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.

Filter by
Sorted by
Tagged with
2 votes
2 answers
80 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 ...
Awe Kumar Jha's user avatar
-1 votes
1 answer
63 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\...
Norbert Kts's user avatar
1 vote
0 answers
41 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 ...
Mr Phase Locked Loop's user avatar
1 vote
2 answers
105 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? ...
Samuel Sutphin's user avatar
1 vote
4 answers
216 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 ...
afflux's user avatar
  • 13
2 votes
1 answer
97 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 ...
marcosbc's user avatar
  • 450
0 votes
2 answers
86 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 ...
gagan chopra's user avatar
1 vote
1 answer
80 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 ...
oscar garcia's user avatar
2 votes
1 answer
341 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 ...
ScottyN91's user avatar
1 vote
2 answers
393 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 ...
Mora's user avatar
  • 179
0 votes
2 answers
208 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 ...
Curious me's user avatar
1 vote
0 answers
23 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 ...
thehappywine's user avatar
0 votes
1 answer
93 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 ...
rjpj1998's user avatar
  • 115
0 votes
3 answers
71 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 ...
rjpj1998's user avatar
  • 115
1 vote
3 answers
123 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 ...
Mikayla Eckel Cifrese's user avatar
0 votes
1 answer
81 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 ...
MPA95's user avatar
  • 577
1 vote
1 answer
47 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 ...
kellogs's user avatar
  • 1,072
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 ...
Freshman's user avatar
1 vote
0 answers
45 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 ...
Dev's user avatar
  • 51
-1 votes
1 answer
129 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 ...
Davin Dempster's user avatar
1 vote
1 answer
65 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 ...
Alex Lim's user avatar
0 votes
2 answers
138 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 ...
Ronnie's user avatar
  • 328
0 votes
1 answer
55 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 ...
dahaha's user avatar
  • 5
0 votes
1 answer
59 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 ...
cvcv's user avatar
  • 17
0 votes
1 answer
47 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(...
hideinink's user avatar
0 votes
0 answers
111 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 ...
Dev's user avatar
  • 51
1 vote
0 answers
64 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? ...
Unknown123's user avatar
1 vote
2 answers
71 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 ...
ritvik rathore's user avatar
3 votes
1 answer
63 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 ...
jdavis's user avatar
  • 31
0 votes
0 answers
115 views

Protecting a Schottky diode against negative spikes greater than its specified V_rrm

It appears this can be made to work, but I am not sure how. Related: Protection against transient voltage spikes regarding ISO7637-1/2: TVS diode with Schottky diode suitable? or a 40V schottky plus ...
kellogs's user avatar
  • 1,072
4 votes
5 answers
389 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 ...
gtetil's user avatar
  • 401
0 votes
1 answer
55 views

Automotive transients: which rail goes how?

Presumably it would depend on each transient http://www.sft-lab.com.cn/uploads/ISO_16750-2-2010.pdf http://sft-lab.com/uploads/ISO7637-2-2011.pdf Or is there a more general rule - i.e. when a -100V ...
kellogs's user avatar
  • 1,072
1 vote
0 answers
195 views

Specifying a TVS to protect against inductive spikes

I'm choosing a transient voltage suppressor to absorb the freewheeling current from a 1mH inductor in the rare situation the output of a SMPS is disconnected during load. simulate this circuit –...
James Fotherby's user avatar
0 votes
1 answer
77 views

When finding ESR/ESL of a ceramic capacitor, what frequency should I assume during a load step?

I want to determine the output droop in a transient load step for a buck converter I am designing. The output capacitor will supply current during this load step, and there will be a drop associated ...
MaxwellEE's user avatar
  • 346
2 votes
1 answer
190 views

EFT generator circuit

I am simulating a circuit to model the EN 61000-4-4 waveform for electrical fast transients using LTspice. The idea is to have the generator for some in house testing. After a lot of back and fourth ...
Dimitar Zhekov's user avatar
0 votes
1 answer
131 views

Electrical fast transient waveform (switching circuit) load

I am simulating a circuit to model the EN 61000-4-4 waveform for electrical fast transients using LTspice. The idea is to have the generator for some in house testing. Here is an old question I have ...
Dimitar Zhekov's user avatar
0 votes
2 answers
120 views

Transient response for frequency dependent components [closed]

For a circuit consisting of R, L and C components, the component C is frequency dependent i.e. it's value depends on the operating frequency. I want to get a transient response for this system but not ...
ritvik rathore's user avatar
0 votes
0 answers
54 views

Transient response

I am not able to conclude on how frequency of input signal impacts its transient response? For a given system, if my input signal is having multiple frequencies (e.g. step input), is the transient ...
ritvik rathore's user avatar
0 votes
1 answer
100 views

Current amplitude of an Electrical Fast Transient

I am trying to build my own EFT generator as close as I can to (IEC 610000-4-4). In order to achieve that I need to figure out the parameters of the waveforms that need to be produced. I am at a stage ...
Dimitar Zhekov's user avatar
0 votes
0 answers
30 views

Estimate transient power of crowbar circuit

I am designing a crowbar circuit and for this circuit it is important that the maximal transient energy that goes through the circuit before the fuse trips stays below a certain limit. The setup of ...
luukito's user avatar
  • 21
0 votes
2 answers
70 views

Discharge of steady state inductor

What happens to the energy stored in an inductor when it is discharged after it reaches steady state? In transient state analysis, the voltage in the inductor changes its polarity when discharged and ...
cvcv's user avatar
  • 17
0 votes
0 answers
37 views

Why is the duration of my transient simulation dictating my settling time in Pspice?

I am doing a step response analysis of a Sallen-Key 2nd order filter. However, I find that the settling time given to me by Pspice using SettlingTime(V(Vout),2%) changes if I change the transient ...
Efanatic's user avatar
  • 113
1 vote
1 answer
378 views

Small signal model of buck converter

I want to find the transient response of an open loop buck converter for a step change in load current. To obtain the output impedance Zo = vo/io, which would help me to find the transient response of ...
ritvik rathore's user avatar
0 votes
1 answer
112 views

Circuit analysis (transient state) of a circuit with inductors and capacitors

I am trying to perform transient state circuit analysis for the following circuit and find the voltages across the inductors: I was using the superposition principle. I started by turning voltage ...
Salman's user avatar
  • 1
2 votes
1 answer
316 views

Buck converter load current step response

I am analyzing output voltage transient response of a buck converter for a step change in load current. From small signal model, the transfer function \$\frac{v_o}{i_o}\$ is derived as below (...
ritvik rathore's user avatar
0 votes
0 answers
91 views

How to accurately simulate a transient Response for a RC circuit with Initial Conditions

I am trying to simulate this circuit with the specified initial condition voltages. If I don't include the parallel R10, I get a Floating Node Error at Vout and have to include it. When I do include ...
Efanatic's user avatar
  • 113
1 vote
0 answers
53 views

How to model a single-pole, triple-throw switch in PSpice?

I would like to model the following circuit in PSpice: It is a single-pole, triple-throw switch implementation. I have tried to model it using Sbreak like below, however, I get a floating node error. ...
Efanatic's user avatar
  • 113
1 vote
1 answer
237 views

Smart and Variable time step Micro-cap 12

I need to perform a transient analysis with the Micro-Cap software that gives me information about what happens in microseconds but also in hundreds of seconds. Currently, I am doing several analyses ...
Theiden's user avatar
  • 81
2 votes
2 answers
1k views

Circuit simulation for electrical fast transient generator

I am simulating a circuit using LTspice. It is a circuit that I am trying to model after the EN 61000-4-4 waveform for electrical fast transients. The idea is to have the generator for some in house ...
Dimitar Zhekov's user avatar
0 votes
0 answers
80 views

In-house electrical fast transients (EFT) test

I am trying to simulate electrical fast transients (EFT) in order to see if our device is compliant. I am aware that the test that I am conducting is not the most accurate; since we are still in the ...
Dimitar Zhekov's user avatar

1
2 3 4 5
8