Questions tagged [motors]

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0answers
179 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 ...
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2answers
144 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 ...
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1answer
39 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 ...
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1answer
946 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
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1answer
41 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 ...
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1answer
27 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
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2answers
278 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 ...
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1answer
136 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 ...
2
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0answers
64 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 ...
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2answers
136 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 ...
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2answers
3k 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 ...
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1answer
406 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 ...
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0answers
66 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
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1answer
65 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
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1answer
51 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 ...
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3answers
70 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 ...
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3answers
1k 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 ...
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3answers
73 views

Water pump location

I am using a 1HP pump to move water from a ground tank to overhead tanks that are at 30 feet height. The pipe is 1 inch. Motor is currently exposed and open and I would like to know if I can move ...
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1answer
310 views

Dc motors for controlling wheels of a wheelchair

I am doing a project on controlling wheels of a wheelchair. The diameter of the wheel is about 25-30 inches, the weight which the wheelchair is supposed to carry is upto 80 Kgs and it should run at a ...
0
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1answer
25 views

What is the fraction of power transmitted to the generator in full-hybrid cars?

In full-hybrid cars like the Toyota Prius, usually both internal combustion engine (ICE) and electric motor produces mechanical power to the wheels at cruise. But some of the mechanical power produced ...
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1answer
60 views

Oscillations in motor control systems

I have an underdamped control system for a DC motor. It is only a mathematical model so I can't visualise the motor. I can change the value of the "k" or compensator. I have noticed that changing ...
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1answer
66 views

Selection of correct DC gearmotor with given load

I am designing an Actual working extendable welding station for my college project. The idea is to lift the unit up/down with the help of 2 lead screws and 2 DC gear-motors, one on each side. The ...
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1answer
86 views

Clockwork Motor feasibility?

Why is it that utilizing clockwork motors never came into fruition as power sources for things like vehicles and bolt shooters, in place of compressed air and strings?
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2answers
45 views

Washing Machines vs. Mixers

The motor in a washing machine oscillates at set frequencies as compared to a motor that spins very fast in a fixed direction in a blender/mixer. What I don’t understand however is : Don’t they both ...
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1answer
385 views

What is the purpose of a vacuum cleaner's bypass valve?

I took apart a cheap domestic vacuum cleaner because I am making a small vacuum-forming system, and I only need the motor/fan assembly, so I repackaged it to save space. Inside the vacuum cleaner is ...
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1answer
45 views

Motor for Toy Cars

I'd noticed that for the small motors, the ones used in toy cars, there are rpm values and voltage values written on the specifications. For example, I have a motor at a range of (12V - 24V) and rpm ...
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1answer
211 views

How do I attach an electric motor to a trailer wheel?

I have an electric motor which is intended for a bicycle/scooter and has a 11-teeth chain sprocket. I plan to use it to spin a trailer wheel (which have 4 holes for bolts about 3'' from the center). ...
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0answers
505 views

Determining brushed DC motor inertia for modeling a motor

I'm making an model of a DC motor, and following the guide for measuring motor parameters: I am having trouble measuring the motor's inertia, as the guide for this section is vague. This is a graph ...
2
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1answer
42 views

How to vary the force output of a motor while stalled?

I want to provide a gradual increase in force provided to a piston (perhaps 0-100N over the space of a couple of seconds maximum), up till the point it begins moving, and then drive it to a varying ...
2
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3answers
815 views

How to determine the compressor power in a refrigeration system?

The picture below represents a refrigeration unit In order to calculate the power produced by the motor, two quantities must be measured Angular speed of the motor. This parameter can be observed ...
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1answer
101 views

Why servomotor has such low torque compared with stepper motors?

It is easy to found stepper motors with torque over 2NM for a few coins, however, only expensive industrial servomotors achieve this torque. Examples: Stepper motor: 10usd for 1.3nm with 2.8V at 3....
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2answers
78 views

Stepper on high-RPM shaft

The CNC spindle is supposed to operate its single shaft in two different modes: high RPM (30,000-80,000 RPM), variable, possibly quite high torque, a straightforward PID to maintain the RPM as torque ...
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1answer
350 views

Why do the lights dim when I turn on a mitre saw?

The other day I was sawing some wood on my mitre saw. I have a single light bulb in that room and it was on. The moment I press the button for the saw to turn on, the lights dim a little and go back ...
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1answer
143 views

Which type of electric motor I need?

For an experiment I need to use an electric motor, unfortunately I'm not an expert of electric machines. The electric motor I need has to comply with some requests: It must be brushless. It has ...
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3answers
128 views

How borewell pump works? does water stays in pipe after stop?

I have 6 inch borewell of 1200 feet (domestic use). With camera test, we could see water storage is at 960 feet. i.e approx storage of 200 feet. i.e around 1000 liters. my question is, can we put ...
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0answers
48 views

Rotating four cylinders with one motor/actuator

I have a setup with 4 cylinders placed next to each other in following configuration. The cylinders are made of .2mm stainless steel. I would ideally want to rotate them along their axis using a ...
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2answers
139 views

How does a Y connection in a 3 phase motor create 230V without a neutral/ground

I know that a 230/400V 3phase motor requires 230V on each coil. No more and no less. So on a 3*230V grid it would be wired in Delta, on a 3*400V it would wired in Y. I went to evening school to learn ...
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1answer
35 views

ft-lbs to ft-lbs3 or newtons as well as strength of metal

I am trying to figure out how much torque this piece of metal that I have can deal with before breaking. Are there any tools online that can help me calculate these items? The hardness of this iron ...
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1answer
4k views

Force Required to Lift a WEIGHT of 1Kg [closed]

I want to lift a weight of 1kg so how much force is required ? This is my question. Again I want to mention that 1Kg is weight not mass. I think if i say weight then gravitational pull is already ...
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1answer
50 views

How to determine motor needed for water pump

I can't find what i'm looking for in the engineering stack exchange because it's all way over my head. need basic help answer the basics to get started. so maybe a link or video that helps me ...
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2answers
70 views

Source of a load torque

I am currently taking a course titled "Electric machinery and drives". We have started with the very basics, i.e with the following equation: $\tau_{motor} = \tau_{load} + \frac{\partial (J\omega_m)}{...
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0answers
60 views

Spinning a balanced load with DC motor

Enclosed within a consumer electronic, I would like to spin a small balanced load. The device will be rotated relative to gravity, but no other direct forces will be applied to the load. A coreless ...
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1answer
56 views

2 SPDT relays as motor driver, flyback diodes

I'm trying to use relay as high current motor driver. I'm not sure how to connect flyback diodes. This is my current sketch I've read a lot of on DC motors, but I couldn't find anywhere a schematic ...
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0answers
300 views

Angular Velocity of motor shaft as function of Angular Position

I have a set of shafts that need to be rotated at a high frequency (~1000 RPM) but not at a constant speed. That is to say, the angular velocity of the shaft needs to be a periodic function of the ...
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3answers
145 views

How to stop DC-motor with heavy weight from moving?

I'm planning to build a machine which at some point tows a heavy weight on a rope in the air. Once the weight is heigh enough up in the air I want to keep it there for about an hour or so, before I ...
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1answer
223 views

How to calculate if a motor is fast AND strong (torque) enough?

I’m working on a prototype and I’m having trouble picking out a motor for that job. I need it to be able to move a rope that is about 2-4 mm thick outward (like a winch in reverse almost) and I also ...
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1answer
738 views

Torque and Speed of a DC Motor with Pulleys and Wheels

I want to know how to calculate the speed of an electric skateboard If i have that situation(from the picture below) i will need an acceleration=0.16m/s^2? and a force F~=15N? So i will need a ...
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2answers
868 views

Why does the Compressor Fan for an Air Conditioner need a Starter Capacitor?

Our house air conditioner went out last Saturday afternoon on a +100 F day. Was able to diagnose the problem itself as a problem with the starting circuit of the big compressor fan of the outside ...
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5answers
568 views

Can an electric motor use reciprocating pistons like an internal combustion engine does?

Would it be possible to have an electric motor that uses an electromagnet to force a piston up and down to turn a shaft, similarly to an internal combustion engine, but without burning fuel? Is there ...
2
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2answers
96 views

Motor needed for large scale disco ball!

I am working on fabricating a large scale revolving disco ball for an event in Cincinnati. The scale is 10'diameter and the frame is flat bar steel. the exterior is cardboard, duct tape, and adhesive "...