MOTOR.KE

Description

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

Coil Voltage = MOTOR.KE * VL.FB

VL.FB is in units of krpm for rotary motors and in units of m/s for linear motors.

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


  • This parameter is automatically configured for Kollmorgen motors when AXIS#.MOTOR.AUTOSET = 1 and can be modified while AXIS#.MOTOR.AUTOSET = 1 if its AXIS#.MOTOR.DISAUTOSET index = 1.

General Information

Type

NV Parameter

Units

Vpeak/krpm for Rotary Motors

Vpeak/m/s for Linear Motors

Range

0.0 to 100,000

Default Value

0

Data Type

Float

See Also

N/A

Start Version

M_01-03-06-000

Variants Supported

Variant Supported
AKD Base Yes
AKD with Position Indexer Yes
AKD EtherCAT Yes
AKD CANopen Yes
AKD BASIC Yes
AKD SynqNet Yes*
AKD EtherNet/IP Yes
AKD PROFINET Yes
AKD Sercos® III Yes
AKD-N Yes
AKD-C No

*In SynqNet, a parameter may be available in the firmware but have no effect on the system. See SynqNet Supported Parameters.

Fieldbus Information

If your drive type is listed as supported but no index, address, or instance number is listed, then this parameter is accessible through WorkBench, but not over your fieldbus type. For information on SynqNet parameters see SynqNet Supported Parameters.

EtherCAT CoE and CANopen
Index/Subindex Object Start Version

5260h /0

M_01-03-06-000
PROFINET and Sercos® III
Fieldbus Address Attributes Signed?

PROFINET

2608 DWord No
Sercos® III 4 Octets
EtherNet/IP
Fieldbus Instance Data Size Data Type
EtherNet/IP 609 4 Byte Float
Modbus
Register Address Is 64 bit? Attributes Signed?
1216 No 32 bit

No

Related Topics

Motor View | VL.FB | VBUS.VALUE