If 2 permanent magnet brushed DC motors of the same brand and model are to be coupled shaft-to-shaft to drive a load, what should be done to ensure that they contribute equally to drive the load?
What I am referring to is, in applications I have seen before, the 2 motors were simple electrically paralleled but due to different brush resistances, different lengths of cable run, etc. one motor took the bulk of the electrical power and burned up.
I am trying to prevent that.
1. should they be given the same amount of current or the same amount of voltage?
2. if motor A were to apply less force to the load than motor B, would motor A actually be a burden on motor B, or would it still be helping motor B, but to a lesser extent than it could if it were equal?
What I am referring to is, in applications I have seen before, the 2 motors were simple electrically paralleled but due to different brush resistances, different lengths of cable run, etc. one motor took the bulk of the electrical power and burned up.
I am trying to prevent that.
1. should they be given the same amount of current or the same amount of voltage?
2. if motor A were to apply less force to the load than motor B, would motor A actually be a burden on motor B, or would it still be helping motor B, but to a lesser extent than it could if it were equal?