Power Voltage Variable Control System System Description

SYSTEM

POWER VOLTAGE VARIABLE CONTROL SYSTEM : System Description


SYSTEM DIAGRAM







HPCM INPUT/OUTPUT SIGNAL ITEMS

Input Signal Item






Output Signal Item






SYSTEM DESCRIPTION

The power voltage variable control system reduces the electric power consumption from the Li-ion battery by varying the DC/DC converter output in a range from 13 V to 15 V according to the use status of electric equipment and the 12V battery status.

CAUTION:
When the 12V battery is deeply discharged and at similar times, the output voltage may be 13 V or less.

VARIABLE VOLTAGE CONTROL

Based on the request signals from the ECM and electrically-driven intelligent brake unit, HPCM determines the target power generation voltage value and transmits the power generation command signal to the DC/DC
converter. The DC/DC converter adjusts the power generation voltage to the target power generation voltage based on the received power generation command signal.
NOTE:
If the vehicle electrical equipment load increases and the output voltage decreases, the DC/DC converter temporarily stops the supply of power to the climate controlled seat control unit to maintain the optimal voltage.