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Why a machine should run with synchronous speed?
A synchronous motor is not self starting.However when it is provided with some prime mover ,which rotates it up to 80% of sync. speed,then it continues to rotate at sync.speed even after prime mover is removed.It happens so because rotor poles are locked with rotating magnetic field and hence the speed is always synchronous.
What is coherent and non coherent detection reception?
1AnswerA coherent detector uses the knowledge of the phase of the carrier wave to demoduleate the signal.it's simply a product device , which multiply the AM signal by a sinusoidal signal having the same carrier frequency , followed by a low pass filter ( LPF). The product will shift the AM signal to 0 Hz and double carrier frequency , and the LPF will eliminate the later component.2ANSWER:Coherent detectioninCoherent detectionrequires carrier phase recovery at the receiver and hence, circuits to perform phase estimation.Sources of carrier-phase mismatch at the receiver:inPropagationtalking causes carrier-phase offset in the received signal.inThe oscillators at the receiver which generate the carrier signal, are not usually phased locked to the transmitted carrier.coherent detection: Huge need for a reference in phase with the received carrierinLess complexity compared to incoherent detection at the price of higher error rate.Coherent ( synchronous ) detection: in coherent detection , the local carrier generated at the receiver in phase locked with the carrier at transmitter .Non coherent ( envelope ) detection : this type of detection does not need receiver carrier to be phase locked with transmitter carrier
When the starter armature is stalled current is?
"Full locked amperage" or "Full locked start-up Amperage" is what I was taught.
How do you beat locked cabin?
Go through the window.
What is LRPDV?
LRPDV is Locked Rotor Pull-down Voltage.
Why is the frequency of a synchronous generator locked into its rate of shaft rotation?
By definition a synchronous generator must be synchronous. If it is not "locked in" it is not a synchronous generator, but an induction machine.
Why isn't mercury in synchronous rotation with respect to the Sun?
The Sun created a significant tidal bulge on Mercury when it was still a young, molten planet; when the planet solidified, this bulge was locked in place. Mercury is so close to the Sun that the Sun's gravitational force on Mercury's tidal bulges changed the planet's rotation rate. However, Mercury's highly eccentric orbit has prevented the planet from getting locked into synchronous rotation.
What is the rotation of phobos?
The rotation of Phobos is Synchronous meaning ''Existing or occurring at the same time.''
What State is at which the moon orbital and rotational periods are equal?
A state of `synchronous rotation`. Its where the rotational period of the moon is equal to orbital rotation period about Earth, one face of the moon will always appear to face earth. In our moons case this is due to tidal locking.
When the Moon reaches equal periods of orbital and rotational periods it's known as rotation?
When a satelite's rotational period is the same as its orbital period, like our moon, the satelite is tidally locked to the body being orbited. Such a rotation rate is known as a synchronous rotation. The effect is that the same side of the satelite always faces the orbited body.
If you have the iPhone 4 and your keyboard rotation is either locked or the sensor is broke what do you do?
If the rotation is locked, unlock it! Otherwise send it to Apple for repairing.
Why SONET is called synchronous network?
Because SONET/SDH uses "synchronous TDM multiplexer" to multiplexe signals from multiple electrical sources . All clocks in the system are locked to a master clock.
When is the complete rotation of the moon?
The moon is tidally locked to the earth, so it's rotation and revolution are the same. About 29 days.
Because the moon rotates once for each revolution around earth?
The moon is tidally locked with the Earth, meaning that it rotates on its axis at the same rate that it orbits the Earth. This synchronous rotation is why we always see the same side of the moon facing towards Earth.
Why do you always see same side of moon?
The Moon is in synchronous rotation with the Earth [See link], which means it rotates on its axis about the same time as it takes to orbit the Earth. This results in it keeping the same face looking towards the Earth at all times. The Moon used to rotate at a faster rate, but years ago, its rotation slowed and became locked in this orientation as a result of frictional effects associated with tidal deformations.
What is the significance of synchronous rotation of the moon in relation to its orbit around the Earth?
The significance of synchronous rotation of the moon means that the same side of the moon always faces the Earth as it orbits around it. This phenomenon is important because it helps to stabilize the moon's orbit and creates tidal forces that affect Earth's oceans.
Why a machine should run with synchronous speed?
A synchronous motor is not self starting.However when it is provided with some prime mover ,which rotates it up to 80% of sync. speed,then it continues to rotate at sync.speed even after prime mover is removed.It happens so because rotor poles are locked with rotating magnetic field and hence the speed is always synchronous.
