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Why damper is used?
Dampers are used to regulate the flow of air or gasses in ductwork and chimneys.Without dampers the flow in ducts would only be regulated by the fan speed, the flow in chimneys would be dependent on the developed draft, and neither would be controllable directly.
What is efficient dwell time for import and export cargo terminal?
Dwell time depends upon various factor like custodian handling capacity, customs clearance speed, customs house agents efficiency in clearing customs cargo. quality of documentation and import planning. if all the documents are correct air shipment can be cleared in one day and sea shipment in 2-3 days.Kamal Jaincargomen logistics india private limited9849302009
What are advantages of precast concrete?
1- Very rapid speed of erection 2- Good quality control 3- Entire building can be precast - walls, floors, beams, etc. 1- Very rapid speed of erection 2- Good quality control 3- Entire building can be precast - walls, floors, beams, etc.
How Do you calculate the area of pipe?
Start with the maximum flow speed (metres per second) for your liquid, then mutiply by the area of the pipe in square metres, the result is maximum volume flow rate in cubic metres per second.
What is a wind girt?
A wind girt is a structural member within a wall that provides additional strength to a wall in order to resist the forces on a wall as a result of wind pressure. Wind girts are primarily metal, wood or reinforced concrete and usually match the type of material used for the rest of the structure. Wind girts typically run horizontally between two vertical framing members or columns although wind girts can run vertically. The number of wind girts in a wall vary by the bending strength of the wind girt, the height of the wall, the distance between the vertical structural members, and the maximum speed of the wind that the wall is exposed to. Wind girts are designed to counteract both positive (pushing) pressure (windward side) and negative (sucking) pressure (leeward side) that is exerted on the structure. Wind girts generally provide a fastening point for interior and exterior surface materials.
Why do you control the speed of constant speed dc shunt motor?
no it controls your anus
Which DC motor is constant speed motor?
Dc shunt motor is constant speed motor.Its speed is constant with armature current.This shunt motor is used in paper mills and drilling machines
Is 4 point starter used to start and control the speed of dc shunt motor with armature resistance control?
yes
What is constant speed DC motor?
Dc shunt motor is constant speed motor.Its speed is constant with armature current.This shunt motor is used in paper mills and drilling machines
Does DC motor run at a varying speed?
only shunt dc motors have varaible speed control. compound dc motors do however NT as much, plus they are just a mixture of series and shunt dc motors.
What are industrial applications of DC shunt motors?
Dc shunt motor is a constant flux and constant speed motor . So that it is used in centrifugal pumps ,machine tools ,blowers and fans etc.
why we use variable speed drivers in motor control units?
Variable speed drivers are necessary to be able to have different speed settings in a motor.
What is DC shunt motor?
A shunt DC motor connects the armature and field windings in parallel or shunt with a common D.C. power source. This type of motor has good speed regulation even as the load varies, but does not have the starting torque of a series DC motor
Why is the speed of dc shunt motor practically constant under the normal condition?
The speed of dc shunt motor is practically constant under the normal condition because the field flux is constant.
What will happen to a shunt motor if a shunt field coil opens while the motor is running under light load?
Motor will rotate at very high speed leading to destructionAnswer from Kinindia.com
Is it possible to reduce speed of shunt motor?
For any dc shunt motor the speed is directly proportional to the armature voltage. hence if you vary the armature voltage by any means( using thyristor ) or static converters using conventional method( ward Leonardo system) surely you can increase or decrease the speed of the shunt motor. Manjunatha M
If the speed of the dc shunt motor falls due to loading what will be the effect?
on adding load on a dc shunt motor, the amount of current and torque will increase. but terminal voltage will decrease
