Questions tagged [motors]

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1answer
15 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 ...
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2answers
24 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 ...
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1answer
38 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): ...
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1answer
48 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 ...
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1answer
37 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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0answers
25 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 ...
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1answer
53 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 ...
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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 ...
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0answers
18 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
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1answer
47 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 ...
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3answers
35 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) ...
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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: ...
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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 ...
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3answers
65 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,...
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1answer
28 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 ...
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1answer
30 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
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1answer
66 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/...
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0answers
25 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 ...
1
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1answer
17 views

Real life example of motor/piston involving an isoterm process?

So I am involved in an introductory course in mathematics for pilots. I have the following problem I would like to give them, as it can be a practical application of integration However, does there ...
3
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1answer
45 views

AC Motor On/OFF Control using SSR instead of contactor

I would like to control a 1-phase 3HP motor using a SSR ( the reason being, I need to switch it on/off using a signal (0-5VDC). Are normal SSRs (ex:Fotek 40A model) capable of handling the starting ...
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1answer
29 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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3answers
44 views

Attaching Gear onto Motor

I want to attach a 12 toothed spur gear with a bore diameter of 6mm onto the shaft of this motor (6mm diameter). How would I go about doing this? From what I see, the shaft is smooth so is my only ...
2
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1answer
42 views

What will happen if we place a couple of separate, small stators around a long rotor instead of 1 large stator around a short rotor?

My original theoretical consideration was using the electric motor's rotor as drive shaft in a car. It led me to this question: "What will happen if we place a couple of separate, small stators around ...
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2answers
32 views

Sizing an AC Servo Motor for lifting pallets

I am trying to size a servo motor and my basic physics and math is so rusted that I can't figure out how to go about it? The scenario is as follows: I need to lift an object in the vertical direction ...
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0answers
35 views

DC Motor with a power supply. How to handle regenerative braking?

I'm currently trying to build a balanced inverted pendulum using a reaction wheel. I bought a motor (12V max 30A), a motor driver (Cytron MD30C) and a power supply (0-24V 30A). My problem is when the ...
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1answer
47 views

Impact of Gearbox on Motor Inertia

If you consider a motor attached to a spur gearbox with a reduction ratio of say $r=50:1$ which is then back-driven so that the motor acts as a generator, what would be the effective moment of inertia ...
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1answer
29 views

Reading Motor Datasheet

I'm doing my first machine design for a project and I have a Honda GX160 combustion motor which has the following specs for power and speed: I'd like to use 0.24 HP at 2000 rpm. Is this possible? Or ...
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0answers
40 views

Etymology of the term “journal bearing”

Typically the word "journal" refers to a collection of written records, experiences, or transactions. However, there is a common type of bearing known as a sleeve bearing, radial bearing, or journal ...
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1answer
60 views

Calculating optimal angle on a rolling pulley wheel, which holds weight, on a horizontal cable

The 40 kg load on the rope accelerates from 0 to 50km / h in 6 seconds. The rope is tightened with a force of 500kg while the whole assembly is on it. The middle pulley is driven by a dc motor. I ...
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1answer
36 views

Why large industrial units combine induction and synchronous motors?

We usually use induction motors to turn electrical energy to mechanical, however synchronous motors are the machines on the other side of the grid (generation). A week ago we had a student visit to ...
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1answer
24 views

How can I model a hysteresis curve from data?

I have the task of modeling the current to torque mapping for a given motor. I have an experimental set up where I can retrieve current, torque pairs. Now my initial approach was to model the ...
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0answers
62 views

Delta Robot: Torque and Motor Sizing

Question: Is 56 Nm enough torque for a delta robot with the below dimensions and specs? If not, what would be the minimum torque needed? Thank you in advance for your help. I am working on a rotary ...
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0answers
51 views

The optical encoder resolution

The optical encoder has a code wheel with a single track of slots and two photodetectors. The photodetectors are positioned so that they produce signals with a 90 degree phase difference. I want to ...
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1answer
53 views

How to rotate the blade?

I have developed a design for a river cleaning machine which can cut and collect weeds. The problem which is facing is how to rotate the circular blade which is attached in front of the machine. I ...
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6answers
3k views

Does a motor suffer damage when resistance to the intended motion is met?

I'd like to create something similar to a hydraulic press. I know I need some sort of motor, but I was curious about a fundamental question about motors when used in a system where the force required ...
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0answers
71 views

how to calculate required torque and rpm to through a 160 gram cricket ball horizontally at 160km/h velocity?

I am going to design a bowling machine. In this design, I'm going to use two motors that are being placed vertically and their shaft are attached with two horizontal identical wheels with a space of ...
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0answers
16 views

DC Inverter motor AC utilization category

I am looking at specs of an air conditioner unit. It uses DC inverter technology and maximum current listed as 21.5A So are DC inverter motors considered resistive or inductive? What utilization ...
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0answers
44 views

what does 775 mean in a 775 dc motor? [closed]

I don't understand sometimes what numbers actually mean in some naming conventions of many types of motors. Is there a good repository of knowledge regarding this subject except for those boring books?...
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0answers
16 views

Programmable motion on a metallic planar surface

This question is based on just a vague imagination. I am wondering if there is some way to programatically, make an object move on a planar surface in arbitrary paths (curved , swiggly lines etc) (not ...
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0answers
21 views

What is the top limit for torque per diameter ratio for electrical rotation mechanism working in a tube?

Use case: industrial stop valve placed in an another pipe welded perpendicularly making a T-shape. To make the question more specific let's consider 50mm inner diameter pipe for the linear actuator ...
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1answer
30 views

Why do pitching machines use wheels and not solenoids, actuators, servos or peumatic cylenders?

I guess that generating movement is harder then keeping a wheel rolling, but in terms of power consumption is it possible to compare the power consumption of a motor for driving wheels to that of a ...
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0answers
78 views

How to obtain transfer function of servo?

I am using a servo motor and controlling it via arduino. Servo motor is part of a control system and I have to use System Identification techniques in order to obtain the servo's transfer function. ...
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1answer
72 views

How can I calculate the power and torque required for the motor on a wheeled robot/vehicle?

How can I calculate the power and torque required for the motor on a wheeled robot or vehicle if a particular acceleration or movement up an incline is required?
3
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1answer
119 views

Working out Motor torque

I need to calculate the required motor for a mobility scooter with the following user requirements. The mass of the scooter with passenger = 120kg Max Speed of scooter = 9Km/h ...
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1answer
32 views

Trying to reduce RPM of a combustion motor

I'm trying to reduce the rpm of a combustion motor. It operates at 2000 rpm with 3HP, and I need it to work at around 12 rpm (no matter the power). I've made the math with sprocket and chains, but the ...
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3answers
83 views

Why is the Bush of a motor not replaced with a ball bearing?

Ball bearing reduces friction to a large extent than sliding friction. Motors use a metal ring called bush which slides against the shaft when the shaft is rotating. If a force is exerted on the shaft ...
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1answer
39 views

Isn't this explanation of speed regulation in a DC shunt motor wrong?

This site:(https://www.motioncontroltips.com/faq-what-are-dc-shunt-motors-and-where-are-they-used/ ) explains the speed regulation of DC shunt motor as follows: If the load on the motor is increased, ...
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0answers
34 views

Rotating vertical pole setup

software person here, venturing for the first time in the design of a mechanical system for a hobby project. Please note I have some experience in disassembling, fixing, reassembling mechanical ...
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1answer
29 views

Contrradicting answers for relation of speed of a motor with current

For a DC motor, speed of the armature is inversly proportional to current. But at the same time, we know that torque of the armature is directly proportional to the armature current. Since speed can ...
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1answer
63 views

Calculating needed motor to spin a disk at low RPM

I'm designing a machine that I need to spin a horizontal disk at low RPM using a motor and gearbox. I'm not good at physics so I need help to find a motor/gearbox to fulfill my needs. It's a ...

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