TDE MACNO OPD EXP - Voltage;Flux Control

33
User’s manual
2.2.5 VOLTAGE/FLUX CONTROL
The flux regulator generates the request for the flux current required to maintain the magnetic rotor
flux equal to the reference value set in parameter P35 when the working area is with Constant
torque.
P35
Voltage
regulator
+
-
Flux reference
value
Estimated flux
P80; P81 and P82
Flux current
reference value
Constant torque working area
D27
When operating with Constant Power the regulator generates a request for the flux current required
to ensure the stator voltage module is the same as the voltage reference value and thus to weaken
the flux gradually as the speed increases.
The active voltage reference value (displayed in d09) is always the smallest of the three values,
which are all normalized in relation to the rated motor voltage (P62):
o Parameter P64 “Maximum operating voltage” multiplied by coefficient P36;
o A term linked to the direct bus voltage with a margin set with P125 (default 96%), because
the maximum stator voltage that can be delivered may not exceed the direct voltage divided
by √2;
A term linked to the estimated stator voltage to be applied during flux weakening based on the
required current so that there is a margin with regard to the maximum voltage available and thus to
be better equipped to deal with variations in the required torque
Name Description Min Max Default UM Scale
PRC_FLX_REF P35 - Flux Reference 0.0 120.0 100 % MOT_FLX_NOM 40.96
V_REF_COEFF
P36 - Kv Max operating voltage
multiply factor
0.0 100.0 100 327.67
PRC_FLX_MIN P52 - Minimum Flux admitted 0.0 100.0 2 % MOT_FLX_NOM 40.96
V_REG_KP
P80 - Kpi voltage regulator
proportional gain
0.1 100.0 9.1 10
V_REG_TF
P82 - Tfi voltage regulator (filter)
time constant
0.0 1000.0 11 ms 10
MOD_INDEX_MAX P122 - Max. modulation index 0.500 0.995 0.98 1000
PRC_V_REF_DCBUS
P125 - Voltage reference
function of DC bus
0.0 100.0 96.00 % 327.67
PRC_V_REG_KP_COEFF
P127 - KpV Corrective coeff.
estimated Kp for voltage loops
0.0 200.0 100 % 40.96
V_DELAY_COMP
P161 - PWM delay
compensation on the voltages
-800.0 800.2 50.0 % TPWM 40.96
V_REF
D09 - Voltage reference value at
max. rev.
-100 100 0 % MOT_V_NOM 40.96
MOT_V
D17 - Stator voltage reference
value module
0 V rms 16
PRC_MOT_V
D18 - Stator voltage reference
value module
-100 100 0 % MOT_V_NOM 40.96
MOD_INDEX D19 - Modulation index -100 100 0 40.96
MOT_FLX D27 - Motor Flux 0 % MOT_FLX_NOM 40.96