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1answer
4 views

Multiple Electric Motors on single shaft to improve efficiency

I am trying to build a super-efficient electric boat. The dilemma I am coming across is this: In normal long range running mode the boat will go at a slow 2.5 knots and only require 400 W power. This ...
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0answers
17 views

Motor internal resistance and max current vs stator dimensions? [closed]

Is it true that for a given stator diameter and length, and constant copper mass, because: $K_v = \text{constant}\times\text{motor turns}$ $\text{motor turns} = \text{constant}\times\text{wire length}...
3
votes
1answer
57 views

How to couple/connect shaft to disk?

I'm new to part design/mechanical engineering and I have the following question. Blue: steel shaft, 5/8" diameter, connected to a motor Green: aluminum disk, 10" diameter, 1/2" thick, 3" hole Goal: ...
0
votes
1answer
38 views

Establish a controlled rotation on gears

I am a 3d designer trying to build a simple device for my project and I have a problem. As you can see in schema below, point G has weight on it and it needs to be a controlled, vertical rotation. I ...
0
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1answer
39 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 ...
0
votes
1answer
45 views

How to control a roller gate using 2 motors - when one fails the other works

There is a gate which is to be controlled by 2 motors, but one should work and when one fails the other should work. AND THE CONTROLLER USED IS A PLC
2
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0answers
27 views

How to calculate torque requirement for vehicle with Mecanum wheels?

What are the changes specific to mecanum wheels when calculating torque requirements for a vehicle. I have the data for the vehicles mass, top speed and top acceleration.
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2answers
25 views

Do wave washers need to be on either end of bearings in double bearing induction motor

I have a typical small electric induction motor given to me in pieces. It has two wave washers which I am told should sit between the bearing and the assembly. I am not sure which bearing needs the ...
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2answers
23 views

Understanding input shaft torque for a motor without a shaft

I'm looking through this catalog at the motorized rotary tables and it says on page 114 that the maximum input shaft torque is 150 oz-in.The rotary table doesn't have a shaft so I'm confused as to how ...
1
vote
2answers
46 views

Power torque and rotational speed of a not running yet DC motor

If the power $P = C\omega$, so how a DC motor powered by $P = 10\text{ W}$ can work as $\omega$ is of course 0 rad/s at first, because if $\omega = 0$, then $P = C\omega = C\cdot0 = 0$?
1
vote
2answers
37 views

Coupler to connect motor shaft to perpendicular rod/shaft

I have a stepper motor (this one). Its shaft is of type "oval" or whatever, so like a circle but with 2 flat sides. Imagine the motor shaft pointing straight up, in the z-axis. I want a 6-inch rod, ...
1
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0answers
18 views

Calculating the proper power of a motor

I'm trying to build a filament extruder with some basic available tools and materials. Simply the main principle of the machine is to insert some amount of plastic raw material ( ABS in our Case ) to ...
2
votes
1answer
38 views

Calculating the torque requirements of the motor for a specific case

I want to use a DC 12/24V motor to rotate an assembly of glass tubes(image attached) through a hollow shaft of 25mm OD and 22mm ID, the shaft is supported on bearings on both the sides(assume minimum ...
1
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2answers
89 views

How much could this motor lift and how fast?

How much could this motor lift and how fast? If I connect a belt to its axis about 1cm away or even 10cm away from its tip. Torque: 1.5Nm Peak Torque: 10Nm Power: 9-30A, to 1000W. https://www....
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0answers
18 views

Driving parallel shafts with single motor and torque required to drive them

I want to drive 4 shafts in parallel with a single motor. The shafts will be driven by chain drive using double single sprockets as shown in figure. If 1 kg-cm of torque is required to drive a single ...
2
votes
1answer
30 views

Stepper motor skipping steps

I'm using two stepper motors (datasheet below) to pan and tilt a platform. The bottom motor spins fine without the breadboard glued to the top platform. However, it behaves unpredictably and skips ...
0
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0answers
52 views

How does one calculate torque required to lift a quadruped body with gear-worm driven legs?

I am designing a quadruped robot with legs driven by gear-worm motors as opposed to hydraulics or pneumatics. However, I am stuck at the calculations for the motors, motor drivers, and power supply ...
1
vote
1answer
32 views

What is your best recommendation to optimize the torque/speed relationship of a motor?

I'm a engineering student currently taking Thermodynamics and we have this project for our finals which is a sort of reeling /towing device, the assignment consists in a reeling motor that has to tow ...
3
votes
1answer
47 views

smallest highspeed stepper motors?

In my project I've been using galvo scanners for rotating small mirrors but they seem like an overkill at this point for several reasons: 1) Even though I use the slowest and smallest scanners out ...
2
votes
1answer
50 views

Where is the resistance in my DC hub motor coming from?

I'm designing an electronic speed controller for an electric bike and I recently mounted my wheel and performed some tests. The wheel (an old 24V brushed DC motor) works pretty much exactly how I ...
2
votes
0answers
48 views

How do I calculate the velocity of the piston?

I have a system with a motor connected to the trapezoidal lead screw. The lead screw is connected to the tube which is connected to the piston. The piston has to pump 1000cc oil against a pressure of ...
0
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0answers
23 views

Design torque calculation for an electric vehicle

We are building an electric vehicle. How is the required torque determined for our vehicle for a given total weight of the vehicle, highest vertical gradient and maximum acceleration? We need this ...
0
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1answer
30 views

Is hall sensor also used in PMSM drive scheme as like used in BLDC motor?

I am little bit curious about, is hall sensor also used in PMSM motor drive? Since in PMSM motor the voltage applied is sinusoidal, all 3 phase are active, so a rotating flux is introduced, which is ...
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0answers
30 views

Torque and Power Selection of DC motor

I have an object and I know the Inertia $(I)$ around the axis it needs to rotate at a constant speed $ (w) $. The operating acceleration torque of the load must be the product of Inertia and the ...
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0answers
7 views

How do I design an experiment to measure torque in series DC motor which uses leadscrew to transmit power?

I am designing a variable buoyancy system in which trapezoidal lead screw is used to transmit power from motor to piston using a connecting tube.The piston is used to pump oil in and out of the ...
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0answers
52 views

Extruder torque Calculation

I am wondering if there a formula or a guidebook in calculating the torque of an extruder. Currently I'm studying as an electrical engineering student and I need to choose an AC motor that's able to ...
0
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2answers
44 views

Running 220V single phase motor on 240V, and did I burn it?

I have a motor thats rated for 220V single phase. My house has 240V single phase. Im trying to run this motor but it doesn't budge and I don't even hear a hum. I know power is getting to it from ...
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2answers
21 views

Motors, Horsepower, RPM and Litres per minute

How do I get a rough estimate of how many litres per minute a motor can push?
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0answers
54 views

Understanding Electric Motor Power, Torque, kV etc, and How to Select Motors with the Right Power for the Job

I've got a project in my head about taking a 1/10th scale OpenRC truggy and replacing the 1/10th scale motor with four smaller motors, one for each wheel, to allow me to do torque vectoring with ...
0
votes
2answers
25 views

Motor coupling connection

I choose an AC motor (IEC) with frame number 71. The key on the shaft of the motor is $5mm,$, $4.23 mm$ and $6 mm$ in diameter. At other hand i cant't find a safety coupling (torque limiter) with ...
1
vote
0answers
43 views

How to regulate torque/RPM on an IWD vehicle

Generally, I'm interested in simple (DIY) electric vehicle design problems. I saw some photos of electric vehicles as in the following pic: or also you could check this youtube video. The vehicle is ...
0
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0answers
30 views

Derivation of motor shaft conversion load inertia

I'm looking for a derivation of this formula. If anyone could show me how to do it I'd be very appreciative.
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2answers
79 views

How does a two dimensional elevator work?

If you watch this video, you can get a sense of how an elevator can operate in two dimensions. But, what I can't figure out is how it is driven. If you consider a conventional elevator, there is a ...
1
vote
1answer
35 views

DC motor disconnect sensor

Looking for advice on how to turn off a motor when there is an item blocking a sensor. I found an inductive proximity sensor that I think could work. I am trying to make a brass case annealer similar ...
0
votes
1answer
64 views

What is a 10 turn potentiometer

I'm trying to figure out how to construct a CNC XY table, ala this instructable: https://www.instructables.com/id/Low-Cost-Hobby-Servo-XY-Table/#discuss I'm a noob with mechanical design/mechanical ...
2
votes
1answer
30 views

choosing between v belt and round belt for fast RPM, low torque application

My pulleys are going to be rotated with a 1000-2000 RPM motor, with a constant RPM controlled by a hall effect sensor, there is going to be almost no torque as one of the pulleys just has a 100 gram ...
0
votes
1answer
21 views

How to find required size of AC gear motor for planetary mixing application? [closed]

I want to find a suitable AC or DC gear motor for concrete paste mixing. The application details are given below Material type - concrete paste RPM - 30-200rpm Qty of material - 30Liters Mixing style ...
2
votes
2answers
73 views

How much torque will I need to pull a 2250Kg load?

I need to use this to find a motor that will be able to pull at most 2250 kg at a 1.5 m/s pace. At peak acceleration, I would like this to accelerate at 0.5 m/s2. The area that the load ...
0
votes
0answers
33 views

Am I looking for the right motors for my RC car?

I am working on creating an RC car, and I tried doing some math to determine the minimum motors I need for the wheels, but I'm not sure if I am correct. Would the following specifications be adequate ...
0
votes
1answer
43 views

Pan and tilt mechanism

this is my first project that i am working on. I want to make a IR sensor mount using stepper motors. I seen this on youtube and would like to make a similar design. I plan on using aluminium ...
3
votes
0answers
53 views

Mechanical engineering, Please help me finding the torque and answering other doubts too

Below I attached two BLDC motor commonly used for skate boards, I am confused with the calculation of stall torque for these two motors,What i need to know, What is the maximum weight lifting ...
1
vote
2answers
77 views

a small noiseless motor with accurate RPM control?

What kind of motor is suitable for the below requirements? 2700 rpm, needs to be accurate, not +- few rpms. I think the best approach is to use a hall effect sensor and adjust current/voltage on the ...
0
votes
2answers
136 views

Please Help me Read this Engineering Drawing

I am trying to CAD up a drawing for a plate for this motor to mount to. I figured it would be easy since they provided an mechanical drawing, but I have never seen one like this before. Can you please ...
0
votes
1answer
55 views

How do I connect a plate to a D-cut shaft?

i'm trying to connect a D-cut shaft to a plate for transmission of torque This is the motor that i am using with a 'diameter' of 4.5+/-.1mm My first question is whether I can use 5mm circular ...
2
votes
0answers
52 views

Choose a DC Motor for a skateboard

My body weight and that of the skateboard is $M = 90\text{ kg}$ I want to move 10 meters in 4 seconds. $$\begin{align} x(t) &= (at^2)/2 \\ x(4) &= (a\cdot4^2)/2 = 10 \\ &= a\cdot16/2 = ...
3
votes
1answer
56 views

Are all motors controlled with G-Code?

So I have laser cutter. And I am thinking about buying a control unit (this one, to be exact). But my concern here is the following: If the input DXF file contains splines, they will be converted to ...
3
votes
1answer
50 views

What thread could this camera motor be?

Firstly, I am sorry that the title of this question isn't helpful. I have bought these motors for a project: 5V 7mm 2 Phase 4 Wire Stepper Motor I assumed that the 1.7mm diameter threaded shaft ...
0
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0answers
184 views

Torque required to rotate a wheel

I am currently involved in a project (school) in which we are required to create an observation wheel. They rotate very slowly and are very heavy so require a large amount of torque to rotate them, ...
0
votes
1answer
47 views

precision positional control needed for shifting position of lenses

Looking for a way to shift a 30mm lens in two axis perpendicular to another lens. The lens is for shifting a video projection up, down, left, right. Basically what you will find in tilt-shift camera ...
1
vote
3answers
594 views

Meaning of O-slash in data sheet about gear diameter?

I have this data sheet for a stepper motor: The pitch diameter of the pinion attached to it is listed as "Ø6". What unit is this? Looking at the wikipedia page for Ø it seems like this is just a ...