Ndrive CP Hardware Manual

 Aerotech’s Ndrive CP (Compact PWM)network digital driveis ahighperformanceamplifier. Thedrive

 provides deterministic behavior, auto-identification, and easy software setup. The Ndrive CP’s high

 performancedoubleprecision floating point DSP controls thedigital PID andcurrent loops. All system

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

 functions.

 TheNdriveCP 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.

 1.2.1. System Power Requirements

 Thefollowing equations canbeusedtodeterminetotal system powerrequirements. Theactual power

 required from the mains supply will bethecombinationof actual motorpower(work), motorresistance

 losses, andefficiency losses in the powerelectronics orpowertransformer. AnEfficiencyFactorof

 approximately 90% shouldbeusedinthefollowingequations

 1.2.2. Power Dissipation

 Theamplifier powerdissipation undercontinuous powersupply andoutput current conditions is shownin

 Figure 1-3. Thevalues onthegraphrepresent thepeak current that theamplifierwouldprovideduring

 operation. Whenthebus voltageandoutput current areknown, theamplifierpowerdissipationis foundusing

 this graph. Figure 1-4 shows themaximum recommendedambient temperatureas afunctionof amplifier

 powerdissipation. Usethis graphalongwiththepowerdissipationobtainedfrom thefirst graphtodetermine

 the maximumambient temperature. If theresult is lowerthantheknownoperatingambient temperature,

 additional measures arerequired to cool theNdriveCP. Mountingit toalargemetal plateforextraheat

sinking andproviding additional fan flow are suggested.

1.3. Mechanical Design

 Install the unit into a construction compliant for unlimited circuits enclosure. Each unit should be separated

 from otherdrives andsurroundedby 25mm (1")of freeairspace. A spaceof 100mm(4")shouldbeallowed

 along thefront of the unit for cable connections

Chapter 2: Installation and Configuration

 2.1. Communication Channel Settings

 UsetheDeviceNumberswitches toassignacommunicationchannel numbertotheNdriveCP. If youare

 using multiple drives, each drive must beassignedauniquecommunicationchannel. Multipledrives are

 typically configured using sequential communication channels.

 2.2. Power Connections

 TheNdriveCP has twoAC input connectors; oneforcontrol powerandasecondformotorpower. Fora

 completelist of electrical specifications, refer to Section 1.2.