Chapter 6 – Firmware Description
ACA 635 IGBT Supply Sections
6-13
DC Voltage Controller
The DC voltage controller is the primary controller for the ISU. A block
diagram of the DC voltage controller is presented below.
The DC voltage controller keeps the DC voltage in a preset reference
in all load conditions. An error signal is calculated from DC voltage
measurement (Actual Signal 1.10 DC VOLTAGE) and Actual Signal
2.06 DC REF RAMP. The gain (Parameter 121.03 GAIN REL CALC)
and derivation time (Parameter 121.04 DER TIME CALC) of the PID
controller depend on signals 122.01 DC VOLTAGE ERROR and
161.08 TORQUE FILT ACT. Parameter
S
121.01 GAIN REL CALC and
121.02 DERIVATION TIME are used to calculate the output of the PID
algorithm. The output of the DC voltage controller is Parameter 122.04
TORQUE REF LIM, which is used as torque reference for hysteresis
control. The sign of rotation (supply phase order) determines the sign
of torque reference.
The PID controller parameters are pretuned. There is no need to
retune them.
The active power is calculated as a product of angular velocity and
torque seen by the ISU. Positive power means power flow from the
supply network to the DC link.
+
-
POWER
2.06
DC REF RAMP
FILTER
1.10
DC VOLTAGE
161.07
TORQUE ACT
161.08
TORQUE FILT ACT
1.05
FREQUENCY
CALCULATION
1.08
POWER
122.01
DC VOLTAGE ERROR
NONLINEAR PID
CONTROLLER
PID
121.03 GAIN REL
121.04 DER TIME
121.05 DC CTRL
121.01
GAIN REL
122.03
TORQUE CALC REF
LIMITER
137.01 TORQUE
122.04
TORQUE REF LIM
CALC
INTEG
REF MAX
CALC
T
f
P
=
T
×
2
× p
×
f
121.02
DERIVATION TIME
Summary of Contents for ACS 600 MultiDrive
Page 4: ......
Page 8: ...Safety Instructions vi ACA 635 IGBT Supply Sections ...
Page 57: ...Chapter 7 Fault Tracing 7 8 ACA 635 IGBT Supply Sections ...
Page 99: ...Appendix B Circuit Diagrams B 2 ACA 635 IGBT Supply Sections H ...
Page 100: ...Appendix B Circuit Diagrams ACA 635 IGBT Supply Sections B 3 ...
Page 101: ...Appendix B Circuit Diagrams B 4 ACA 635 IGBT Supply Sections ...
Page 102: ...Appendix B Circuit Diagrams ACA 635 IGBT Supply Sections B 5 ...
Page 103: ...Appendix B Circuit Diagrams B 6 ACA 635 IGBT Supply Sections ...
Page 104: ...Appendix B Circuit Diagrams ACA 635 IGBT Supply Sections B 7 ...
Page 105: ...Appendix B Circuit Diagrams B 8 ACA 635 IGBT Supply Sections ...
Page 106: ...Appendix B Circuit Diagrams ACA 635 IGBT Supply Sections B 9 ...
Page 107: ...Appendix B Circuit Diagrams B 10 ACA 635 IGBT Supply Sections ...
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