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What is the effect of a increasing the excitation current?
Increasing the excitation current in an electrical machine, such as a generator or motor, typically raises the magnetic field strength. This can lead to an increase in output voltage for generators or enhance the torque and performance in motors. However, excessive excitation can cause saturation of the magnetic core, leading to diminished returns and potential overheating. Proper management of excitation current is essential for optimal machine performance and longevity.
What is the formula for calculating working pressure?
my question is what is the formula for pressure?
Where does the voltage that is necessary for field excitation on the rotor originates from?
The excitation current is provided by a small self-excited pilot generator, attached to the same shaft as the alternator's rotor.
How to test Excitation Current of a transformer?
To test the excitation current of a transformer, you can perform an open-circuit test, where the primary winding is connected to the rated voltage while the secondary winding is left open. Measure the current flowing through the primary winding using an ammeter; this current is the excitation current. It's essential to ensure the transformer is at the specified voltage and frequency during the test for accurate results. Additionally, record the voltage and power factor for further analysis if needed.
What is the expression for calculating maximum current through the zener diode?
the expression for calculating maximum current through the zener diode is : Izmax=Pzmax / Vz
What is the formula for calculating current in a circuit when given the values of power and resistance, where i p/a?
The formula for calculating current in a circuit when given the values of power and resistance is i p/a.
What is the formula for calculating ratio analysis?
Ratio Analysis = Current Asset / Current Liabilities
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 the formula for calculating the resistance in an electrical circuit?
The formula for calculating resistance in an electrical circuit is R V/I, where R is the resistance, V is the voltage, and I is the current.
What is the formula for calculating the percent of weight loss?
The formula for calculating the percent of weight loss is: (Initial weight - Current weight) / Initial weight x 100.
What is the formula for calculating weight loss percentage?
The formula for calculating weight loss percentage is: (Initial Weight - Current Weight) / Initial Weight x 100.
What is the formula for calculating the full load current of 3kW motor?
The formula you are looking for is I = Watts/ Voltage, I = 3000/voltage.
What is the max voltage formula for calculating the maximum voltage in an electrical circuit?
The formula for calculating the maximum voltage in an electrical circuit is V I R, where V is the voltage, I is the current, and R is the resistance.
What is transformer turns ratio excitation current?
This is the current level needed to energize a transformer to its rated voltageThe clue is in the name! 'Excitation' means to create a magnetic field. So the excitation current is the current drawn from the supply which sets up the magnetic field around the core.
What is the formula of calculating effective current if resistor and voltage is given?
I = E/R or Current = Voltage/Resistance (Ohm's Law)
What components compose the excitation current of transformer how the are modeled in the transformer's equivalent circuit?
Excitation current Io = Iw + Iu
What is the difference between generator over excitation versus under excitation when attached to the grid?
Over Excitation is a condition when the Excitation System is providing too much field current and as a result, the rotor of the generator will over heat. The Excitation System is equipped with an Over Excitation Limiter. This limiter acts to reduce the Excitation Current if this condition exists Underexcitation is a condition when the generator is not getting enough Excitation Current. If the generator does not get enough Excitation Current, it can be un-synchronized with the grid. We call this slipping a pole. If this occurs, the generator can be severely damaged. Kelly Thompson Engineering Lead Siemens Energy Alpharetta GA
