First post and please forgive me if it’s too basic or if it’s in the wrong section. Thanks to all of you for creating such a helpful and informative site.
I have learned a great deal from reading many posts over the last 5 months, but I am embarrassed to admit that I am struggling with the concept of "amps drawn" by a motor. I think I understand how volts can be analogized to pressure in a pipe and that current can be analogized to flow rate through a pipe. From one of Neptronix many informative posts I learned that a "controller limits the current that will come into it. You could hook up a nuclear reactor at full load to your bike and [a 22 amp controller] would still only draw 22 amps." I also have read that a motor "draws" more amps when the motor is dealing with greater resistance, like when you start an ebike without pedaling. .... So should I think of the motor as pulling or sucking the amps out of a battery? But this does not make sense to me because I thought a battery supplies the voltage (pressure) and pushes out the electrons.
jfitz
I have learned a great deal from reading many posts over the last 5 months, but I am embarrassed to admit that I am struggling with the concept of "amps drawn" by a motor. I think I understand how volts can be analogized to pressure in a pipe and that current can be analogized to flow rate through a pipe. From one of Neptronix many informative posts I learned that a "controller limits the current that will come into it. You could hook up a nuclear reactor at full load to your bike and [a 22 amp controller] would still only draw 22 amps." I also have read that a motor "draws" more amps when the motor is dealing with greater resistance, like when you start an ebike without pedaling. .... So should I think of the motor as pulling or sucking the amps out of a battery? But this does not make sense to me because I thought a battery supplies the voltage (pressure) and pushes out the electrons.
jfitz