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The torsional deflection of a simple cylinder cannot radiate efficiently acoustic noise, but with particular boundary conditions the stator can radiate acoustic noise under torque ripple excitation. [8] Structure-borne noise can also be generated by torque ripple when rotor shaft line vibrations propagate to the frame [9] and shaft line.
Stalling also happens when the driver forgets to depress the clutch and/or change to neutral while coming to a stop. [3] Stalling can be dangerous, especially in heavy traffic. [1] A car fitted with an automatic transmission could also have its engine stalled when the vehicle is travelling in the opposite direction to the selected gear. [4]
The smaller, enclosed fans produce less noise, particularly at higher machine speeds. [8] Alternators can also be water-cooled in cars. Larger vehicles may have field coil alternators similar to larger machines. [9] The windings of a 3 phase alternator may be connected using either the delta or star (wye) connection regime set-up. [10]
The result is an engine that fails to maintain idle RPM and frequently stalls. A jammed actuator may be freed simply by cleaning it. However an actuator that has stopped working due to a fault in its servomotor will need replacement. Air leaks in either the stepper housing or pipes will cause elevated idle RPM.
If one machine is slightly out of phase it will pull into step with the others but, if the phase difference is large, there will be heavy cross-currents which can cause voltage fluctuations and, in extreme cases, damage to the machines. From top to bottom: synchroscope, voltmeter, frequency meter. When the two systems are synchronized, the ...
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Axi-symmetric stall, more commonly known as compressor surge; or pressure surge, is a complete breakdown in compression resulting in a reversal of flow and the violent expulsion of previously compressed air out through the engine intake, due to the compressor's inability to continue working against the already-compressed air behind it. The ...
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