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If the synchronous motor is single phase then there are two slip rings & if this motor is three phase so the slip rings are three in number.
Correction;
I have never seen a single phase synchronous motor. It would cost more that it was worth.
A synchronous motor has a separately excited field. If the excitation comes from a stationary DC source it has 2 slip (collector) rings.
A brushless induction motor has no slip rings because the exciter armature rotates and so do the rectifiers.
A permanent magnet motor, used with variable frequency drives, is another type of synchronous motor that has no slip rings.
A three phase motor with 3 slip rings is a Wound Rotor motor. Wound rotor motors are variable speed motors that were used for such applications as bridges and cranes before variable speed drives.
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How many types of DC motor?
Types of AC MotorsClassification Based On Principle Of Operation:(a) Synchronous Motors.1. Plain2. Super(b) Asynchronous Motors.1. Induction Motors:(a) Squirrel Cage(b) Slip-Ring (external resistance).2. Commutator Motors:(a) Series(b) Compensated(c) Shunt(d) Repulsion(e) Repulsion-start induction(f) Repulsion induction
How many poles in a six thousand RPM motor?
It depends on the frequency. At 60 Hertz, with an ordinary two pole synchronous motor, you cannot have an RPM that is greater than 1800, so a six thousand RPM motor has to have a different power supply.
How many volts in a dc motor?
A DC motor can be built to operate on any voltage.
How many percent will be the starting current for motor?
Motor starting current is typically 5-7 times the rated current of the motor. (For three phase induction motors)
How many amps are in a twelve volt motor?
That depends entirely upon the type of motor. A car starting motor may take a few hundred Amps for the short period.
Where can you find objective type questions related to Electric Motors?
You can Google it on internet.One such website is http://www.electricalquizzes.com where you can read theory and solve objective type questions related to Electric motor,Synchronous motor,Synchronous generator and many other electrical related topics.
How many types of DC motor?
Types of AC MotorsClassification Based On Principle Of Operation:(a) Synchronous Motors.1. Plain2. Super(b) Asynchronous Motors.1. Induction Motors:(a) Squirrel Cage(b) Slip-Ring (external resistance).2. Commutator Motors:(a) Series(b) Compensated(c) Shunt(d) Repulsion(e) Repulsion-start induction(f) Repulsion induction
How many poles in a six thousand RPM motor?
It depends on the frequency. At 60 Hertz, with an ordinary two pole synchronous motor, you cannot have an RPM that is greater than 1800, so a six thousand RPM motor has to have a different power supply.
Hyundai burning oil?
How many miles are on it? Your piston rings are probably worn out causing oil to slip past and burn in the combustion chamber.
What companies manufacture a commercial grade slip ring?
Companies that manufacture a commercial grade slip ring include Moflon, India Mart, Moog, Thomas Net and many more. These rings are often made of copper or cupro-nickel.
Why the synchronous motor is always a salient pole machine ie why don't we use a cylindrical pole machine as a synchronous motor?
The speed of the machine is tied to the power supply frequency and the number of poles the machine has. It becomes impractical to make a round rotor machine with many poles, so machines that spin at low revolutions will typically be salient designs. A two or four pole machine could be round rotor designs.
When was Many a Slip created?
Many a Slip was created in 1964.
When did Many a Slip end?
Many a Slip ended in 1979.
Where would could you buy a synchronous motor AC12V 5060Hz that is used to turn the color wheel on a fiber optic switch?
There are many online retailers that would sell this type of thing. See the related links for a start.
How many pole must a synchronous motor have to operate at 1800 rpm on a cycle system?
u can take 4 pole. . . Bcoz v cnt take 3 pole, either 2, 4, 6 8, 10
How many types of AC generator are there?
Induction type alternator and synchronous generator.
What is the slipring used for in ac motors?
synchronous motors have a slipring to apply the dc field....Addition...to apply the excitation field to the armature/rotor that establishes the reaction with the rotating field in the stator, causing the rotor to turn the output shaft.Modern motors use a rotating transformer with stationary windings surrounding rotating windings mounted on the rotor shaft, thus eliminating the sliding contacts between the brushes and the sliprings. This improves efficiency and reliability.------- efficiency and reliability ??? ---------doing the transformer thing eliminates the need to check and change the brushes.you will still need to watch the bearings there are usually a couple brushes on the slip rings for redundancy (reliability?)There is no way possible the transformer arrangement will improve efficiencythe best tightly coupled transformers can be about 98% efficientsince this transformer must have a rather large gap so it may rotate it cannot be as closely coupled and will probably be more like 89% efficient.so at best the field with rotating transformer will be 10% less efficient than the slip rings.For a large plant the air compressors >300hp are always synchronous motorsby varying the field you can change the motor load from leading to lagging and as such save the VAR charges the power company generally tags on , easy to do with slip rings maybe not accessible with the package non slip ring motors.this of course requires monitoring the power at the service entrance and access to the exciter(s) on the large motor(s)alternators on cars have slip rings and many have a 2 wire external connection, which means the voltage is regulated on these 2 terminals, loose terminals longer wires perhaps a bad engine mount may mean the alternator will not charge the battery. without a kelvin connection there is no way the alternator can know what voltage the battery has. without a temperature sensor on the battery theres no way for the voltage to be related to the charge state. (less wire is cheaper in the short run but always less efficient)
