On 05/01/2014 10:34 AM, Curtis Dutton wrote: > Ok this makes sense. Thanks all for your explanations. I guess I just > wasn't sure what was reasonable behavior and what wasnt. > > So if the motor is rated for 36v, and the drive is rated for 80 volts max. > How much voltage can I get away with delivering to the drives without > damaging equipment? > Most of these motor ratings are figures by what voltage can be applied from a very strong power supply with the motor at standstill, and not cause damage to the motor. A servo amp will be current limited, and will only apply whatever average voltage is required to close the servo loop. So, you should be able to apply quite a bit more voltage to the servo amp than the motor's rating. However, you shouldn't NEED to provide much greater voltage. But, the PWM process and the limits on duty cycle may require 10 - 20% greater voltage if you are running the motor at the rated speed. At 12 m/min, maybe you are spinning it that fast.
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