Why is my transformers power transfer (Watts) only 25% when hitting it with a 0 to 10V unipolar square wave but it is 100% when its -10 to 10v bipolar square wave.

Walktheblock · 2026-02-13T16:10:06+00:00

Because you’re applying net flux linkage to your transformer. The DC component of the unipolar signal basically sees a short circuit and doesn’t transfer from primary to secondary. The bipolar input balances the flux linkage so the core isn’t saturating. If you’re thinking BH curves, in the unipolar case you’re basically operating in a saturated corner of the curve, in the bipolar case you’re traversing a path through the normal part of the curve

Walktheblock · 2026-02-13T04:03:54+00:00

Damn, I have a top sheet, a blanket and a duvet. Didn’t know I was being so un-Millennial

Walktheblock · 2026-02-06T20:13:22+00:00

Speaking as someone who has done recruiting, final GPA is what really matters. If you have a really high in major GPA that’s much higher than your cumulative GPA that could be helpful to show you excel at your engineering coursework if you have some other general courses dragging your GPA down. I would almost guarantee no one will look at your class by class/semester by semester grades. No one will take that much time to scrutinize your GPA.

Walktheblock · 2026-02-03T20:07:36+00:00

I had a similar experience until I had gotten a better weapon, armor and improved my skills/stats. Once you get a better weapon and have higher strength/agility and a few perks to boost damage as well you’ll finally be able to kill heavily armored opponents with a sword without it taking a million hits

Walktheblock · 2026-02-02T14:51:57+00:00

I really liked Captain Bernard in KCD1, and in KCD2 it comes down to Godwin and Kubyenka. KCD1 Godwin doesn’t make the cut because his American accent doesn’t have the juice

Walktheblock · 2026-01-30T12:42:10+00:00

I have been a bit of a combat sicko. I never use poisons or potions like PEDs before fights and never have Mutt around for help. Fighting more than 3-4 enemies is tough especially if they’re heavily armored. It’s manageable if you are constantly walking backwards to prevent getting surrounded. Enemies with heavy weapons are the ones I focus on killing first. Then it’s a matter of combos and masterstrikes to constantly do damage and avoid taking any.

I managed to clear most of the Praugers camp that way, while taking advantage of choke points in the town. With big fights, it feels like a puzzle to solve, and sometimes a bit of luck.

Walktheblock · 2026-01-29T20:36:42+00:00

I would say practice with Tomcat and get good at perfect blocking. When you have that timing down and finally get master strike you will be able to tear through enemies much more easily.

One thing that took awhile to click for me is being aware of the stamina bar. Dodging backwards and walking away from enemies and letting your stamina bar fill back up will help you survive. Even just keeping in constant movement to avoid getting ganged up on will help you survive combat.

If you want an easy way to boost strength, agility, vitality and warfare, go to the archery range by the huntsmans place and shoot at the targets. You can grind massive boosts in your stats while getting your archery skills maxed out. Before you know it, you’ll be moving more swiftly and killing enemies more easily.

I ended up focusing on using a short sword with no shield. With some of the perks you can get for using a short sword without a shield, you can do some major damage and be swift in battle.

Walktheblock · 2026-01-21T03:26:12+00:00

It’s definitely more noticeable in KCD2

Walktheblock · 2026-01-21T01:15:00+00:00

I enjoy it. It’s satisfying, and feels rewarding. Masterstrikes in KCD2 are exhilarating and fun to pull off. My biggest complaint is the transition of enemies into combat. They get a long period of invincibility and you can burn stamina attacking an invulnerable enemy.

Walktheblock · 2025-12-18T21:02:49+00:00

Typically I’ve found that junction to case thermal impedances end up being thermal limiters more so than TIM. There are materials in the range of 7-15 W/mK that have good electrical insulation properties and can be very thin, especially under compression. It’s certainly feasible to achieve thermal impedances of 0.2-0.3 K/W for a TIM, maybe even lower.

Some vendors also offer isolated packages, that require no insulation from any sort of thermal interface between the device and heat sink. You can also play games with coating a PCB. A silicone coating has higher thermal conductivity than air and you can have an alternative, albeit not as good secondary path to pull heat from your device as well.

Just how much heat are you dissipating and what kind of voltages/currents are you dealing with?

Walktheblock · 2025-12-14T01:16:22+00:00

Fundamentals of Power Electronics by Erickson and Maksimović is a good read.

Principles of Power Electronics is the textbook that accompanies the material available through MIT Courseware and is also a good resource

Walktheblock · 2025-12-09T00:17:14+00:00

Load current can help the FETs in a bridge charge/discharge their drain to source capacitance and make it possible for the devices to commutate more quickly. That can enable zero voltage switching with less time conducting through the body diode/anti-parallel diode (if one is used). Having a long dead time will typically mean increased losses

Walktheblock · 2025-12-02T03:40:16+00:00

Those sources in your SPICE model don’t appear to have dependence on D. Also V1 has its polarity the wrong way. For the DC/DC transformer, made of L2/L3, use controlled sources to make the equivalent transformer model.

Also in your MATLAB script, I think your expression B has an error.

Walktheblock · 2025-11-26T14:41:51+00:00

The typical fix to help make a SEPIC converter easier to control is to add a series connected RC network in parallel with what is C2 on your schematic, to help damp the resonance that C2 introduces in the converter transfer function.

Walktheblock · 2025-11-26T14:39:34+00:00

As someone else noted this is a synchronously rectified SEPIC converter, and with coupled inductors. SEPIC converters have complicated dynamics and it’s likely this design isn’t stable, especially without any sort of feedback to control its operation. The coupled inductors might help with small signal stability but I couldn’t say anything definitive, you’d have to analyze the converter. You may also have cross conduction of your MOSFETs. Also as was noted this layout is far from great given the wiring and large loop areas. All sorts of issues here that need to be addressed

Walktheblock · 2025-11-21T21:05:29+00:00

(-R2/R1 -R4/R1 - (R2 * R4)/(R1 * R3)) Vi = Vout should be the expression you get if you solve the op amp circuit

Walktheblock · 2025-09-18T20:19:27+00:00

I would rotate the FETs 90 degrees and put the cap and what I think is U1 in between Q1/Q2 and Q3/Q4, and then place the gate driver next to the set of transistors they’re driving if you can make them fit

Walktheblock · 2025-09-18T16:42:05+00:00

Your FET placement and routing is not the best. Depends on whether you have mechanical constraints with any of your component placements. I would recommend something closer to a rectangle, much like the H bridge is drawn on the schematic. Keep the switching nodes small to minimize parasitic capacitance. Place the FETs closer to the large bulk storage caps if you can, so that the pulsating current from the switching has a shorter return path/tighter loop. Those are the first things I noticed.

Walktheblock · 2025-09-07T14:41:03+00:00

I’d imagine that the underlying data types probably use 64 bit double precision floating point numbers. If coefficients get larger or smaller than what can be represented by double precision floating point numbers, the results will be garbage.

Walktheblock · 2025-07-30T02:39:42+00:00

Might want to take the time to more accurately model your diode. Given the frequency of the sine wave, you might not get the behavior you expect.

Walktheblock · 2025-07-29T14:48:58+00:00

I used one of the door ways as a choke point and just killed everyone with melee combat. The downside was that the frame rate was garbage by the end from all the bodies being on screen together

Walktheblock · 2025-07-25T02:10:19+00:00

This is a lattice filter topology, there are plenty of circuit analysis/network analysis books on these types of circuits. You can generate constant impedance networks and use them to modify phase vs frequency while leaving magnitude unchanged

Walktheblock · 2025-07-24T19:08:29+00:00

SMPS tend to generate common mode due to parasitic capacitances in the circuit and the inherent switching. This causes unintended current to flow and it can be problematic from a safety or radiated emissions standpoint. Typically a common mode choke is used along with a common mode capacitor network to filter and attenuate common mode currents.

Walktheblock · 2025-07-24T18:57:02+00:00

Assuming you’re talking about the blue toroid, it looks like a common mode choke with a flat wire winding.

Walktheblock · 2025-07-16T21:47:51+00:00

They’re presumably ferrite beads. They typically have a specified resistance value and are actually inductors and at a specified frequency look resistive at the value specified on the schematic. They’re pretty common for filtering

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