Questions tagged [motors]

Questions regarding motors. All types of motors, their gearboxes, how to drive an electrical motor etc.

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How to calculate the right motor size & type for a soil sifter?

How would one calculate the proper size of an electric motor to properly drive a soil sifter? Assumptions: Screen: flat, 18"x24", 1/4" to 3/4" wire cloth (interchangeable screens), total weight (...
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2answers
105 views

Does the frequency of input voltage in induction motors have to be continuously altered?

I understand that for magnetic lines of the rotating magnetic field to cut the windings of the rotor (and induce current), the field has to rotate at a slightly higher rate than the rotor. But if we ...
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2answers
2k views

Motor torque calculation, about the units

This link shows a motor torque, power, and speed relationship, as shown below: With regards to its units, how does kW and RPM become equivalent to N.m?
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1answer
22 views

Building an ultralight electric hoist, what gearbox reduction / motor combination for torque / power requirements?

I am building an electric hoist. Design requirements: Lightweight Quiet Relatively low lifting requirements (100 kg) Relatively fast lifting speed (80 fpm -> .4 m/s) Low cost Simple Force ...
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3answers
80 views

Electric go kart

I know this may be a physics question but, will a 48 V 1000 W motor with 3000 rpm be able to move a 500 lb go kart on a concrete sidewalk? And, can I use one 12 V 101 Ah 27 A deep cycle marine battery ...
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2answers
26 views

Could you use anything as a fuel source for an engine or motor, if it's designed to use that specific type of fuel?

By anything I don't mean to put some random liquid in a car engine, but is it possible to design and build an engine or motor that could use something like tea or orange juice for it's fuel? I know it ...
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2answers
79 views

250W 24V Motors

(please note that this is a duplicate of a question the electrical forum, however, there are some mechanical subjects that would be better suited here.) I am trying to make an electric go-kart. I am ...
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1answer
32 views

Help with scaling torque and forces?

I am currently designing a ground based digging drill, that hopefully will be accepted by a commercial entity. I am currently working on the preliminary design of the robot and am hoping to move to ...
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1answer
27 views

Gear mechanism for automatic gate

I have a sliding gate installed on my compound wall. I want to control the gate opening/closing with a motor. I have the electronic circuitry to control motor start/stop. I m thinking about attaching ...
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1answer
53 views

Does a 6 channel motor driver exist?

I have just ordered a giant robot chassis on the internet that consists of 6 motors: https://shop.pimoroni.com/products/dagu-wild-thumper-6wd-all-terrain-chassis The only issue is that I am unable to ...
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1answer
30 views

Utilizing solenoids in electric motors

I have seen videos of solenoid engines but there were claims that they were inefficient unlike DC motors. I was wondering what would be the most efficient use of a solenoid in an electric motor. ...
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1answer
17 views

Does AC consume more electricity if it is showing less current?

A air conditioner has label 9 amp of current and 2000 Watt. But in actual reading it is showing 7 amp.(may be due to any fault, i.e. low Gas in compressor) Does it consume more electricity or less ...
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1answer
31 views

Designing A Freely Spinning Object

I'm doing a project that involves spinning up a (roughly) 2.28 kg object to 5000 rpm (via a DC motor) and then letting it continue rotating under its own influence (without any more input from the ...
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1answer
88 views

Motor MnM torque max weight can spin circular object

Here's is my problem I am trying to spinal object at high speeds My motors watts is 242.42 My motor max speed is 70,000 rpm My circular rotating object that will be right on motor is 60grams My motor ...
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2answers
46 views

What kinds of electric motors can produce a lot of power at low RPM?

Are there electric motors that can produce a lot of power at low RPM? Why couldn't a motor produce as much power as needed if you give it enough voltage? Why would an electric motor be able to produce ...
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1answer
38 views

how to determine how much speed a motor will produce under load?

I am working on a one-wheel project, I would like to use an electric go kart motor chain driven to a 30 cm diameter wheel and get 90 kg at least 13 m/s with an acceleration of 3 m/s2, I ...
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1answer
287 views

Calculating Minimum Gear Ratio To Lift Weight

I have a 337 watt motor, and want to lift ten pounds. What kind of gear ratio will I need for a gearbox I attach to this in order to lift the ten pounds at a constant speed?
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1answer
69 views

Resistor to limit maximum voltage of solar panels

I have two 20W solar panels (each Voc = 22.3, Isc = 1.22) in series connected directly to an axial fan driven by an EC motor (rated voltage 48V). Here the maximum operating voltage when very sunny has ...
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2answers
947 views

How do you increase the horsepower of an electric motor?

I read that a Tesla Model S P100D achieved 730 horsepower on a dynamometer. Would increasing battery size increase the horsepower? If not, what would?
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1answer
79 views

What would be needed to make a tesla fastest car in the world? [closed]

If you were aiming for 300mph then what would need to change and would it be possible. There is less heat so less drag which must be a huge advantage. What kWh battery pack would be needed?
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1answer
27 views

Atmospheric motor concept plausible?

So this is kind of like a stirling engine. Would this work? A box that has a crankshaft, and two connecting rods that is under a vacuum (with no air inside of it.) The connecting rods are facing ...
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1answer
8k views

Force Required to Lift a WEIGHT of 1Kg [closed]

I want to lift a mass of 1kg so how much force is required ?

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