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The permanent magnet generator is a synchronous machine where the rotor windings has been replaced with permanent magnets. This eliminates the excitation loses in the rotor, which otherwise typically represent 20-30% of the total generator loses. The reduced losses also give a lower temperature rise in the generator, which means that a smaller and simpler cooling system can be used.
The temperature reduction in the rotor also reduces the temperature in the bearings, improving reliability by increasing the lifetime of the bearing and bearing grease.
What else can I help you with?
What is the important of winding element in a generator?
magnetic wire
Explain why armature reaction tends to reduce the total flux in a generator?
Armature reaction in a generator occurs when the magnetic field produced by the armature current interacts with the main magnetic field. This interaction can distort the main magnetic field and create a secondary magnetic field that opposes the original field. As a result, the total flux in the generator is reduced, leading to decreased output voltage and efficiency. Essentially, the armature's magnetic field weakens the effective flux that contributes to the generator's operation.
Generator excitation voltage?
the voltage which is given for creating magnetic field in a generator is known as excitation voltage.
Why a given generator frequency is dictated by the size of the magnetic flux?
A generator's frequency is dictated by the power system frequency, and the number of poles in the generator. For 60 Hz power and a generator designed with two poles, the generator must turn at 3600RMPs (60 Hz * 60 seconds / minute). The magnetic flux is what induces the current in on the output winding. Spinning a synchronous generator faster or slower is not done to control the magnetic flux. The field winding voltage is varied to control this, and in turn control the output of the generator.
How does an electric generator work?
Converts mechanical energy into electricity. Movement of magnetic field across a conductor will cause electron flow. The windings of a generator are rotated within a magnetic field.
How does a generator exciter work?
Exciter controls the magnetic field in the generator system and controls the output voltage and/or current.
How does the starting of synchronous motor using dc generator as a load work-?
Starting of the synchronous motor using the DC generator creates a magnetic field.
What is the relationship between the speed of a generator and its voltage and the torque on the generator shaft and the current produced by the generator?
emf produced by generator(E)=no. of turns in coil*rate of change of magnetic flux
What is the working principle of a Synchronous Generator?
synchronous generator is similar to the principle of laws of electro magnetic induction that is "whenever the magnetic flux linking in a conductor that time emf is induced at the ends of the conductor "
What are the scientific uses of a magnetic generator?
The scientific uses of a magnetic generator are to create power and energy. That power can be used to supply homes or businesses all over the world. It is a green source of power.
How does a generator produce electric current?
A generator moves a coil of wire through a magnetic field and that induces a current in the coil .
Does a generator produce electric current?
A generator moves a coil of wire through a magnetic field and that induces a current in the coil .
