The PtMotorRotaryAttributesType provides common asset attributes of a rotary motor and is formally defined in Table 67.

Table 67 – PtMotorRotaryAttributesType Definition

Attribute	Value
BrowseName	PtMotorRotaryAttributesType
IsAbstract	False
References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of the PtMotorAttributesType defined in chapter 7.8.1
0:HasProperty	Variable	MotorPolePairs	0:UInt16	0:PropertyType	O, RO
0:HasComponent	Variable	MotorInertia	0:Float	0:AnalogUnitType	O, RO
0:HasComponent	Variable	MotorBackEMF	0:Float	0:AnalogUnitType	O, RO

Conformance Units

Powertrain Attributes Information

MotorPolePairs provides the number of pole pairs of the fundamental magnetic field in the air gap generated by the stator winding. It is usable to calculate the speed over frequency.

MotorInertia provides the rotor moment of inertia of a rotational motor. The unit of this asset attribute shall be kilogram meter squared [kg m²].

MotorBackEMF provides the back electromotive force of a synchronous motor. It is the voltage induced by the air gap field in the stator winding related to the rotational speed. It is measured at the terminals. The unit of this asset attribute shall be volt per revolutions per minute [V/rpm].