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.OMINAL6OLTAGE
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-USTBESETTOTHEVEHICLESNOMINALBATTERYPACKVOLTAGE4HISPARAMETER
.OMINAL?6OLTAGE
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ISUSEDINDETERMININGTHEOVERVOLTAGEANDUNDERVOLTAGEPROTECTIONTHRESHOLDS
FORTHEELECTRONICSYSTEM
/VERVOLTAGEPROTECTIONCUTSBACKREGENBRAKINGTOPREVENTDAMAGE
TOBATTERIESANDOTHERELECTRICALSYSTEMCOMPONENTSDUETOOVERVOLTAGE
5NDERVOLTAGEPROTECTIONPREVENTSSYSTEMSFROMOPERATINGATVOLTAGESBELOW
THEIRDESIGNTHRESHOLDS
4HEFOURTHRESHOLDPOINTSARECALCULATEDFROMTHE.OMINAL6OLTAGE5NDER
VOLTAGE#UTBACK2ANGE5SER/VERVOLTAGEAND5SER5NDERVOLTAGEPARAMETER
SETTINGSANDTHECONTROLLERSMINIMUMVOLTAGEANDMAXIMUMVOLTAGERATINGS
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/VERVOLTAGE%ITHER-AX6OLTAGESEEVOLTAGERATINGSTABLE
OR
5SER/VERVOLTAGE
×
.OMINAL6OLTAGEWHICHEVERISLOWER
3EVERE/VERVOLTAGE/VERVOLTAGESEEPREVIOUSITEM 6
5NDERVOLTAGE%ITHER-IN6OLTAGESEEVOLTAGERATINGSTABLE
OR
5SER5NDERVOLTAGE
×
.OMINAL6OLTAGEWHICHEVERISHIGHER
3EVERE5NDERVOLTAGE5NDERVOLTAGEPOINTn5NDERVOLTAGE#UTBACK2ANGE
4HE"ROWNOUT6OLTAGEISDETERMINEDBYTHECONTROLLERBASETYPEANDCANNOT
BECHANGED7HENTHECAPACITORVOLTAGEFALLSBELOWTHE"ROWNOUTVOLTAGE
THEBRIDGEISSWITCHEDOFFIEMOTORCURRENTISSWITCHEDOFF )FTHECAPACITOR
VOLTAGESTAYSBELOWTHE"ROWNOUTVOLTAGEFORMSECTHECONTROLLERWILLRESET
EQUIVALENTTOCYCLINGTHEKEYSWITCH )FTHECAPACITORVOLTAGERISESABOVETHE
"ROWNOUTVOLTAGEBEFOREMSECHAVEPASSEDTHEBRIDGEWILLBEREENABLED
4HE3EVERE5NDERVOLTAGEPOINTCANBESETLOWERTHANTHE"ROWNOUTVOLTAGE
5NDERVOLTAGE#UTBACK2ANGE
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4HISPARAMETERSETSTHEVOLTAGERANGEBETWEENTHE5NDERVOLTAGEAND
5NDERVOLTAGE?#UTBACK?2ANGE
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3EVERE5NDERVOLTAGEPOINTSSEE.OMINAL6OLTAGEDESCRIPTION
!3EVERE5NDERVOLTAGEFAULTWILLBESETIFTHECAPACITORVOLTAGEFALLS
BELOWEITHERTHE3EVERE5NDERVOLTAGEPOINTDRIVECURRENTLIMITSETTO OR
THE"ROWNOUTVOLTAGEBRIDGEDISABLEDMOTORCURRENTSETTO
5SER/VERVOLTAGE
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4HEVALUEOFTHISPARAMETERISAPERCENTAGEOFTHE.OMINAL6OLTAGESETTING
5SER?/VERVOLTAGE
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4HE5SER/VERVOLTAGEPARAMETERCANBEUSEDTOADJUSTTHEOVERVOLTAGE
THRESHOLDWHICHISTHEVOLTAGEATWHICHTHECONTROLLERWILLCUTBACKREGEN
BRAKINGTOPREVENTDAMAGETOTHEELECTRICALSYSTEM
4YPICALLYTHISPARAMETERISCHANGEDONLYWHENTHECONTROLLERISBEING
USEDINANAPPLICATIONATTHELOWENDOFTHECONTROLLERSRANGESUCHAS
An6CONTROLLERBEINGUSEDINASYSTEMWITHA6BATTERYPACK)N
THISCASETHEOVERVOLTAGETHRESHOLDCANBERAISEDBYSETTINGTHE5SER
/VERVOLTAGETOAHIGHERVALUE4HEOVERVOLTAGETHRESHOLDCANNEVERBE
RAISEDABOVETHECONTROLLERSPOWERBASEMAXIMUMVOLTAGERATING