The H-Bridge module shown has a total of 20 pins (with 2 extra for thermistors), and is required to facilitate low frequency switching of polarity (~4 Hz only) in an array of electromagnets to enable a rotating magnetic field. I am untrained in electronics and having simply acquired this module on spec, now realise that, although I can see the basic circuitry of the H-Bridge, it appears unnecessarily sophisticated for the simple task at hand.
For example, there are 4 DC [--] input pins and 4 DC [+] output pins, and I was hoping that someone here could explain why any more than one of each is necessary. At the same time, there are 2 sets of pins labeled 'ph' to which a motor or electromagnet may be connected, so it seems that this H-Bridge is designed to allow the simultaneous operation of two circuits. However, there are only 4 gate pins (and ?4 source pins), so a fairly complicated MCU would be necessary to orchestrate such a circuit.
So, presuming that the basic H-Bridge involves 2 pairs of IGBTs, [T14 -ph2-ph1-T11] and [T12-ph1-ph2-T13] requiring only single DC-2 [--] and DC-1 [--] in-pins as ground respectively, is it sufficient to use two of the four DC [+] out-pins, and, for the simple switching of polarity required, to open and close these pairs by controlling the voltage across their respective G-S pins (~5V)? The module is rated for 75 A/650 V which is more than sufficient for the application using 12 V car battery to the electromagnets through this switch.
(By the way, it is late at night where I am, so if I'm a little tardy in replying to any answers or suggestions, please bear with me. My apologies if more clarity or information is required).
For example, there are 4 DC [--] input pins and 4 DC [+] output pins, and I was hoping that someone here could explain why any more than one of each is necessary. At the same time, there are 2 sets of pins labeled 'ph' to which a motor or electromagnet may be connected, so it seems that this H-Bridge is designed to allow the simultaneous operation of two circuits. However, there are only 4 gate pins (and ?4 source pins), so a fairly complicated MCU would be necessary to orchestrate such a circuit.
So, presuming that the basic H-Bridge involves 2 pairs of IGBTs, [T14 -ph2-ph1-T11] and [T12-ph1-ph2-T13] requiring only single DC-2 [--] and DC-1 [--] in-pins as ground respectively, is it sufficient to use two of the four DC [+] out-pins, and, for the simple switching of polarity required, to open and close these pairs by controlling the voltage across their respective G-S pins (~5V)? The module is rated for 75 A/650 V which is more than sufficient for the application using 12 V car battery to the electromagnets through this switch.
(By the way, it is late at night where I am, so if I'm a little tardy in replying to any answers or suggestions, please bear with me. My apologies if more clarity or information is required).
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