Yaskawa A1000 AC Drive - Manual (Page 6)

6 YASKAWA TM.A1000SW.062 Overvoltage Suppression A1000 Custom Software Supplement
2 Overvoltage Suppression A1000 Custom Software
2 Overvoltage Suppression A1000 Custom Software
‹ Overview
The Overvoltage Suppression (OV Suppression) feature minimizes the chance of Overvoltage trips and the need for
dynamic braking for eccentric load applications by controlling the amount of regenerative energy during overhauling
conditions. This firmware is not available as factory installed on A1000 and therefore offered free of charge for
download.
‹ Applicable Models
This Overvoltage Suppression software is available for the drive models listed in Table 1 .
Table 1 Applicable Models
‹ Basic Concepts and Principles
Overvoltage Suppression software allows the drive to control rotating machinery where part of the machine's cycle
creates a cyclic regenerative (over-hauling) load. This custom software is specifically designed for Pump Jack Oil Well
and Stamping/Punch Press applications. This software eliminates the need for dynamic braking resistors typically
required in cyclic regenerative applications.
This software monitors the torque-producing current (Iq) in the motor, and regulates this against an Iq setpoint using a PI
controller. The output frequency is increased to force a higher (positive) Iq should the torque producing current fall below
the setpoint. This will avoid a regenerative condition in the motor. This function is disabled during auto-tuning.
Figure 1
Figure 1 Stamping Press Application
Voltage Class Model Software Version
200 V CIMR-AU2A0004 to CIMR-AU2A0415
VSA91013† 400 V CIMR-AU4A0002 to CIMR-AU4A0675
600 V CIMR-AU5A0003 to CIMR-AU5A0242
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