An engine or motor is a machine designed to convert one form of energy into mechanical energy. Heat engines convert heat into work via various thermodynamic processes. The internal combustion engine is perhaps the most common example of a heat engine, in which heat from the combustion of a fuel causes rapid pressurisation of the gaseous combustion products in the combustion chamber, causing them to expand and drive a piston, which turns a crankshaft. Electric motors convert electrical energy into mechanical motion, pneumatic motors use compressed air, and clockwork motors in wind-up toys use elastic energy. In biological systems, molecular motors, like myosins in muscles, use chemical energy to create forces and ultimately motion.
I am a student doing an internship at IMEC, Belgium. I am studying a fan driven by a motor. This fan-motor system goes into resonance at a control frequency of 36.2 Hz. This corresponds to 18.1 Hz impeller frequency. The operating range of this fan is 30 to 40 Hz, so we can't...
As a part of our physics high-school self-study, we are making a stroboscope. We have a small 5-V DC motor that powers the strobe disk.
It works as expected, but, clearly, the motor makes the disk spin at a constant speed. Is there an easy, but effective and reliable way to control its speed...
Hello everyone !
I speak about energy to a fifth grade class. I want to build small windmills made of paper cup for the blades.
The goal is to light a LED when the windmill is running. I was looking for a small motor to do the alternator. I found this one and I wanted to know
if it could fit...
I have a motor and a 3 phase generator which I would like to connect together, i.e. let the motor drive the generator and measure it's output.
Each have their own type of shaft which do not fit together. I would therefore like to get some proposals, preferably which do not require custom work at...
I am a beginner in Electronics and motors, and I want to build a DIY device that is like this
I am just wondering how powerful is that motor that turns the globe in the device, which would hold the cat waste and litter. I am looking to get a powerful enough motor from Amazon.ca but just not...
If I have a motor with a full load power factor of 0.8 and starting power factor of 0.3 and I install a VSD to run it with a datasheet power factor of 0.95, will the power factor during starting be 0.3 or 0.95? And at full load?
Given the following input parameters:
Rs (Resistance through stator)
Rr (Resistance through stator)
Ls (stator inductance) = Lr (rotor inductance)
xs = xr = 2*π*f*Ls
xm = 2*π*f*Lm
I'm searching for information/procedure and also calculations/equations on how to correctly wind a stator on a (general or DC 3-phase) brushless motor? I.e. how to wind a copper wire X number of times around the stators, and thus get the desired performance/force that is required...
Given the AC Induction (asynchronous motor) in 3 phases:
Pn (Nominal Power) = Pmechanical (output power at the shaft)
5 kW = 5000W
uls (Voltage through the stator line)
fstator (stator frequency)
p (Number of pole pairs)
LFe (Iron loss) = Lmechanical...
I am working on an axial flux generator design, I consisits of 2 rotors and one stator, there are 6 pole pairs and 9 coils. Here is my simulation setup
The three phase windings are connected in star configuration through Maxwell circuit.
I created two bands enclosing each rotor and then united...
Want to know how to get the actual power the pump needs.
I can measure the flow rate by the flow meter and count the revolutions of the pump.
But selecting the proper motor for the pump would be a problem.
So I want to know how to determine the power of the rotary lobe pump and generate the...
Hello my dear physicists,
I'm trying to model the varied generated (needed)Torque to rotate a washing machine Drum during a Washing Process
so i assumed that the Model has as Input the target vilocity and as an Output the new needed torque to rotate the Drum(to be as a input for the motor...
I am working on my first ebike build and posted a question about friction drives earlier. Now, I have decided to go with a Mid-drive. I made calculations and found out the torque and rpm required for the build. But I am having difficulty find the right motor and gear ratio. I am trying...
Summary: For the same mass of copper wire, would more turns or greater thickness create a stronger magnetic field from a coil?
So I am attempting to make a brush less DC motor, and I am wondering whether the coils would create a greater magnetic force if there are more turns or if the wire is...
I am working on a 500 kg roller, which I want to pull using electric motor. I am considering hub motor, since it is easier to frame a basic ev with it. Now I need to know the capacity of the hub motor, I need to choose.
Roller weight = 500 kg
Frame weight + driver weight = 150 kg
I had made an DIY alpha type Stirling engine for my physics project and now I have to write an report about the relationship between the heat given to the engine and the motion of the wheel.
I had searched a lot about Stirling engines and I learned about work, energy, efficiency...
I am trying to build a 2-axis camera gimbal, which will control yaw and pitch. I have bought sensorless BLDC motors (GB280870KV) which I drive using SPWM. For knowing the camera orientation, I am using IMU sensors (accelerometer, gyroscope, and magnetometer) integrated on the...
Good day everyone. I have two magnets where if I rotate them 20° they disconnect. It has a 0.4 N* m force of torque. I want to make them move with a motor. However I need it as little as possible. So after doing research I found tiny motors that are around 4000 RPM. It doesn't mention the HP...
Hey, so for a capstone project we are working with 2 24V wheel chair motors. and the sponsor wants us to make it operate like a skid steer (two separate handles, one for each motor, controlling the forward and reverse speeds). Me and my group being a mechanical engineers, we are not so...
Could someone please help me with this.
I need to move an object which weighs 300 g horizontally, which is linked to a linear actuator consisting of rack and pinion arrangement which is driven by a servo motor. The speed at which the object should move is 3 m/s and the distance is 0.5 m...
I am trying to simulate an electric motor in ansys maxwell software, but I can't define the whole loop in four quadrants for the material used in the rotor however it is essential to do this since the motor is of hysteresis type and works on the principle of working point moving all around the...
Hello, for a project I need to select a motor which can rotate at 600 RPM with 3 HP of power. Do AC motors typically require a controller and drive? For example, I am interested in purchasing this. Do I need to buy an expensive controller just to operate it? How complex is the set up and...
Let's suppose we are given a set of requirements and we are to design a motor that meets them. Requirements are:
3 phase synchronous, 480v, 50Hz and of hysteresis type and alnico is the only available option and it should deliver a 0.6N.m output torque.
Dimensions should not exceed 150 mm and...
Not a question about completing homework here, but I'm a teacher looking to create a realistic engineering question for an assignment.
I have an engineering scenario I've set for the assignment which is a junior engineer working for a marine engineering company so all of the questions...
I'm boy who suddenly been strucked by curiosity on how hand crank generator works and i watch and read some of how to create one, specially this one on youtube:
and i want to create one but i don't have a 3D printer, but i saw some alternative but as i do/design my own coil based on...
I'm a engineering student currently taking Thermodynamics and we have this project for our finals which is a sort of reeling /towing device, the assignment consists in a reeling motor that has to tow a small car up along a slope, loaded with a certain weight, the team that is able to...
I need to perform stress analysis for the stand for an industrial sized electric motor like pic related. The motor stands on four legs. I need to know the force that the legs of the motor exert on the stand due to its torque. I have all the dimensions of the motor including weight and torque...
This is related to steel wire pulling machine. I have 2 cases.
In CASE-1: ONE MOTOR 160 kW
CASE-2: TWO MOTORS 129 kW Each. i.e 2x129 kW
Which case would have an efficient pulling force and efficiency Case 1 or Case 2.
If I need 50,000 Nm of torque to rotate a wheel, and I am rotating it about its rim (like the London eye), would 5 10,000 Nm motors each connected to a set of tyres to rotate it (the motors are not connected to each other), or would these motors first need to be connected to each other and then...
Write down the equations of motion and develop the continuous-time system.
See my word doc. or PNG's.
The Attempt at a Solution
See my word doc. or PNG's.
I assumed that there was no friction as no information was given.
I can easily get the transfer...
Hi in every theoretical explanation of any kind of DC motor there's always a split ring commutator and two brushes like in the following pic
then when it comes to my motorbike/car starter motor rebuild the real thing in practice is different- see the following pic with four carbon brushes- two...
SO, here is the case guys.
I have a mechanism to turn plate by a motor. Both motor and plate was connected through 2 spur gears.
But here is the problem,
when wind strike the plate, the plate start to rotate even without the power of the motor. What is the best way so i can prevent the plate...
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There is a lot of material discussing the rotational speed of the magnetic disk in HDD but not about the rotational speed of actuator arm.
What are the typical actuation speeds of the actuator in HDD?
This information will be used in the design of a fast shutter system...
I have a setup whereby:
1) A circular plate with fillet under-edge, is sitting like a bowl on some ball bearings. Imagine if you will a bowl sitting in a way that it can rotate and move a bit up and down etc. without much friction.
2) The plate needs to rotate at about 4 or 5 rpm.
I attach an image of something I am experimenting with.
The picture itself (and added text) should be self-explanatory.
1) Which way should my windings (clockwise or counter-clockwise) go around P1; P2; P3 & P4 for maximum voltage (V) ?
[ 1 Ø ]
[ 1 x single enamelled copper conductor ]
So I've got this crazy idea. To put it simply, to use the heat from anaerobic composting to power hot-air engine, specifically a Stirling Engine.
Based solely on my own reading, the center of a closed composting heap can reach anywhere from 120-160 degrees without killing the microorganisms...
Im new on the forum and I just discovered what are sync machines...
I have really basic question what I still cannot figure out.. I did some experiments with motor for different field currents and torques. In the result I measured armature currents and did V curves. But next...
I understand that essentially a dynamo is the inverse of a motor however I was wondering if I could have a little more detail on the subject, how exactly can you convert a motor to a dynamo? Is it as simple as turning the motor and wiring it up to an output to create the current or do you...
First of all, I'm new to this forum and to not know whether this thread is in the right place or not. If not, feel free to replace it.
I'm in my first year of university, studying industrial engineering. On a test I got the following image:
The red square is a block with a specific...
So I'm starting to do some tests with nitinol (order about 5 feet of wire just to do some basic tests and get a feel for the material before I go any further). I've seen a few variations on different types of motors that are powered by nitinol and am wondering if they all have the same...
(I'm a beginner)
I plan on using PCV pipe for the main body. The drill's purpose will be to install screws into pre-cut groves (basically a motorized screwdriver). These screws will be only a couple centimeters tall so the motor will only need a moderate amount of torque and rpm. It...
The VFD I plan on using;
DURApulse GS3 series AC drive: https://www.automationdirect.com/static/specs/gs3drives.pdf
The feedback card accessory for the VFD: https://www.automationdirect.com/static/specs/gs3fb.pdf
Hi everyone, I would like to know if I need this feedback card to...
My senior design adviser told me that the VFD must be the same brand as the motor that is being used, I'm not sure I believe this.
I plan on using a GS1 series AC drive, here is a link;
Here is a...
I would like to know what gear ratio i would need for my electric longboard. The goal is to run the longboard at 30 - 40 km/h at max power. Me and the longboards weight is approximately 65 kg. The brushless motor i am running has an rpm of approximately 18000 rpm (as it is an airplane engine)...
I'm doing a project where I need to hand power for dc motor (12V or 24V) and charge a super capacitor, and then use it to drive another 48V dc motor. I want to know which Super capacitor will be suitable?
Please give suggestions for Super capacitor specifications for both 12V and 24V that will...
I saw few threads here about air-gap in motors, and I wonder what if we ignore mechanical issues and make an "iron-gap" in the motor.
for example: in linear motor(e.g. this cute one: https://www.physicsforums.com/threads/linear-motor-equations.794499/) if we make the tube between the stator...