I couldn't sleep this morning so as I made the wife coffee, I was pondering the 3BGS and thought I would share something. I have repeated the story many times of how, when my original device "came to life" after 15 minutes, I immediately put a meter on battery three.
What I saw was that it would read 24 volts, go slowly down to 18 IN JUST A MATTER OF MINUTES, at which point the motor would start, and it would continue to run as the voltage continued to drop down to around 8 or 9 volts, at which point the motor would shut off.
The voltage would immediately jump to 24 volts and the process would repeat over and over.
so here is my take on it -
What I saw was that it would read 24 volts,
Bat 3 is high impedance so there is no current flow to drop voltage over the motor so the supply voltage is being totally transferred to bat 3
go slowly down to 18 IN JUST A MATTER OF MINUTES,
The only way the voltage here can fall below the supply voltage (24v) is by a current flow into bat3 causing a volt drop across the motor. (24-18 = 6v across motor)
at which point the motor would start,and it would continue to run as the voltage continued to drop down to around 8 or 9 volts,at which point the motor would shut off. The voltage would immediately jump to 24 volts and the process would repeat over and over.
What I saw was that it would read 24 volts, go slowly down to 18 IN JUST A MATTER OF MINUTES, at which point the motor would start, and it would continue to run as the voltage continued to drop down to around 8 or 9 volts, at which point the motor would shut off.
The voltage would immediately jump to 24 volts and the process would repeat over and over.
so here is my take on it -
What I saw was that it would read 24 volts,
Bat 3 is high impedance so there is no current flow to drop voltage over the motor so the supply voltage is being totally transferred to bat 3
go slowly down to 18 IN JUST A MATTER OF MINUTES,
The only way the voltage here can fall below the supply voltage (24v) is by a current flow into bat3 causing a volt drop across the motor. (24-18 = 6v across motor)
at which point the motor would start,and it would continue to run as the voltage continued to drop down to around 8 or 9 volts,at which point the motor would shut off. The voltage would immediately jump to 24 volts and the process would repeat over and over.
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