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Excitation of synchronous machines refers to the process of supplying direct current (DC) to the rotor winding to create a magnetic field, which is essential for the operation of the machine. This magnetic field interacts with the rotating magnetic field produced by the stator, enabling the machine to generate or synchronize with the grid frequency. Proper excitation is crucial for maintaining voltage levels and ensuring stable operation under varying load conditions. Inadequate or excessive excitation can lead to issues such as voltage instability or oscillations.
What else can I help you with?
Why do you give DC excitation to AC Synchronous motor?
If the synchronous motor is running near synchronous speed, it will begin rotating at synchronous speed when DC is applied to the rotor. Source: Electrical Machines, Drives, and Power Systems Theodore Wildi Section 17.3
Which excitation synchronous motor drawn reactive power?
Hi, Under excitation - inductive reactive power Over excitation - Capacitive reactive power.
What is over excitation of field windings?
Over-excitation of field windings refers to a condition in synchronous machines, such as generators, where the field current exceeds the rated value, leading to an excessive magnetic field. This can result in increased voltage output and potential overheating of the machine. Prolonged over-excitation can damage the windings and other components due to overheating and insulation breakdown. It is critical to monitor and control the excitation levels to maintain safe and efficient operation.
What is self-independent excitation?
Self-independent excitation refers to a method of generating electrical power in synchronous machines where the excitation system operates independently of the machine's output. In this setup, an external source, often a separate generator or battery, provides the necessary excitation current to the rotor. This approach allows for greater control over the excitation process and can enhance machine stability and performance, particularly in varying load conditions. It is commonly used in power systems to ensure reliable operation and improve voltage regulation.
The power angle of a synchronous motor is affected by what two things?
the excitation voltage applied the power input to the prime mover
Why do you give DC excitation to AC Synchronous motor?
If the synchronous motor is running near synchronous speed, it will begin rotating at synchronous speed when DC is applied to the rotor. Source: Electrical Machines, Drives, and Power Systems Theodore Wildi Section 17.3
Is reluctance motor is a synchronous motor with dc excitation?
yes
Which excitation synchronous motor drawn reactive power?
Hi, Under excitation - inductive reactive power Over excitation - Capacitive reactive power.
What is under excitation in synchronous motor?
DONT KNOW AN OF THEM 10/4 over & out
What will happen if excitation of a running synchronous motor suddenly cuts off?
something cool
Why single phase synchronous machines are not there?
Not where(?)
What is over excitation of field windings?
Over-excitation of field windings refers to a condition in synchronous machines, such as generators, where the field current exceeds the rated value, leading to an excessive magnetic field. This can result in increased voltage output and potential overheating of the machine. Prolonged over-excitation can damage the windings and other components due to overheating and insulation breakdown. It is critical to monitor and control the excitation levels to maintain safe and efficient operation.
What is synchronous impedance?
Synchronous impedance is also known as the EMF method. It is a ratio of open circuits to short circuits, when they both are referred to the same field excitation.
What is meant by static excitation?
Static excitation refers to a method of supplying direct current (DC) to the rotor windings of a synchronous machine, such as a generator, to establish a magnetic field. This excitation is "static" because it typically involves the use of a stationary power source, like a rectifier, to convert AC voltage from the generator into DC. The static excitation system allows for precise control of the machine's output voltage and reactive power, enhancing stability and performance. It contrasts with dynamic excitation systems, which use rotating equipment to provide excitation.
What is the formula for excitation voltage?
E=Vt + Ia jXS Where E excitation voltage Vt Terminal voltage Stator Current Ia Xs synchronous Reactance
What is self-independent excitation?
Self-independent excitation refers to a method of generating electrical power in synchronous machines where the excitation system operates independently of the machine's output. In this setup, an external source, often a separate generator or battery, provides the necessary excitation current to the rotor. This approach allows for greater control over the excitation process and can enhance machine stability and performance, particularly in varying load conditions. It is commonly used in power systems to ensure reliable operation and improve voltage regulation.
In synchronous motor theory is excitation current the same as field current?
Yes, in synchronous motor theory, excitation current is the same as field current. This current is used to produce the magnetic field in the rotor that interacts with the stator current to generate torque and make the motor operate synchronously.
