The heating time constant is the time that an induction motor takes to reach it's operational temperature.
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∙ 10y agoon idle, probably 0. KWh = KW x time (hours) . eg. 20KW for 5 hours = 100KWh (edit. ignore this answer i do not know what exactingly a idle motor is)
"Induction" motors imply AC power Most AC motors do not have brushes or commutator If your motor does have brushes, a lot of sparking where the brushes meet the comutator is a good indication that it needs to be cleaned and/or "cutdown". If your motor does not have brushes, then you have more serious trouble. Need more details
The speed of an electric motor is directly proportional to the frequency of supply. The rpm written on the name plate is the maximum operating speed for the motor design. Typically, for a squirrel cage induction motors, the speed is constant by design and this type of motor cannot operate for a long time at speeds below the rated value. It is true that loading affects motor speed to some extend but the electric motor will accelerate to the rated speed. If the loading is within the design parameters of the motor, the electric motor speed will not drop. What typically happens is that if the loading increases, the speed goes down, and the current increases. Because voltage is constant, this result in a high I2R loss in the windings and the motor circuit protection trips on thermal and electrical overload. The formula for electric motor speed is SRPM=(120f)/P. The above is for AC motors. If you are referring to a DC motor, what you have stated is correct. The motor will slow down as load is added. That is why you are not supposed to run many DC motors under no load conditions - they will overspeed.
If you ever had a hamster as a kid, visualize the wheel that it used to exercise on. When the iron portion of the motor's rotor is removed this is the overall shape of the conductors embedded in the rotor. It is in this winding that the current is induced into. This in turn creates a magnetic field in the rotor that locks onto the revolving magnetic field in the stator. As for the terminology, a hamster cage induction motor does not convey the image of a motor that can do any heavy work. Its all about the spin, a squirrel is larger and stronger than a hamster and I guess that is about the largest caged animal that can use a wheel for exercising.Additional CommentAt the time when 'squirrel cage' motors were developed, people kept squirrels (rather than hamsters or gerbils) as pets.
A backward induction is a process of reasoning backwards in time, from the end of a problem, in order to determine a sequence of actions to be taken.
Yes, he did. There is one in the Smithsonian museum. Tesla's AC Induction Motor is one of the 10 greatest discoveries of all time. Another one of the original AC Tesla Induction Motors is on display in the British Science Museum in London.
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it depends on the type and model of dryer and also what type of motor is usedfor induction motor you can calculate the RPMA squirrel cage induction motor is a constant speed device. It cannot operate for any length of time at speeds below those shown on the nameplate without danger of burning out.To Calculate the speed of a induction motor, apply this formula:Srpm = 120 x FPSrpm = synchronous revolutions per minute.120 = constantF = supply frequency (in cycles/sec)P = number of motor winding polesExample: What is the synchronous of a motor having 4 poles connected to a 60 hz power supply?Srpm = 120 x FPSrpm = 120 x 604Srpm = 72004Srpm = 1800 rpmAbbas Khan Yousafzai
A motor runs on because of its inertia which causes it to run down until friction dissipates the kinetic energy of the rotor.
Tesla's AC Induction Motor is one of the 10 greatest discoveries of all time. He had an experimental shop at 89 Liberty Street in New York.
The induction time is a period of time in which the freshly mixed material (paint) is allowed to stand before application
on idle, probably 0. KWh = KW x time (hours) . eg. 20KW for 5 hours = 100KWh (edit. ignore this answer i do not know what exactingly a idle motor is)
With a Kenwood food mixer, one can stir and cook food at the same time. With its advanced Induction Heating technology, cooking and stirring are much more easier.
12 noon
"Induction" motors imply AC power Most AC motors do not have brushes or commutator If your motor does have brushes, a lot of sparking where the brushes meet the comutator is a good indication that it needs to be cleaned and/or "cutdown". If your motor does not have brushes, then you have more serious trouble. Need more details
It is a heating curve. It shows the temperature changes over time as a substance is heated continuously at a constant rate, highlighting phase changes and plateaus in temperature where energy is absorbed to overcome intermolecular forces.
Rotor current is is highest when an induction motor is starting, due to the high slip angle. The Squirrel cage rotor winding heats up and expands. The rotor must be cooled before it can withstand another start. The stator winding heats up also, but typically the rotor is the week link. The rotor cools faster when it is running. Plugging a motor (short run followed by another short run) is the worst. Check with the manufacturer for the proper wait time.