Vehicle buck power conversion control apparatus and method

摘要

The present invention relates to a vehicle buck power conversion control apparatus and method, which improves control performance of power conversion even when load current is changed by further considering input current varied according to the load current in controlling a pulse width modulation signal by using an existing fixed chopping wave.

主权项

1. An apparatus for controlling buck conversion of a vehicle when load current is increased or decreased, the apparatus comprising:
a power converter configured to convert a high voltage of a high voltage battery to a low voltage, the power converter having an input current that varies according to the increase or the decrease in the load current; a voltage comparator configured to perform a first comparison comprising comparing a low voltage output value of the power converter to a preset reference voltage; an output controller configured to generate an output, and increase or decrease the generated output based on a comparison result of the first comparison; and a comparison controller configured to control an operation of a pulse width modulation (PWM) signal by
performing a second comparison comprising comparing the generated output to a value obtained by multiplying a chopping wave by a value resulting from dividing the input current by a number N, the number N having a value that is greater than 1, andincreasing or decreasing an On time of the PWM signal based on a comparison result of the second comparison.