Dc motor Definition and 314 Threads

If I wanted to create a hand crank to spin this dc motor... I want to create a handcrank to spin a DC motor at 24000 rpm. The DC motor is an 18V hobby motor from radioshack. Is this possible?

i would like to design a solar assisted driving mechanism for my bicycle? What is the compatible battery specifications to power 24v 1hp dc motor and the necessary solar panel specification to charge the battery? I'm kinda clueless in this so any help would be deeply appreciated. Thanks

I want to use a 12V DC Brushless permanent magnet motor as a wind powered electrical generator for a project. The motor is rated DC 12V and 1.20 amps. Once I reach an output of 12V does that means that I also have 1.2 Amps? Thank you.

Homework Statement I want to ask how dc motor and ac generator work and how they are used. dc motor is a device that converts electrical energy into mechanical energy. dc motor consists of magnet, coil, split ring commutator, brush and dc supply. dc supply will give direct current to the...

Fellow Engineering Lovers, Being a mechanical with limited electrical I must turn to the electron masters for answers. I have a PM brushed DC 12 V fan motor on of a standard electric cooling fan on a car radiator. My calculation comes out to be about 90 watt. I also have PWM 12-24 power...

For a simple DC motor like this: http://i1-news.softpedia-static.com/images/news2/How-Brushless-DC-Motors-Work-3.jpg Does it reach a constant rotational speed? I know that when a current flows through it, Flemmings Left HAnd rule causes a couple of forces that results in rotation. As...

What would you do? Would you increase or lessen the turns of the coils? Would thinner or thicker wire be better? Would you increase the size of each of the iron cores of each pole of the armature? How do bearings assist the motor? Would simultaneously using both a perma magnet and an...

Homework Statement A simple DC motor consists of an armature placed between two poles of a magnet. The armature is rectangular and has dimensions of 90mm in breadth and 100mm in length. Magnetic flux density produced by the magnet is 0.5T. Number of turns of armature winding is 500. What is...

Hey guys, I'm working on a project involving a DC motor. I'm in school for mechanical engineering.. Electrical problems haven't really interested me so this is the first I've ever really looked into it apart from studying basic circuits in a physics course last year. Anywho, the project: I...

Hello, I would like to know what will be the shape of the torque-speed diagram in braking quadrant. Many thanks

Hey there... We are working on one DC motor after it was overhauled. DC Boom Motor 100 KW for Portrek Crane We have performed Servicing, Re varnishing,Commutator skimming undercutting Setting of Brush.and test the motor on no load.Motor was running perfect without sparking. When...

I am currently running a DC motor in an electric vehicle. A lithium polymer battery powers a motor controller which is connected to said DC motor to drive the car. The lithium polymer battery as you would imagine has a battery monitoring system on it. One of the conditions it protects against...

Does the efficiency of a gearbox just reduce the torque output of the motor? Or does it also reduce the speed? For example I have a motor with 100 N*m torque at 100 RPM, it then goes into a gearbox with a 80% efficiency and a 2:1 ratio. So the torque would be 2*100*0.8 Nm and the RPM 100/2...

[FONT="Georgia"][SIZE="2"] Hi to everyone :-) I'm new to this forum. I'm an engineer working in a core field. I need to design brush less dc motor of 30 W power, Inout voltage-13.5 V. I'm struck in winding design . Could anyone help?

Hello all, I hope you can fill a couple of holes in my understanding. As part of a school assignment I have investigated the relationship between torque and current in a DC motor. I have used linear regression and the linear fit is pretty good. I have done research on the relationship between...

This is not homework but I would consider it to fall in this category. I am working on a robotics project and wanted to simulate a PID controller before implementation. I need to find a transfer function for my motor for this to work. Homework Statement As mentioned above, I need to find...

According to http://www.aveox.com/DC.aspx" The way to calculate the output of a DC motor in kRPMs is the formula RPM of motor: kRPM = (V - RmI) / Kb V= Voltage Rm = Terminal Resistance I = Current Kb = Voltage Constant (V/kRPMs) This insinuates that an increase in amperage...

Im working on a model in SIMULINK of an electric drivetrain with an automatic transmission.. The overall goal is to develop an algorithm controlling controlling a CVT via factors such as current, angular velocity, etc. This may seem very basic to most of you, but i know that Output torque =...

I am working on a project where I have a ball-screw type linear actuator being driven by a 24V variable speed DC motor. There is another 24V DC motor that drivers a pinion and ring-gear. The linear actuator controls the system's elevation and the ring gear controls the traverse. I would...

I have some confusion on how to power a 1 hp DC winch motor that is intended to run off a 12 V battery. I need to precisely control the velocity of the motor and will need a PID controller to do this. Since speed of the motor is proportional to the supply voltage, is 12 V the maximum voltage and...

Will a generic dc motor interrupt the circuit fast enough to get a ac current on the other side of the transformer. I was assuming that a motor interrupt the flow of current.This is to feed a voltage multiplier.

Homework Statement A small dc motor has the following specifications and is being considered for powering the propeller of a model boat. The propeller has the intended capability of supplying 0.1Nm of torque at 200rpm. Operating voltage = 4.5V Stall torque = 6.6*10^-3 Nm Stall current =...

I need to build a micro pancake DC Motor. I actually need 32 of them connected in a line with one power supply. The motors need to be about the size of a dime. Could someone write me a how to guide on how this can be done. It is for a prototype.

I'm a mechanical engineer selecting a DC motor. I have the values for rated continuous operation, but I would like to have a ball-park figure for "almost" peak power consumed (which can only be sustained for a few seconds). I realize that absolute Peak Torque is when the motor is stalled. For...

A while ago I built a pc board that serves as a 3 channel SS relay. The output thyristors are 25A. This circuit uses a zero cross opto coupler to fire the thyristor and turn it off (DigiKey MOC3042). I've used many of these to control aa AC wash machine motor (on/off). The first question is if I...

Hi everyone. This is my first time trying this. So please be gentle. My question is to do with a dc motor. I want to build a wind generator and I am trying to figure out what size motor to start with and try to size the blades to get the best out of it. I know that their is a lot of other...

Hi all, I am new here as i want to ask something about an engineering project i am working on. I need a motor to rotate a 200 grams cylinder which will be hanging from the motor's shaft (vertically). I wanted less than 100 rpm so the motor I chose is a 2.1W 6V DC motor with a 50:1 reductor...

I am in the early stages of the design of a telescope mount and I need a control motor. I am hoping to run it on a battery so I think a DC motor is the way to go, but I need to be able to keep the rotation speed extremely constant for photographic purposes. So, to my question: Does anyone...

Hey guys, I'm new to this site, and am a university student studying Electrical and Electronics engineering. I just completed a design project controlling a BLDC motor (pretty low powered at 60V, and giving output rpm of about 6000rpm). Now I had an idea where instead of using a single BLDCM...

Hey everyone. I'm a beginner when it comes to making stuff with motors and batteries. Could anyone give me a link or a very good explanation on how to wire a 9 volt DC motor to 2 9V batteries (that are supposed to be wired in parallel) to power a propeller? I have the motors and the batteries...

http://img23.imageshack.us/img23/6131/17743493.jpg One thing bothers me... If we have a wire with NO insulation, and we make a loop like in these 2 examples. Connect those ends to battery. Current runs from + to -. Now, will the current behave like in A or in B(no insulation). I know...

Hey Guys ! I am working on a personal project, and I was hoping you could give me some help and advices. I am looking for a tool/device that would reverse the action of a small 12V DC motor (make it operate clockwise and then counter-clockwise for example). And I was also wondering what kind...

Hello, First time posting here as I havn't been able to find a suitable answer to my question to help me understand some issues I am having with DC motors. I am trying to calculate the maximum speed and acceleration of a dc motor being driven by a current source with a known inertia. I...

quick and urgent:I need a DC MOTOR hi I'm designing a telescope mount and I need a motor which has less than 1 rpm I think I'm going to need (( 12 V DC 1/3 rpm )) please if you can help me !

Hi all, This is my first time making a somewhat complicated circuit, with the help of an online schematic. (http://www.dprg.org/tutorials/2005-11a/index.html ) My goal is to make a New Year's Eve ball-drop, which has a motorized controlled-release lit-up ball (on a separate power...

I've been studying the concept of operation of DC motors and there are a couple things which I'm having trouble with. When the rotor is rotating, there will be "cutting" of flux and according to Faraday's law an emf is supposed to be generated such that it opposes the change in flux producing...

Hi guys, I am a bit confuse on how to calculate the power of the motor, the torque and the speed of the motor shaft + how to find out the rpm. Basically, i want to buy a motor which will be able to travel 100miles with a min speed of 55mph and have a total load of the vehicle of 600kg. if...

Hey folks, I have been thinking about doing a little hobby project for while, but didn't have the right knowledge to do it until now. Basically, I need a relatively small Low RPM, high torque DC motor that can be controlled by a microcontroller. I'm using the arduino duemilanove and have...

Hi everyone. I came across this site yesterday during some targeted Googling and thought I'd give it a shot. I have a basic question about speed/torque curves for brushless DC motors. I would like to compute a speed/torque curve for a small three-phase brushless DC motor that I have. It...

Hello I need a little help here. I need to pick a DC motor to be used on a robot. I'm trying to calculate a minimum torque the motor should be able to produce, but I'm a little confused. torque = Force * distance = Mass * acceleration * distance (Ignoring moment of inertia created by...

Hi everyone, Im currently doing my final year project and I need to calculate the torque of a DC motor so that I can replace it accordingly by another motor. Here are the motor's specification : 400V, 50Hz, 6poles, 200kW, 1400rpm, 371A Can anyone please help me sort this out. regards...

Torque has an inverse relationship with motor speed and I can understand why it's like that (more speed = more cemf = less current = less torque). On the contrary, my SCR controlled DC drive manual said that a DC drive could control a DC motor in a way that give constant torque from 0 rpm to...

I know the magnetic field makes a circle around a wire with current flowing through it. So I wondered if a motor could be made in the following way. Take a round plastic sleeve with an inner diameter slightly more than the wire. Glue 4 magnets on the sleeve, such that they form a circular...

Hey guys, just a quick question, what would a graph from 0 < x < 360 for magnetic flux look like for a DC motor, where the coils initial position is parallel to the magnetic field.

Hey guys, I have a DC motor and i want to glue to it's rotor a round plate (make a hole through it and stick the rotor in that hole :) )(consider the plate weightless) and on this plate i will glue a weight, doesn't matter what the weight is...just know that it's constant. My question is this...

In a field loss event, why does a shunt wound dc motor run away? From my understand of electric motor, the armature spins because it's magnetic field pushes/pulls against the field winding's magnetic field. If I remove power to the field winding, then shouldn't the motor slows down because the...

Hello, I'm doing my thesis on dc motor position control, using the Simulink's Real Time windows target.The dc motor is Faulhaber 2342024CR(DC micromotor). First of all, I need to simulate the motor so as to have a full simulation of the whole system(motor,servoamplifier). The problem is that...

Homework Statement Hi, well my task is to construct a DC motor. With 25w rotational mechanical output power. It cannot draw more then 5A current, and has to have 3 or more poles in rotation. The motor must be brushed/commutated. There is a max of 30v D.C. input. The motor needs to be built and...

I am trying to drive a 5V DC motor using a MCU output. The motor is run directly off the +5V line which is down-converted from 18V using a TPS5430 Step-down converter. The MCU coding is basically that when the inputs are in the correct state, the output to the FET turns on for a number of...

Hi, I am attempting at making a simple device that will run on dc power that just spins a item i place vertically in the air. I am trying to do it without having to by any of the parts being i could just buy a new one for around 250 bucks. My first question is how to you determine the...