to the rotating stator field. This cannot start the motor, so the rotor poles usually have squirrel-cage windings embedded in them, to provide torque below synchronous speed. The machine thus starts ...
Typical rotorcraft blades have a Lock number between 3 and 12, [4] usually approximately 8. [5] The Lock number is typically 8 to 10 for articulated rotors and 5 to 7 for hingeless rotors. [3]: 186 High-stiffness blades may have a Lock number up to 14. [4] Larger blades have a higher mass and more inertia, so tend to have a lower Lock number.
This glossary of geography terms is a list of definitions of terms and concepts used in geography and related fields, including Earth science, oceanography, cartography, and human geography, as well as those describing spatial dimension, topographical features, natural resources, and the collection, analysis, and visualization of geographic ...