Motors Definition and 325 Threads

can u modify an electric motor so that it uses a motorcycle battery as a power supply?how? and used for a grass trimmer...

I am building a small satellite for my project in which I have to release a mechanism to eject the landing gear at a certain altitude before landing vertically. The landing gear will consist of spring-loaded rods, initially at 90 degree angle with respect to the circular base of diameter 2 inch...

I am trying to implement an electric motor as a generator at the end of a steering wheel shaft. The motor would be used to apply a resistance torque to the shaft. What type of motor would you recommend?

Hello all. I have a question about AC motors that has been driving me crazy. I understand how variable frequency drives work, by adjusting the power frequency and thus changing the rpm of the motor based on the equation: rpm = 120 x f / p where f = frequency (Hz) and p = number of motor...

I've been pondering over this for a while. Is it possible to make a DC motor that does not require a commutater.

A buddy of mine called me with this so I thought that I would throw it out for comments. The problem is that he can hear a local AM radio station coming from at least two motors in his house. If the fridge fan or compressor [not sure which], or the space heater fan motor is running, he can hear...

please help me in cllecting information about High Temperature Superconductor motor. Are they available in the market? how effecient are they? I need to know all their details, properties, design, advanteges. Thanks all

Hi everyone. At the moment I am doing motors and generators in physics, in particular Lenz's Law. I understand most of the stuff, but I am really just stuck on 2 questions. If you could help me, I would really be appreciative (explanations, not just answers preferable). Q1) A flexible metal...

I figured this would have been talked about before, but i couldn't find it in search. http://www.pureenergysystems.com/news/2004/06/30/6900029PerendevPowerMagneticMotor/ I know its not defying any real laws or anything and theyve been around forever, but I am wondering if anyone knows any...

While I've worked with an awful lot of motors, including making simple ones and repairing several others, I don't know the technical aspect of what governs the no-load speed of a DC unit. Specifically, I have 3 really nice 12VDC 1/2hp wheelchair drive motors with gear trains. They're extremely...

I have three questions that I am pretty confused about: 1. A slope rises 15m veritcally for every 40m of its length (in horizontal direction). A car of mass 1.25t travels a distance of 150m up the slope at uniform speed. Find the work done if the frictional resistance is 40N. 2. A...

I'm not sure on what I have to do for this practical. I have to develop a theory and choose certain equipment for me to perform the investigation and obtain results... only i don't know where to start. the aim is: Investigate how the amplitude of a pendulum formed by a magnet and thread...

I have no idea how AC Motors work. Can anyone point me in the way of a basic book or website which explains how they operate :confused: I need to know about them for my new job :blushing:

Wich are more efficent, Dc motors or Ac motors? Say for instance you had 2 motors 24V Dc and a 240V Ac. Wich would be more efficent?

Hi I am new here, apologies in advance if this is in the wrong forum, but since I don't think I believe it - skepticism seemed to be the right place. I ran across several sites claiming to have built prototypes of fuel-less magnetic motors. I am not sure what to make of these claims. Any...

I hope you will indulge me for a rather strange request, but does anyone out there know of any wind-up motors large enough to move a small auto. It doesn't need great capacity, but i am hoping for at least the capability to move the vehicle a mile or so. Thanks, KM

Hi I need Help with an EE problem I have tried doing it like 10 times but i keep on getting the wrong answer can anyone help me here it is Below is the equivalent circuit model for an induction motor. THe resistance on the right (0.1/s) charges with motor speed. S stands for slip where Zero...

Why don't car makers produce cars with diesel engines coupled with electric generator and then use only electric motors for propulsion? You know what I mean? :redface:

May Ask Help ... How I can know if the electrical motor is AC or DC ... In the case if i didn't find any ( Name Plate ) on it ... ? Also Asking If I Can Know ... For Wich Cases We Should Use ( AC ) OR ( DC ) ... Electrical Motors ? I Mean Wich Kind Of Machines ... Because I'm...

Question 1: Why use an iron core armature? I took an old electric motor apart to study it. I noticed the armature has windings around an iron core. Iron is used to concentrate the magnetic flux. But iron is also attracted to the electromagnets used to repell the armature windings! It seems to...

main features of dc motor (input dc) Two permanent magnets on opposite sides of the motor, with opposite poles facing each other. The pole faces are curved to fit around the armature. The armature consists of a cylinder of laminated iron mounted on an axle. Often there are longitudinal...

i hear electrical moters have more power per weight than piston engines. such as, a 100 KG electric motor would make more power than a 100 KG piston engine. what about size, would it be smaller/no differnt/bigger in size? and asuming we had room temp superconductors, the motor would...

Hey guys my teacher asked us to define back EMF in a motor, I am having a bit of touble understanding all of this can anyone explain it a little. Thanks

I just saw a demonstration of an induction motors and was wondering if its possible to build an AC or DC generator without contact brushes? The only way I can think of is if you have a permanant magnet spinning near or within a coil or wire. Is there anyway to produce a magetic field with just...

I uploaded the question i have to answer. I am given a daigram of a simple DC electric motor. I am asked to find which way the coil will spin at certain points I have been using the right hand palm rule where my thumb points in the direction of the current and my fingers in the...