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What type of ac motor will operate at a constant speed from no load to full load?
Wiki User
∙ 14y ago
The Synchronous motors will operate at a constant speed from noload to fullload. Even it is classified as an AC motor, we have to fed the motor both AC and DC supplies. That we have to supply DC to the Field (Normally Rotor) and AC to the Armature (Normally Stator).
Wiki User
∙ 14y ago
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Why dc shunt motor known as constant speed motor?
A shunt motor isn't literally constant-speed; its speed does fall between no load and full load. If you plot a graph of speed against load, you will find that the speed falls by around 10% or so. Compared with other d.c. motors, this fall is considered to be insignificant -hence the term, 'constant speed'.We apply a similar term to transformers, when we describe them as being 'constant voltage' machines. They're not literally 'constant voltage', but their regulation (difference between full-load and no-load voltage), is considered to be insignificant.
Why is motor current draw lower at full speed?
Because full speed is unloaded. As you load the motor, speed decreases, and slip increases, with an accompanying increase in current.
What is the speed of DC series motor at no load?
No load speed is the speed that the motor run when it has no load, i.e., the motor is separated from the engine, that speed is than greater than the rated speed, because the rated speed is the speed whwn the motor are linked to the load and it is the full load.
What are some of the applications of shunt motors?
1. D.C Shunt Motors:It is a constant speed motor.Where the speed is required to remain almost constant from noload to full load.Where the load has to be driven at a number of speeds and any one of which is nearly constant. Industrial use: Lathes Drills Boring mills Shapers Spinning and Weaving machines. 2. D.CSeries motor: It is a variable speed motor.The speed is low at high torque.At light or no load ,the motor speed attains dangerously high speed.The motor has a high starting torque.(elevators,electric traction) Industrial Uses: Electric traction Cranes Elevators Air compressor Vacuum cleaner Hair drier Sewing machine 3. D.C Compound motor: Differential compound motors are rarely used because of its poor torque characteristics. Industrial uses: PressesShears Reciprocating machine.
What is the function of vfd?
It is a variable frequency drive, used to control the speed of a 3-phase motor all the way from stopped to full speed, and anywhere in between. Also called VSD, for variable speed drive, they are used to control pumps, fans, conveyor belt drives, anywhere a motor needs to be controlled to a precise speed other than the normal nameplate full speed, or where the speed needs to change to meet different operating conditions.
Why dc shunt motor known as constant speed motor?
A shunt motor isn't literally constant-speed; its speed does fall between no load and full load. If you plot a graph of speed against load, you will find that the speed falls by around 10% or so. Compared with other d.c. motors, this fall is considered to be insignificant -hence the term, 'constant speed'.We apply a similar term to transformers, when we describe them as being 'constant voltage' machines. They're not literally 'constant voltage', but their regulation (difference between full-load and no-load voltage), is considered to be insignificant.
Why is motor current draw lower at full speed?
Because full speed is unloaded. As you load the motor, speed decreases, and slip increases, with an accompanying increase in current.
What is the importance electric motor?
The main reason is the motor’s variable speed behaviour. When the voltage applied to the armature of a DC motor increases, themotor’s speed increases correspondingly.Another reason is the DC motor can develop full torque from zero up to its base speed. This constant-torque characteristic allows DCmotors to be used on applications such as conveyor belts, elevators, cranes,extrudesand mixers,amongstothers. The full torquefrom zero speed is useful when the application needs to be stopped when fully loaded, and then got moving again
What is the speed of DC series motor at no load?
No load speed is the speed that the motor run when it has no load, i.e., the motor is separated from the engine, that speed is than greater than the rated speed, because the rated speed is the speed whwn the motor are linked to the load and it is the full load.
Can you operate single phase motor from drive?
yes it is possible if you provide full details
How the dc current shunt motor change from no load to full load efficiency?
decrease in starting and running torque and speed is almost constant from no load to full load. it's because the field voltage is consant and current is varied.
What is full load speed?
The "full load speed" is the speed at which a motor has been designed to turn - usually measured in RPM (revolutions per minute) - when it is delivering its full rated output power.
How can pulleys be used to increase the speed of a motor?
I dont think you can increase the speed of the motor but if the motor is driving some piece of rotating equipment (pump etc) the speed of the driven shaft can be increased up to the point where the motor reaches full load current.
What happens if load torque is same at full speed in separately excited dc motor?
Same as what? at maximum speed and torque, the motor delivers maximum power.
What is speed loading?
The "full load speed" is the speed at which a motor has been designed to turn - usually measured in RPM (revolutions per minute) - when it is delivering its full rated output power.
Full load torque of induction motor?
full load torque is the torque which produces rated power at full speed
What is full load?
The "full load speed" is the speed at which a motor has been designed to turn - usually measured in RPM (revolutions per minute) - when it is delivering its full rated output power.
