Questions tagged [motors]
Questions regarding motors. All types of motors, their gearboxes, how to drive an electrical motor etc.
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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?...
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Motor capable of 10Nm can barely lift 15lb
I have a 5.5 kW motor that I'm using for testing. I tried using it to lift a 15lb weight but it struggled. I reduced the amount of rope on the spool (there was a lot and then it was able to lift it at ...
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How powerful is this motor?
I am a beginner in Electronics and motors, and I want to build a DIY device that is like this
https://www.youtube.com/watch?v=-nXsYVWqXEQ&ab_channel=Litter-Robot
I am just wondering how powerful ...
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Welding rear freehub on ebike
I am making a homemade mid drive ebike. This bike will have the motor driving the front cassette which is modified with a freewheel so the pedals are stationary. However, since the freewheel is one ...
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how to plot power output graph for motors
What is the best way to plot motor power output graphs? Does anyone know how we can plot this graph for motors and engines?
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how to do this, connecting gaser engine and electric motor to a common shaft with clutch?
how to do this, connecting the engine and motor to a common shaft with the clutch? to make a hybrid engine for UAVs.
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Wired my 220V compressor duty motor wrong, did I fry it?
Installing a new 220V single phase motor on my air compressor. Carelessly hooked up ground wire to line 1, line 2 to line 2, and line one to the the other group of wires.... there were 3 terminals. ...
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Torque calculation for a robot [duplicate]
if I have a robot 50kg, 6 wheels and i want to move it inside a sewer pipe what is the torque required?
and there is any DC motor model can satisfy this function?
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Which tool to measure shaft alignment for small diameter shafts (d=10mm)?
I have seen many tools and methods to check shaft alignment, but they are mostly used for big shaft. I wonder if there are small tools for small diameter shaft with limited space to install?
Can you ...
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How to affix a 3/4" keyed bore wheel/pulley to 5/8" D-profile shaft?
How do I affix a 1.5-inch-thick wheel with a 0.75-inch keyed bore (or pulley) to my motor's 1.25-inch-long x 5/8" diameter D-profile shaft (both pictured)"?
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Clockwise vs. counter-clockwise rotation, usage of terms with complex machinery as with pumps and motors
This question might be considered off-topic, because it will elicit opinions. However, I think it is somehow important to know about unwritten agreements, so I give it a try.
I know that the direction ...
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Electric motor for low speed, high torque application?
Background
For my mechanical engineering senior design project, we are designing a cargo transporter electric vehicle for off-road conditions. The vehicle needs to transport loads weighing up to about ...
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Is there a type of motor or gear (or combination) that can match back driven resistance automatically?
For a fun project I wanted to try building a small workout machine based on the backdriving of a motor, that would match my force - or my force minus some small amount. Eventually I'd like to connect ...
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What mechanism would you use to lift, then at a certain point release something with a pulley, string & motor
I'd like to lift an inflatable cow up to a pulley I threw over a high branch and then release it to fall when it gets to the top, and then repeat the process. I currently have a loop of string between ...
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Are there hydraulic cylinders that provide thrust and at the same time transmit rotary motion from a motor to a generator?
I am searching for a practical factory-made hydraulic cylinder (actuator) that can provide an axial push of 140 kN against the shaft of the rotor of an electric generator and also transmit the 90 kNm ...
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Looking for a linear actuator that can carry a transverse load? Does such a product exist?
I am looking for a product that works like a linear actuator where you can control how far it extends but it can also hold a transverse load at the furthest point of extension.
What I am looking for ...
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Wear and tear on motors - soft start, also wear impact of sudden power loss?
I understand that starting and stopping electric motors puts a lot of strain on them compared to running them continuously. I suspect that a lot of this strain is due to the sudden inrush of current ...
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Why does an electric motor, of 800 kW at 400 V, have 7 connectors for power cables?
I found a Vybo electric motor and noticed that it has seven connectors for power cables.
I also found a Variable Speed Drive, Altivar Process ATV900, System ATV960, 800/630 kW, 400 V and its datasheet ...
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Can an electric motor act as a load for the electric generator rotated by that motor?
I have an experimental generator and an off-the-shelf motor that I intend to arrange like in Fig. 1. The problem is that if I connect the required load to the output of the generator the power drawn ...
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RS-550 motor only spinning in short bursts
I bought four of these motors, brand new and they all have the same issue. Amazon RS-550 , Amazon RS-550
I am a bit confused by the Horsepower: 100 watts claim. The motors require 12V from various ...
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Electromagnetism - DC Motor Design Question - EMF/BACK EMF
I'm not gonna lie - I don't have enough knowledge about EMF and Back EMF so I need you guys , my friend will soon build a DC motor for me but I currently have no idea what design will produce high ...
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What's the best way to attach 1 motor to 2 separate wheels on an electric skateboard?
I am in the process of building an electric skateboard. I have all the electronics working and now it's time to put together my skateboard. The problem I am having is that I only have 1 motor and ...
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Constant-force actuator for a lifting plate
Thank you for this forum. I am writing here because I struggle with a mechanics problem.
I am designing a lifting device for heavy charges. The load (F) is applied to a top plate. I would like this ...
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How do I match a VFD to an AC motor?
I have a 1 HP, 4-pole, 3-phase, AC motor which is inverter rated.
I need to select a Single Phase VFD to drive the motor. Some of my options are as follows:
1 HP, 120V, 3.7 amp
1 HP, 240V, 3.7 amp
1....
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"No Load Speed" for Series DC Motor - What does it mean?
The datasheet for the Maxon 110121 series-wound DC motor lists both "No Load Speed" and "No Load Current" as data points, and I do not understand what it is trying to communicate ...
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Understanding the units of columns in MaFaulDa Dataset
Recently I am learning about the MaFaulDa machine failure database. I am wondering about the unit of column zero (tachometer signal) measured by Monarch Instrument MT-190 (as announced by database ...
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Connecting a brushed direct drive motor to a wheel with no holes in the hub
I am building a 4 wheel drive rover robot. I was very lucky to find four good condition wheel chair motors on the side of the road. I had to disassemble the wheel chairs of course but well worth the ...
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Torque Problems vs Motor Problem?
I want to preface this by saying I am software engineer so each part of this robot build has been a lesson on its own. From welding, to CAD design, pillow block bearings, etc, etc....
I am working ...
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How to slow down an electric motor for pull cart?
I'm trying to retrofit an electric motor (such as this) to a pull cart as depicted below. I got most things figured out except for how to slow down the motor to a pedestrian speed.
Could I slow it ...
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Will the cart steer to the left/right by itself in this design?
I'm trying to retrofit a pull cart with electric motor. So, one wheel will have an electric hub motor and it is connected to a rotating shaft to the other non-powered wheel. The driveshaft is ...
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In a AWD Tesla Model 3, why is the front and back motor different?
In a AWD Tesla Model 3, why is the front motor (OEM 1120960-00-E) different from the one in the back (OEM 1120980)? Why not just use the same one for both front and back? I'm sure that there was a ...
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What's the minimum torque needed for 2 DC motors for moving a 1 kg object on top of them?
I have a weight of 1 kg and I want to properly choose 2 DC motors for them in order to be able to move the 1 kg of weight with variable speeds in the range of 0 to 1 m/s with an increment of 0.05 m/s. ...
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Torque calculation for DIY friction wheel drive electric unicycle
I’m building a friction wheel drive electric Unicycle.
Something like this;
My question is how much torque should the friction wheel drive motor have considering the total mass of unicycle including ...
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How does vibration monitoring with engine power differ?
How do engineers design vibration monitoring for motors with different wattage?
What effect does power have on vibration?
I consulted manufacturers of these vibration monitoring and did not see any ...
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Torque on motor shaft when shaft is rotated manually
The motor shaft is connected to a flywheel which is rotated manually to achieve a certain speed. Now when motor is switched on, how will it impact the shaft? Will motor whole power goes into ...
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Can a hydraulic vane motor have a specific rotational output?
If a vane motor/pump was used in a hydraulic circuit, could the rotation of the vane pump be controlled for slight movement in angles?
I imagine this would would require a feedback controller, with ...
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Retrofitting an old compressor with VFD
For an AC unit, the compressor - GK151PAB - Hermetic type, Permanent split condenser,2 pole, Single phase, Induction motor. This much I know about it. What else do I need to know and how do I find out ...
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Estimating yaw torque and power of HAWTs
I am trying to estimate the amount of torque and power required to rotate a 3 bladed Horizontal Axis Wind Turbine (HAWT) about a vertical axis("yaw" motion). I would like to estimate the ...
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Can I drive a pulley with two shaded pole motors using one motor at a time with different size pulleys for speed control?
Using two same RPM shaded pole motors, one with a one inch diameter motor and one with a two inch diameter. Using a DTDP switch to swap power from one pulley to the other. For a two speed rotation ...
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How to control speed of DC Gearmotor with Varying Torque
I have a system where the torque is constantly changing, but I need the speed to remain at 9RPM. I have enough room for error where I can be between 8 and 10RPM. How can I achieve this? All I can find ...
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Will the torque applied to a circular object be the same if the object isn't aligned in the center of the Torque?
I'm a student designing a system to automatically turn a steering wheel.
In this design the motor will be in the center of the steering wheel and it will apply it's torque on the steering wheel ...
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I'm trying to understand an equation from a motor simulation $\dot w_i (u_ i ,w_i,l _i , \dot l _ i )$
I have a simulated motor and I'm not understanding the math to control it.
This is the equation for the force of the motor, also called an 'actuator'.
$\dot w_i (u_ i ,w_i,l _i , \dot l _ i )$
w ...
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How to select the right power supply for a stepper motor?
When choosing a power supply for a stepper motor, e.g. this one below:
Amazon Link NEMA 23
This one has:
Rated Current: 4.0A
Operating Voltage: 24-50VDC
The Stepper Driver I will be using is:
Stepper ...
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Digital servo for my robot arm?
I'm planning on using this servo for my robotic arm project:
Amazon link.
It's a digital servo with 35 kg-cm (3.4 Nm) torque. However, when looking at other robotic arm projects, I've mainly seen ...
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Could I have help on understanding stepper motor speed?
I'm confused about stepper motor speed. On their data sheet it doesn't really specify a maximum speed. I want to use a stepper motor with a 3:1 gear ratio. This is the motor that I am looking at:
...
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How would I calculate the torque of the motor shown in the diagram?
Torque due to force of gravity:
-Payload: 0.2kg x 0.3m x 9.81 = 0.5886
-Hand: 0.1kg x 0.25m x 9.81 = 0.24525
-Forearm: 0.3kg x 0.1m x 9.81 = 0.2943
Torque due to force of gravity = 1.13Nm
What about ...
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Is ther any way I can attach this servo attachment to a normal DC motor?
I would like to use a small dc motor as a winch for a hobby project. I found a budget winch attachment on Aliexpress but it only attaches to hobby servo motors.
A servo motor has a 25t (teeth) 6mm ...
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How to pick a motor that won't stutter/vibrate?
I built a system that has 4 rods with a block attached at the end that rotates in a circle and stops every 1/4 revolution of a cycle. It then starts back up after a certain amount of time. What I ...