Ndrive CP Hardware Manual ABB

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

Ndrive CP

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.