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AC Active Soft Starter for Inductive Load with less energy dissipation

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BravoV:
I'm back, apologize for the late update as bread & butter matter took over my fun times.  :-DD

As this working with lethal voltage, I'm in the middle of building the prototype, even its very simple circuit, to accommodate easy yet as safe as possible for measurements, and maybe for upcoming minor tweaks/changes if needed. And possibly Duak's version too.

For basic measurements to capture the initial turn on condition, attached below is my initial setup plan, is this suffice ?

A DSO will be used in Single-Shot mode, still thinking about the triggering setup.

Appreciate any comment/feedback regarding this setup arrangement if any, thanks in advance.

duak:
I would think that the relay coil voltage would be a valuable bit of information.  I would also do the first few tests with an incandescant lamp in series to limit current in case of faults.  Something like 20 - 60 W at the line voltage.

Cheers,

BravoV:

--- Quote from: duak on January 16, 2019, 05:58:03 am ---I would think that the relay coil voltage would be a valuable bit of information.  I would also do the first few tests with an incandescant lamp in series to limit current in case of faults.  Something like 20 - 60 W at the line voltage.

Cheers,

--- End quote ---

Thanks for reminding of using incandescent lamp in series, forgot it, will put it in the prototype.  :-+

Specifically about my relay, its Omron model LY2 series, with coil rating at 220/240 AC, and according to it's datasheet, absolute maximum coil voltage is at 110% of rated voltage, or 240VAC x 110% = 504VAC.

Just fyi -> Omron LY datasheet (PDF)

duak:
BravoV, I think 100% of 240 VAC is 264 V.

Cheers,

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