Elmo ISP manual Appendix B Current limits contour adjustment, Velocity Torque

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Appendix B - Current limits contour adjustment

The amplifier can be configured to have either continuous current limit or peak current limit or both which depend on motor velocity feedback. This function is enabled by calculating and inserting R11, R13.

The continuous current limit is speed dependent when R11 is inserted. The peak current limit is speed dependent when R13 is inserted.

The general shape of the operating envelope is given in fig. B-1

Velocity

 

 

 

N1

 

 

 

N2

 

 

 

T2

Tc

T3

Tp

Torque

Tc - Max continuous torque up to velocity N1

T2 - Continuous torque at max velocity (Nmax).

Tp - Max peak torque up to velocity N2.

T3 - Peak torque at maximum velocity.

Fig. B-1: Current limits contour

The user should derive the relations r1=N1/Nmax, r2=T2/Tc,

s1=N2/Nmax and

s2=T3/Tp from the motor data sheet.

 

R11 and R10 (for continuous limit) and/or R13/R12 (for peak limit) should be installed according to the following relations:

ISP - Rev 6/95

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Contents Rev 6/95 ISP Rev 6/95 ELMO-WARRANTY Performance Read chapters Table of Contents Balance adjustment Current limit adjustment Protective functions Standard featuresDescription Type Designation Technical specificationsOperation of the servo control Inputs Velocity mode Current mode Velocity control using armature voltage feedbackTime dependent peak current limit Current loopCurrent limits Dynamic contouring of continuous and peak current limits Operation of the shunt regulator Short circuit protection Temperature protectionLoss of velocity feedback signal Protective functionsCurrent Command Monitor Input ISP Control Board Page Contact rating 0.5A, 200V, 10W Terminals of ISP Panel Version Mother Board terminals MBA-ISP/N GND Terminals for ISP mounted in 3U size ENCContact rating 0.5A, 200V, 10W Page MBA ISP/3UE Wiring Installation procedures Mounting2Vdcmin Vdc 0.9Vdcmax AC power supplyLoad inductance ISP GND Wiring diagramsDo not ground GroundAC ISP ISP Control Connections Tachogenerator Feedback ISP Control Connections Armature Voltage Feedback Disable by Low Start Up ProceduresEnable by High ISP Control Board See .1 for calculation of other values Converting the amplifier into current modeSelecting the reference signal gain For Vtm Activating the loss of tacho protection velocity mode onlyActivating the dynamic contouring of the current limits Latch mode of the protective functionsVelocity control using tachogenerator feedback IxR compensation For ISP-X/65For ISP-X/135 Current limit adjustment Amplifier adjustment and diagnosticsBalance adjustment Adjustment of the IxR compensation Adjusting the motor speed velocity mode onlyResponse adjustment velocity mode only Typical velocity response waveforms ISP Rev 6/95 LED diagnostics Tables and Summaries Adjusting trimmersAppendix a Response adjustment current loop Fig. A-1 Typical current response waveforms ISP Rev 6/95 Velocity Torque Appendix B Current limits contour adjustmentDynamic contouring with armature voltage feedback ISP Rev 6/95 SP1 TOP View SP1 Side View SP1 Side View SP2 TOP View SP2 Side View SP2 Side View SP3 TOP View SP3 Side View SP3 Side View SP4 TOP View SP4 Side View SP4 Side View ISP Rack Mounting 8T and 15T TOP View ISP Rack Mounting 3U/8T Side View 128.7 Front Panel for ISP 3U/8T ISP Rack Mounting 3U/15T -SIDE View ISP Rack Mounting 3U/15T Side View Front Panel for ISP 3U/15T ISP Rack Mounting 3U/12T and 3U/19T TOP View ISP Rack Mounting 3U/12T -SIDE View ISP Rack Mounting 3U/12T Side View Front Panel for ISP 3U/12T ISP Rack Mounting 3U/19T -SIDE View ISP Rack Mounting 3U/19T Side View Front Panel for ISP 3U/19T Enclosure Mechanical Outline Europe List of Elmo Service Centers