| 摘要 |
PROBLEM TO BE SOLVED: To provide a vehicular power supply control system that exerts a large effect on reduction of power consumption and can implement PWM control at a frequency at which a load works comfortably for a user.SOLUTION: A vehicular power supply control system allows switching elements 10 to 12 to implement PWM control on the basis of detected voltage values of onboard power supplies 1 and B so that the voltages of the onboard power supplies 1 and B take on a predetermined voltage value at a predetermined frequency, and to apply the voltages to loads 13 to 15. The vehicular power supply control system includes pieces of detection means 7 to 9 that detect power values to be consumed by the respective loads 13 to 15, memory means 23a that stores lower limits of a PWM frequency predefined in association with the power values that should be detected, and frequency characteristics of switching losses of the switching elements 10 to 12 associated with the power values the pieces of detection means 7 to 9 should detect, and selection means 23 that references the lower limits and the frequency characteristics in the memory means 23a on the basis of the power values detected by the pieces of detection means 7 to 9, and selects a frequency, at which the switching elements 10 to 12 implement PWM control, from among frequencies equal to or larger than the lower limit. |
