Motor Definition and 1000 Threads

< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown >[/color] Hi guy's this is my first post so forgive me if i leave anything out. I'm designing a solar tracking device that needs to be mounted on a roof and i need help calculating the torque...

I'm working on making a model car, and am trying to calculate the torque required to accelerate the car from a stop to 1.22m/s in 1 second, so I can pick out the right DC motor... The acceleration required is 1.22m/s/s (~ 4ft/s) The weight of the car is 0.85 kg The drive wheels diameters are...

Hello, I need to buy a DC motor for my project work. My project involves rotation of a cylindrical disk of 1 kg, inside water (approx. 2 cm below the water level) at different speed ranging between 100 rpm -200 rpm. For this purpose I need to buy a DC motor but I am not sure of what...

I have a confusion about the rotation of dc series motor..Suppose I put some load on it and turned it on..Due to no initial back emf, high current will flow in the armature (and field) and due to high starting torque, the motor will start rotating at say,1000 rpm. This will induce back emf which...

I am designing a fishing pontoon boat at home. I am wanting to build into the pontoons a small water jet engine on both sides. Does not need to be jet ski type speeds. Just looking for an energy efficient motor that will exceed trolling motor speeds and still be small. I am more of a do it all...

Hi everyone, I am facing some problems in performing clarke-park transform for an induction motor(4 pole stator, squirrel cage IM). The motor is run with three sine wave inputs, 120 degrees phase shifted with each other. I am measuring the rotor position from the encoder and using twice of...

Hi everyone, learning a bit of hands on engineering and have no idea what to search in order to buy what is needed. I am looking for a motor that can be activated by a simple switch on a wire that will rotate a piece of metal 90 . degrees. Excuse the poor image but hopefully someone can point me...

I am having confusion about the no load and full load speeds of a dc motor. What exactly does 'loading' stand for? How do we change the loading of a dc motor ?What is the relationship between loading and the speed of the motor? Which situations does no load and full load refer to?

Hey all, simple question, when building a robotic leg (a small one, bout 30 cm with two partitions, thigh and calf) would one use a stepper motor or a servo? We want the leg to keep its position (as though it were a dc motor attached to a worm gear) and be able to lift 2kg. Any advice...

I want to convert 5 electric blinds from battery to an ac/dc wall transformer. Each blind operates with 8 AA batteries and the motors are rated at 0.6 amp and 7.2 watt. When you hit the up or down button on the remote, all 5 motors operate at once. I want to run them off of one transformer...

Assuming the stator and windings won't burn out, how fast can a magnet rotate before it structurally fails?

Should the propeller rotate clockwise or counter-clockwise? Which way will be faster and will allow the boat to accelerate the fastest?

I have been thinking about coils of wire carrying alternatingcurrent. From what I understand, a back emf is induced in the coil because there is a changing magnetic field around each individual loop of wire, and therefore there is a changing flux through each loop because the changing field...

i have heard it said that back force occurs in generators and back emf occurs in motors, however I was considering a motor and I thought that it seems to me that as the coil is rotating and it has the changing flux linkage, and thus a back end is induced in it by Lenz's law, this reduces the...

Hi all, I have a small DC motor which turns at 20 rpm. The shaft diameter is 6mm, giving a circumference of 18.85 mm. What I want to do is get an effective rate of 30 rpm. Can I do this by simply attaching a spool or spindle to the motor output shaft with a larger diameter? If so, would it...

I am having trouble understanding a process in the electric motor. using this website as a frame of reference (http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/mothow.html), as an electric current is passed into that magnetic field, shouldn't the current also be creating a magnetic field, and...

hi, so i want to be able to run a motor depending on whether or not an IR detector senses IR light. so the basic idea at the start was to connect the motor with the detector and a resistor in series and therefore if there is IR the current will flow turning on the motor. I then learned that the...

Hey all, me and my friend are attempting to control a 5v dc motor and make a LED blink simultaneously using a H-Bridge Motor Driver 1A - SN754410 and ATMEGA328 micro-controller(16mhz, 8bit). The issue is is that when my H-Bridge activates the motor using input from the micro-controller then the...

HI. I've read a lot of posts on centrifugal and centripetal force in space. But they mostly refer to the spinning space stations. I would like to know what happens when you take a motor with an axle and a mass on the end on of the axle, and you start the motor up.. I understand the whole law...

can you do it by increasing the series resistance?

I'm designing a robot to compete against a friend who is also making a robot based on the Robot Sumo competitions. We decided on the dimensions of our bots and placed a 2kg limit on their weight. I'm having trouble determining what motor to use that will be able to move my own ~2kg robot around...

It is said that crawling occurs mainly due to 7th harmonic component. Due to 7th harmonic the speed decreases by the ratio of 7. However speed is directly proportional to frequency. So speed should get multiplied by a factor of 7 instead. Should the change in frequency affect the number of poles...

Hello. As many others here, I am starting a project that involves some engineering and will at some point, if I go ahead with it, require an engineer to design and certify. But for now I'd like to understand the principals involved and dust off some of my 1st year physics and see how much of it...

I understand that from KVL e = v -IaRa e=k(flux)speed speed=(constant)*(V-IaRa)/flux But physically what causes the speed to increase? What force causes the rotor to accelerate? In fact physically, the rotor is moving because of field flux interacting with armature current's flux. So...

Hi everyone, I am trying to implement the current control (Id, Iq) of a four pole PM synchronous motor. I am having trouble in making the Iq current follow a set reference. I had also implemented a cascaded speed control for a dc motor. In that case, I adjusted the gains of the PI...

Quick question: I have a stepper motor that is 0.25 degrees per step, and so 4 steps is required for a degree. When we pump 20 steps into it, it moves 5 degrees. However, if we go to pump another 20 steps into it right after that, it does not move 5 degrees. Is it possible that residual flux is...

So I have a 28BYJ48 stepper motor... it is rated at a voltage of 5V. I would like to optimise its speed and torque, which could be done through increasing voltage, but I know that an increase in voltage means more current i.e. will get a little hot. My question is... if I do run it at a high...

Hi Guys, I am needed to work out the the amount of pressure an Air Motor will need to provide to keep an object on a slope in equilibrium. I have worked out the the force DOWNSLOPE of the object in Newtons- but I am unsure of the next steps to find an appropriate air motor (or what kind of...

I have no idea about this please help me to design a small sized high torque slow speed motor

The servo motor that I'm using says it has torque of 1.89 kg-cm. And the radius of the wheel I'm using is 3.5 cm. So i wanted to know how much load can two of these motors can together carry?

I had a thought that's been puzzling me this whole morning, its more related to classical mechanics, however I am dealing with motors so... I thought it would be appropriate to post the question here. Lets say we have to identical motors(with identical gears) placed vertically on a table. Those...

I am doing an experiment to determine the performance of a steam plant cycle and analyse it in comparison with the ideal rankine cycle. I have a sketch of the actual and real T-S diagram for the steam plant (See attached) I am unsure what factors cause the change in the shape of the T-S...

I have no idea regarding it I just know that we can control a motor movement and can move it both to and fro. please help

hey, I am building a fan, but I need the fan blade to move relatively slow, slow enough to see each panel on the blade. I am expecting to use a gear system with a belt. What gears should I use to active this?

Homework Statement Hey so I've made a motor that looks and works exactly like the one in this video The assignment is asking me how I would go about finding the angular velocity, specifically " Analysis of the energy changes involved in the motor to work out the speed/ or angular velocity"...

Hi, I`m going to design turning table (diameter of 60-80cm) made from aluminium, it will spin by the mean of an electric motor. I want the spinning speed to be variable, so I can control it from 0 up to 300 rpm (gradually or by steps where each step is 50 rpm) by them mean of remote control...

Hi everyone! I am trying to find the parameters of a surface mounted PM synchronous motor using the application note AN4680 (PMSM Electrical Parameters Measurement) and had some queries regarding it. The Ld process is mentioned as follows 1. Align the rotor to phase A. Phase A is connected to...

Homework Statement An electric motor develops 65kW of power as it lifts a loaded elevator 17.5 m in 35s. How much force does the motor exert? Acceleration: .5 Homework Equations F equals mass times acceleration The Attempt at a Solution Ok so I tried to find mass but when the equation was m...

A motor and driver have a total mass of 300 kg . The driver starts moving from rest reaching an acceleration of 5 m / s2. The net force experienced by the motor of the motorcycle is I'm not sure if i did this right cause they give 60 Newtons as one of the answers. I applied Newton's second law...

How to control the speed of 1.5 Volt motor?

For shaping an interior PMSM rotor from top figure to as in bottom fig, I made an equation based curve, united with another curve , made a surface using coverline and united that shape with my rotor. When validated it showed band and rotor intersecting and I adjusted the band - DiaGap. Then...

Homework Statement A locked rotor test is performed on a permanent magnet DC machine with the following results: Terminal Voltage 5 V DC Input Current 10 A DC Locked rotor torque. 20 Nm a) Making suitable approximations deduce the effective rotor resistance in ohms? b) Making suitable...

I am currently trying to drive a DC brushed motor, but its specs are unique enough that I haven't been able to find a suitable driver. I found one that almost fits our application but our amperage is closer to the peak then the continuous. So is it possible that I could put two of the same speed...

I am constructing a home built flight simulator and am using hydraulic motors with a arm attached to the motor spindle for movement. I need to know how much torque I would need in the motor to lift 1000 lbs. Also I need to know how fast the motor should be to move the weight 1 foot in 2 seconds...

I am trying to drive a 115V DC brushed motor with a DC power supply. Most drivers I've found are for AC to DC and the 115V supply seems to be to much for most DC to DC. Has anybody worked with driving motors with large DC power supplies? Or does anybody now where I might find one? Thanks...

Hi, If the voltage, full load current and full load output power (kW) of a 3 phase induction motor are known, and the efficiency is assumed to be 90% (is this realistic), am I correct in thinking that the full load power factor can be approximated (due to assumed and not actual efficiency) as...

Good day. I was wondering if anyone could help me with the following problem. As you can see in the diagram below, I want to set up a circuit with 4 DC Motors in parallel, each with a push button switch. And a variable resistor to control the speed manually. I would like a LED strip to be...

Hi, Is there a difference in efficiency between a three phase motor and a single phase motor, in terms of power in against power out. If so, could you please explain why one is more efficient than the other. The reason I ask is because I'm researching the development of the induction motor for...

Homework Statement This is not a homework problem but more of a clash of terminology I have encountered for an explanation of why a motor rotates. In class, I have been taught about the Lorentz force causing the armature to turn. Where electrons in the wire experience a force when they...

I am trying to calculate the power required and resulting force for a linear motor, but I have been unsuccessful in finding the necessary equations.