ACS880 User set change while DTC mode is selected
Hello,
A have an ACS880 drive which is connected trough two contactors to two different motors. The motors will never work in the same time. To change motor data I use parameter 96.11 (User set 1,2). In documentation is stated that multimotor applications work only in scalar mode.
The question is: will my configuration work in DTC mode, or only in scalar?
Thank you
A have an ACS880 drive which is connected trough two contactors to two different motors. The motors will never work in the same time. To change motor data I use parameter 96.11 (User set 1,2). In documentation is stated that multimotor applications work only in scalar mode.
The question is: will my configuration work in DTC mode, or only in scalar?
Thank you
Asked 9 months ago
Answers
0
Hi,
You should use scalar motor control, if you are planning to drive multiple motors using single drive. Please find the answer from manual.
Scalar motor control
It is possible to select scalar control as the motor control method instead of DTC (Direct Torque Control). In scalar control mode, the drive is controlled with a speed or frequency reference. However, the outstanding performance of DTC is not achieved in scalar control.
It is recommended to activate scalar motor control mode in the following situations:
• In multimotor drives: 1) if the load is not equally shared between the motors, 2) if the motors are of different sizes, or 3) if the motors are going to be changed after motor identification (ID run)
• If the nominal current of the motor is less than 1/6 of the nominal output current of the drive
• If the drive is used without a motor connected (for example, for test purposes)
• If the drive runs a medium-voltage motor through a step-up transformer. In scalar control, some standard features are not available.
You should use scalar motor control, if you are planning to drive multiple motors using single drive. Please find the answer from manual.
Scalar motor control
It is possible to select scalar control as the motor control method instead of DTC (Direct Torque Control). In scalar control mode, the drive is controlled with a speed or frequency reference. However, the outstanding performance of DTC is not achieved in scalar control.
It is recommended to activate scalar motor control mode in the following situations:
• In multimotor drives: 1) if the load is not equally shared between the motors, 2) if the motors are of different sizes, or 3) if the motors are going to be changed after motor identification (ID run)
• If the nominal current of the motor is less than 1/6 of the nominal output current of the drive
• If the drive is used without a motor connected (for example, for test purposes)
• If the drive runs a medium-voltage motor through a step-up transformer. In scalar control, some standard features are not available.
Answered 9 months ago
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