Questions tagged [motors]
Questions regarding motors. All types of motors, their gearboxes, how to drive an electrical motor etc.
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Impact on high frequency radial forces on ball bearings
Dear Stackexchange forum,
Do high frequency radial forces (e.g. 6kHz) do significantly increase wear and reduce the life span of ball bearings?
I am looking for an expert in ball bearing research ...
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Will this pulley system work?
I want a system to move something in the opposite direction to the driven thing, but twice the distance. I'm thinking the below system of pulleys. I just wonder if it will actually work or will it ...
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Mechanism to engage and disengage a motor shaft
I have a motor attached to a spool, attached to a string. The string is attached to a rod that is able to move backwards and forwards freely but when the rod is pulled back too far it compresses a ...
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What are the issues with using a general purpose motor on a variable frequency drive?
What happens in this scenario - a modern electrical motor, three phase, squirrel cage, that is not specifically designed for operation via frequency inverter, is in fact operated on an FI? How long ...
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How to look for a stronger electric motor for a DIY candy panner?
I'm an amateur working on a candy panner project, similar to this one but with a dedicated motor instead of an attached drill. After some experimentation, I have a working V1 that I successfully used ...
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Pressure Boosting Pump Running Overcurrent
I'm working on an industrial water re-circulating system that is having an overcurrent issue that is baffling everyone involved (design engineer/plumber/electrician/pump and motor Mfg).
The system ...
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Unstuffed to Stuffed Two Stroke Engine
I'm working on a Puch e50 Engine.
The original engine used an unstuffed crank that had bushings instead of bearings. I've rebuilt the engine using new seals, bearings, and an aftermarket stuffed ...
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Worm drive vs Cycloidal Drive
In robotics, I've seen quite a few people make use of cycloidal drives. They seem robust, compact and have a relatively simple design, while still achieving high reduction ratios.
Yet outside robotics,...
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Geared Motor vs Direct drive with external gearbox
I'm looking to buy a small DC motor (~12W) which rotates at around 60rpm.
I have two options:
Get a geared motor which has an integrated gear box such that the output shaft rotated at 60rpm.
Get a ...
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what kind of Vibration Motor should I choose and how can I achieve my goal?
I'm building a vibration table for testing the durability of a metal rack, I want the vibration motor to create an even and average vertical displacement to the table, what kind of Vibration Motor ...
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High RPM CVT for Spindle Motor
I have been messing about with a 20k RPM spindle motor and want to try to have some more low end torque. I was thinking about using a belt or chain CVT so I can smoothly change gear ratios but is ...
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Method to achieve a constant force no matter the actual velocity when under load
So, this might be a somewhat strange need, as I don't seem to see many resources on this. I'm trying to create a device where I can set an amount of force for it to generate, and when it would behave ...
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How does wheel size directly driven by the motor affect the torque/speed/rpm applied to contact surface
I'm designing a compact tennis robot (ball launcher). I built a very decent prototype that is drastically lighter and smaller than what most others have built, is it's built using two brushless direct ...
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How do I find the optimal/best Gear ratios for an 3-speed transmission of an RC car?
[was told to post here, from physics stackexchange]
Says it in the title - I've done a bunch of stuff so far, but my work seems to be wrong.
I'm trying to build an RC car (pretty small, about 25 cm in ...
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Help identify this belt please?
Can you help me identify this belt? It is 2mm wide and has a length of 133mm. It is a drive belt in a tape player from the 70s. It is exceptionally thin almost like a plastic film. It does not feel ...
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Flywheel power vs. Gross power in bulldozers
In product specifications of bulldozers, the manufacturers give several figures for the engine power, such as flywheel power, net power - Net SAE J1349/ISO 9249, ISO 14396 power, and Gross SAE J1995 ...
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How to manufacture Inrunner BLDC motor core
I need to make a 10 slot BLDC inrunner motor core that is 40mm wide has 10mm inner diameter and 10mm thick. How would I make this? I would want to make it out of mild steel but I do not have a CNC ...
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What are the protrusions on the side of some electric motors?
The question is straight forward. What are the protrusions attached to the main cylinder of this electric motor?
This one has two protrusions that are the same size. Others, like the motor for my ...
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Bi-directional rotary to linear locking mechanism
I'd like help coming up with a simple brushed DC motor-powered mechanism that achieves the following.
Rotating the motor clockwise causes a linear mechanism (a pin) to arrive at position A
Further ...
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Examples of uses of different voltages as seen on motor nameplate
The electric motor nameplate (pictured) has a variety of different voltage configurations which are listed. I understand that the motor can be configured to run on different voltages by changing the ...
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I want to simulate Motor output WRT throttle
I don't have any idea on how to get started. Can you mention required relations and concepts to get started.
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Calculate constant power applied to displace a mass a given distance within a given time
I'm trying to determine electric motor power sizing with requirements given for covering a particular distance within a certain time. The knowns are the vehicle mass, the allotted time, the target ...
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How are the motors coupled to pulleys in this scara robot?
Several years ago the CoRETS group posted a animated video about a novel SCARA robot https://youtu.be/P3iIIqFkSIc but there are no references to it in the literature. I cannot understand how the two ...
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Remove slack from geared stepper - without touching the gearbox?
I have a Nema 11 stepper motor with a planetary gearbox and think it is a great stepper motor for a project I'm trying to do. One thing I noticed is that the output shaft of the gearbox has some ...
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Slip ring mounts
I am trying to research slip rings and their mounting options in order to design a BOM for a project that requires it.
Since I am still in the early design stage, I haven't chosen a type of motor, but ...
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Mechanism to even out force from linear motion
Not sure exactly how to explain this, but I am looking to use a threaded rod connected to a motor, to push and pull open a gate valve. My idea for this is to attach a nut to the handle of the pull/...
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Is there a special wrench used to remove this servo tachometer?
I tried using a pulley puller with moderate force to remove the tachometer but it didn’t seem so budge (although I didn’t use heat to soften potential adhesive inside).
Looking at the shaft I can see ...
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High torque timing belt
I'm building an automatic litter box for my kitty and I tried building two versions using a GT2 timing belt + pulley but the belt seems to slip from the pulley often (since it requires high torque) ...
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How do I wire up this Single Phase AC Motor? (Wye Arrangement)
The no-volt-release switch stopped latching on my single-phase planer thicknesser. The motor is under 1.1kw (1.5hp) and I understood that I would be able to drop in a generic switch.
However now ...
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Effect of pump suction lift on pump vibrations and motor current
Consider the case of an electric motor driving a centrifugal pump.
The pump is installed above the tank.
In Case-I, the tank is completely filled with water.
In Case-II, the tank is emptied and thus ...
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How does the magnetic field in a synchronous machine with two pole-pairs distribute if I only apply DC-voltage on two phases? (Star connection)
I am struggeling to understand the following:
If I consider a synchronous motor with only one polepair and apply dc-voltage to two of the three phases this results in a static magnetic field.
The ...
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Using a Lead Screw To Create a Two Stage Clamping System
I want to use a motor to drive a lead screw that first brings down a platform that locks into place and then controls a secondary platform to apply pressure but using only a single motor.
As an ...
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How to design a fast moving tilt table capable of lifting and holding 35kg/75lb?
I have a rectangular table about 0.5m(20") x 1m(40"). I need to lift one end of it, similar to a tilting table using something like a linear actuator (think CNC Z-axis).
The load is fairly ...
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How to identify electric motors, find pinouts, etc
This is my first question here so I apologize if I do anything wrong in making this post.
I recently pulled the electric motors out of two junked home appliances (a 120v clothes washing machine and a ...
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Is it legal to have a motor wound with aluminum wire that has the appearance of copper?
Today, I melted some metals for the first time, including some aluminum cans and aluminum parts from my drying machine. I was thrilled to create ingots from them. However, when I tried to make a ...
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Is this a feasible way to straight-couple to a gear?
I have some car window motors that I would like to directly couple to some roller-type shades in my house. I would like to introduce a direct coupling mechanism rather than use some sort of chain.
In ...
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Stepper motor response under varying load
I had a thought that came to mind that made me curious-- Though unfortunately I am not an ME.
I was wondering if someone could assist me in working through my thinking, but you will have to be gentle ...
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Do any continuously-variable-speed electric motors use Alternating Current?
All the "energy-efficient" continuously-variable-speed electric motors I've seen in consumer applications (e.g., HVAC, water pumps – all motors producing on the order of one horsepower) ...
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Best method to mount electric motor for chain drive for industrial machinery
I want to use this electric motor to run an industrial machine via ANSI roller chain. In the images most of the machine is not visible, only the sprocket on the input shaft and a bit of the relevant ...
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How to mount hub motor with strange shaft profile
I'm thinking about buying a hub motor that seems to be relatively common in the alibaba/ebay world but has a pretty strange shaft coming out of it (see pictures). It has a D profile that doesn't go ...
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Physics behind a realistic and theoretical DC motor
I am learning about theoretical DC motors where the rotational motion is produced due to torque on either side of a coil.
However, after researching real DC motors it seems to me that the winding ...
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Pumping machine (Centrifugal ) fails to pump
I have a centrifugal pumping machine that fails to pump up consistently. When powdered on, it spills up water, then stops and continues intermittently like that without a consistent flow of water out. ...
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Will providing below rated torque to a DC machine acting as a generator still allow it to rotate?
I'm working on a system that will generate electrical power from a mechanical input. If the mechanical input is unable to generate the required torque to meet the rated torque of the DC machine, will ...
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Flopping toy mechanism design
I've bought a flopping toy for my kid. The toy looks like:
Unfortunately, the toy mechanism inside jams when grabbed and the battery lasts for a short time:
I tried to do my own mechanism, printing ...
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What motors would work best for a 360 degree rotational platform?
I'm trying to build a 6 DOF 360 degree platform and I need 3 powerful motors to rotate 3 arms that hold the center platform. The Pitch arm is the first arm, which will be doing most of the heavy ...
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Tips on searching for components?
I'm a mechatronics engineer, and a big part of my job is searching for the right off-the-shelf (mostly mechanical) component for a specific purpose. It can be anything from vacuum pumps, flow meters, ...
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How to calculate the output torque on a split ring gear?
I have a nema 17 motor and I'm trying to lift 5 pounds of weight at a distance of 16 inches.
Correct me if I'm wrong, but it comes out to roughly 9 newton meters of torque required.
On my digital ...
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How can I improve this radial impeller (radial cooling fins) design?
I recently rewound a 1/4 hp single-phase induction motor used in a top-load washing machine (picture), but there's an issue: It heats like hell, from its own original design, and I rewound it exactly ...
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How should one wind the coils for a BLDC motor to maximize torque, if nothing else matters?
I'm trying to build a brushless DC motor with six winding arms, pretty typical design. If I'm trying to maximize the torque output of my motor, what would improve the motor best:
Extending the length ...
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What should be the clearance hole size for mounting a hub on a motor shaft?
I have a motor with an 8mm shaft diameter. I'm trying to make my own hub for direct mount driving a wheel. What diameter hole size should I drill for the hub's shaft which couples with the motor shaft?...
