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  1. 120vjohn

    On board ev charger plug in to a dc bus

    What happens if I plug my onboard ev charger designed for 230v ac in to a 300v dc bus, normally it shold work, it not work olny if management electronics do not allow it to work on dc.
  2. 120vjohn

    Sinusoidal PWM modulation types

    There are tho main types of sinusoidal pwm, bipolar spwm and unipolar spwm. for single phase sinusoidal inverter, for there phase only bipolar is available. Both of them can be produced with EG8010/EGS002 ASIC/ APP board (china), via a selection pin, ground unipolar, 5v bipolar, or write it in...
  3. 120vjohn

    Analogic controller/diverter buck topology

    This circuit can serve both as MP-park two stages charge controller or as power diverter, if you want to use surplus energy to heat water or living spaces. It is based on tl494/tl598 pwm controller, two voltage control loops are realized , one for input voltage, the converter starts above the...
  4. 120vjohn

    Hi voltage auxiliary supply build and hack

    An hi voltage auxiliary supply in range of ten watts is useful to power control electronics on a hi voltage PV string. now are available sic mosfets at 1700v and 3300v and sic jfet-s at 1700v. yuo can hack an existing SMPS by cascoding it-s mosfet with a hi voltage silicon carbide sic j-fet and...
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