Questions tagged [power-transmission]
The power-transmission tag has no usage guidance.
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questions
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How to know which efficiencies to take into account when calculating power of a certain part of a power transmission system?
I have an example which I am not certain about:
So It consists of a friction wheel, whose power $P_{fw}$ we know. The power is used to power the driven machine $Dm$ on a shaft that lies on 2 bearings,...
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2answers
33 views
How does ferranti effect occur?
I search and read about Ferranti effect online, but none seems to be clear enough for me to understand how it actually happens. I must say, I do not have much prior knowledge about inductive/...
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1answer
37 views
How much aluminum does a HV, MV or LV transmission line use?
I have accurate statistics about the total length of high-voltage (110-400 kV), medium-voltage (1-70 kV) and low-voltage (0-1 kV) transmission lines in my country, and they are:
High-voltage: 22 500 ...
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22 views
Gear ratio comparisson
I have been studying about Torque and gear ration in another discussion Torque and RPM calc, and I received good answers that make me go in-depth into this topic. To understand it better, I want to ...
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3answers
116 views
Torque and RPM calc
started by designing the gear meshing, and now I need to calculate some parameters to determinate if this meshing works for me.
The system considers an electric motor, which technical parameters are: ...
2
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4answers
98 views
Wind turbines with down tower power units. Why aren't they more common?
Concerning the big megawatt wind turbines, if there is such a big trouble with gearbox bearings failing much earlier than expected and costly maintanence or replacement of huge gearboxes, what is ...
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12 views
How to prevent leakage radiation from a grid of inductors laying on a plane?
I am thinking of designing a large wireless charging pad/table.The idea is to have many inductors in a grid setup, where when a phone is placed on the pad/table it starts charging from the inductors ...
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1answer
41 views
Working of spider gear in differential axle wheel mechanism
What causes the spider gear to spin about it's own axis while the vehicle is taking a turn?
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21 views
Can you use a flex (spider) coupler as a dog clutch in a motorbike/atv/go kart/lawn mower like setting?
My question is simple: I want to make a dog clutch system for a wakeboarding cable system and was wondering if a flex (spider) coupler could used? The power, velocity, torque is similar to a go kart /...
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9 views
Can I power a small vehicle with a gamma Stirling engine and hot water?
This amazon page shows a small vehicle powered by a Stirling engine where an open flame heats the hot cylinder.
I am interested in a child-friendly version with a gamma Stirling engine and hot water, ...
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28 views
Power generation in combustion engine
Here's the problem:
On the one end of low-speed engine (driving end) I can measure the torque transformed to mechanical energy. On the other end (free end) I'd like to join power generator with a ...
4
votes
1answer
88 views
What's the history of the 345 kV voltage level in power transmission?
I'm interested in the history of the 345 kV power level for high voltage transmission in the United States. I've got two (and a half) questions:
According to this source 345 kV was first applied in ...
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38 views
Why are there no fully diesel electric cars?
Diesel electric locomotives seem popular, even these days. The UK's Type 45 destroyers have tried integrated electric propulsion, and I think that there are hybrid motor-generator cars that can ...
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1answer
771 views
Linear actuator on a scissor lifting table
I am designing a scissor lifting table and I have an issue with the linear actuator. This table should be lifting 100 kg. I studied the problem in two ways : a static study and a power study. My ...
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1answer
100 views
Equations for power transmitted by a flat belt drive
I've come across two equations that relate power transmitted with the belt tensions:
$$\begin{align}
P &= 10^{-3}(T_1 - T_2)(k)(v) \\
P &= 10^{-3}(T_1 - T_c)(k)(v)
\end{align}$$
As you can ...
2
votes
0answers
77 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 ...
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2answers
795 views
What is meant by “shock load” in gears?
What is meant by shock load in gears?
What are steady, light, medium and heavy shock loads?
29
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4answers
15k views
Transmitting power over long distances what is better AC or DC?
I found this answer to a related question. The part of the answer that's confusing me is:
Transmitting DC power over a long distance is inefficient. Thus AC supply is a far more efficient to ...
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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 ...
3
votes
4answers
144 views
How does power generation (hydro, wind etc…) account for variable power consumption?
I know in a power distribution system, the power is generated (from a dam or turbine or something) and consumed immediately.
But the power consumed is variable. So how does the generation system take ...
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vote
2answers
224 views
Torque Required to Drive Capstan and Bow
I am trying to find the torque exerted on the shaft of a capstan and bow drive. In particular, the system I'm looking at has two wire rope pulleys, and two idler pulleys, and is used to drive a ...
3
votes
3answers
113 views
Why in the construction of power transmission towers , the rods are hinged oblique? [closed]
I know if a rod is hinged at its two ends and if there is no load act upon it along its length then the forces exist only along its length but i don't see how this characteristic comes into play ?
2
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4answers
176 views
Find clutch for parallel hybrid sailboat
I am replacing my dead diesel engine in my sailboat.
I wish to replace it with a new diesel and an electric motor in parallel hybrid.
Hybrid vehicle drivetrain
This would allow me to:
Run the ...
1
vote
1answer
201 views
Faraday cage to reduce EMI in audio amplifier
western United States.
Problem / Question
The bad power in my house is somehow producing EMI in my audio equipment. Will a simple Faraday cage help? (Using an aluminum metal screen)
If not that, ...
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2answers
521 views
Driving many parallel shafts from one motor
Is there a preferred solution to the problem of driving parallel rotary shafts from a single motor?
I have six shafts that I want to drive from one motor. The shafts are all:
rotating the same ...
