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What is v curve and inverted v curve of sychronous motor?
what are v and inverted v curves of synchronous motor
Why an induction motor will never run at synhoronous speed?
An induction motor relies on low-frequency currents induced in the rotor by the difference in speed between the rotor and the rotating magnetic field. At sychronous speed the induced current is zero therefore the torque is also zero.
Why the DC motor is call as synchronous motor?
A 60Hz synchronous motor spins at synchronous speed - if it's a two pole motor it will spin at exactly 1800 rpms. An asynchronous motor will spin at a speed lower than the power supply frequency - a symilar asynchronous motor may spin at 1700 rpms.
What is the torque speed characteristic?
the ratio of the relative speed of stator magnetic field with the speed of rotor, to the speed of rotor is defined as slip. where as in torque slip characteristic is the graph between the speed of the rotor and the torque experienced on the rotor. in the case of induction motor, the torque decreases with the increase in the rotors speed. while in the case of sychronous motor, its different (you check out, because i just forgot about it!! keep smiling!
Why does a 3 phase motor turn slowly?
An induction motor relies on low-frequency currents induced in the rotor by the difference in speed between the rotor and the rotating magnetic field. At sychronous speed the induced current is zero therefore the torque is also zero.
What is v curve and inverted v curve of sychronous motor?
what are v and inverted v curves of synchronous motor
What is meant by sychronous motor?
This type of motor is electrically identical with alternaner that means ac generator and it is operate at constant speed.
Why an induction motor will never run at synhoronous speed?
An induction motor relies on low-frequency currents induced in the rotor by the difference in speed between the rotor and the rotating magnetic field. At sychronous speed the induced current is zero therefore the torque is also zero.
Why the DC motor is call as synchronous motor?
A 60Hz synchronous motor spins at synchronous speed - if it's a two pole motor it will spin at exactly 1800 rpms. An asynchronous motor will spin at a speed lower than the power supply frequency - a symilar asynchronous motor may spin at 1700 rpms.
What is the torque speed characteristic?
the ratio of the relative speed of stator magnetic field with the speed of rotor, to the speed of rotor is defined as slip. where as in torque slip characteristic is the graph between the speed of the rotor and the torque experienced on the rotor. in the case of induction motor, the torque decreases with the increase in the rotors speed. while in the case of sychronous motor, its different (you check out, because i just forgot about it!! keep smiling!
Why does a 3 phase motor turn slowly?
An induction motor relies on low-frequency currents induced in the rotor by the difference in speed between the rotor and the rotating magnetic field. At sychronous speed the induced current is zero therefore the torque is also zero.
How fast does a sun sychronous orbit need to go to stay in orbit?
If you wanted to put a device in an orbit that would revolve around the sun in the same length of time the sun itself rotates at its equator, your device would have to orbit the sun in 24.5 days. The 'period' of an orbiting body depends only on its distance from the central body. The closer to the sun a planet is, the shorter its 'year' is. Mercury, the closest planet to the sun, completes one orbital revolution every 88 Earth days. In order to complete an orbital revolution every 24.5 days, your device would need to be in an orbit that's only about 43% the size of Mercury's orbit. It would travel in that orbit at the blazing speed of a little over 73 kilometers per second !
What three forces drive a roller coaster?
A 3 wheel locking system, it works by one wheel on top of the rail, one wheel on the side, this wheel helps it go around curves, and 1 wheel on the bottom of the rail, these are called up-stop wheels that prevent the roller coaster from flying off the tracks. This 3 wheel locking system sort of hug the rails to lock the roller coaster train to the rails.
How does digital clock work?
A digital clock works "electronically" using electricity and digital circuitry. This sets aside the clock that simply has a "digital display" wherein the numbers representing the time are moved by some mechanism, but the clock does not have a "digital" time base. Let's look a bit more closely. The "heart" of any clock is the mechanism that provides a time base. It can be mechanical, like it was with the first clocks (and many current one), or it can be electrical. With some electrical clocks, the time base is delivered by the AC power source. The frequency of the AC power grid is generally stable over a long period, and a sychronous electric motor that "syncs" with a "good" line voltage will maitain its accuracy over a period of years. But the newest clocks are often digital. In a digital clock, a digital circuit provides the time base. Some kind of crystal is specifically cut to vibrate at a fixed rate (and with a high degree of accuracy). The vibration of the crystal is electronically monitored, and is maitained by a small voltage that is fed back to the crystal from associated circuits. What comes out of this oscillator is a time base that can be counted and divided down by other electronic components to deliver a "tick" that the display keeps track of. Some of the newer clocks do all of the electronic "stuff" described, but also have a radio receiver that locks on to a NIST (National Instutute of Science and Technology) time signel. (NIST used to be the National Bureau of Standards, NBS.) NIST broadcasts a "time tick" on a number of different frequencies, and their atomic clocks are among the most accurate in the world. The new "atomic clocks" we can purchase are digital clocks that have receivers that lock on to and sync up with the NIST time signals to maintain accuracy.
What is the difference between synchronous and asynchronous data transmission?
Both of these forms of communication are a means of transmitting data. The difference is in the format that the data is transmitted. Asynchronous communications is the method of communications most widely used for PC communication and is commonly used for e-mail applications, Internet access, and asynchronous PC-to-PC communications. Through asynchronous communications, data is transmitted one byte at a time with each byte containing one start bit, eight data bits, and one stop bit, thus yielding a total of ten bits. With asynchronous communications, there is a high amount of overhead because every byte sent contains two extra bits (the start and stop bits) and therefore a substantial loss of performance. Synchronous communications is the more efficient method of communications. CQ's connectivity solutions communicate through the synchronous method of communications. Through synchronous communications, data is transmitted as frames of large data blocks rather than bulky individual bytes. One advantage of synchronous is that control information is easily inserted at the beginning and end of each block to ensure constant timing, or synchronization. Another advantage of synchronous is that it is more efficient than asynchronous. For example, a 56 Kbps dial-up synchronous line can carry 7000 bytes per second (56000/8) compared to a 56 Kbps dial-up asynchronous line which can only carry 5600 bytes per second (56000/10). When transmitting large amounts of information, this translates into a significant increase in speed and performance. To see this work you can work out the efficiency rates and time that it takes to send each message Asynchronous would be worked out as follows To get the efficiency of it you get assuming the message is being send over a 100mb line and 70 bytes to send and 300 characters then it is 70*8 = 560 (the 8 is for the 8 bits to make up each byte) the 70*2 (the start and stop bit) =140 = 700 then to get 560*100/700= 80 that means that 80% efficient To get the time Asynchronous 300 *(1+7+1+1) =3000 take this and divide it by the size of the line in this case 100mb so that is then 3000/100=30 that means that it would take 30 seconds to send for synchronous efficiency Then 70*8= 560 then 4 bytes = 4*8 (the over head bits) = 32 560+32=592 560*100/592=94.5 then that's 94.5% efficient and for the time then it is just 300+4*8=2342/100=23.42 that's then 23.42 seconds this shows you which is faster and more efficient in each case
Is the yin yang Japanese?
No, the "yin yang" is Chinese in Japan it is called "in yo" " The situation is not nearly as simple as it may sound. It's convoluted in the extreme, but I shall do my best insofar as my knowledge. First and foremost, a minor pet peeve of mine; "dragons" and 'long'(Chinese) or 'ryu' (Japan), are not a huge conglomerative lump, regardless of popular regard. Though they sometimes are used to represent some similar Elemental forces (and even this comparison differs widely upon closer examination), they are not the same creature unless you want to say that they are both mythological beings--and one would not attempt I would hope to confuse a Wyvern with a Satyr, or tell one that they are the same thing, if you catch my meaning. 'Western' dragons are by and large potrayed as at least appearing to be almost wholly reptilian, very much in the way that most people have become familiar with them through common fantasy fiction. 'long/ryu' have much more varied appearances and qualities--they can be avian, picine, mammalian, and indeterminate variants between the three. The "Eastern" part of the world that actually claims. most commonly, descent from "long" is actually several of the regional rulers (or Emperors) of ancient China (From which the 'Long' of the Seas are mythologically derived, amongst other things.) As I understand it, Vietnamese mythology also makes a large claim to descent from dragons, but I am much less familiar with that mythos than that of China or Japan. The descent of the Japanese imperial family from 'long'-like beings is convoluted but there is some evidence to support it, at least in an artistic and syncretic sense. The prototypical creator and creatrix of the Ni Hon Go (Rising Sun Land) are Izanami (F) and Izanagi (M). As many of the more 'modern' Japanese beliefs and images are heavily influenced by or derived from Chinese mythology (Shinto basically being a huge multileveled syncretization between Old Religious Taoism and the Aboriginal Ancestor-Worship practices of the original inhabitants of the Island chain, the Ainu--told you it got complicated), many of the older images of Izanami and Izanagi syncretize them with the ancient Chinese images of the progenitors of the universe- Pan Ku (M) and Nu Wa (F)--both of whom were originally portrayed as "Naga"-like beings--that is, serpentine and/or draconian from the waist down. The concept and imagery of the "Naga" comes from the Hindu-Vedic traditions, which has spawned much of the Taoist pantheon and imagery. (Kuan Yin is in fact a female 'aspect' or derivation of the Hindu diety Avalokitesvara [1]--in Japan, she's Kannon, and it pretty much continues in that vein on many fronts.) In the Vedic traditon, there is little to no distinction made between "Naga" and "Dragon/Long", and the words are frequently used interchangeably. In fact, many scholars have postulated that the "Dragon Kings Of The Sea" of China are actually descended from the Vedic mythology of the Naga Kings, and there's a large amount of evidence to support that. (That chunk of mythos, as well as much of that which now supports the belief structure of Feng Shui, appears to have first started appearing in Japan around the Jomon period, but it may well have been earlier, it's hard to say.) What does this all have to do with Amaterasu and Co.? Well, if one postulates that Izanami and Izanagi are derivations of Pan Ku and Nu Wa (which seems likely as much of Japanese mythology is derived similarly) then Izanami and Izanagi would indeed be considered to be of 'draconian' descent, and hence so would their children, among them Amaterasu (From which the Imperial line claims their descent) and Susano (who interestingly enough has many 'draconian' and 'serpentine' associations himself.) The fact that other associations began to be made with Amaterasu later on (most commonly the Phoenix presently due to the fire association, and interestingly enough also derivative of Chinese mythology in which 'dragon' and 'phoenix' represent both opposing and sychronous forces--'yin' and 'yang' if you will, or 'in' and 'yo' in Japanese) would be a fairly recent (at least in terms of mythology and legends) development, and not wholly representative of the original symbology. Additionally, though the Japanese people as a whole may not claim 'descent' from dragons, many of the original 'uji' (clans) of Japan (notably pre "Kojiki" and "Nihongi", both of which are frequently-mangled aggregations of older myths and legends that were highly politicised by the Yamato clan to support their rule) considered many different 'supernatural beings' to be their ancestors, before Shinto as it is commonly percieved today, and multiple individual 'uji' ritual beliefs and practices were aggregated into what it is now. If you look back far enough this information can be found.
What does a digital clock crystal do?
An alarm clock works by specifying a specific time for an alarm to sound, at which time it is electrically or electronically activated. It is crucial that the clock is set to the correct time.
