Motors Definition and 325 Threads

Hi, I am doing a project of making an electric car while using two DC Hub motors of 36V (750W power) each, one on each rare wheel. I intend to use a single Lithium ion battery of 48V and 32 Amph to operate both the hub motors. Please tell me 'can a 48V & 32Amp Battery operate Two Hub...

Been trying to find an answer to this all day. Would really appreciate any help! Assuming the electric motors are perfectly synced-up, would using multiple motors effectively split the inertia loads evenly among the 2/3/4 motors? Correct me if I'm wrong, but with the equation 1/2Mr^2 for...

Hello, I'd like to ask if anyone could give me information or a link to web page where I can find some for the most advanced high speed electric motors used today in cutting machines - speed range, torque and etc. I tried to find searching in Google but I haven't found anything. If someone...

1. Small electric motors with only one armature loop sometimes get stuck. They can be started again by giving the armature a small twist. Looking at the diagram below, what might be the explanation for the motor not being able to start on its own? When the brush(es) reaches the split within...

I am trying to mount rubber wheels on a motor to make a paper airplane launcher similar to this: http://www.instructables.com/id/Super-fast-paper-plane-launcher/ only, instead of wheels, I'm using rubber stoppers (for flasks) I've got two questions, 1) how do I attach them to the motor...

Hey guys, I got this problem. I have 9 fans motors in which i need to send a range of dc signal of 0-10 volts to each one. I had decided to buy a simple signal generator that can do the trick but soon realized that having one signal generator hook up to 9 motors at the same time will not be...

I was wondering if there is anyway to get more wattage out of a 1000 watt motor?

Hi everyone, I am really trying to get the concept of Servo Motors and am sort of stuck on something, particularly how the motor gets its Pulse Width Modulation. I understand the 0 to 5V with a period of about 20ms and different pulse widths generate different angular positions. What I am...

Hi, I use brushless DC motors for my hobby things (planes, cars, helicopters). These motors have a special ESC which outputs a 3-phase AC current to the motor. These motors have stationary coils, and a rotary magnet array. The motors have an incredible torque for the size. I have, however...

So I've been trying to make an electric bike. I've read that to overcome steeper hills you need higher amperage, but in looking for motors I found a 1000 watt 48 volt motor that is rated for 28 amps and a 600 watt 24 volt motor rated for 32 amps. Which motor creates more torque? If anyone...

hi all i came here just to get a little advice. i am building a custom lift for the back of my work van. i need to lift up my tool box (which is quite heavy {about 125 lbs}) 3-5 times a day. putting it in and out is a pain. anyway i was wondering which electric motor i should use or what the...

Hi, If I powered a permanent magnet generator like one found in a wind turbine, with let's say with a 1/2 hp A/C motor for example and directly coupled them together or used a gear reducer to increase the torque and rpm's, would the output watts created by the generator be greater than the...

Dear All I want to design a Full motion Antenna. But I want to start from the scratch. Suppose I have a 1m parabolic Antenna and I want to install two motors (Elevation and Azimuth) The motors should be DC. And I want to know how to calculate all the parameters required to move the...

Homework Statement How do motors work? Is what I have right so far? The attempt at a solution Generators: I understand that a coil moves and it cuts across the magnetic flux lines in a magnetic field, emf is induced. So mechanical energy (coil moving) changes into current from the emf...

The textbooks say that motors and generators are the same structurally, they just differ in what is input (motion / voltage) and what is output (voltage / motion). I have also read that electric trains use this phenomenon for their 'electric braking', by running their motors as generators by...

Hi All, Can anyone care to explain what are 2 pole 4 pole 6 pole 8 pole motors? What are the Asian Countries specfically use for them?

Homework Statement A dc series motor takes a full load current of 10 A from a 12 V voltage source .The iron,friction and windage losses account to 9% of the input power .the field winding resistance is 0.1 ohms and the armature resistance is 0.15 ohms and the voltage drop is 2 V .Calculate the...

i am wondering why in some problem they are regarding back emf of a motor as a constant value that characterizes the motor although current is sometimes variable? i guess the reason is for simplifying the problem, what do u think? can this occur in reality? thanks for helping.

Just a short question. As part of a dyno project, I am coupling two dc motors together with a timing belt. To allow the same rig to be used for different test motors, I am considering mounting this (test) motor on a table, which can be positioned in two directions on leadscrews. This would...

hey guys... i have 6 motors at work, 380V, 50Hz, 200 HP. the terminals are labeled 1,2,3,7,8 and 9. continuity test showed that 1,2,3 are connected together, and 7,8,9 are connected together. how is that possible ?? am i missing something ?? note that that is the case in all 6 motors. thx

1-this is what is written in my book: E= Ir+E' where E' is the back emf, r and E' are constants P(mechanical)=E'*I an electrical motor functions only if the generator connected across its terminals delivers a positive potential difference that exceeds its back emf. So my question is, why are...

After reading about a guy who used a permanent magnet dc motor for his wind turbine, I got confused. Can motors be used as alternators?

Hi, I am not sure if this new motor/device as shown in carvenmotors.com could work and I would like to know a engineer's piont of view It seems to be a piston but with less parts... do you think it really works? Have you seen any operative? in which aplication? Thanks!

So I was reading about asynchronous motors, and it seems the motor works better when the resistance of the rotor is smaller. This is fairly obvious, because the smaller the resistance, the bigger the inductive currents and therefore more mechanical force is applied on the rotor, thus its doing...

I am seeking help for a design solution to run wiring through a rotating shaft spun by a motor. Imagine a display mounted on the end of a ceiling fan blade - The signal and power for the display would need to come through the motor (from the within the ceiling) while the entire blade assembly is...

I know you all probably hate this sort of general question, but I'm kind of on a tight schedule so it can't hurt to ask. I am working on creating a prototype for a project which will require a rotating circular stand for an adult person to stand on which will then be capable of rotating at low...

Hi, new to the whole electrical side of things, have never been good with voltages, currents or resistance etc. So I apologise for any simple questions. So if I have two 12v motors, does this mean I have to include two 12v (or one 24v) supplies? Or somehow does a 12v supply power both of them...

Just curious how electric motors work, specifically DC motors. I have some questions i would like to understand better. do the windings of a motor determine the required voltage to power it? Can a 110 volt ac motor be powered by a 12 volt dc battery without an inverter? Can a 110 volt...

A normal servo motor gives a highly accurate response to an input, with the output being an angular position of the shaft. For example, give it a 2ms pulse and it might go to +63 degrees. I am wondering what sort of motor (or system) is used to control an amount of force or pressure. For...

Hi sir, I am new about to this site.Actually I am an embedded engineer. Right now I am working on :smile:Pick and place robot.I want to control dc motors. I don't have any datasheet of DC motor.But I want to know how to calculate dc motors parameters required for the moments of robot.Right...

I understand there are different types of induction motors. We use single phase 2 pole and 4 pole cap run motors which have a pretty good balance between forward and reverse torque. We are able to get motors where they adjust the coils to get the forward and reverse toque to be different, up...

Hi there, I have recently been working on a project that involves building a mechanical dolly that is driven by 2 electrical motors. I have decided to use 2 electrical winch motors which each have a rating of 5700kg and a drum size of diameter 64mm My question is, how do I calculate...

I'm working on choosing an appropriate motor. I have the calculations I need for the required torque, power, max velocity, force, and acceleration. Now I need to know the maximum velocity that a specific motor can move 159 kg 0.45 m across a horizontal plane. In all of my calculations for...

Ey guys sorry if this is in the wrong area; not too sure but i do mechanical eng and figured it was. Well i hope so lol otherwise i might have selected the wrong course We have an assignment coming up, (according to past year students that involves DC motors, gear box's). Wouldn’t mind...

Hello. I want to work with Photovoltaics and with the renewable industry. Electric motors, boats, cars. Is EE a good choice? I was thinking first in ME but looks like you see more of solar energy in EE. Please i need urgent advice i only left like 2 moths to make a choice.

Good Day, I have defective Aluminium windings motor. As you know Aluminium is very difficult to winding. So, I want to use Copper wire to re-winding the motor. How can I do that? What size should I use and what will be the number of turns? Someone told me that you can use...

I am an electrician, and I recently got into some trouble on an issue. We were trouble shooting a fan motor that was rated at 240v and was only getting 208v. The more experienced electricians I was with said the amperage was going up because there wasn't enough voltage. This makes no sense to...

I wonder where I work, 3-phase ind. motor with 80 ohms resistance per phase from the manufacturer was re winded and the new resistance per phase was 89 / 90 / 94 Ohms in the 3 phases. when the motor was put back, it burnt within few hour, why was this?

I am wondering if high strength electric discharges can in effect produce magnetic fields that can alter the magnetic ordering of particles in copper, which is otherwise a diamagnetic material. All atoms do possesses subatomic particles with magnetic moments, do they not? Could these not be...

Hi,I am new here^^17 years old... I got a little problem with understanding how simple alternating currents motors/AC Motors work... Anyone has a good Table or Figure?? Magnetic problems: 1)Whats the difference between inducing current and normal electric current?? 2)Whats the meaning...

Homework Statement Derive from Newton II the thrust (the force produced by the rocket exhaust) achieved by a rocket motor which ejects material with constant velocity u and mass ejection rate a. Homework Equations The Attempt at a Solution Not sure...I know how to derive vf =...

hi all look i haven't finished the control I subject ..and the Dr ask us for a project. i've got an idea i want to design and satlight with two motor if anyone can help me with the basic i would be greatfull if there any site can explain that ..please i need it

Simple question. I've been reading qualitatively about the torque and power curve of electric engines versus internal combustion engines. I'm led to understand that electric engines get much higher torques even at lower speed. One argument for why electric cars are inherently more efficient than...

find HP of electrical Motors Required Dear guys, As you see in picture, there is a two rolls. Top roll have a Rubber Surface Coating (Weight : 1000kg, OD:550mm, ID: 448mm, Face Length : 1950mm), Bottom roll (Weight : 1500 kg, OD:605mm, ID: 535mm , Face Length : 1950mm ) is a steel surface...

why motors can convert energy?? why motors can convert energy when you'll only just spin it??

I know this can't be done, else everyone would be doing it, this question is more of a "why can't it be done? and what are the difficulties that make this impossible?" rather than a "Why is no one doing it?". We have a motor, naturally we would connect it to our mains and draw power, the...

I was reading about induction motors and speed controller(self commutated inverters for cage motor), and i didn't understand this sentence:"The induction motor can either absorb or deliver reactive power". Thanks for any help.

how dc shunt motors are different from the simple dc motors and is there any relation between between generators

Hello Everybody I heard about unlimited and free energy from magnet motors like perendev magnetic motor I believe that it work , Do I think true? I think perendev magnetic motor specification is: good Torque cheap GREEN Energy Easy to build My question is : " Why we don't use Magnet...

What would happen if you were two create something like in the photo. Lets just say that the magnets on the right are on the axle that's connected with motor. While the other magnets to right are on an axle. Would the magnets on the motor drive the other one?