What is torque angle in synchronous generator?
Torque angle δ is the angle between Rotor flux and Stator fluxes, both are rotating at synchronous speed. When the synchronous machine is connected to an infinite bus, its speed and terminal voltage are fixed and unalterable.
What is field current in synchronous generator?
Synchronous machines are AC machines that have a field circuit supplied by an external DC source. In a synchronous generator, a DC current is applied to the rotor winding producing a rotor magnetic field. Field windings are the windings producing the main magnetic field (rotor windings for synchronous machines).
What will be the effect of field current changes on the synchronous motor?
The power of motor will vary only when the torque of the load shaft varied. So the field current has zero effect of speed of rotation of a shaft, as the load connected with shaft of motor is constant so active power provided by the motor will also remain constant.
Why did the current flow to the synchronous machine increase as load on the generator increased?
Founder-industral controls Co. Simply put, when two generators are running in synchronous, the voltages are forced to be equal and increasing the field current will increase the generators load indicated in amps.
Is torque angle and load angle same?
Load angle and torque angle both mean the same. It is the angle between the induced EMF ( E) and terminal volta ge (V), or the angle between the stator and rotor magnetic fields. Both are same.
What is torque angle?
Put into its most simple terms, torque angle replaces a maximum torque value for a fastener with a specific amount of fastener rotation. After setting a low baseline torque, just to make sure the fastener is set, the fastener is rotated a precise amount to set the final position and clamp load.
What is the field current in a generator?
As the rotor windings cut through the rotating field, a current is induced in them. This induced current creates a field that, in turn, cuts through the stator windings to create power output to the load. The induction generator thus draws its excitation from the power system to which it’s connected.
How is torque produced in a synchronous motor?
The torque of a synchronous motor is produced by the phase difference between the rotating magnetic field and the rotor. The torque is low when there is a small phase difference between the rotating rotor and the rotating magnetic field.
When the field of a synchronous motor is under excited the power factor will be?
When the synchronous machine is operating as an under-excited motor, it has a lagging power factor due to a low field current.
How does a synchronous motor behave while in operation?
A synchronous motor is one in which the rotor normally rotates at the same speed as the revolving field in the machine. The principle of operation of a synchronous motor can be understood by considering the stator windings to be connected to a three-phase alternating-current supply.
Why does the current increases when the load increases?
When the loading on the motor is increased, the slip of the motor increase. The rotor induced voltage increase due to increase in the slip. The rotor current increase due to increase in rotor voltage with an increase in the slip. Thus, the motor current increase when motor load increases.
What happens when we increase the load on a synchronous generator?
As the generator is connected with the inductive load its power factor will be lagging. If we increase the amount of the load connected at similar P.F, due to increment in the load the armature current also increases, but its angle ø with the terminal voltage Vø has similar value as before changing.