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Questions tagged [electric]

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1
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1answer
24 views

How to know if a motorcycle battery and power generator is enough to keep an device turned on without discharging the battery?

I have an arduino project in mind but I have some questions before I can start to make it. I need to plug an arduino Uno on my motorcycle, but I dont know if it will consume too much energy and lower ...
-5
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0answers
39 views

I am doing an 48V Electric Vehicle inverter system [closed]

I am doing an 48V Electric Vehicle inverter system with same i/p and o/p, for this i need to calculate the dc-link and choosen the driver circut can any one help?
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0answers
77 views

Can someone please help me solve these circuits urgent matter for school please help? [closed]

[![enter image description here][2]][2] [2]: https://i.stack.imgur.com/pMrx3.png please help me solve these circuits urgent matter
0
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1answer
37 views

Where does the indicated negative voltage terminal lie on this circuit?

Does the negative voltage terminal lie after the 150v source ?
2
votes
1answer
81 views

How to extract energy from an alternating electric field?

Given an alternating electric field E inside e.g. a big parallel plates capacitor, how can you make use of the field's energy to power an electronic device? So far I thought of putting two smaller ...
1
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0answers
68 views

What is the purpose of feed wire and return wire in electric railway?

Looking at the following image: Image source: The Railway Technical Website On the left of the mast there are two cables, feed wire and return wire. Are they acting like a ground cable which ...
2
votes
1answer
73 views

Supercapacitor electric model

I am doing a dissertation in Electrical and Computer Engineer which involves supercapacitors. I read the norm IEC/EN 62391–1 and the 60384-1 but still I don't have a clear answer for what's the ...
0
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0answers
20 views

Identifying a motor from pinout (electric wheelchair)

hope this is the appropriate place to post. I have been gifted a set of Alber efit e25 add on wheel hubs that convert a normal wheelchair to an electric one. I have non of the control mechanism or ...
0
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1answer
97 views

Capacitors in parallel with Voltage Source

Why can't capacitors be connected in parallel with ideal voltage source. In various questions involving it we were asked to ignore the capacitors, by our teachers without valid explanations.
0
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0answers
14 views

Parameters pmsm

I work on a vehicle system. I use an electric motor block that has the following data. Maximum power [kW] = 85. maximum torque (N.m) = 280. maximum speed [rpm] = 3800. my question is : How to ...
1
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2answers
38 views

Network Theorems on DC and AC

Are network theorems (KVL, KCL, Thevenin, Norton, Superposition, Max Power Transfer) applicable on both DC and AC networks
-1
votes
1answer
112 views

Where do I connect the negative and positive wires on this motor

Pulled a motor from a broken frother and accidently broke the connections and would like to turn it into a hand crank generator for fun Thanks here's a photo Apparently this is a rotor not a motor. ...
0
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1answer
40 views

State estimation in power system [closed]

Regarding state estimation in electrical power grid, does the voltage phasor magnitude at each bus(P-Q bus and P-V bus) considered as a static state variable or a dynamic state? I am a little bit ...
1
vote
1answer
102 views

What will happen if a dependent voltage source in parallel with a dependent current source?

What will happen if a dependent voltage source in parallel with a dependent current source. like dependent voltage source: 4Vx and current source 3Ix in parallel.
-2
votes
1answer
78 views

Electrical panel indicator lights flickering [duplicate]

I'm wondering what the underlying mechanism of the flickering of the panel indicator lights is. Are there electronic oscillators of some kind in there?
2
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2answers
94 views

Current waveform electric motor

Does electric motor reactance at given speed is constant according to rotor position (angle)? For switched reluctance it is not. But for three phase induction motor? Considering there is no any noise....
0
votes
2answers
89 views

Reversing Motor with 2 push button switches [closed]

i wanted to make a schematic to reverse the motor direction with 2 push buttons, and i failed every time to make a schematic like this, when someone can help me would it be helpful thanks.
0
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2answers
80 views

What is the connection of this synchronous motor?

so yeah I took this picture of the terminal box of the synchronous motor we're cleaning. I can't distinguish what is wye or delta when it's shown like this. what are the indications that a connection ...
0
votes
3answers
90 views

Does an AC electric motor with no load consistently draw its maximum power at full RPM's?

Say you have a typical bench AC electric motor rated at 180W which has reached its maximum RPM's. Does the motor always draw 180W when running at full RPM's ? Or does the motor draw less power once ...
0
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0answers
28 views

How to solve “Input is at or under zero output”

Hi I am pretty new to the electric wiring. I am now trying to make a cable to connect the 5 pin connector to the Temperature sensor. The pin-out of the connector is as follow. I ask the manufacture ...
0
votes
2answers
198 views

What determines the voltage of an electric motor?

What determines the operating voltage of an electric motor? And could an AC motor be run at a lower voltage (i.e. 80v) and how? I'm not sure if its the windings turns or thickness of the wires which ...
0
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0answers
70 views

FOC control for AC machines: Difference between (ud,uq) and (id,iq)?

Reading about Field Oriented Control (FOC) for AC machines it is explained that id controls rotormagnetizing flux and iq controls the torque. But is this analogus to the voltage vectors (ud,uq)? Which ...
-2
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3answers
199 views

TT Earthing System [closed]

Ok guys I can't just understand a thing of the TT Earthing System, why on it the ground of the power cabin is connected to the neutral of the power cabin?
0
votes
3answers
74 views

Can 2 9v batteries heat an electric range heating element

For an experiment I am trying to power the heating element in the link attached. http://www.appliancepartspros.com/frigidaire-range-surface-element-316442300-ap4356466.html My goal is to power it ...
0
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0answers
112 views

How do I stop excess PAM8403 distortions?

I have a pam8403 amp that's exactly like this one. It is connected to my raspberry pi zero gpio pin which outputs 8 bit pwm signal for sound. When I play a sound, I can hear it from my 3 watts 8 ohms ...
3
votes
4answers
1k views

I don't understand clearly why the ideal sources that the value doesn't match can't be connected

I'm studying recently Electric Circuits (9th edition) by Nilsson. In Chapter 2, an example bothers me. simulate this circuit – Schematic created using CircuitLab I don't understand why these ...
2
votes
1answer
61 views

Energies of the fields in a plane wave, attenuated and unattenuated

This is a combination of two of my previous questions (question 1 and question 2) which are related. I'm trying to learn both how energy is carried in the electric and magnetic components of a plane ...
0
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2answers
84 views

Energies carried by electric and magnetic fields in plane waves

This is a newbie question. I'm trying to understand what I think must be a very basic concept with an obvious answer, but I want to be sure. Do plane wave electric and magnetic fields of equal ...
0
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3answers
61 views

The electric and magnetic components of far field EMR and shielding thereof

This is a newbie question. I'm pretty sure of the answer, but I would like confirmation. I found this thread in this forum that came close to what I was looking for, but I think my question is ...
0
votes
2answers
127 views

super capacitors for dummies! [closed]

What is the consensus on using super capacitors to power a 500w electric bike motor? Cheap and innovative alternative to li-po batteries, or explosion between thighs waiting to happen? The plan is ...
0
votes
3answers
215 views

Actual electric potential at terminals of battery

I understand that a 9V battery will produce an electrical potential difference/voltage of 9v across the positive and negative terminal, with the positive terminal having the higher potential by ...
0
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4answers
6k views

Electric wiring color codes: BROWN, BLUE and BLACK

31.01.2018 16:40 start / Thank you all for the answers, because this is not a standard wiring plug, i need assistance wiing the wifi adapter in the middle of cable which connect the energy master ...
-4
votes
1answer
40 views

Input voltage drop [closed]

I have a circuit, the characteristic of the load is unknown, most probably resistance and capacitance, the input for the circuit is %v and frequency is varying from 10 Hz to 30 MHz. once the input ...
1
vote
0answers
54 views

Electric Field Vector Question

Hello, would someone please be able to point out my mistake in this question. So I know the electric field has to be zero, so I make sure the x component cancels out and y components cancel each other ...
0
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0answers
34 views

Move ions in electric field against pressure

I am looking for the right equations to get an idea of how strong an electric field has to be if I want to draw ions through an ideal conducting membrane. The problem is that there is a big pressure ...
2
votes
1answer
294 views

Efficient 60v to 12v DC-DC

I'm on the process of building a new version of my ebike electronic systems and I'm searching for a way to lower the voltage of the battery (13s = 54,6v fully charged) to 12v/5v for the accessories ...
0
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2answers
115 views

Calculate work done to remove a electron at the above position from nucleus to infinity

i'm doing this question and I'm at the last part now. The first question wanted me to find out the electric field strength (r= 3.0x10^-10m, q= 9.6x10^-19C) and i used coulombs law and i managed to get ...
0
votes
0answers
97 views

Parallel LC circuit output voltage calculation

An AC voltage generator has an EMF of 100 V, and internal resistance of 1 Mohm. It is connected to the terminals of a parallel resonant (LC) circuit. The capacitor has a value of 100pF and a Q-factor ...
3
votes
1answer
81 views

What could be this particular thermometer used for?

I came across this rather strange looking thermometer. It seems to have two scales and some kind of wires inside it. There are two terminals at the top. Is it a thermostat? But it seems to be too ...