All Questions
Tagged with ltspice transformer
51
questions
1
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0
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65
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Transformer Model LTspice - Flyback Voltage Clamped on Primary but Still Present on Secondary Side
I'm simulating a circuit in LTspice using a pulse transformer to drive a JFET gate. The circuit is supposed to work as follows: We drive M1 (N channel FET) to pulse current from a 20V source through a ...
- 21
2
votes
3
answers
288
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How to measure flux in transformer in LTspice?
I wish to check the flux through a transformer core in my LTspice simulation. I have set up a push-pull converter simulation using a transformer with a turns ratio of 1 : 1.1, a supply voltage of 12 V ...
- 22.5k
1
vote
1
answer
231
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LTspice transformer not working as expected
I made this ZVS circuit on LTspice and want to make high voltages with it. The ZVS circuit does work fine and output high power but the transformer I made doesn't work fine. I want x400 step up which ...
user347232
5
votes
3
answers
537
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Bridge rectifier circuit with a step-up transformer
I have been experimenting with a full-wave bridge rectifier in LTspice.
I am trying to step up 120 V AC/60 Hz to 1 kV DC for a load of around 2 kΩ. The step-up transformer has a ratio of 25:9. The ...
- 536
1
vote
0
answers
121
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How to model the workcoil and workpiece in an induction heater?
I'm trying to simulate an induction heater, and I'd first like to start with the load. Sorry if this is a little wordy...
I understand the coil and workpiece are treated as a transformer, where the ...
- 339
1
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1
answer
144
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LTspice transformer and buck converter
I am trying to simulate an efficient circuit to take 120 V AC at 60 Hz and convert it to 5 V, 5 A. I have a transformer and rectifier circuit to get the 120 V down to about 12.6 V DC and I made a buck ...
- 11
0
votes
2
answers
164
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Designing a flyback converter for 12V Input to 120V Output with LT Spice. Are these reverse voltage spikes normal
With this setup, I'm getting some periodic voltage spikes on the primary and secondary inductor (secondary spikes to around 2.7kV). The output shows the constant ~120V I want. Are those voltage spikes ...
1
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0
answers
187
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Question about transient analysis in LTspice
Can anyone explain the function of these three options in transient analysis?
Stop simulating if steady state is detected
Step the load current source
Skip initial operating point solution
I was ...
- 11
0
votes
1
answer
213
views
Why is the LTspice transformer failing to step up?
I am simulating a basic pair of coupled inductors in LTspice. I have a 1HZ 2V peak AC wave on the input. The primary coil is 4uH with 1ohm parasitic resistance and the secondary coil is 20uH with 0ohm ...
1
vote
1
answer
134
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How is there a voltage on the secondary coil when di/dt=0 on the primary coil?
I have made a simple pulse transformer circuit in LTSPICE using a pulse and two coupled inductors. L1 has a resistance of 1 Ω and L2 has a resistance of 0 Ω.
I am having trouble understanding why this ...
0
votes
1
answer
60
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Combine DC sweep with time analysis?
I am working on LTSpice on a project which consists in transferring energy from a PV panel to a load through a transformer, using a controlled bridge at the primary and a diode rectifier at the ...
- 1
1
vote
1
answer
2k
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How to simulate a transformer in LTSpice with custom turns ratio and inductivities?
LTSpice calculates the turns ratio of a transformer with SQRT(Lp/Ls). This is however only true if both windings have the same geometry.
I have an air-core transformer with an Lp of 10μH, an Ls of ...
- 13
3
votes
1
answer
266
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LTspice - Staircase saturation transformer
I am trying to simulate on a full bridge converter a staircase saturation transformer. I was thinking by adding a very little resistor on one leg of the full brigdge converter, it will in any case ...
- 2,478
0
votes
2
answers
409
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LTSpice: weird behaviour when simulating ideal transformers
Theoretically, the following 3 circuits supposed to behave equivalently, in terms of the impedance load to the voltage source at the input:
But to my greatest surprise, the one on the top left shows ...
2
votes
1
answer
313
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How to connect transformer with a full-bridge rectifier in LTspice?
I'm struggling with connecting the transformer to my circuit.
How am I supposed to connect it there? Unfortunately, I am having a floating nodes error.
- 143