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Recent content by BradtheRad

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    SCR/ Thyristor Gate driver

    I saw one article telling how it can be and is done with a single brief burst of opposing voltage at the thyristor terminal (current-carrying terminal). This stops current flow through the device by the identical manner which textbooks describe a thyristor shutting off. It's hard to wrap one's...
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    SMPS input filter

    There was a previous thread about this topic. One or more daily experts here stated the capacitor input filter is sufficient in most cases (for real life). Certain power sources (batteries) seem to have slight inductance built in. So usually the resistance in power supply hookups is sufficient...
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    Using IGBT or Mosfet

    Twin interleaved boost converters is another option. This allows a lower saturation rating for inductors. Allows reduced stress on all components.
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    How can I simulate an SMD inductor using CST?

    You may find a CAD-based simulation out there to guide you. One big difference is whether a coil has a core of air or of metal. A metal core attracts and concentrates flux so it's hard to be sure what sort of invisible field extends out of the inductor. My own home-brew simulator might offer...
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    wireless power transfer

    Over a kW...My quick search leads to websites that present wireless charging of industrial batteries. The idea appears legit although power transmission at high levels seems too good to be true. Wireless charging promises so much and is in such huge demand, yet even today we need massive cables...
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    SMPS input filter

    The diagram shows a kind of Pi (π-shape) filter for the incoming DC supply. From seeing discussions I've had the impression CF is there for 'general purposes' in filtering rogue noise or momentary voltage droops. It doesn't interact in a specific manner with neighboring components. Its Farad...
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    wireless power transfer

    The thread says 'Wireless charging', which is suited for small batteries (hearing aid, electric toothbrush). Then there's cabled charging which you're likely to need for vehicles. (Which means this thread may need a different title.) Anyway do you wish to convert a low battery voltage to 48V? Do...
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    SCR/ Thyristor Gate driver

    As I experimented with a triac I planned to make it control speed of a small fan on our wood stove. The usual drive circuit was printed on the Radio Shack package. Possibly the alternate drive circuit containing a neon bulb in place of a diac. I read that thyristors turn on when a sufficient...
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    M2-ATX Power Supply problem

    I had a similar problem with a UPS. (Its internal battery bank was good.) I plugged in an appliance hoping the UPS would startup immediately as a power inverter but it delivered no power. I found the UPS needed to start up powered from mains, and then unplugged. After that it acted as a normal...
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    One way power flow within transformer with low pass filter

    I have a simulation comparing all possible arrangements of AC supply through transformer, with: * rapid switching on either primary or secondary * small inductor on either primary or secondary. The purpose was to observe if a configuration if better at filtering out high frequency to the load...
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    Vintage potentiometer repair: What compound to use?

    'JB Weld' has a line adhesives useful in automotive repairs. Durable. High heat tolerant. Epoxy mix 2 tubes. Even though 'steel' might be on the label I don't think it's electrically conductive but it's a good idea to check what the instructions say.
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    Safety test after repair advice

    To do the tests you describe... Incandescent bulbs have always seemed like the easiest method. Versatile. Predictable. In series they reduce current. In parallel they increase current. Designed to tolerate heat. Give us a visual cue that they're operating. To operate at 360V you can string 2 or...
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    Safety test after repair advice

    An electronics magazine described building a low-ohm test load for a car battery. It was made from several feet of steel band used to wrap around large heavy cargo. To conserve space it could be looped among nails sticking out of a wood board. Sanding painted spots might be necessary to expose...
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    Should i sell my job as a Power Supply company owner?

    * Try to align yourself with the future of whatever field you're in. Is the technology shifting to something else? Is consumer demand shifting the market somewhere else? * What and how much did you invest in your business? I get the impression you're emotionally attached to electronics...
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    How can I connect two pc power supples in parallel?

    Isn't a bridged amplifier mentioned more than once in this thread? It's two amplifiers with the load bridged between their outputs. You may be able to use bridging as a method to give true bipolar AC to the load. There's a difference when we talk about the amplifiers vs. when we talk about the...

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