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Regulator priorities
The main-regulator is the high-side voltage regulator (U
HS_REG
). This regulator has the lowest priority.
The high-side-voltage-limit-regulators (U
HS_LIM
) have a higher priority than the low-voltage-limit-regulators
(U
LS_LIM
). This can result in an operation mode where ULS is getting higher than the set ULS_MAX (or lower
than ULS_MIN).
UHS_COM: The commanded voltage of the high-side-regulator.
UHS_REG: HS -voltage-regulator
main regulator
ULS_LIM: LS-over- and undervoltage-regulators. If ULS reaches this value, the device tries to
regulate to this value and to keep the operation.
UHS_LIM: HS-over- and undervoltage-regulators. If ULS reaches this value, the device tries to
regulate to this value and to keep the operation.
IHS_LIM: HS-current-regulator for buck- and boostmode where IHS_MAX is set for boostmode and
IHS_MIN is set for buckmode.
ILS_LIM: LS-current-regulator for buck- and boostmode where ILS_MAX is set for boostmode and
ILS_MIN is set for buckmode.
ILS_COM: The LS-current generated by the regulators. (This value is not set by CAN. It is an
internal generated value.)
Recommended current settings for BDC operation
Due to measurement tolerances a parametrization of the current regulators to zero in order to avoid a
change of operating direction may cause problems (especially at no load conditions). Therefore BRUSA
recommends to set the current regulators to MIN_CURRENT_LIM, whereby |MIN_CURRENT_LIM|
≥ 2A.
Recommended current setting
Boostmode:
IHS_MIN = ILS_MIN = -2 (to avoid Buckmode)
Buckmode:
IHS_MAX = ILS_MAX = 2 (to avoid Boostmode)
U
HS_Reg
U
LS_Lim
-Max
-Min
U
HS_Lim.
-Max
-Min
I
HS_Lim
-Max
-Min
I
LS_Lim
-Max
-Min
U
HS_com
I
LS_com
High
Low
[SG_Sollwert]
[SG_ULS_max]
[SG_ULS_min]
[SG_UHS_max]
[SG_UHS_min]
[SG_IHS_max]
[SG_IHS_min]
[SG_ILS_max]
[SG_ILS_min]
