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Seite 5 von 11 

UHS-main-regulator 

The main-regulator regulates the high-side-voltage. For a functional operation, the following CAN-messages 
have to be set correctly: 

[SG_Sollwert]: 

 Value of the commanded high-side voltage. 

(Sollwert 

 engl.: desired value) 

[SG_HR_Mode_Check]:  

0x1 

 

Interpretation of the internal current measurement  

Boostmode 

 

Direction of current from LS to HS. 

 

Current measurements have a positive value. 

 

[BDC_ILS_act] & [BDC_IHS_act] > 0 
 
Responsible current-limit-regulators: 

 

IHS_MAX 

 [SG_IHS_max] > 0 

 

ILS_MAX 

 [SG_ILS_max] > 0 

Buckmode 

 

Direction of current from HS to LS. 

 

Current measurements have a negative value. 

 

[BDC_ILS_act] & [BDC_IHS_act] < 0 
 
Responsible current-limit-regulators: 

 

IHS_MIN 

 [SG_IHS_min] < 0 

 

ILS_MIN 

 [SG_ILS_min] < 0 

With the current-limit-regulators, the user can avoid an unexpected change of the mode. (Boostmode to 
buckmode or buckmode to boostmode.) 

Limit regulators 

On reaching one or more set limit-values, the device will regulate on this values under compliance of the 
regulator-priority. The device won

’t switch off. 

 

 

Summary of Contents for BDC546-B

Page 1: ...BDC546 B Operating instructions Version 1 1...

Page 2: ...ate Name Comment 1 0 18 12 2012 M Haller Document released 1 1 05 01 2015 J Pitschi Update of some descriptions of CAN signals Update of value for the current regulators based on tolerances of the int...

Page 3: ...ators 5 Regulator priorities 6 Recommended current settings for BDC operation 6 Recommended BDC settings for a test assembly 7 Recommended BDC settings for operation fuel cell to battery 7 Recommended...

Page 4: ...nge ULS_MAX 600V CAN error is set if the value is out of the range UHS_MIN 0V CAN error is set if the value is out of the range UHS_MAX 750V CAN error is set if the value is out of the range ILS_MIN 0...

Page 5: ...ue BDC_ILS_act BDC_IHS_act 0 Responsible current limit regulators IHS_MAX SG_IHS_max 0 ILS_MAX SG_ILS_max 0 Buckmode Direction of current from HS to LS Current measurements have a negative value BDC_I...

Page 6: ...r 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 bu...

Page 7: ...IHS_MAX_2 2 prevention of boostmode HS and LS voltage limit regulators have to be set according to the fuel cell and battery specifications BDC546 ILS_MIN active UHS_MAX SG_UHS_max IHS_MAX SG_IHS_max...

Page 8: ..._2 IHS_MIN_1 Recommendation IHS_MAX_2 ILS_MAX_2 IHS_MIN_2 2 prevention of boostmode BDC_1 UHS_COM_1 UHS_COM_2 ILS_MIN_1 ILS_MAX_2 ILS_MAX_1 2 prevention of buckmode IHS_MIN_1 IHS_MAX_2 Recommendation...

Page 9: ...S overvoltage detection ULS 600V is active Inadvertent operating mode changes from boost to buckmode can be avoided by setting ILS_MIN and or IHS_MIN to zero See chapter Recommended BDC operating sett...

Page 10: ...UHS_MIN Device in buckmode BDC regulates UHS_COM till UHS UHS_MIN Then the BDC regulates on UHS_MIN as well Condition UHS_COM UHS_MAX Device in buckmode BDC regulates UHS_MAX Device in boostmode BDC r...

Page 11: ...ator is active BDC_IHS_max_Lim Information if the IHS_MAX regulator is active BDC_ULS_min_Lim Information if the ULS_MIN regulator is active BDC_ULS_max_Lim Information if the ULS_MAX regulator is act...

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