Q:My motor is designed for 40deg ambient temp with F class (Amb.40deg+105K Rise+10K Hot spot allowance) insulation. But my customer wants to use it at 50Deg. As per our spec. motor should be de-rated the max. power should be 93% of the rated power. Means customer has to reduce his application's OP torque about 7%. If my customer doesn't accept reduce the app. torque, can I go for H class (Amb.40deg+125K Rise+10K Hot spot allowance) insulation. Will the 20K additional temp. rise cushion compensate the increase of 10deg in Ambient? What will be the winding temp. according to the ambient temp rise about 10Deg (50Deg)C 20Deg C (60deg)? Pls help

by no potential typical this to be authentic. although, did you recognize what variety of motor? The automobiles own inner termperatures might want to exceed 40C and ambient might want to do not have any more something to do with motor operation. 40C is basically 104F...it really is quite some circumstances a common temp contained in the summer season outdoors or in a cupboard. automobiles might want to no longer replace a lot in this manner of ambient. will be quite a few issues in my adventure: a million. issues have a tendency to develop as they warmth up...perchance binding of a few variety? 2. will be that the ambient from the elements affected the source frequency from the capacity plant replacing the motor speed? although no longer certain how. 3. Line voltages feeding the automobiles will be decrease simply by call for contained in the summer season months? Making the motor weaker and accordingly mutually slower even as operating at load? 4. perchance your persons has worked at in reality one position in his life and the a lot would get better because the temperature rose, causing the automobiles to decelerate? 5. it will be that the automobiles get better resistive with better temps, accordingly getting weaker and slowing down. yet having reported that, 104F(40C) isn't all that warm for an AC motor..it is a temperature in Arizona contained in the summer season. there are quite some approaches that a motor can perceptively decelerate throughout the time of severe ambient...yet they don't look to be designed or behave that way commonly. would want to seek for suggestion from consisting of your persons to get a better precise clarification. i think the burden is what differences. yet no...they ought to no longer decelerate.

Q:How to ac motor work?

The motor uses the electricity to make temporary electromagnets. There is a ring of these magnets around the case of the motor, there are some on the rotor, the part that spins. The motor supplies power to one of the magnets around the case also to one of the magnets on the rotor. The two magnets are now attracted to each other, the magnetic power pulls the rotor towards the case magnet. Before it gets to the point that the two magnets are lined-up, it turns the case magnet off switches power to the next case magnet, that is just a bit further away. The magnet on the rotor is now attracted to the next one, the rotor is pulled around a bit further. The motor then switches the power to the magnet that's next around the case, the rotor continues to turn to try get the magnets to line-up. It's a bit more complex then that, but that should give you the general idea.

Q:what is the hp of the largest electric motor.?

NASA okorder /

Q:Winding of single-phase AC motor?

The winding of AC single-phase unidirectional motor is composed of two sets of coils, which can be a plurality of magnetic poles (electromagnets), which can be divided into main or auxiliary parts or can be operated and started, and the two sets of coils can not be connected wrongly. AC single phase bidirectional motor of the two sets of coils, regardless of the main, deputy, or can be composed of a number of magnetic poles (electromagnets). AC three-phase motor three sets of coil parameters are same, magnetic pole number can also be more than one. The connection between the coils of a single phase three-phase motor must be in a certain order, not necessarily in series. The number of poles (electromagnets) varies according to the speed of the motor.

Q:What happens to a stator wound AC permanent magnet motor when the rotor is removed but still powered?

You will have an energised choke in one place and a rotor that is still spinning due to intertia but slowing down due to friction. With no rotor load the power consumption will go down. Probably. In real life the rotor would go out of control as you tried to disassemble the motor while working and it would shatter into little bits.

Q:What is AC induction motor?

Three phase motors must be cut off at the same time when the 3 phase motor is switched off. You can't just cut off 1 or 2 of them. This will burn the motor. Usually, the electrician calls it "eating a single phase"".

Q:Hello, I'm planning a project and I am going to need to control the rotational speed of an electric motor very accurately. Is there an easy way to do this? I was thinking about some sort of comparative op-amp but don't really understand.Also, I need the motor to be able to change speed very quickly, ie accelerate and decelerate to the required angular velocity. Is this quality the torque? Thanks

There are many types of electric motors and the answer will depend on what type you are talking about: DC motor, AC motor, stepping motor, synchronous motor, etc. A DC motor speed is controlled by the voltage applied. To control the speed accurately you would need some sort of sensor that would measure how fast it is going. I suggest that you look into stepping motors if you need to control the speed accurately.

Q:I have a 90v DC electric motor I would like to run with 110v electricity. It was running off 110v when it was inside a wheel balancer. The motor came out of a wheel balancer and I need it for a specialized fan application. What kind of converter do I need to not only run it with 110v, but also make it variable speed? Any suggestions?

If its a universal motor it will run on dc or ac. Check the tag on the motor data plate. Varying the voltage or current with a correct size dimmer will work or us a frequency drive which was probabley used when it was a balancer. The freq drive converts AC to DC for precision movements or speeds.

Q:the pulley isnt seized.it smokes only when ac or defroster is on.i would like to know how long can i drive it with the ac or defroster off all the time.

The A/C compressor pulley runs free until you turn on the A/C knob. The pulley has an electric clutch that starts the compressor guts spinning. So as long as that clutch isn't turned on, it will not damage anything. Just unplug the wire connector on the A/C compressor, and drive. Or just never turn on the A/C switch on the dash.

Q:If an induction motor is rated at 0.5HP and 370W at 220V single phase, is this just at start up or when under operating load. In this instance it's a submersible water pump designed for continuous duty operating on a power curve with a maximum flow rate of 400Litres/min and maximum dynamic head of 14.5 metres. Apart from general interest my main reason is that I want to get some idea of the operating costs of running this pump to supply my pond waterfall on a 24/7/365 basis.

The rated power is the continuous rating. Start up power is understood to be higher, but of course, short lived. The National Electrical Code has information about different types of motors having start up surges of X times the continuous power. I think induction is 2 times, and household split phase motors tend to be 3 times. The half horsepower rating is impossibly amazing in combination with the power rating. It means the motor is 99.19% efficient. Almost certainly the result of multiple roundings. (Note that efficiencies over 95% only occur in very expensive motors, like 200 or more horsepower. See www.energy.wsu.edu/ftp-ep/pubs/en... )