Hi all,
We are using stepper motor from sanyodenki (SH2863-5141) for one of our projects. Also we are using Stepper motor drive from US Digital (MD2S-P)
[www.usdigital.com]
If we see the motor datasheet its resistance is 1ohm and rated current is 4A, so that the consumed power is P =I2R = 16W. So if we power the driver with a 48V supply the motor is taking almost I= 16/48 = 0.33A which i can see directly from the power supply(the power supply will show how much current the circuit draws). Upto this everything is ok(Standstill). But when we start rotating the motor the current increases. If we keep on increasing the speed, current increases to a point from where it starts decreasing.
The drive manufacturers says that the drive wont allow more than rated current to flow through the motor windings . Then where does this excess current flow?. Can anyone tell me why the current increases if we increase the speed and then it decreases after a certain speed. Is it because of the drive? Whats the physics behind increase in current when we increase the speed.
We are using stepper motor from sanyodenki (SH2863-5141) for one of our projects. Also we are using Stepper motor drive from US Digital (MD2S-P)
[www.usdigital.com]
If we see the motor datasheet its resistance is 1ohm and rated current is 4A, so that the consumed power is P =I2R = 16W. So if we power the driver with a 48V supply the motor is taking almost I= 16/48 = 0.33A which i can see directly from the power supply(the power supply will show how much current the circuit draws). Upto this everything is ok(Standstill). But when we start rotating the motor the current increases. If we keep on increasing the speed, current increases to a point from where it starts decreasing.
The drive manufacturers says that the drive wont allow more than rated current to flow through the motor windings . Then where does this excess current flow?. Can anyone tell me why the current increases if we increase the speed and then it decreases after a certain speed. Is it because of the drive? Whats the physics behind increase in current when we increase the speed.