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E6581331
TOSVERT VF-AS1
Torque control Instruction Manual
The technical information in this manual is provided to explain the principal
functions and applications of the product, but not to grant you a license to
use the intellectual property or any other property of Toshiba Schneider
Inverter Corporation or a third party.
© Toshiba Schneider Inverter Corporation 2006
All rights reserved.

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   Summary of Contents for Toshiba TOSVERT VF-AS1

  • Page 1

    The technical information in this manual is provided to explain the principal functions and applications of the product, but not to grant you a license to use the intellectual property or any other property of Toshiba Schneider Inverter Corporation or a third party.

  • Page 2: Table Of Contents

    E6581331 − Contents − Torque control ........................2 What is torque control?......................3 Torque control setting ......................4 Concepts regarding torque control ..................8 Applied to application where the direction of rotation does not change......8 Applied to application where the direction of rotation changes........10 Speed limits in torque control mode ..................

  • Page 3: Torque Control

    E6581331 Torque control TOSVERT VF-AS1 supports the torque control that controls a power necessary for constant tension control such as winding control as well as speed control that controls the revolution of a motor. TOSVERT VF-AS1 can use the control methods below:...

  • Page 4: What Is Torque Control

    E6581331 What is torque control? A combination of an inverter and a motor generally uses speed control. As shown below, it gives an inverter a command of a desired rotational speed so that the inverter can control the motor to rotate at the speed as commanded. Main application Group Examples...

  • Page 5: Torque Control Setting

    E6581331 Torque control setting To operate the VF-AS1 under the torque control, set parameters following the procedure below: ■ Related parameters : V/f control mode selection f111 f118 : Input terminal function selection 1 to 8 (use one of them) f420 : Torque command selection •...

  • Page 6

    E6581331 ■ Torque control selection by means of terminal signals The method assigns the torque control switching signal to any of input terminals in the inverter and selects torque control/speed control by switching ON/OFF of the signal. In the standard setting at factory shipping, a function of preset speed command 3 is assigned to the S3 terminal.

  • Page 7

    E6581331 3) Torque command ■ Related parameters f420 : Torque command selection f435 : Prohibition of rotation in any direction other than the specified one (F or R) f201 : VI/II input point 1 setting f205 : VI/II input point 1 rate f203 : VI/II input point 2 setting f206 : VI/II input point 2 rate f210 : RR/S4 input point 1 setting...

  • Page 8

    E6581331 1) Current signal 4 to 20mAdc ⇒ VI/II input f108 (analog input VI/II current//voltage switching) =1 (current input) [Default setting] [Arbitrary setting] 100% Zf206Z= Zf206Z Motor Motor torque torque Zf205Z Zf205Z= 20mA 100% Zf201Z= Zf203Z= Zf201Z Zf203Z ★The relationship between the torque command •...

  • Page 9: Concepts Regarding Torque Control

    E6581331 Concepts regarding torque control Applied to application where the direction of rotation does not change Polarities of torque command and torque limit If the direction of rotation does not change continuously because of the machine characteristics, the torque control is used with f435 (Prohibition of rotation in any direction other than the specified one (F or R)) =1 (enabled).

  • Page 10

    E6581331 [Hint] Forward run Reverse run In the system shown below in which the product is sent in a fixed direction, the direction of Note: In actual systems, torque rotation of each motor is control is not necessarily determined by the command (F performed on all rolls.

  • Page 11: Applied To Application Where The Direction Of Rotation Changes

    E6581331 Applied to application where the direction of rotation changes ■ Polarities of torque command and torque limit If the direction of rotation of the motor changes continuously while the direction in which a force is applied does not change, the torque control is used with f435 (Prohibition of rotation in any direction other than the specified one (F or R)) = 0 (disabled).

  • Page 12: Speed Limits In Torque Control Mode

    E6581331 Speed limits in torque control mode f425 : Forward speed limit input selection f430 : Speed limit (torque=0) center value reference selection f426 : Forward speed limit input level f431 : Speed limit (toque=0) center value f427 : Reverse speed limit input selection f432 : Speed limit (toque=0) band f428 : Reverse speed limit input level f433 : Speed limit (toque=0) recovery time...

  • Page 13

    E6581331 [Setting of forward speed limit level] f425 ( Forward speed limit input selection): Set to 4 (value of f426) f426 ( Forward speed limit input level): Set a desirable forward speed limit level. [Setting of reverse speed limit level] f427 ( Forward speed limit input selection): Set to 4 (value of f428) f428 ( Reverse speed limit input level): Set a desirable reverse speed limit level.

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