Santerno Sinus Penta - Page 362

SINUS PENTA
GUIDA ALLA
PROGRAMMAZIONE
362/486
C213a Torque Decrease Proportional Gain due to Overvoltage
C213a
Range
0 ÷ 32000
0.000 ÷ 32.000
Default
20
0.020
Level
ENGINEERING
Address
1251
Control
VTC
Function
This function is available only when the VTC control is activated.
This is the proportional gain of the DC-
bus voltage regulator adjusting the resisting
torque limit when voltage exceeds the value set in parameter C213c.
C213b Torque Decrease Integral Gain due to Overvoltage
C213b
Range
0 ÷ 32000
0.000 ÷ 32.000
Default
10
0.010
Level
ENGINEERING
Address
1252
Control
VTC
Function
This function is available only when the VTC control is activated.
This is the integral gain of the DC-
bus voltage regulator adjusting the resisting
torque limit when voltage exceeds the value set in parameter C213c.
C213c Voltage Reference for Torque Decrease
C213c
Range
0 ÷ 1200
0.0 ÷ 120.0%
Default
1000
100.0%
Level
ENGINEERING
Address
1253
Control
VTC
Function
This function is available only when the VTC control is activated.
It sets the reference value for the regulator DC voltage adjusting the resisting torque
limit. The limiting function activates when voltage exceeds the value below:
Vth = C213c * Vunlock /100
where Vunlock
is based on the inverter voltage class and is typically higher than
the trip voltage of the braking resistor. The default value ensures that t
he braking
resistor trips before the torque limit function is activated.
If the braking resistor is not
fitted, it may be useful to set a lower value for this parameter to ensure prompt
activation of the torque limit.
C213d Flux Limit due to Torque Decrease Activation
C213d
Range
0 ÷ 1000
0.0 ÷ 100.0%
Default
0
0.0%
Level
ENGINEERING
Address
1254
Control
VTC
Function
This function is available only when the VTC control is activated.
If the torque limit is adjusted by the DC bus voltage regulator, the rotor flux
is
decreased
by the same value of the torque limit multiplied by the value of this
parameter. Example:
If the regulator generates a 50% instant torque limit and
C213d is worth 30%, the flux will be decreased by 50 * 30 / (100 * 100) = 15%,
and
will be increased to 85%
of the value that should be adopted under normal
operating conditions.
This parameter keeps DC voltage low when the motor acceleration
due to external
causes continues over time. Low parameter values (< 50%) may cause uncont
rolled
rotation of the motor.