What is Rpm: Definition and 248 Discussions

Hi guys, How would I go about calculating gear speed in rpm? If I know the input shaft speed, output shaft speed, gear ratios and tyre size. Thanks.

Hey guys! So I'm trying to do this pretty wide diameter in-runner engine, where the rotor is hollow (essentially trying to make a short tube within a short tube :D). After checking out the details between the different types of electric motors (and realizing that I can barely find any...

Homework Statement [/B] In a pulley system, pulley A is moving at 1,500 rpm and has a diameter of 15 in. Three pulleys, B, C, and D, all of different sizes, are attached to a single output axle. Speed and torque output are changed within the system by moving the drive belt between pulleys B...

The VFD I plan on using; DURApulse GS3 series AC drive: https://www.automationdirect.com/static/specs/gs3drives.pdf Model: GS3-22P0 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...

For my senior design project, my group is tasked with creating a wind turbine. At the moment, I am trying to figure out what approximate RPM the blades will rotate at so we can select an appropriate gear ratio and generator. Our advisor instructed us to use conservation of momentum on the...

Hi I'm working on a project in school (or at home) about brushed DC motors. I have recently built a prototype myself but instead of using permanent magnets around the armature I'm using an electromagnet from another motor that died. I intend to build another motor using the same armature but...

Hi... Need help understanding 1MW, 6kV, 1600 RPM,Cage Rotor Asynchronous Motor, 3 Phase, 4 Poles. I have the basic understanding of all ratings but have received very low price for this motor but when i searched on the internet it looked huge and had very high price as compared to what i have...

Hi all, Does anyone know of, or can anyone point me in the right direction for where to find a small, low rpm generator? RPM can be anywhere in the range of 100-300RPM, and size would be around 50mm long. To put this into context, I am building a small turbine (~300mm diameter), which will...

So I'm working on a senior design project and was trying to use a DC motor to charge a battery. The point is to allow for quick use to charge a phone or a laptop in circumstances where you need a quick charge. We have lead-acid batteries connected in series and parallel to give us: 14,000mAh...

Please I need some help. I'm thinking that if I have a driving shaft with a torque of 10Nm and an RPM of 1000. If I add two 3 inches pulley on the shaft to transmit power to another shaft with a pair 6 inches pulley mounted on it and connected to the initial 3 inches via a belt. Will I have...

If your axel in you car was magnetic with copper wire casing would that produce electricity? If so how much? If there is no resistance in that process then there wouldn't be a detrimental effect on the performance (bar added weight of the wire) With the raising popularity of electric cars it...

Hi, I have developed a hydro turbine (reaction type) I am testing the turbine for 3 bar input pressure (30 meter head). The turbine diameter is 30 inches. Torque produced is 109 Nm with 600 RPM without the generator (no load). As per Torque and RPM, power available at shaft (without generator)...

Revolutions(RPM) * Pi/30 = Angular velocity What is the purpose of pi/30 in the equation. Why can we not just use rpm as unit of measure of angular velocity?

...Up to 300 rpm (3 phase motor) and what sort of efficiency could I expect under normal conditions with a small load? Thanks

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...

Given f=ma, f/m=a v=a(t), v=(f/m)(t) Is it wrong to apply "v=(f/m)(t)" to situation where the force is generated by a motor? If no, then how come "v=(f/m)(t)" doesn't consider the motor's RPM? From my understanding, velocity should also be determined by the motor's rpm. For example, an...

Hi guys, Im trying to build an electric wheelchair with mecanum wheels, and as you might know, each of its 4 wheels has to be independently powered for the chair to have holonomic motion. With my desired speed to be around (brisk) walking speed only, say 1.15 m/s, and my mecanum wheels sized...

Hey Guys, So in the attached image I'm trying to determine what the rpm of the 60 tooth gear will be given the 8.4" tire will be rotating at .68 rpm, everything else is just an assumption on my part. I'm assuming the following which is probably wong: The tire being rotated at .68 rpm will...

Hi I'm looking for some info and advice. I've looked across the Internet and forums looking at different formulas for working out the torque requirements for a motor but can't find anything that helps me. I have designed a small amusement ride. Please see pic below. The outer ring...

Hello all, This is my first post, but I'm no stranger to skimming the boards. Always can find helpful stuff, but I'm stumped on this one. The situation is we have a Kohler 17 hp electric start gas engine horizontal shaft that max's out at 3600rpm. We are attaching a self-priming water transfer...

Hello I am wondering what the relation between motor rpms and propeller rpms. I know that once you put the propeller on you are going to lose some of that speed due to drag and weight of the propeller. Spec. Battery: 10 Cell /37V RPM: 231kv Max current: 80A Watts: 2960w No load current...

Are there generators out there that run on very, very low rpm? We're talking in the range of 20-50 rpm and no more. Power is not the biggest concern, but still is a factor.

I have a system that consists of a shaft and two selected gears. I want the shaft to be rotating at 250 RPM and to deliver an input power to the system of 850W. The input torque at the shaft is 71Nm. How can i use this information to determine how large my driving and driven gears will be...

i wanted to know if it's possible to run a heating coil which reaches some 300 C and a dc motor of low rpm of some 10 or so...and all this under 250 W??

Hi Just wondering if someone could help me! I need to know how much torque and RPM a motor will output for a given load (0.75kg), the only information I've been given is how the RPM and current vary with time for 4 different flywheels of masses 118g 166g 208g and 337g! the dyno test datasheet...

Howdy! I have a 10 hp motor on a machine but it's only using 3 hp while it's running. The output shaft of the motor is connected to a bigger pulley to spin a wheel. Is there any way to increase the torque at the wheel while maintaining rpms? My first thought was to use more of the motor power...

Hello, I'm working on a car simulation and I'm attempting to implement a manual transmission simulation into the game. My question is, how do you find the rate of change of the engine's RPM when the gas pedal is pressed in the car?

I figure my 2.4 liter Volvo will burn about a liter of gasoline over an hour of idling (source: Natural Resources Canada). Since a liter of gasoline contains roughly 33.8 million joules (~9.4 kilowatt-hours) of energy, I figure that that means my car idles at a power output of around 9.4...

I would like to clear out my understanding of gas compressor. If it is moving at constant RPM, is it mean that it can only allow same volumetric flow rate all the time? So the power will remain constant too, (P=VI) then voltage and current will varies. My investigation is to find why there is...

Ive been struggling with this for days trying to make sense of a rpm vs torque chart I've seen recently. The chart states the engine load was measured 100% 70% 40% 0% and at 1000 2000 3000 4000 rpm. How is this done if using a chasis dyno? I attached the chart for reference. That's my...

I have a 12V, 066A D.C motor, and 60 RPM. Want to reduce the RPM (60 to 30. What should I need to do?

With the increase in RPM could the electric out put of a generator be increased.

Hello All, I am trying to find a combination of gearing technologies to satisfy the below design challenge. I don't see a commercially available solution; I am hoping you might be able to help me understand what physical effects make this design problem hard, and propose solutions worth looking...

What is the use of torque of a motor? Is it not the RPM that is needed? And up to what percentage the torque could be reduced to increase the RPM?

What is the lowest rpm, currently, sufficient to generate an emf of a practical value? One site for generators states that even 1RPM is sufficient nowadays! Could anyone enlighten me, please? Thank you in advance.

Hello, Apologies I am not an engineer. I am hoping to find the approximate size of a system that rotates at a torque of 0.6nm but a rotation per minute of 1rpm. Ideally this would run off of dry cell batteries (e.g. 6xAA). Roughly how big would the gear system be to drop the RPM for this? How...

Hi, as I was reading on generators I noticed that apart from the homopolar machine(faraday disc) all other generators are basically AC , or if they are DC then the very current generating loop or part involves changing and time varying currents. They usually have poles on the rotor or stator...

I am trying to figure out the gear ratio's needed to turn a 24", 100 lb flywheel at 500 RM with a bicycle. I can not find a formula to calculate the size gears I will need. Can anyone point me in the right direction?

Hey guys I'm new here. I'm an ME student and I'm working on a project. I originally posted this on my350z forum and no one replied. Maybe it's too boring I don't know. If anyone has experience can you help me? Thanks. Hey guys, so I've been recently delving more and more into my z and wanting...

I'm reading about propellers and trying to get some of the basics, and some things are confusing to me. Namely, a quadcopter has a 12x6 prop, with a 6-pitch. That means in every rotation it should move 6 inches forward(up), but it doesn't do that at all since it's in hover mode. Wouldn't that...

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?

On what does the cfm of fan depend ? how to gain maximum cfm from a 1800 rpm fan ?

how to design a circuit to determine the rpm and torque from a fan?

Homework Statement A vehicle having wheels with a diameter of 58cm, is powered by motors that have a maximum speed of 6024 rpm. Each motor is coupled to the wheel using a gear mechanism as shown in figure 2-14. Calculate the required gear ratio if the vehicle's maximum speed is 190.2 km/hr...

I was reading something and they said i was to decrease the rpm of a dc motor to increase the torque.. What i don't get is the equation for torque is T=(2*p*N)/60 So increasing the rpm should only increase the torque right.. Im a little lost here..please help

Hello, first post! I'd apreciate some help on finding out the calculus for knowing the motor's torque needed for mantaining 2 vertical disks ø46cm, 30kg each at 300rpm, taking into acount 3 generic bearings friction that hypotetically is 0.5Nm friction torque I'm having some trouble trying to...

Ok so I was trying to design a flywheel for a project of mine and an idea occurred to me. Why not use a gas instead of a solid wheel so you didn't haven't worry about it exploding? Could you spin a conductive gas using electromagnets situated around the gas chamber? Whats the maximum speed at...

Hey guys, new to the forum. I am wondering how to find what the maximum rpm of a flywheel could be. I was looking at stirling engines, and trying to compile all the equations that apply to calculate the rpm of the engine. I know the equation for the expansion of gas in the cylinders and the...

Hi Guys, I just want to ask if there is a relation between fan RPM and the fan power consumption. Because in some specifications I see, Power consumption is not consistently increasing as you increase the Fan RPM. If we lower the RPM , will we still achieve the same airflow? if we always set at...

Hi All, Much respect and admiration to the majority of you highly ordered beings. My question is a simple one I hope, how can I get a 24v DC motor to reverse ~half a rotation when forward RPM get low (0-10)? Thanks