Questions tagged [transient]
A change in an electrical system from an equilibrium or steady state. The response of the electrical system to a transient is its transient response. Examples of transients include load transients (in which the load suddenly changes) and line transients (in which the input voltage of an electrical system suddenly changes). The electrical system may require protection from certain transients, e.g. by using transient-voltage-suppression (TVS) diodes.
397 questions
0
votes
1
answer
54
views
Transient Analysis on Variable Resistance
The solution of the following question is given by applying KVL across the loop and then proceeding accordingly.
But why isn't the general equation of transient analysis applicable here? The equation ...
0
votes
1
answer
39
views
Max voltage of a varistor
I am currently investigating the EN 61010 standard. I have to protect my circuit for transient overvoltages in CAT 3. This results in impulse withstand voltage peaks of 4 kV on the mains supply.
I ...
0
votes
1
answer
79
views
TINA AC Transfer Characteristic and Transient sims give different results
I have the following active filter circuit:
I found this design in a book and it should have the following parameters:
center freq: 1 kHz
Q = 40
gain: 16 dB @ 1 kHz (on OUT1)
As the AC transfer ...
- 65
1
vote
3
answers
162
views
Feasibility of methods for nodal analysis of a complex RC circuit network
<Circuit 1>
simulate this circuit – Schematic created using CircuitLab
I need to perform nodal analysis on the <Circuit 1> and much larger lattice RC circuits. The resistance and ...
- 13
0
votes
2
answers
91
views
Nodal analysis with inverse Laplace transform of a simple RC circuit with an AC voltage source gone wrong?
simulate this circuit – Schematic created using CircuitLab
This is a simple RC circuit with an AC voltage source, \$E = V_0 \cos(\omega t)\$. In the sinusoidal state, \$Y_{\text{resistor}} = G\$ ...
- 13
3
votes
2
answers
99
views
How can i analyze the transient response of a circuit?
I have recently become interested in electronic circuit design and transient analysis of these circuits. Unfortunately, throughout my university life, we have only studied the analysis of RLC circuits ...
0
votes
1
answer
54
views
Charge on a capacitor in a RC circuit [closed]
I have been given this problem in which one capacitor is initially charged to some voltage and then connected with another uncharged capacitor and resistor as shown in the figure. I am trying to find ...
- 45
1
vote
2
answers
65
views
How to correctly indicate reponse time of a power supply
I want to draw something to indicate the response time of a power supply to a change on the load side. Here is what I came up with and I want to ask if it is the correct interpretation:
Does the ...
- 815
2
votes
3
answers
107
views
Transient analysis of first order circuit
For the attached problem, I am getting the signs wrong.Here I have considered the inductor voltage signs as such because after closing the switch, less current would flow through the inductor but ...
- 45
0
votes
0
answers
55
views
Explination for arcing noise coming from protected power tap devices?
For years now there has been a random occurrence that happens with seemingly any power tap device I have with protection circuitry in it where it will make a audible buzzing/arcing sound for a few ...
- 101
2
votes
1
answer
94
views
Implementation of Circuit in AN104 for Load Transient Test
I have been testing the transient response of line regulator simply with a MOS and the resistor, this method, however, cannot generate arbitrary current and the current is not accurate. To improve the ...
- 23
3
votes
3
answers
186
views
What happens when you insert an inductor between Vcc and a MOSFET's drain?
Inserting an inductor in between Vcc and a MOSFET's drains can cause some very large voltage spikes, depending on the exact inductor value:
I'm having trouble analyzing it properly, though. For some ...
- 1,347
1
vote
1
answer
96
views
Is there any issue when mixing low frequency power with high frequency digital in a single board? [closed]
Summary
In a board is it okay to just join low frequency power(>10 Hz, 1-15 A, 24 V) with “high” frequencies(~100-480 MHz), being supplied by “different” power supplies but referenced with the same ...
- 317
1
vote
0
answers
31
views
Cannot get correct output in PSpice with the Buck Converter PSpice Transient Model from TI
I obtained the LM76005-Q1 transient model from the Texas Instrument website and imported it to PSpice. The website also provides a Design Calculator software, so I basically use it to determine other ...
1
vote
2
answers
130
views
Transient circuit analysis with additional source
The circuit in the image below is what I get when I open the switch of a larger circuit which I have already analysed. Therefore, I know the initial condition.
simulate this circuit – Schematic ...
- 147
0
votes
0
answers
18
views
Standards/Insight into Transient Protection of Industrial/Construction Equipment
I am designing a device that will be connected to the 12 or 24V battery of certain construction and industrial equipment. I'm aware that because these are industrial vehicles/equipment we will need ...
- 43
0
votes
1
answer
49
views
EFT on powersupply AC input
My system I use 110 V to 36 V power brick (medical grade), and having hybrid cable which takes this 36 V and Ethernet and goes to the system.
I am testing the EFT as per 61000-4-4 (± 2 kV, 100 kHz ...
- 137
0
votes
5
answers
240
views
Is there an equation to calculate the voltage spike caused by an inductor in the absence of a freewheeling diode?
I am using a 50V DC power supply to supply an inductive load of 10mH (any kind of inductive load.) I am using a MOSFET as a low side switch.
If I do not use a freewheeling diode to discharge the ...
1
vote
1
answer
95
views
Hard time to understand building 250 V HV from 3.3 V and problem with transformer
I have built PicoEMP device ( https://github.com/newaetech/chipshouter-picoemp ) device which diagram I'm attaching:
It's basic role is to built ~250 V voltage from 3.3V GPIO and release it through ...
- 11
2
votes
2
answers
119
views
Transient analysis in presence of faults
While reading Shenkman's Transient Analysis of Electric Power Circuits I came across the following problem:
... This circuit represents the equivalent of a d.c. supply network. At the instant of time
...
- 165
-1
votes
1
answer
75
views
Calculate the inductance voltage from its current time function
I have a solution for the following exercise, but I'm not sure if it's a good one.
This is the current time function of the inductance:
$$i(t) = 2-2e^{-t/T}\text{ (A)}$$
$$L = 10\text{ mH}$$
$$T = 2\...
- 15
1
vote
0
answers
47
views
Control engineering: how to design a system for desired impulse response
I've designed a system to get a desirable step response. However, I think the impulse response of my system is more important.
There are many methods for designing a system for transient response ...
1
vote
2
answers
110
views
Need help understanding transient inductive networks
When the circuit is in the storage phase is R2 shorted? My professor's PowerPoint shows R2 going away when the switch is connected to the circuit. Why is this? Will this be the same if R1 > R2? ...
1
vote
4
answers
446
views
Voltage spikes on switch-mode power supply Vout when disconnecting barrel jack
I have a fairly simple circuit that uses a DC/DC converter (Traco TSR 1-2450E) to generate 5V for my microcontroller board (D1 mini or similar) from a 12V wall wart. I used the TSR 1-2450E because I ...
- 13
2
votes
1
answer
133
views
TVS Diode Transient Response to Surge and Current
I want to simulate the transient voltage response of a TVS Diode against a surge using an exponential voltage source with this characteristics:
Initial value 0V
Pulsed value 100V
Rise delay time 0s
...
- 476
0
votes
2
answers
174
views
Step response v/s DC voltage
I have to find step response for this circuit considering my input as Vo and step for Vin( I am using Simulink for this)
Firstly what i did was making this circuit (DC voltage is 1V)
The response on ...
2
votes
1
answer
207
views
How to avoid transient voltage spikes when powering up a device?
I'm using the linear regulator LP2985-50 from TI to power a set of op amps (NE5532). The op amps provide an analog signal to a component that is very sensitive to overvoltages.
Upon power up, I first ...
- 53
2
votes
1
answer
710
views
How to determine the maximum safe turn on/off time for a mosfet?
Background
I have been considering using the VOM1271 photovoltaic gate driver with an N-channel mosfet to do simple on/off (no PWM) high-side switching of circuits up to 84V (previous question for ...
- 55
1
vote
2
answers
512
views
Energy in capacitor paradox
Recently I have been thinking about a circuits problem that caused me a lot of confusion.
First of all we know from thermodynamics that energy is conserved. I wanted to show a problem that seemed to ...
- 179
0
votes
2
answers
444
views
Inductor in DC circuits
I've been studying about inductors lately, so I'm going to tell you how inductors work based on what I understood, please correct me if I'm wrong.
As soon as the switch is closed (in a DC circuit with ...
1
vote
0
answers
26
views
What the correct way to find the transient equation of the latch circuit given below [duplicate]
So i have question i have found the transfer function for the of the given latch circuit, now i want to find the transient equation of the given transfer function, now i think the way i did this is ...
- 11
0
votes
1
answer
107
views
Transient analysis with charged and uncharged inductor in series
I have to do transient analysis in the following circuit.
When t<0.
L2 inductor is effectively bypassed and 10A flows through inductor L1.
At t = 0+
L1 behaves as a current source outputting 10A ...
- 115
0
votes
3
answers
113
views
What's the potential difference across gap a and gab b
My book insists that the gap across a and b is the same, i.e 33.33V.
But I made the circuit in a simulator and the simulator says the difference across gap a is 66.66V and the difference across gap b ...
- 115
1
vote
3
answers
217
views
Transient response of capacitor connected to current source with no resistor
I have this HW problem:
It has me completely stumped because the usual equation for the transient response of a capacitor assumes the circuit has a voltage source, not a current source, and requires ...
0
votes
1
answer
138
views
First order RC highpass filter input capacitance
I'm trying to find the capacitive load repreented by an RC first order highpass filter.
Intuitively, I tend to believe the load will not be the C series capacitance, since the capacitor is not being ...
- 587
1
vote
1
answer
55
views
51 V clamp on load dump; will this IC survive?
This is about the Texas Instruments TPS2HB50-Q1 40-V, 50-mΩ Dual-Channel Smart High-Side Switch.
Vbb is the battery (suppy) voltage
Page 7 gives a VbbCLAMP > 58V
...
- 1,061
0
votes
0
answers
56
views
Question of Ethernet PoE and TVS protection [duplicate]
My question is based on this question over here
Asking this question here since I didn't receive a clear answer that clarified my confusions on TVS for PoE applications.
As far as I understand, the ...
- 945
1
vote
0
answers
48
views
Compact Matrix representation for duplicate eigen values
For a diagonal matrix with diagonal elements equal to eigen values, I am interested to further use this matrix to carry out transient analysis using a numerical method (trapezoidal rule).
There are ...
- 61
-1
votes
1
answer
197
views
Transient analysis of the low pass RC filter
I have designed a low pass RC filter and trying to simulate using transient analysis. I can't figure out the magnitude of the input and output waveform. What's the time delay between the input and ...
1
vote
1
answer
74
views
Laplace transform of multiple sources in a circuit
I came across this circuit and couldn't solve it. From what I know the Laplace transform of a DC source would be the constant divided by the \$s\$ variable. However, does this only applies to sources ...
- 11
0
votes
2
answers
145
views
RC circuit simulation
I am trying to analyse a simple circuit of series-parallel RC in LTspice .
V1 is a voltage source ramping from 0V to 10V in 1 second.
I am expecting to see the constant current in C2 and C1 since ...
- 328
0
votes
1
answer
65
views
Transient current consumption of an opamp
How to select a voltage converter for a chip based on its input current? I know, that I should look for Isup in the datasheet. But what about pulse current?
For example I have OPA4180 (four-channel op ...
- 5
0
votes
1
answer
69
views
What is the capacitor charging equation for this circuit [closed]
The capacitor is charged to 20 V at time=0. Now it is connected to a battery of 80 V. What will be the charging equation. If the terminal are reversed it will be the discharging of capacitor-charging ...
- 27
0
votes
1
answer
74
views
How could we predict the transient response of the multi-loop circuit?
Typically, when analysis the stability of a single loop circuit, we can use the open-loop method, just to break the loop and get the loop gain. Then, using the Bode diagram, we can easily get the PM(...
0
votes
0
answers
167
views
Output capacitor selection for buck transient response
I am trying to select an output capacitor for an open loop buck converter to meet undershoot and overshoot requirements for a step change in load current.
Below is the equation to find the output ...
- 61
1
vote
0
answers
70
views
How to separate Transient and Steady-State Expression from Periodic Summation Response?
Background
My question comes from here, it's a response of 1st order LPF RC circuit from an arbitrary periodic input.
How to determine the transient response of a circuit to causal periodic inputs?
...
- 844
1
vote
2
answers
84
views
Buck converter with input network
I am trying to simulate a Buck converter for load transient with and without input filter for duty ratio of 0.5, as shown below in LT SPICE. The output voltage transient is almost same for both the ...
- 339
1
vote
1
answer
137
views
Testing Ethernet POE and surge\transients from other sources like lightning
I've got a POE Powered Device (PD) that I would like to make sure the surge protection is functioning in the event of a surge that it doesn't take down my device. How could I test for surge\transient ...
- 88.8k
3
votes
1
answer
94
views
Transient Negative voltage on NMOS causing channel to open?
This is my first post here. I am an electrical engineer looking to cure my madness because a 2N7002 NMOS is doing things I cannot explain. If you look into the attachments, you will see some screen ...
- 31
4
votes
5
answers
686
views
Why do these INA240 current shunt amplifiers keep failing?
We have over 100 current shunt amplifiers (Texas Instruments INA240A2-Q1 and INA240A3-Q1) monitoring durability testing of brushed DC motors (more specifically, fuel pumps). On our test boards, there ...
- 401