Questions tagged [inductance]
Inductance is the property by which a change in current in a conductor induces a voltage both in the conductor itself and nearby inductors, the latter being the basis upon which transformers operate. Discrete inductors are also available that have many applications including filtering and energy storage.
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How should we calculate L (inductance) value for a transformer
I am trying to design a transformer using LTSpice with the following specifications:
Vin = 230 V @ 50 Hz
Vout = 12 V @ 50 Hz
Power = 10 W
The thing I do not understand is how to calculate the ...
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Best method to dampen inductive spiking from pulsing coil with MOSFET?
A simple diode works across the coil to lower the voltage spikes, but I ideally need a way to absorb the inductive spiking as fast as possible. I've heard a Zener diode across the drain and source of ...
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Calculation of transformer inductance value
I am trying to find a way to calculate the primary and secondary inductance of transformer.
I learned that it is changing from one topology to another. My topology is Phase-Shifted Full-Bridge ...
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How would you Improve the Smoothness of a 12V DC Motor Drive with Limited PWM Frequency?
I am developing a control system for a 12VDC brushed motor rated at 500W, which is part of a larger project. Currently, I'm using PWM for motor control, but I'm restricted to a maximum frequency of ...
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What is inside of a typical RF transformer?
I am tempted to decap this 500 MHz transformer, but guessing the internals are typical and well-known by experts here.
I don't understand why many companies don't even spec the two windings' DC ...
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LCR Meter U1733C "rn" Symbol Meaning
I have the Keysight U1733C LCR Meter and when I meausure inductance shows me the "rn" letters in front of the Henry units. Do you know what it means (on the manual I found only the SI units -...
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Determining transformer equivalent circuit components
I have made a PCB based planar transformer with a turns-ratio of 8:6. I am considering the T-model as shown below:
In the T-model, Lp is the primary side leakage inductance, Ls' is the secondary side ...
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Energy stored in a saturating inductor
We all know that the energy stored in an ideal inductor is \$E=\frac{1}{2}LI^2\$. However, real inductors with a ferromagnetic core don't have constant inductance. Particularly, when a specific field ...
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Inductance after core saturation
Looking at the datasheets of some drum core inductors, at higher currents the inductance drops significantly due to ferrite core saturation. But it seems inductance asymptotically approaches a value ...
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When increasing the frequency of an induction motor can't I just add a capacitor to maintain torque instead of increasing the voltage?
When increasing the speed of an induction motor if one wants to maintain the same torque, the voltage has to be increased at the same proportion as the frequency of the AC supply.
This is because the ...
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Can PCB trace inductance be reduced by tinning a trace?
I am creating a circuit for a "high current" buck converter (maybe 40 A), and switch node ringing is giving me a headache trying to find solutions. The circuit schematic I'm using is like ...
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Removing turns from a relay coil to make it work on a lower voltage?
I have a piece of machinery that was moved from a building with 240 V to a building with 208 V and all is well but the contactors don't seem to pull in all the way. Could I remove enough turns from ...
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Equivalent inductance seen from a winding
I would be having a little trouble understanding how to do this problem of magnetic circuits. It asks me to calculate the equivalent inductance seen from winding N2. I know how to calculate the ...
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Graph plot of sinusoidal current/voltage vs displacement of speaker membrane from its resting position
For a very long time I believed that the speaker membrane just moves according to the amplitude of a electrical signal fed to it. Like, If at any instant, the current/voltage is at c% (0 <= c <= ...
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Capacitance Formula derivation
Can anyone help me with how this formula came in the first place (marked in red)? I am not able to understand the denominator term.
This is with reference to Double Pulse Test taken from the book : ...
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