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Download CFW700 - Programming Manual
Transcript
Scalar Control (V/f) Working: if the motor current exceeds the value adjusted in P0135 during the acceleration or the deceleration, the speed will no longer be increased (acceleration) or decreased (deceleration). When the motor current reaches a value below P0135 the motor will again accelerate or decelerate. Refer to the Figure 9.8 on page 9-7. It acts faster than the “Ramp Deceleration” mode. It acts in the motorization and braking modes. Current limitation of the “Ramp Deceleration” type: It avoids the stalling of the motor during a torque overload at the acceleration or at constant speed. Working: if the motor current exceeds the value adjusted in P0135, the input of the speed ramp is set to zero forcing a deceleration. When the motor current reaches a value below P0135 the motor will accelerate again. Refer to the Figure 9.8 on page 9-7. Motor current Motor current P0135 P0135 Time Time 9 Speed Speed Deceleration via ramp (P0101) Acceleration via ramp (P0100) Time During acceleration Time During deceleration (a) “Ramp Hold” Motor current Time P0135 Time Speed Decelerates via ramp P0101 Time (b) “Ramp Deceleration” Figure 9.8: (a) and (b) Current limitation via P0135 working modes CFW700 | 9-7
