What are the V curves of synchronous motor?
What are the V curves of synchronous motor?
V curve is a plot of the stator current versus field current for different constant loads. The Graph plotted between the armature current Ia and field current If at no load the curve is obtained known as V Curve.
What is V and inverted V curves of synchronous motor?
What is V Curve and inverted v curve? The graphical representation of armature current Ia vs field current If is called V-curve since the final view looks like English letter V. At the same time the power factor vs field current is called inverted V-curve of a synchronous motor.
What does the V curves of synchronous machine represents?
V-curve of a synchronous machine shows its performance in terms of variation of armature current with field current when the load and input voltage to the machine is constant.
Why does the V curve shift upwards as the load increases?
– Each V-curve is plotted for a particular load on shaft. – If load is increased, the plot shifts upwards, as the armature current increases, to supply more active power.
What is the use of V curve and inverted V curve?
Such a characteristic of synchronous motor is commonly called as ‘V’ curve of the motor. The characteristic curve plotted between input power factor and the field current for a constant mechanical load on the motor are of the shape of inverted ‘V’ and are known as inverted ‘V’ curves.
How are V and inverted V curves determined?
These are shown in the Fig: 2.27 (a). As against this, if the power factor (cos ф ) is plotted against field current (If), then the shape of the graph looks like an inverted V. Such curves obtained by plotting p.f. against If, at various load conditions are called Inverted V-curves of synchronous motor.
What is the use of V and inverted V curves?
The Inverted V Curve is a graph showing the relation of power factor as a function of field current.
What are V and inverted V curves sketch them and explain their significance?
If graph of armature current drawn by the motor (Ia) against field current (If) is plotted, then its shape looks like an english alphabet V. Such curves obtained by plotting p.f. against If, at various load conditions are called Inverted V-curves of synchronous motor.
How the synchronous motor is used as a synchronous condenser?
A synchronous condenser is a conventional solution that has been used for decades for regulating reactive power before there were any power electronics compensation systems. A conventional synchronous condenser is an AC synchronous motor that is not attached to any driven equipment.
What is synchronous motor?
A synchronous motor is one in which the rotor normally rotates at the same speed as the revolving field in the machine. The stator is similar to that of an induction machine consisting of a cylindrical iron frame with windings, usually three-phase, located in slots around the inner periphery.
What is the difference between synchronous motor and synchronous condenser?
The only difference between a synchronous motor and a synchronous condenser is the synchronous condenser shaft is not connected to anything—it simply spins unimpeded. The sole purpose of a synchronous condenser is to adjust conditions (power factor) on the electric power transmission grid.