Table of Contents
- 1 What does V curves of synchronous motors indicate?
- 2 What do you mean by V curve and inverted V curve in synchronous motors?
- 3 What are V curves and inverted V curves of three phase synchronous motor?
- 4 Why V curve shifts upwards as the load increases?
- 5 What are V curves how these curves plotted?
- 6 Why does the V curve shift upwards?
- 7 What is armature in synchronous motor?
- 8 What happens to the V curve when a synchronous motor is loaded?
- 9 What is inverted V-curve of a synchronous motor?
- 10 How to get the power factor curve of synchronous motor?
- 11 What is V-curve of armature current?
What does V curves of synchronous motors indicate?
In power engineering & electrical engineering, V curve is the graph showing the relation of armature current as a function of field current in synchronous machines keeping the load constant.
What do you mean by V curve and inverted V curve in synchronous motors?
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 are the parts of a synchronous motor?
A synchronous motor is generally made up of two parts, a stator the stationary part of the machine that carries the armature winding in which the voltage is generated, and a rotor the rotating part of the machine that produces the main field flux.
What are V curves and inverted V curves of three phase synchronous motor?
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.
Why V curve shifts 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 a generator V curve?
V-curve of Generator is basically a plot of variation of armature current with the change in field current. For a constant power, V-curve can only be obtained for generator connected to infinite bus / grid.
What are V curves how these curves plotted?
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.
Why does the V curve shift upwards?
What are the method of starting synchronous motor?
The different methods used to start a synchronous motor are :
- Using Pony Motors : By using the small pony motors like a small induction motor, we can start the synchronous motor.
- Using Small D.C. Machine :
- Using Damper Winding :
- As a Slip Ring Induction Motor ( Synchronous Induction Motor ) :
What is armature in synchronous motor?
The armature is the winding to which the load is connected. In small generators, the field windings are often on the stator, and the armature windings are on the rotor. A synchronous motor is virtually identical to a synchronous generator. Thus, the armature is the stator and the field is the rotor.
What happens to the V curve when a synchronous motor is loaded?
V curve is a plot of the stator current versus field current for different constant loads. If now, the field current is increased further, the armature current increases and the motor starts operating as a leading power factor. …
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 inverted V-curve of a synchronous motor?
At the same time the power factor vs field current is called inverted V-curve of a synchronous motor. Just you connect, two three-phase wattmeters and an ammeter to the stator winding of the synchronous motor. Also, connect another ammeter to the field input supply.
How to get the power factor curve of synchronous motor?
A family of curves can be obtained by plotting the power factor versus field current at a constant load of synchronous motor. These curves are called Inverted V Curves. Highest Point on each curve denotes unity power factor. Note that field current for unity power factor at full load is greater than field current for unity factor at no load.
What is the meaning of the V curve of a stator?
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-curve of armature current?
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. Just you connect, two three-phase wattmeters and an ammeter to the stator winding of the synchronous motor.