Difference between revisions of "Argon user guide/Motor compatibility"

Revision as of 21:51, 9 August 2013

This is a short guide for determining whether or not a motor is suitable for Argon.

Motor type must be one of the following (rotary or linear):

• Permanent magnet brushed DC
• Permanent magnet brushless DC (BLDC) (magnetic pole count 2 to 100)
• Permanent magnet AC (magnetic pole count 2 to 100)

Servomotors must be equipped with an compatible Feedback devices. If motor is equipped with encoder, following types are compatible:

• Encoder voltage 5V
• Outputs single ended or differential
• 2 channel encoder is enough for all motor types
• Suitable encoder resolutions are from about 100 PPR to 131070 PPR (pulses or lines per revolution)
• Index channel is not required but is supported for precise homing
• Hall or commutation sensors are not required but are supported for AC/BLDC motors

Motor voltages and currents can introduce some limitations to motor output speed and torque but will not cause unsuitability.

• Motor voltage is the limiting factor for maximum speed. For example, if you have a 200 VDC brushed DC servo motor and run it at 115 VAC using Argon, then you can expect to get a speed of 115*1.41*88%*/200V = 71% of motor's rated speed. 88% comes from Argon's effective voltage swing at power outputs (see Argon specifications).
• Motor current is the limiting factor for maximum torque. For example, if you have motor rated for 20A DC and drive's maximum output is 10A DC, then you get 50% of the rated torque.

Argon has high dynamic range torque control which makes it suitable also for very small motors, such as ones with rated current around 300 mA.