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what are v and inverted v curves of synchronous motor

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Q: What is v curve and inverted v curve of sychronous motor?
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What are v and inverted v curves?

V Curve- Excitation vs Armature currentV curve is the graph showing the relation of armature current as a function of field current in synchronous machines. The purpose of the curve is to show the variation in the magnitude of the armature current as the excitation voltage of the machine is varied.Inverted V Curve- Excitation vs Power FactorThe synchronous motor "V Curves" shown above illustrate the effect of excitation (field amps) on the armature (stator) amps and on system power factor. There are separate "V" Curves for No-Load and Full-Load and sometimes the motor manufacturer publishes curves for 25%, 50%, and 75% load. Note that the Armature Amperage and Power Factor "V" Curves are actually inverted "V's".Assume it is desired to determine the field excitation which will produce unity power factor operation at full motor load. Project across from the unity power factor (100%) operating point on the Y-Axis to the peak of the inverted Power Factor "V" Curve (blue line). From this intersection, project down (red line) from the full-load unity power factor (100%) operating point to determine the required field current on the X-Axis.In this example the required DC field current is shown to be just over 10 amps. Note at unity power factor operation the armature (stator) full-load amps is at the minimum value.Increasing the field amps above the value required for unity power factor operation will cause the machine to run with a leading power factor, while field weakening caused the motor power factor to become lagging. When the motor runs either leading or lagging, the armature (stator) amps increases above the unity power factor value.


Inverted sentence pattern?

In an inverted sentence pattern, the usual word order of a subject-verb-object is changed for emphasis or style. For example, "In the garden sat a lovely butterfly" instead of "A lovely butterfly sat in the garden." This inversion can lead to a more poetic or dramatic effect in writing.


How field current change in 'V and inverted v curves ' of synchronous motor?

In v curves armature current decreases in under excitation and increase in overexcitation as fielcurrent increases and armature current is maximum at unity power factor.The power is maximum when load angle is equal to impedance angle.A linear motor is a essentially a multi phase


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chevron


What does an inverted kite look like?

like a V ok


What is the name of the inverted v over a vowel in French?

It is called a circumflex.


Heraldic ordinary shaped like abroad inverted V?

Chevron?


What logo has a red v with a curve in it?

roncato


What are the examples of V-S inverted pattern?

Backward ran the sentences until reeled the mind.


Who invented the V-twin motorcycle motor and when?

harley Davidson did not invent the V-twin motor,who did?


What type V W motor is T0385218?

There's no such thing as a V W motor T0385218.


Is v linear?

If v (velocity) is constant, then it's straight (linear). If v is changing due to acceleration, then it is a curve (non-linear)