I've been working with some motors for the past few days and am getting strange readings with the maximum currents being drawn. It says on the motor that it is supposed to draw "7A continuous". Obviously there is an initial surge, and by my understand this maximum current draw can be calculated by I = V/R where R is simply the resistance of the motor measured with a multimeter.
I would have expected the resistance of the motor to increase as the motor gets hotter (when it has been used for a while), meaning that the max current drawn would decrease. However it seems the opposite is happening with my motors? Measured resistances range from 2.5 ohms to 0.7 ohms. Any thoughts?
I would have expected the resistance of the motor to increase as the motor gets hotter (when it has been used for a while), meaning that the max current drawn would decrease. However it seems the opposite is happening with my motors? Measured resistances range from 2.5 ohms to 0.7 ohms. Any thoughts?