Parker AC30 series User Manual

C-42 Parameter Reference
AC30 series Variable Speed Drive
Once the motor is rotating at a higher speed than the threshold value, a position offset is calculated. This position offset is then used in real Closed
Loop Vector Control. The incremental position from the encoder is now processed as an absolute position.
The method should be enabled if the drive is in speed control mode. ( In torque control mode, the method won’t give correct and accurate position
offset ).
The method is run until the final state :
- if the speed setpoint is set to a higher value than 5% ( the speed threshold appearing in the PMAC SVC block ). A time out of 5s allows to trip
if the estimated speed stays below 5%.
If the speed setpoint is set to a lower value than 5%, then the drive stays in open loop (VHZ ) as long as the setpoint is kept below 5%.
- If the speed from the estimator is the same sign as the speed from the encoder feedback. If not, the drive trips.
- If the speed value from the estimator and the speed from the actual encoder feedback follow the same gradient. Considering a speed error
betwen speed estimator an speed feedback of less than 0.5 Hz ( Electrical speed ) as a target provides a good criterion.
If not, a time out of 1s allows to trip the drive.
Because of timing constraint, especially when the pwm frequency is set to a high value ( 8kHz for high speed motors ), the method will force the
pwm to run at 4kHz, no random pattern.

Parker AC30 series Specifications

General

Control Modes	Closed-loop vector
Feedback	Encoder
Operating Temperature	0 to 40°C (32 to 104°F) standard, -20 to 50°C (-4 to 122°F) with derating
Protection	Overcurrent, Overvoltage, Undervoltage
Communication	RS485