Rockwell Automation 1336R REGEN LINE REG - Manual (Page 87)

Regenerative Brake Operation 3–35
Programming
Parameter No. 5
Display Units Volts
Parameter Type Read Only
Drive Units 1 = 0.1V
Actual Bus Voltage
Displays the actual voltage on the DC bus in DC volts.
Parameter No. 9
Display Units Number
Parameter Type Read/Write
Factory Default 0.50
Min/Max Value 0.50/0.55
Drive Units 1.00 = 4096
Conduction Angle Constant
Altering this parameter allows the conduction angle of the Regenerative Brake — The
duration of IGBT device conduction per period — to be tuned while the 1336 REGEN
Converter is enabled.
Example: For a setting of 0.5 , the conduction angle has a maximum value of 120˚.
For a setting of 0.55 , the conduction angle is at it’s minimum value, 113˚.
Reducing the [Cond Angle Const] increases the conduction angle. A larger conduction angle
yields higher Regenerative Brake efficiency, since regeneration for the utility cycle lasts longer.
A larger conduction angle however, also causes higher no-load quiescent currents.
Increasing the [Cond Angle Const] decreases the conduction angle, while slightly increasing
DC bus voltage and reducing no-load quiescent currents.
Parameter No. 10
Display Units Number
Parameter Type Read/Write
Factory Default 0.03
Min/Max Value 0.00/0.06
Drive Units 1.00 = 4096
Shift Angle Constant
Altering this parameter allows the conduction angle of the Regen Brake to be adjusted relative
to the reference point of 30˚, after zero crossing of the phase voltage.
The default factory setting of 0.03 should be adequate for the majority of line and load
conditions.
For a setting of 0 , IGBT quiescent current will be minimal. During regeneration, Input line
current will initially rise slowly, then increase quickly at the conduction period. The resultant
current waveform for a fully loaded unit during regeneration will be more triangular.
Increasing the setting to 0.06 will result in increasing the quiescent current and reducing the
DC bus voltage. At the beginning of conduction period, input line current will initially rise
quickly, then increase slowly. The resultant current waveform for a fully loaded unit during
regeneration will now be more rectangular.
l t s A c t . o u s V B
0 V O L T 5 . 7 3 5
n g l e C o n s t A o n d C
0 9 5 0 .
A n g l C o n s t h i f t S
3 1 0 0 0 .