Curtis 1222 - Motor Control Tuning: Field Weakening Control

Curtis 1222 Manual, os 15
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2 9 J A N U A R Y 2 0 1 3 D R A F T
MOTOR CONTROL TUNING: FIELD WEAKENING CONTROL
ALLOWABLE
PARAMETER RANGE DESCRIPTION
FW Base Speed 200 – 6000 rpm This parameter needs to be reset each time the Motor Type is changed.
0x410A 0x00 200 – 6000 See Motor Type table on page 56.
Field Weakening 0 – 100 % Determines the amount of high speed power the controller will allow,
0x4108 0x00 0 – 1024 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.
Weakening Rate 0 – 100 % Determines the control loop gains for field weakening. Setting the rate
0x412B 0x00 0 – 500 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 0 – 800 A Min Field Current sets the amount of current used to pre-flux the steer
0x4112 0x00 0 – 8000 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.
3 — PROGRAMMABLE PARAMETERS: Field Weakening Control
Parameters
PCF RIS