Torque Definition and 1000 Threads

Hi to all. I am simulating a "core less axial flux PMG". This PMG has significant cogging torque. I don't know where this torque comes from because this is a core less generator therefor there is no slot in stator ( no reluctance variation).

Homework Statement A 0.23-kg turntable of radius 0.31 m spins about a vertical axis through its center. A constant rotational acceleration causes the turntable to accelerate from 0 to 26 revolutions per second in8.0 s. Calculate the torque required to cause this acceleration. Homework...

Hi team In my one of the application I have to use the gear box to rotate 500 kg load I have to use handwheel to rotate I am using the formula Torque= force x per. Distance x coefficient of friction = 500x.7x.8 : 2800 Nm Is it correct to calculate the torque I have attached the image for...

If I have two wheels with a contact point connection when the one of the wheels is starting a rotation due to a certain torque which condition do the torque have to fulfill in order to: 1) starting the rotation 2) guarantee a rotation without skid My toughs for now are: 1) the torque has to...

Homework Statement Find the net torque on the wheel in the figure below about the axle through O, taking a = 13.0 cm and b = 31.0 cm. (Assume that the positive direction is counterclockwise.) pic...

Whats is r ? knowing that formula is T = F x r... please help me. thank you!

Can anyone help with calculating the starting and stopping torque required to rotate a uniformly laden beam with a total weight of 200kg around a fixed axis. The beam has a length of 2200mm and will be started from stationary, rotated through 70 degrees at which point it will stop and reverse...

Hello, I am trying to figure out how much weight a particular motor/wheel setup can handle. I have an electric motor that puts out 6000ft*lb of torque, and is driving 44" wheels and needs to reach a maximum of 2RPM. Acceleration doesn't really matter so long as the wheels are able to get up to...

I am building an electric go kart , and I'm just trying to get my initial justifications correct, with respect to the classical physics involved. SPECS: motor rpm 1600 : motor output watts 425 :gear reduction ratio 10:1 . The Motor i have has a max RPM of 1600, an...

【 mod note: moved to H/W forum so homework template is absent 】 Dear all i am trying to calculate torque in HAWT from the measurements using Rope brake dynamometer set up with a blower. i had wound a string over the turbine shaft. The string is connected to a spring balance on its one end and...

Hi everyone,I am designing a mixer that will combine silica sand with a small amount of sulfuric acid and need to properly size a motor/speed reducer assembly for this application. The mixer will be run at an operating speed of 60 rpm. The blade configuration in the mixer will be similar to...

im working on making a diesel/electric semi conversion on one of the trucks at work. does anyone know how much torque a 550kva generator will make, top rpm rating is 1200 and 50hz, engine is a c15 caterpillar running 410kw. having a really hard time finding the answer, any help would greatly be...

Equations: Net torque=0=Net force I believe this is a static equilibrium question but can't figure out how to do it

Here in this case an arm in special constrain. The arm is capable to rotate around the main center if force is applied to the center. The torque practically generated by the force that is pushing Tarm. Tamr rotates and pulls with more or less the same force at the top that horizontal force then...

Greetings All, We have a stack of parts which needs to have the height measured with 100 lbs of force applied. The plan is to put the stack in a vise and, using a torque wrench, tighten to handle to 100 ft/lbs. This doesn't seem right to me. Will 100 ft/lbs of torque equal 100 lbs of...

Hi all - This may seem like a very simple exercise, but for some reason it's giving me trouble... I am trying to determine the difference in energy (ultimately looking for kWh) used between two different electric motors by utilizing instantaneous torque measurements I have. I would like to do...

I am conducting some research into finding the force which a rotating link will exert. The link is actuated by a motor which provides 30Nm of torque. I need to find force in x,y,z directions F=[Fx,Fy,Fz]; Is the answer [Fx,Fy,Fz]=[tau/Px,tau/Py,tau/Pz]

Hello everyone, I want to build my own computer desk for past few years and soon I will have enough money to do so. What I am trying to do is make it look like normal desk and by pressing "THE"button all monitors will raise up from inside of it. I quickly sketched some mechanism so you can...

This is rewording of a question on a test I've just done. A vinyl record on a turntable has radius R=0.15 m, mass M=1.5 kg. The angular speed is reduced from 33.3 rev per minute to zero as a result of an applied torque, in 7 seconds. Moment of inertia given as I=1/2 M R^2 Calculate a) angular...

There is a stick of known length l and known mass m1 with its balance point in the middle. By placing an object of unknown mass m2 at the far end of the stick, the balance point moves towards the same end as the object by a distance of d. Calculate m2. Second, similar exercise: Stick of known...

Homework Statement A cylinder of mass m and radius R is set on a plane, with large enough friction coefficient to ensure at any moment rolling without slipping. A constant torque is applied along the axis passing through the center of mass (G) of the cylinder and perpendicular to the basis of...

I am confused about a topic regarding torque and slippage. I have been led to believe that for a car initially traveling at some constant speed: the torque at the axle of a wheel will be equal to the torque caused by static friction at the point of contact of the wheel. This is true so that the...

1. The problem statement what role does torque play in body stability and ergonomics ?

Hello, I was wondering if anybody could recommend a simple method to pick gears for a given task. I need to make a rough estimation to see if I'm off by more or less a factor of ten. The only method I have access to is very complex and hard to understand. Cheers

I'm modelling a car in a simulator for fun. The sim's method of acceleration is to apply a force in Newtons on a selected wheel. I've browsed a few topics and whilst some come close there doesn't seem to be any equations that takes into account geartrains. Also I'm fuzzy on the relationship...

A body in an absolute vacuum is suspended from an axle having no friction at the body or at the suspension points. A power source is affixed to the body which rotates the axle. At rest the body is horizontal. The body weighs 4000 lbs. The center of gravity of the body is vertically 4 ft. below...

Homework Statement Hi :smile: Calculate the forces F1, F2, F3. F1 is the force on the red wall. F2 is the force on the black center and F3 is the force from springs on the red center. Calculate the torques T1 from F1 and T2 from F2 and give the energy from these torques for and angle of 0.2...

How would I calculate what % of torque is transferred to front and rear wheels in a 4WD? The split happens at the lay shaft. Crown pinion(CP) attached to rear end and 4WD attached to front end on lay shaft. I have calculated toques as shown: For Rear wheel, Torque = gear box ratio * Rear CP...

Hello Everyone, I am designing Simulink model for HIL testing. Basic concept: Input: Throttle angle ----> Injection timing from that I have calculated requested torque (% of max torque)(chekced and correct) Real torque follows requested torque with delay. (long list of conditions depending on...

I am having trouble visualizing which two tires of a car will be pushed down based on the angular momentum and torque of that car. Let's say if its angular momentum is point OUT while its torque is pointing UP in relations to the picture below. My guess is it's the two right wheels of the...

Is a 6.5kg/cm torque motor enough to move (let.s say at 6km/h) a small go cart and a kid (total w. about 45kg)? this is the motor: http://www.amazon.com/dp/B00T48KC1Q/?tag=pfamazon01-20 PS: this is not for a homework but for a for-fun project.

Take this picture for example. Assume this picture represents a torque wrench applying torque on a nut, and a force F is applied at the centre of the black handle perpendicular to it. The force applied to the nut is: Torque = Fd There are times when a nut is in a very inconvenient location...

Hi, i'm hoping to get a bit of assistance with stopping a nut from coming un-done if possible. I have an application using a load cell which is being inserted into metal rod, and then pulled under tension. The load cell is inserted into a hole drilled in the rod and screwed in at the bottom...

The magnetic moment ##\vec{M}## of a charged particle is defined as ##\vec{M}=\frac{1}{2}q\,(\,\vec{r}\times\vec{v})##. Starting with torque ##\vec{N}=\vec{M}\times\vec{B}##, I arrive at a contradiction. Consider a charge particle moving at a constant speed ##v## anticlockwise in a circle of...

Hi, this is a question from a previous past paper that I am having trouble with. Am I meant to just use the number of teeth from each gear to find a ratio and use this to find the effective inertia at point C. Then use this to find a torque and take away the torque of the constant load. My exam...

Homework Statement An object of moment of inertia I is initially at rest. a net torque T accelerates the object to angular velocity omega in time t. The power with which the object is accelerated is? The right answer apparently is [ I * omega^2 ] / [2 * t]. Could anyone please explain why...

Hey guys, thanks for taking a peek at my post! <3 For a part of my Electrical Engineering course we are required to complete a Mechanical Science paper, for which we only had very few lessons. As it's not my area of expertise or focus, I'm flicking through what little notes I have and pretty...

Homework Statement Homework Equations ok, I thought that the torque from the mass 'm' would be equal to torque from mass 'M' The Attempt at a Solution I wrote down: m * g * (d/4) = M * g * d (m/4) = M m = 4M Thus, the ratio is 4M : 1 m, which gives answer 1. However, the solutions say...

Hi, I am doing a design project but I'm kinda stuck with choosing motors because i am not sure of the required torque. My project is a handicapped golf vehicle powered by 2 motors, so it would need to be able of climbing steep gradients. I currently have an equation but I am not entirely sure if...

Im currently writing a code to find the optimum rpm points to shift gears to maximize acceleration. Thus far I've found the shift points and the rpm's after an upshift, meaning I have my bounds on my rpm vs torque curve. For simplicity's sake I'm assuming and increase of 1000 rpm to take 1...

Homework Statement Hi everyone, I am a first year physics student and we recently learned about torque. Every time I think I understand it something else comes up to confuse me - this time it is the direction. I tried looking in the forum and generally in google, but everyone only explains the...

Homework Statement Suppose we have a folding ladder, so that when its legs are spread it makes an isosceles triangle. Suppose it has a support that runs parallel to the ground. There is a bucket of paint that rests on top of the ladder, and the mass of the ladder is negligible. Data: The legs...

Homework Statement A textbook of mass 1.99 kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.150 m , to a hanging book with mass 2.97 kg . The system is released from rest, and the books are observed to move a distance 1.20 m...

Hello All, Is it possible to work back from drive torque at wheel to engine torque? Can it be described with basic equations and is the calculation same between all wheel drive and front wheel drive? Thanks Anj,

Homework Statement https://drive.google.com/file/d/0BxPEJS0qVOpeWENSREI1RlNsNDQ/view?usp=sharing A hub is connected to a shaft with a shrink fit (pressurized oil assembly, grease removed). The material of the hub is quenched and tempered steel (ReH = 450 N/mm2) and the material of the shaft...

Homework Statement A person is standing on tiptoe, with the total weight supported by the force on the toe. A mechanical model for the situation is shown, where T is the force in the Achilles tendon and R is the force on the foot due to the tibia. Find the value of T. Assume the total weight is...

Homework Statement A uniform beam at equilibrium is suspended by a cord at X which is 2m from one end of the beam and and 3m from the other end. There is a mass of 28N attached to the 2m end and a mass of 10N on the 3m end. Determine the weight force of the beam Homework Equations...

Hi, I have a problem that I've been trying to figure out for a while but cannot seem to get on my own. I'm trying to figure out how much power will be generated in a motor given a certain amount of torque. The problem is, to find the amount of power output , I also need to know the rotational...

So if a ball is rolling down a ramp and not slipping, you have two torques... the mg*sin(theta) portion of gravity and the (mu)mgcos(theta) for friction. My question is this: Does this friction force remove energy from the ball? (I know it affects the balls rotation but this is just changing...

I'm confused about this rolling without (or better with) slipping situation. Suppose to have a disk with initial velocity ##v## and angular velocity ##\omega##. The motion is to the right but the angular velocity is counterclockwise. There are no forces acting on the disk besides the kinetic...