Kanalog Interfacing with a drive that takes "dual phase" input
Posted: Sat Mar 16, 2019 11:33 pm
I have a servo drive (aerotech BA30) that has an option for "dual phase" control. Wherein you provide external commutation in the form of +/- 10 volt commands on 2 separate inputs. The manual for the drive describes dual phase as:
"This mode is used with a brushless motor only. In this configuration, the differential input, pre-amplifier, and self-commutation circuits are bypassed. The dual-phase inputs are sinusoidal and are 120° out of phase from each other. The third phase is generated by the amplifier. "
Would I be able to use 2 kanalog DAC outputs to generate the dual phase commands described above? The position input to the kanalog would be a quadrature encoder wherein I can sync the Z signal with a specific phase of the motor.
If you look at the drive datasheet you will see that it also supports other control types that would be easier to setup. I have an issue however the issue is that the motor I am using has no hall sensors. Moreover its a 14 pole motor so external commutation encoders don't appear to be an option as the common ones from US digital and AMT don't support motors with more than 12 poles.
Admittedly I am trying to piece together a bunch of parts from the scrap pile.
"This mode is used with a brushless motor only. In this configuration, the differential input, pre-amplifier, and self-commutation circuits are bypassed. The dual-phase inputs are sinusoidal and are 120° out of phase from each other. The third phase is generated by the amplifier. "
Would I be able to use 2 kanalog DAC outputs to generate the dual phase commands described above? The position input to the kanalog would be a quadrature encoder wherein I can sync the Z signal with a specific phase of the motor.
If you look at the drive datasheet you will see that it also supports other control types that would be easier to setup. I have an issue however the issue is that the motor I am using has no hall sensors. Moreover its a 14 pole motor so external commutation encoders don't appear to be an option as the common ones from US digital and AMT don't support motors with more than 12 poles.
Admittedly I am trying to piece together a bunch of parts from the scrap pile.