DMC Sigma2N - Menu 5.3 Voltage Limits

Simga2N Traction Advanced Manual– V1.3 Page 100 (166) ©2021 DMC GmbH Herten Germany
Menu 5.3 “Voltage limits”
Cal.
Ref.
Parameter name “Calibrator text”
Range
Step
size
Default
Index
Sub-
index
48V units
1
Low voltage cutback start level “LVCBstrt”
16.0V - 60.0V
0.1V
20.0
0x2604
0x1
2
Low voltage cutback end level “LVCBend”
16.0V - 60.0V
0.1V
16.0
0x2604
0x2
3
Low voltage error level “LVerror”
14.0V - 60.0V
0.1V
14.0
0x2604
0x3
4
High voltage cutback start level “HVCBstrt
24.0V - 67.5V
0.1V
60.0
0x2605
0x1
5
High voltage cutback end level “HVCBend”
24.0V - 67.5V
0.1V
67.5
0x2605
0x2
6
High voltage error level “HVerror”
24.0V – 70.0V
0.1V
70.0
0x2605
0x3
96V units
1
Low voltage cutback start level “LVCBstrt”
16.0V - 120.0V
0.1V
20.0
0x2604
0x1
2
Low voltage cutback end level “LVCBend”
16.0V - 120.0V
0.1V
16.0
0x2604
0x2
3
Low voltage error level “LVerror”
14.0V - 120.0V
0.1V
14.0
0x2604
0x3
4
High voltage cutback start level “HVCBstrt
24.0V - 138.5V
0.1V
130.0
0x2605
0x1
5
High voltage cutback end level “HVCBend”
24.0V - 138.5V
0.1V
138.5
0x2605
0x2
6
High voltage error level “HVerror”
24.0V – 140.0V
0.1V
140.0
0x2605
0x3
120V units
1
Low voltage cutback start level “LVCBstrt”
16.0V - 150.0V
0.1V
20.0
0x2604
0x1
2
Low voltage cutback end level “LVCBend”
16.0V - 150.0V
0.1V
16.0
0x2604
0x2
3
Low voltage error level “LVerror”
14.0V - 150.0V
0.1V
14.0
0x2604
0x3
4
High voltage cutback start level “HVCBstrt
24.0V - 184.5V
0.1V
173.0
0x2605
0x1
5
High voltage cutback end level “HVCBend”
24.0V - 184.5V
0.1V
184.5
0x2605
0x2
6
High voltage error level “HVerror”
24.0V – 187.0V
0.1V
187.0
0x2605
0x3
M5.3-1 Low voltage cutback start level “LVCBstrt”
M5.3-2 Low voltage cutback end level “LVCBend”
M5.3-3 Low voltage error level “LVerror”
Low voltages occur when the battery is discharged. Or when a large power (current) surge from the battery
occurs, for example, the vehicle is about to drive.
Low voltage cut back
When the voltage is getting low, the controller will limit the power withdrawn from the battery. It will do this
by cutting back the maximum drive power or the maximum driving speed (according to “M2-11 Digital output
PWM chopping frequency “DO freq”
This parameter can be used to change the chopping frequency used to lower the voltage applied at the digital
outputs.
Use speed limits instead of torque limits “TmpLVSpL””) with a percentage as shown in the graph below. Only
drive power is cut. Brake power is not cut.
When there is no cut back, the maximum drive power/speed is 100 %.
When the cut back is 100 %, the maximum drive power/speed is at 0 %.
The maximum drive power/speed is the drive power/speed that is available to the user. As long as the user
doesn’t use this drive power/speed, it will not be noticed. But when the user demands more drive
power/speed, the drive power/speed is limited to the maximum drive power/speed available. When this
occurs, the Status menu of the controller shows the ‘LV’ limit indication. Also the error F02 is displayed during
low voltage cut back.
The maximum drive power limit will run from 100 % (no cut back) to 0 % (full cut back). This is displayed also
in the Status Menu at “DriveTqLim”.
The low voltage start and end cut back levels are adjustable in the Sigma2 controllers.