Keba ServoOne junior Device Help

6.8.2.1Activationofsensorlesscontrolforasynchronousmotors
Proceed as follows:
No. Activity
1
Setmotortype(P 450[0] - MOT_Type)to“2(ASM)=asynchronous
motor”.
2 Enterthemotorname(P 451[0] - MOT_Name).
3
Copythemotorvariablesfromtheratingplateintotheappropriateinput
box.
4 Startmotoridentificationtoidentifyothermotorparameters.
5
Inthe“Encoderselection”screen(see also section "Encoder selection"
on page 53)under“Encoderforcommutationandtorquecontrol,”set
P 520[0] - ENC_MConto“CH4(4)=virtualencoder(Channel4)”.
6
Under“virtualencoder(Channel4)”"Encoderselection"set(P 508[0] -
ENC_CH4_Sel)to"SFC(8)=takevaluesofSFCmodel".
7
Inthe“BasicControlSettings”screen(seesection“Basicsettings”on
page101)set“SpeedfilterTF”(P 351[0] - CON_SCALC_Tf)to10ms.
8
Inthe“Asynchronousmotorcontrolsettingsidentification”screen(see
also section "Asynchronous motor" on page 38)enterthe“Totalmoment
ofinertia”ofthesystem(P 1516[0] - SCD_JSum).Enteravaluethatis
toosmallratherthantoobigtoavoidatendencytooscillate.Automatic
detectionisnotadvisableduetothecontroldynamicsandaccuracy
required.
9
Inthesamescreenunder“Controldesignbystiffness”setP 1515[0] -
SCD_ConDesign (Stiffness)to10%.
Table 6.32: Commissioning a sensorless-controlled asynchronous motor
ID No.: 0842.26B.5-01Date: 09.2020
ServoOne- Device Help
100
6 Encoder
Additionalsettingparameters
P No. Index Name Unit Description
351  CON_SCALC_Tf  Speedfilter
 0 CON_SCALC_Tf ms Filtertimeconst.speedcontrol(motor)
 1 CON_SCALC_Tf ms Filtertimeconst.velocity(hydrauliccyl.)
 2 CON_SCALC_Tf ms Filtertimeconst.speedfrompositioncontrol.
792  EN_CH4_Kalman_SigInj  Sensorlesscontrol:Testsignalgenerator.
 0 Signal  
 7 FullSignalRange rpm SCtestsignal:Lineartransitionrangeupuntil
whichthetestsignalisreducedto0.
 8 IncreasingSignalRange rpm SCtestsignal:Lineartransitionrangeupuntil
whichthetestsignalisreducedto0.
 9 dcurrentoffset A SCtestsignal:dcurrentoffsetofsinusoidal
signal.
1959  CON_SFC_Para  SFCParameter
 0 TF_is ms filtertimeconstantofisd/isq.
 1 K_ov % Anti-overturninglimitationfactor.
 2 K_isd % d-axiscurrentcontrolscaling.
 3 Tstart ms start-uptime(fluxsettling).
1973  CON_SFC_VoltageError  SettingsforSFCvoltageerrorsmodel.Low
voltagecharacteristic:mustbesetduringthe
motoridentification;mayrequiresome
coordinationeffort.
 0 I_err A low-voltagecharacteristic:cornercurrent
 1 V_err V low-voltagecharacteristic:cornervoltage.
Table 6.33: "Sensorless control of asynchronous motor” parameter

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Brand	Keba
Model	ServoOne junior
Category	Controller
Language	English