Moog MSD Servo Drive Series User Manual

7.8.2LHMES(2)method
Fig. 7.35: “Auto commutation LHMES(2)” dialog box
With this method, saturation effects in stator inductance are evaluated. Two test
signal sequences are used for this purpose, whereby the position of the rotor axis is
MOOG
ID
No.: CB40859-001 Date: 02/2018
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known after the first sequence and the direction of movement after the second. This
method is suitable for determining the rotor position with braked rotors or motors with
a high mass inertia.
 Thetestsignalperiod(measurementfrequency)isdefinedwithP 392[2] -
CON_ICOM_Time.Ifthisvalueis0,thedriveusesadefaulttestsignal
frequencyof100Hz(period10ms).
 Thetestsignal’samplitude(currentI0)isdefinedwithP 393[0] - CON_
ICOM_Current.Ifthevalueis0,theamplitudeisderivedfromthemotorrated
current.Ifanamplitudegreaterthantheswitchingfrequency-dependent
powerstagecurrentisspecified,theamplitudeislimitedtohalfthepower
stagecurrent.
 Thetestsignal’sDCcomponent(currentI1)isdefinedwithP 393[1] - CON_
ICOM_Current.Ifthisvalueis0,theequalportionisdeterminedfromthe
motorratedcurrent.
NOTE
 Asimpleparametersettingisobtainedbyspecifyingthevalue0
forP 392[2] - CON_ICOM_Time,P 393[0] - CON_ICOM_Current
andP 393[1] - CON_ICOM_Current.Theparametersarethen
assigneddefaultvalueswhicharederivedfromthemotor/power
stagecurrent.Thenthemeasurementisperformed.
 InordertobeabletousethecomplexLHMESautocommutation
methodtoitsfullextent,youwillneedtoconsultwithMoog.
Precondition
The rotor must be securely braked so that it will not be able to move when the rated
current is applied. The motor’s stator must have an iron-
core.

Moog MSD Servo Drive Series Specifications

General

Brand	Moog
Model	MSD Servo Drive Series
Category	DC Drives
Language	English