Motor Control Tuning: Field Weakening Control - Curtis 1222 Manual

ALLOWABLE
PARAMETER RANGE
FW Base Speed 200 – 6000 rpm
0x410A 0x00 200 – 6000
Field Weakening
0 – 100 %
0x4108 0x00 0 – 1024
Weakening Rate 0 – 100 %
0x412B 0x00 0 – 500
Min Field Current 0 – 800 A
0x4112 0x00 0 – 8000
Curtis 1222 Manual,
os 15
2 9 J A N U A R Y 2 0 1 3 D R A F T
3 — PROGRAMMABLE PARAMETERS: Field Weakening Control

MOTOR CONTROL TUNING: FIELD WEAKENING CONTROL

This parameter needs to be reset each time the Motor Type is changed.
See Motor Type table on page 56.
Determines the amount of high speed power the controller will allow,
while still maintaining maximum effficiency at the allowed power.
Reducing this parameter effectively reduces controller current at high
speeds, which can reduce energy consumption and motor heating, but
at the expense of reduced available torque from the motor.
Determines the control loop gains for field weakening. Setting the rate
too low may create surging in the vehicle as it accelerates at mid to high
speeds. Setting the rate too high may create high frequency oscillations
(usually audible) when the vehicle accelerates at mid to high speeds.
Min Field Current sets the amount of current used to pre-flux the steer
motor field. This current will run in the steer motor whenever the bridge
is enabled (Interlock = On). Pre-fluxing the steer motor improves steering
response, but because it also reduces efficiency and causes controller
and steer motor heating, this parameter is typically set to zero.
DESCRIPTION
Parameters
55