Answer Posted / najib
Ward Leonard method is a very effective method of speed
control that allows the variation of speed both above and
below the base speed.
The speed control below the base speed is obtained by
varying the supply voltage to the armature of the motor.The
point important here is till the base speed the speed
control is constant torque and variable power method.
The speed above the base speed can be obtained by reducing
the flux of the field and it is a constant power and
variable torque method.
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
I am B.E.electrical engineer having 7 years of experience in Transformer testing upto 315 MVA.I want to khow how I can get the 'Electrical Valuer' License.
What are the basic components of the feedback control system?
what can be the causes of capacitor start motor having a higher current that its actual
What is the difference between a verilog task and verilog function?
What is speed mode?
What is difference between safe PLC and normal PLC
does buccholz in a transformer use batteries
WHaT IS THE CONCEPT OF INDUCTION LAMPS IN MODERN LIGHTINGS, and HOW IT WORKS TO EMIT LIGHT ( AS NO ELECTRODES ARE PRESENT ) ?" COULD INDUCTION LAMPS CAUSE INTERFERENCE WITH COMUNICATIONS INTO A STORE USING INDUCTION LIGHTING ? WHAT IS THE BENEFIT OF USING THE LOW FREQENCY INDUCTION LAMP , VERSUS LED , AND VERSUS FLUORESCENT, AND VERSUS ANOTHER KIND OF LIGHTING . THANK yOU MOISES GUINDI
is that any software calculator to calculate the size of cable
how to select energy meter? have any calculation?
Does magnetomonopoles exists? one maxwell equation strongly suggests no, but how about their existance in plasma?
(1)WHAT HAPPENS WHEN SUDDENLY LOAD GIVEN TO THE INDUCTION MOTOR ? (2)CAN WE MAKE WOOD AS MAGNET ? (3)WHAT IS THE VALUE OF MAGNETIC FLUX DENSITY IN TRANSFORMER ? (4)WHY WE ARE USING ELECTROMAGNETI NOT ELECTROSTATIC IN MACHINE ?
why the check zone and main zone are used for Busbar Protn. scheem?
What are the main parts of central chiller plant? Explain the function of each stage.
What is the function of attenuator in cro?
