| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power supply controller of a vehicle, which PWM-controls an output voltage to supply it to an in-vehicle load and exerts no influence of voltage drop due to a resistance, etc. including in an electric wire on the operation state of the in-vehicle load.SOLUTION: A power supply controller of a vehicle calculates a duty ratio on the basis of an input voltage value from detected power sources 1,2 and a target voltage value to be applied to an in-vehicle load 10a, and PWM-controls the input voltage from the detected power sources 1,2 by the calculated duty ratio to apply it to the in-vehicle load 10a. The power supply controller of the vehicle includes: testing means 14a for experimentally PWM-controlling the input voltage by a plurality of different test target voltage values; a voltage sensor 11a for detecting a voltage value applied to an input terminal of the in-vehicle load 10a each time the testing means 14a PWM-controls with a different test target voltage value; and derivation means 14a for deriving a correction formula for correcting a target voltage value to be given to the in-vehicle load 10a on the basis of the voltage value detected by the voltage sensor 11a and the test target voltage value. The target voltage value is corrected by the derived correction formula.</p> |
