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Toshiba TOSVERT VF-AS1 Instruction Manual

Light-load high-speed operation
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E6581327
TOSVERT VF-AS1
Light-load high-speed operation
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

    E6581327 - Contents - 1. Introduction ........................2 2. Function ..........................2 3. Related parameters......................3 4. Light-load high-speed operation ..................4 Mode description ......................4 4.1.1. Automatic setting mode of high-speed operation speed (f328=1, 2)....5 4.1.2. Fixed setting mode of high-speed operation speed (f328=3, 4) ....... 7 5....
  • Page 3: 1. Introduction

    E6581327 1. Introduction Thank you for your purchase of the Toshiba inverter “TOSVERT VF-AS1”. This instruction manual explains the light-load high-speed operation of VF-AS1. 2. Function The light-load high-speed operation is used to increase the operating efficiency of the machine by increasing the rotational speed of the motor when it is operated under light load.
  • Page 4: 3. Related Parameters

    E6581327 3. Related parameters Related parameters for light-load high-speed operation Minimum Vector control Commu Write Adjust Default setting unit Title nication Function Adjustment range during ment Speed Torque setting control control (Panel/Com running (Note) control control munication) 0:Deselect 1: High-speed operation speed set automatically (Power running at F command :Raising)
  • Page 5: 4. Light-Load High-Speed Operation

    E6581327 4. Light-load high-speed operation Mode description The light-load high-speed operation includes the modes below: Each mode can be set by the light-load high-speed operation selection (f328). Title/function Default setting Action 0:Deselect Light-load high-speed operation disabled. 1:High-speed operation speed set automatically When inverter judges to be light-load, the (Power running at F command:Raising)
  • Page 6: Automatic Setting Mode Of High-Speed Operation Speed (F328=1, 2)

    E6581327 4.1.1. Automatic setting mode of high-speed operation speed (f328=1, 2) The diagram on the next page(Fig.1) is the timing chart when the automatic setting mode of high-speed operation speed (f328=1) is applied to lift application. At the operation frequency above the light-load high-speed operation switching lower limit frequency (f331) (point A in the Fig.1), if a detected torque (*1) after completion of speed reach is below the switching load torque during power running (f335 setting value), the inverter judges to be light-load.
  • Page 7 E6581327 《Example of operation》Light-load high-speed operation selection (f328=1: High-speed operation speed set automatically): F (Raising) Light-load high-speed operation Operation frequency (Hz) High-speed operation frequency varies with load torque. f102 Light-load high-speed operation load detection time f333 Speed reach detection band Light-load high-speed operation load f102 detection waiting time f332...
  • Page 8: Fixed Setting Mode Of High-Speed Operation Speed (F328=3, 4)

    E6581327 4.1.2. Fixed setting mode of high-speed operation speed (f328=3, 4) The diagram on the next page(Fig.2) is the timing chart when fixed setting mode of the high-speed operation speed(f328=3) is applied to lift application. At the operation frequency above the light-load high-speed operation switching lower limit frequency (f331) (point A in the Fig.2), if an average torque during the light-load high-speed operation load detection time (f333) after completion of speed reach and after the light-load high-speed operation load detection waiting time (f332) has elapsed is below the switching load torque during power running...
  • Page 9 E6581327 《Example of operation》 Light-load high-speed operation selection (f328=3: High-speed operation set with f330): F (Raising) Light-load high-speed operation Automatic light-load high-speed operation frequency f330 f102 Light-load high-speed operation Speed reach load detection time f333 detection band Light-load high-speed operation f102 load detection waiting time f332 Speed reach...
  • Page 10: 5. How To Adjust Parameters

    E6581327 5. How to adjust parameters If the light-load high-speed operation is used, it is necessary to always set the motor-related parameters (Motor constants) regardless of setting of V/f control mode selection (pt). Refer to Section 6-22 of VF-AS1 instruction manual (E6581301) to set motor-related parameters. In addition, for the high-speed operation fixed setting mode (f328=3, 4), the learning action allows the light-load high-speed operation to be adjusted easily.
  • Page 11: Fixed Setting Mode Of High-Speed Operation Speed

    E6581327 Fixed setting mode of high-speed operation speed 《Adjustment method using the learning function for lift application》 If the light-load high-speed operation is carried out with 60Hz of normal operation, follow the procedure below: ① Set the automatic light-load high-speed operation frequency (f330). Ex.: f330=90Hz ②...