Questions tagged [motors]
The motors tag has no usage guidance.
335
questions
0
votes
0answers
11 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. ...
4
votes
2answers
149 views
Lifting a cabinet using actuators or scissor lift
Disclaimer: I am not an engineer - just a DIY guy looking for some advice or help please, so please forgive me if I use incorrect terminology :)
I am building a cabinet that has a hidden inner cabinet ...
0
votes
1answer
19 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 ...
2
votes
0answers
28 views
Is there any side effect to soft start an AC motor?
I have a ground to water heat pump for my home heating/cooling (scroll compressor). The 3-phase 15kW-peak motor can be soft started but this option is off by default.
I'm aware of all the positive ...
0
votes
3answers
73 views
Replicate stepper motor with gasoline engine
For those unaware of what a DC stepper motor is, it boils down to an electronic motor where the rotation can be precisely controlled, i.e. you can control the rotation of the motor in fractions of a ...
3
votes
0answers
34 views
Starter direction for methanol engine
I am having a small 2.5cc methanol 2-stroke engine that I am building an electric starter mechanism for. From my research I was under the impression that for a 2-stroke engine like the one that I have ...
-1
votes
0answers
22 views
Calculate propeller's thrust & torque coefficient for a quadcopter brushless motor
I'm building a quadcopter and I need to know how to calculate the thrust and torque coefficient, $F = bw^2$ and $T = cw^2$ I need to get the $b$ and $c$ (but don't know how to). I'm using 1045 ...
-1
votes
3answers
58 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 ...
1
vote
3answers
60 views
Torque required to rotate object around axis using Stepper Motor for Kinetic Machine
Hey all,
I'm creating a machine to rotate a socket wrench using an arm attached to a motor shaft in order to make clicking sounds from the object therefore I'm trying to choose an appropriate stepper ...
-1
votes
1answer
15 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 ...
1
vote
2answers
36 views
Engage and disengage DC motor from free-spinning reel
So i want to have a reel (~4cm diameter) that will pull a ~80cm string with a torque of ~8kg-cm (edit: thanks for the clarification). To pull I want to use a gear motor. E.g. 12V DC motor like this:
...
1
vote
1answer
31 views
Torque Required for a stepper motor to rotate a socket wrench ratchet around an axis point
I'm trying to build a kinetic machine that rotates socket ratchet tools (e.g. https://en.wikipedia.org/wiki/Socket_wrench) to make a bunch of ratchet 'clicking' sounds for an art project. I'm trying ...
1
vote
0answers
13 views
DIY device to repeatedly depress and release gas pedal on a vehicle
The pedal needs to be depressed about 1/2 to 1 inch, once every three minutes. I believe the best way to do this will be with a rotating arm of length 2 to 2 1/2 inches that has rollers on each end, ...
1
vote
1answer
29 views
Is having one large motor more efficient than having two motors half the size?
I wanted to use multiple smaller motors to have the same strength as a large motor but spread out across a wider area. Is that as good as one large motor or is there some efficiency or power loss in ...
2
votes
2answers
26 views
How are planetary gearboxes held together?
I see that the housings of most planetary gearboxes consist of 3 parts: a front cap, a ring gear and a rear cap. Here's a common design:
In designs similar to this, the rear cap and the ring gear are ...
1
vote
1answer
45 views
What is the purpose of the steel plate in this coupler?
I've found a shaft coupler that has a steel plate in between, but it's not clear what its function is:
If it is to add strength to the coupler, isn't the coupler as strong as the weakest link, i.e. ...
1
vote
0answers
18 views
Secure loads to gearbox shafts
I have a sculpture that is designed to rotate over 3 axes at max. 30RPM and is mounted on an aluminium disc. My plan is to use 3 of these geared steppers and secure the sculpture to the Z-axis shaft, ...
0
votes
0answers
30 views
What is the fastest possible slot car
What is the fastest possible slot car one can build? What are the limiting factors?
Obviously, we have to require that the motor is aboard the car and that it's propelled by the wheels (we don't want ...
2
votes
0answers
30 views
Is having a keyway in aluminium for 30Nm a bad idea?
I'm designing an aluminium shaft hub for a 16mm keyed shaft with a maximum torque of 30Nm. However, stress analysis tells me that the keyway can suffer too much stress:
If my understanding is correct,...
0
votes
0answers
18 views
Is the viscous friction coefficient of a BLDC motor dependent on the system inertia?
I have to model the required torque to move a system composed of several mechanical parts such that this system performs a motion profile. It is a Maxon drive composed of an ECX Speed 16L BLDC micro-...
-1
votes
2answers
22 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 ...
3
votes
2answers
41 views
How to connect a motor shaft to a plate
I'm trying to drive an aluminium plate using a motor via a 20mm-wide 2mm-thick stainless steel tube. The tube is driven by a 6mm motor shaft via a pulley and the torque will be around 5Nm at most. Is ...
0
votes
1answer
70 views
What signals are expected on the connectors for this 12V Volkswagen Scirroco wiper motor circuit
EDIT: added a picture of a very similar unit.
I picked up a used VW rear? wiper motor that I want to use for a simple motion experiment.
Having no idea how to power the thing I popped open the case ...
0
votes
1answer
36 views
How to connect Arduino to brushless motor through only 1 digital pin
I know how to connect motor to Arduino with 3 wires: 5v, digital pin and ground. As I know only digital wire need to control "speed control" of my motor. So, if my Arduino connected to computer and it ...
-1
votes
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 ...
1
vote
1answer
23 views
What are the characteristics of a motor that will generate current and is powered by a 30 cc, 2-stroke small engine?
Problem: I am trying to hobby-build a generator using a (old, working, throw-away gas, yard blower) 30 cc, 2-stroke engine. The 2-stroke engine will spin a motor and I want the motor to generate DC ...
5
votes
1answer
35 views
Why would a specfication for a motor require that overtemperature protection be realized by modeling heat generation and not with an embedded sensor?
I'm reading the procurement documents for the R211 railcar contract, which is for electric multiple unit subway cars designed for rapid transit applications in New York City. The railcar's propulsion ...
1
vote
1answer
23 views
Calculating force transferred from pinion gear to rack
I am really challenged as I need to fit a bunch of motors in a 6" box acting as linear actuators. I was looking for linear actuators (most I found were brushed DC) at first but the ones I found that ...
1
vote
1answer
28 views
Basic intuition for motor torque
when shopping on digi-key or other electronics distributor, I can see the Torque - Holding spec, given in oz-in and mNm.
I understand Nm in a torque context when the force is applied as a lever at a ...
0
votes
0answers
3 views
Magnetization characteristics and static characteristics of SR motor from Ansys Maxwell. Part II
Continuing the topic:
Magnetization characteristics and static characteristics of SR motor from Ansys Maxwell
Are there any people in the community who are more or less familiar with Ansis Maxwell's ...
-1
votes
2answers
36 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 ...
1
vote
0answers
20 views
BLDC Motor underwater ; weird behaviour
I recently was riding my e-bike (with a bldc hub motor) and decided to cool the motor (it -the stator- was approx 100-150 celcius I think) in the river.
The controller is on the top of the bike and ...
0
votes
1answer
39 views
Using Integral gain for motor positioning
I'm struggling to see how Integral gain is used for motor positioning.
Suppose we have an AC motor (with a 2048PPR encoder on the shaft) connected to a winch which drives an object forwards and ...
1
vote
2answers
27 views
What's a simple machine to lift and drop a 100 lbs weight repeatedly using an electric motor?
Essentially I have a 100 lbs. pile driver with an eyelet for lifting it on top. (It's on rails) I want to set up and automated machine to lift and drop the driver at a variable pace. Preferably I ...
2
votes
1answer
44 views
Modeling the torque of a real motor
I am trying to control a real inverted pendulum by means of a DC motor, for this I must model the torque of the motor, the work I've done in this direction is the following (which I believe is right):
...
1
vote
1answer
61 views
Running a well pump rated for 230V on 208V power
I have a well with a 1.5 HP pump. The pump is rated for 240V input. At the moment, the only nearby available power is 4-wire 208Y 3phase. I am considering connecting two of the three phases to the ...
-1
votes
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 ...
1
vote
0answers
31 views
Given a BLDC motor with one shaft, where should I attach my encoder?
I have recently purchased an ODrive servo controller made for hobby BLDC motors. Since I had a BLDC motor at home, I did not purchase a dual shaft motor when I got the ODrive.
My question is if I ...
0
votes
1answer
55 views
Determine if car is moving forward or backward
I would like to know if there is someway i can figure out if the car wheel is rotating in clockwise or anticlock wise direction.
Im working on a project which determines if car rolled back on a hill ...
0
votes
0answers
17 views
Motor with Water Pump Through Shaft?
I am attempting to drive a device with a motor, but also require water input.
Is there such a device that serves as both a drive motor with a water pump through the motor's shaft?
In essence, it ...
1
vote
0answers
25 views
Wobbling DC motor head
I have used 250 watt DC motor, for DIY electric potters wheel. Motor rated with RPM 3300 and geared reduction to 330 RPM. The issue I am facing is wobbling of the motor head. This issue is with the ...
3
votes
1answer
52 views
What motor torque specs that is suited for a horizontal to vertical 90 degree lift?
I have this simple design to lift an access door, but I am looking for the motor specs to do this heavy duty job. This is a simple design, I have added some information of the time, length of the part ...
2
votes
3answers
38 views
Design Input: Rotary motion to Linear motion, What system should I choose?
I am posting this here because of the multidisciplinary knowledge needed to tackle this issue.
Problem: I have to make an electromechanical device that is required to have controllable (downward) ...
1
vote
0answers
20 views
Axis connection types
Complete hobbyist here. I have two questions I have a problem figuring out.
I have hard time finding information about axis and types of connections they have. For example take this worm gear reducer: ...
1
vote
0answers
15 views
how do you calculate viscocity from torque arm load cell measurements?
I have a piece of company developed equipment that uses a pot mounted on a rotating base plate with a 0.15m torque arm and load cell, a mixing paddle is used to stir the mixture while the controller ...
1
vote
3answers
70 views
How to calculate the torque created by a rotating motor?
I have watched this video where the speaker explained how the vertical spin of a quadcopter is stabilized, and how it could be unstabilized to make the drone rotate.
Here is a screenshot of the video,...
2
votes
1answer
30 views
Stepper motor speed control problem
For brushless DC motors we have hall sensors to keep track of rotor; however, for stepper motor we don't know the actual position of the rotor and therefore while changing pulses with some speed it ...
1
vote
1answer
32 views
Shaft Design for Motor Test Rig
I want to design a shaft for a motor test rig. The motor and generator are 48V and 1.5kW and the maximum torque produced by the motor is 18Nm. RPM varies from 2900-3100. What shall be my next steps? I ...
2
votes
1answer
73 views
Motor shaft mounting with clamps and bushings
If I'm in the wrong section of stack exchange, please help me go to the right place.
I am trying to find out if this combination of motor shaft and clamps will work out.
I found these clamps/...
1
vote
0answers
33 views
Is it possible to have the load cell signal as feedback to the servo drive of the servo motor?
In my project, I have to control the linear motion in one of the two modes. It will be either in position control or load control.
for the displacement control, The servo motor takes the quadrature ...
