Emerson unidrive sp - Motor Volts Per 1000 Rpm (Ke); Disable Auto-Switching Frequency Change; Motor Pole Pitch

Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
Menu 5
Unidrive SP Advanced User Guide 131
Issue Number: 10 www.controltechniques.com
This parameter is used to set up the current controller integral terms when the drive is disabled to prevent current transients when the drive is enabled
with a spinning motor. It is also used to provide a voltage feed forward term if high dynamic performance is selected with Pr 5.26.
The drive thermal protection scheme (see Pr 5.18 on page 124) reduces the switching frequency automatically when necessary to prevent the drive
from overheating. It is possible to disable this feature by setting this bit parameter to one. If the feature is disabled the drive trips immediately when
the IGBT temperature is too high.
This parameter should be set up to give the pole pitch of a linear motor, i.e. the movement of the motor for one cycle of the drive power output
waveforms, if auto-configuration with a linear EnDat encoder is required.
5.33 Motor volts per 1000rpm (Ke)
Drive modes Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range Servo 0 to 10,000
Default Servo 98
Second motor
parameter
Servo Pr 21.30
Update rate
Background read
5.35 Disable auto-switching frequency change
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default
Open-loop, Closed-loop vector, Servo,
Regen
0
Update rate
Background read
5.36 Motor pole pitch
Drive modes Open-loop, Closed-loop vector, Servo
Coding
Bit SP FI DE TE VM DP ND RA NC NV PT US RW BU PS
2111
Range Open-loop, Closed-loop vector, Servo 0 to 655.35mm
Default Open-loop, Closed-loop vector, Servo 0.00mm
Second motor
parameter
Open-loop, Closed-loop vector, Servo Pr 21.31
Update rate
Background read