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tan (phi)= (V* sin (theta) + Ia*Xs)/(V*cos (theta) +Ia*ra)
theta is power factor angle
torque angle= phi-theta
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Difference between synchronous generator and synchronous motor?
ASYNCHRONOUS is a mode whereby events happens irregardless of control. SYNCHRONOUS are this same events but controlled by a timing and/or control
Why you not usually use induction generator?
we do not use induction generator because it require an external source (synchronous generator) that provide reactive power to it.
Applications of synchronous motor?
It is used in variety of applications such as... · Machine Tools such as a ball mill · Motor generator sets · Synchronous clocks · Timing devices · Synchronous condensers to condition electrical power · Record players · Robotics
Which motor rotate above synchronous speed?
An induction motor rotating at higher than synchronous speed would be generating power, thus would be a generator. No motor operating as a motor runs above synchronous speed.
What is the characteristics for a generator on a full load?
What characteristics are you looking for? At full load, a synchronous generator will be spinning at synchronous speed, providing real power (watts), and likely some reactive power (vars), or it may be taking reactive power from the system to help hold the system voltage down under light loading conditions.
What is load angle?
In synchronous system while generator generates rated power and load increase in system, Than frequency start goes to down respectively same as rpm of the all generator start reduce but the speed of the rotating magnetic field is same, So the angle created between rotating magnetic field and generator rotor, This angle are known as load angle of generator. (In isolated system there is same as synchronous system, Load angle very sharply increase in isolated system than synchronous system cause in the isolated system the access load share only by the particular machine while in the synchronous system there is share with all connected machine, which is very small other than) CHIRAG PANCHASARA
Difference between synchronous generator and synchronous motor?
ASYNCHRONOUS is a mode whereby events happens irregardless of control. SYNCHRONOUS are this same events but controlled by a timing and/or control
Why you not usually use induction generator?
we do not use induction generator because it require an external source (synchronous generator) that provide reactive power to it.
What is a syncronous condenser?
A synchronous condenser is physically an electric generator/motor without a mechanical power source. Electrically a synchronous condenser changes the timing between rise and fall of current compared to voltage (phase angle). They also use stored energy to smooth small power fluctuations.
What is the governor of a synchronous generator?
The governor of the synchronous generator is the device that controls the torque of the rotor, and thus the frequency of the generated alternating current. This is important if the power plant is directly coupled to a transmission system.
Why is speed not normally used to control the armature voltage of a synchronous alternator?
Because if speed was used, the power system frequency would be changed. A synchronous generator spins at synchronous speeds. Synchronous generators 101: A typical synchronous generator will have a field winding (typically on the rotor, or rotating part) and a stator winding (the stationary part where power is supplied to the power grid). Current is injected into the field winding, turning it into an electromagnet. This field current is controlled by the Automatic Voltage Regulator (AVR). The more current supplied to the field winding, the stronger the electromagnet becomes, and the more power is required from the prime mover (whatever is supplying the power - steam turbine, for example) to keep the generator spinning at synchronous speeds.
What is the physical meaning of power angle in a power system?
a curve drawn for power against load angle maximum power occurs at load angle of 900 maximum power will be transffered from sending end to receiving end when the reactance is 1.732 times its reactance
Applications of synchronous motor?
It is used in variety of applications such as... · Machine Tools such as a ball mill · Motor generator sets · Synchronous clocks · Timing devices · Synchronous condensers to condition electrical power · Record players · Robotics
Which motor rotate above synchronous speed?
An induction motor rotating at higher than synchronous speed would be generating power, thus would be a generator. No motor operating as a motor runs above synchronous speed.
What is the characteristics for a generator on a full load?
What characteristics are you looking for? At full load, a synchronous generator will be spinning at synchronous speed, providing real power (watts), and likely some reactive power (vars), or it may be taking reactive power from the system to help hold the system voltage down under light loading conditions.
How do you calculate power use for a home power generator?
Click the link. There you can figure the size generator you need.
The power angle of a synchronous motor is affected by what two things?
the excitation voltage applied the power input to the prime mover
