Parker Hannifin
110 Aries User Guide
DMTKE Motor Ke
Type Motor Product Rev
Syntax <a_>DMTKE<r> Aries 1.0
Units Rotary motor: r = volts
(Ø-peak)/krpm (measured line-to-line)
Linear motor: r = volts
(Ø-peak)/meter/second (measured line-to-line)
Range Rotary motor: Ø.Ø to 8ØØ.Ø : ±Ø.1
Linear motor: DMEPIT (electrical pitch) dependent
Default Ø.Ø (DMTKE of Ø results in motor configuration error)
Response DMTKE: <*>15.Ø
See Also DMEPIT, DMTLIM, DMTR, DMTSCL
Note: This command does not take effect until you cycle power to the drive,
or send the RESET command.
Auto-Setup: When using a Parker motor and the Aries Support Tool, this
command is automatically set for the selected motor.
If you did not use the Aries Support Tool, are using non-Parker motors, or
sent an RFS command to the drive, the parameter is set to zero (0)—you
must manually set this parameter to a non-zero number. Otherwise, the drive
reports the configuration errors E1–Motor Configuration Error and
E7–Bad Hall State, and shuts down the drive.
For a list of automatically configured commands, see DMTR.
The DMTKE command specifies the motor voltage constant (Ke). This
defaults to the nominal Ke of the motor selected with the DMTR command.
The motor’s torque/force constant (Kt) is derived from the motor’s voltage
constant (Ke) by the following relationship:
Rotary motors: peak value - 0 RMS,

)/(

200

33

)/(

‡†
‡† krpmVoltsKeANmKt
π

=

Linear motors:
peak value - 0 RMS,
sec))//((
200
33
)/(
‡†
‡† meterVoltsKeANKt

π

=
Note: The Aries requires values in rotary units. The Aries Support Tool
automatically performs these conversions when you use the Configuration
Wizard. If you do not use the Configuration Wizard, you must convert your
linear units to rotary units. For more information about conversion, see the
DMEPIT command.