Danwvw
Active Member
I am open to ideas, certainly worth checking out. The current through the field is less than 10 amps. One critical rating here is the "on ohms" Prototypes 2 & 3 use the Motorola HDT Mosfet which is only 8m Ohms of resistance when turned on. In (prototype 1) I used the IRL540 which had 77m ohms of resistance and it worked ok but the kick in rpm is higher with it.
Just calculated the (+-)15 volt supply loads above But didn't add in gate current. Any idea what that would be at -15 Volt? The leakage current is only 100ua and the gate ohms I think is just for High Frequencies. Not sure. The resistors and the gate diode in the "Prototype 4 Schematic" above use the JFET UJ3N065025K3S limit gate current.
I read somewhere that P channel JFET's are not developed for high current applications. The 6 Volt Generator Regulator circuit needs the load to be on the Drain side. So I used the N-Channel MOSFET.
Just calculated the (+-)15 volt supply loads above But didn't add in gate current. Any idea what that would be at -15 Volt? The leakage current is only 100ua and the gate ohms I think is just for High Frequencies. Not sure. The resistors and the gate diode in the "Prototype 4 Schematic" above use the JFET UJ3N065025K3S limit gate current.
I read somewhere that P channel JFET's are not developed for high current applications. The 6 Volt Generator Regulator circuit needs the load to be on the Drain side. So I used the N-Channel MOSFET.
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