AXIS#.MOTOR.KE

Description

AXIS#.MOTOR.KE is the back EMF constant for the motor. The back EMF constant defines how much voltage is generated at the motors coils. The relationship between AXIS#.MOTOR.KE and speed is described by the following equation:

Coil Voltage = AXIS#.MOTOR.KE * AXIS#.VL.FB

AXIS#.VL.FB is in units of krpm for rotary motors.

The maximum speed for interior permanent magnet motors (IPM) is determined by AXIS#.MOTOR.KE and VBUS.VALUE. An overspeed fault is generated if AXIS#.MOTOR.TYPE  is set to 6 (IPM) and AXIS#.VL.FB * AXIS#.MOTOR.KE exceeds VBUS.VALUE.


  • This parameter is required to be configured for AXIS#.MOTOR.TYPE = 6

Context

For more information see Motor.

Versions

Action Version Notes
Implemented 02-00-00-000

General Information

Type

Read/Write

Units

Vpeak/krpm for Rotary Motors

Range

0 to 100,000

Default Value

20

Data Type

Float

See Also

N/A

Stored in Non-Volatile Memory

Yes

Variants Supported

All variants are supported.

Fieldbus Information

EtherCAT CoE and CANopen

Command

Index

SubIndex

Data Type

Units

Float Scale

Access

PDO Mappable

AXIS1.MOTOR.KE

500bh

13h

Unsigned32

-

1000:1

Read/Write

No

AXIS2.MOTOR.KE

510bh

13h

Unsigned32

-

1000:1

Read/Write

No

EtherNet/IP

Name

ID

Hex

Data Type

Access

Units

AXIS1.MOTOR.KE

6241

1861

Unsigned32

Read Only

-

AXIS2.MOTOR.KE

71777

1186

Unsigned32

Read Only

-

PROFINET

Parameter

PNU

Data Type

Access

Units

AXIS#.MOTOR.KE

6241

Float

Read Only

-