Slip is the relative difference between the speed of the rotating magnetic field of the stator windings and the speed of the rotor. The rotor must always run at a speed lower than the synchronous speed otherwise the rotor windings will not be cut by the magnetic field and hence no induced emf,no torque and the rotor will stand idle.
The dark phase occurs during the night when there is no sunlight or natural light, resulting in darkness. This is the time when many animals and plants rest and undergo various physiological changes in response to the lack of light. In humans, the dark phase is also crucial for hormonal regulation and sleep patterns.
The ball bearings in the motor probably need to be changed. If the motor does not have ball bearings then the bushings have worn out and the motor armature is dragging on the stator. Don't run this motor until the bearing have been repaired as excessive wear on the stator from armature rubbing will introduce metal filings into the stator windings which could short out and destroy the motor. If it's the normal operating noise that you're asking about, a three phase motor has a smoothly spinning magnetic field driving it's rotor that has almost no uneven motion, and produces almost no vibration in the iron parts of the machine. A single phase motor runs with a pulsating field that swaps polarity twice per cycle, but DOESN'T actually rotate. This causes the iron in the motor to vibrate slightly whenever the AC is applied, and this vibration causes the noisier operation of a single phase motor compared to a three phase motor. Single phase motor running noise can be reduced if the start winding li left partly energised during normal running. For instance, some room air conditioners leave a small capacitor connecting the starting winding so it delivers partial power during running to give a 'sort-of' rotating field in the single phase compressor motor, which helps to reduce the 'pulsating' component and enhance it with a 'rotating' field that quietens the compressor down while you're trying to sleep.....
There are three circadian rhythm sleep disorders. Delayed sleep phase type is characterized by going to bed and arising later than most people.
REM
they go into a resting phase which is a phase where they use less energy
Yes ;)
Deep sleep occurs primarily during the stage known as NREM (non-rapid eye movement) sleep, specifically in stages 3 and 4. This phase is characterized by slow brain waves, minimal muscle activity, and a decreased heart rate and breathing rate. Deep sleep is crucial for physical recovery, growth, and overall health, as it is when the body performs essential repair and maintenance functions.
Sleep paralysis typically occurs during the stage of sleep known as REM (rapid eye movement) sleep.
Rapid eye movement is common during sleep but when it happens when a person is awake, it is considered to be abnormal and is called nystagmus. It is often caused by the abnormal function in part of the brain or the inner ear.
gamma-amino butyric acid
Dream sleep generally is considered as a good sleep. Dreamless sleep occurs when the person is very much tired. That sleep affects the person in a negative manner.
This usually occurs in REM sleep, when dream states occur. It is not necessarily pathological.