AEROTECH Ndrive MP Hardware Manual

Chapter 1: Introduction

Aerotech’s Ndrive MP (Ultra-Compact “Micro” PWM)network digital driveis ahighperformanceamplifier.

Thedriveprovides deterministic behavior, auto-identification, and easy software setup.   The Ndrive MP’s

high performancedoubleprecisionfloating point DSP controls thedigital PID andcurrent loops.   All system

configuration is done using software-settable parameters, including control loop gains and system safety

functions.

TheNdriveMP is offeredwithanoptional encoderinterpolationfeature(-MXU), anauxiliary squarewave

encoderinput for dual loopcontrol, dedicated analog anddigital I/O (expandable with the-IO option), and

separate powerconnections formotorandcontrol supply voltages

Power Dissipation

Ndrive MP

Thefirst figure below shows theamplifierpowerdissipation undercontinuous powersupply andoutput

current conditions.  The values onthegraphrepresent thepeak current that theamplifierwouldprovideduring

operation.  Whenthebus voltageandoutput current areknown, theamplifierpowerdissipationis foundusing

this graph.  Thesecondfigureshows themaximum recommendedambient temperatureas afunctionof

amplifier power dissipation.  Use this graph along with thepowerdissipation obtained from thefirst graph to

determine themaximum ambient temperature.  If theresult is lowerthantheknownoperatingambient

temperature, additional measures are required to cool the NdriveMP.  Mountingit toalargemetal platefor

extra heat-sinking and providing additional fan flow are suggested

2.1.CommunicationChannelSettings

UsetheDeviceNumberswitchesofS1toassignacommunicationchannelnumbertotheNdriveMP.Ifyou

areusingmultipledrives,eachdrivemustbeassignedauniquecommunicationchannel.Multipledrivesare

typicallyconfiguredusingsequentialcommunicationchannels