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Recent content by summitville

  1. S

    Does it exist an AC to AC converter in small package for converting 220v to 110v?

    No, the turn-on phase angle, for equivalent 120 V rms, will be small enough that 220x1.414 will never be applied to the motor.
  2. S

    Does it exist an AC to AC converter in small package for converting 220v to 110v?

    If you know, then tell us exactly what percentage of the normal-life will be lost be using a Solid State Speed controller set to 50% power?
  3. S

    Transformer and alternator

    From time 45:33 until 46:08 in your You-Tube video, the armature is spinning but the Arrows are not changing direction. That is very wrong & very misleading. Finally, at time 46:09, the video shows an actual Voltage reversal. Initially, I was only answering your question regrading your...
  4. S

    Transformer and alternator

    OK, I see now that it is not a commutator but two slip rings = AC generator. Initially, the video does not show the alternating current - which is wrong and very confusing! Finally at time 46:43, the video does show that the current flips to the opposite direction, once every 180° = once per N-S...
  5. S

    Transformer and alternator

    That You-Tube video is of a DC Generator, not an AC Alternator with magnets on the rotor. In an AC Alternator ... as the North Pole is leaving the stator coil, the following South Pole is simultaneously approaching the coil. A N-S pair passes the coil, then a S-N pair passes the coil, then a...
  6. S

    Transformer and alternator

    Since there appears to be no answer, I will try ... I will start with - I disagree with your above assumption. AC Alternator ... When the North Pole of the rotor passes by the coil, the motion is always in one direction - the rotation of the rotor. Causing the "+" half cycle voltage in the...
  7. S

    Does it exist an AC to AC converter in small package for converting 220v to 110v?

    What if you installed a wall mounted electronic 230 Volt Variable Speed Fan Controller inside the J-box? And then permanently set the output to 50% Power? Something like this ... SPEED_CONTROLLER In this model, I do not like that "OFF" goes directly to "HIGH", instead of "OFF" to "LOW". Does...
  8. S

    H-bridge 100khz recommendations

    Can you post the schematic diagram of your circuit ? You can you use ... a) A Full H-Bridge or b) A Half H-Bridge or c) A single MOSFET Are you designing a LC Resonant circuit? This example pre-built device, does come with a 12 Volt 700ma (output) option. Wireless-Charging Some units are...
  9. S

    How to implement timer to read sensor signal periodically without MCU

    Your Truth Table looks like a D-Latch D-LATCH
  10. S

    hbridge control from mcu

    On further thought ... The passive Diode does not allow for +5 Arduino and 12 volts on the Gate. So use a transistor, a mosfet or a gate driver - your choice Also consider, a) Minimum Dead-Time b) Gate drive current The Arduino forum has many threads regarding H-Bridges.
  11. S

    hbridge control from mcu

    Use a diode, a transistor, a mosfet or a gate driver - your choice
  12. S

    can boost converters cause gate loop ringing

    PIN #1 (SW) of the MT3608 is a Low Active MOSFET only, it does not source any current - it is not a Gate Driver - it is the "PWM switch". I assume you are trying to add an external MOSFET? Please, post a schematic. And then clearly explain ... How you are going to use the MT3608 to Source...
  13. S

    Trying to build an LED Driver which will run with Vehicle Battery

    He is saying, the current design is 4 LED'S in series per string at 1 amp Then ... 4 strings = 4 amps 8 strings = 8 amps 16 strings = 16 amps The design can be changed from 4 LED's in series per string, to 3 LED's in series per string, to allow more overhead voltage. But then 33% more "3 LED"...
  14. S

    [SOLVED] Are there relays made for inductive loads

    Yes, there are Solid State Relays mfr by CRYDOM, that are specifically design and rated for highly inductive loads.
  15. S

    Switching Solar Panels in Series and Parallel

    Good luck finding an "inexpensive" relay with contacts that are rate at 250 Volts DC at 10 Amps. A relay with contacts that are "AC Rated" only, will not work. Why not just leave the panels always connected as "6S" and use a "250 Volt Input to 48 Volt @ 30 Amp output" MPPT Charge Controller...

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