What is load angle?
Load angle is nothing but an angle different between stator axis and rotor pole axis of the synchronous motor. For ideal motor, the load angle is zero since the rotor poles aligned with stator poles, but in practice, this is not possible. It is also called a power angle, torque angle and coupling angle.
How do you calculate load angle?
Mathematically, the length of the sling is divided by the height from the load to the hook. Example: The sling is 10′ long and the height is 5′, divide the length by the height, for a sling angle factor of 2, which is the SAF for a 30-degree horizontal angle.
Under what conditions load angle is maximum?
Maximum excitation power occurs at 90° and maximum power due to reluctance occurs at 45°. Therefore, the maximum power developed in salient pole synchronous machine occurs at load angle less than 90°.
What is critical clearing angle?
The critical clearing angle is defined as the maximum change in the load angle curve before clearing the fault without loss of synchronism. The angle at which the fault becomes clear and the system becomes stable is called critical clearing angle.
What is the load angle of a generator?
Electrical Load Angle (δ) is the angle between the induced EMF and terminal voltage, or the angle between the stator and rotor magnetic fields. For a synchronous generator, the magnetic field rotates at synchronous speed and induces the rotating magnetic field in the stator.
What is power factor angle?
Power factor defines the phase angle between the current and voltage waveforms, were I and V are the magnitudes of rms values of the current and voltage. Note that it does not matter whether the phase angle is the difference of the current with respect to the voltage, or the voltage with respect to the current.
What is good power factor?
The ideal power factor is unity, or one. Anything less than one means that extra power is required to achieve the actual task at hand. All current flow causes losses both in the supply and distribution system. A load with a power factor of 1.0 results in the most efficient loading of the supply.