×

Power supply controller

  • US 8,669,673 B2
  • Filed: 11/10/2008
  • Issued: 03/11/2014
  • Est. Priority Date: 11/28/2007
  • Status: Expired due to Fees
First Claim
Patent Images

1. A power supply control apparatus for controlling a primary power supply apparatus;

  • a step-up circuit which steps up an output voltage of the primary power supply apparatus and outputs the stepped up voltage to a drive circuit for an electric actuator; and

    a secondary power supply apparatus which is connected in parallel to a line between the step-up circuit and the drive circuit, into which electric power output from the step-up circuit is charged, and which supplements the supply of electric power to the drive circuit while using the charged electric power, the power supply control apparatus comprising;

    charged amount detection means for detecting an amount of electricity charged into the secondary power supply apparatus; and

    charge/discharge control means for controlling charging and discharging of the secondary power supply apparatus by controlling the step-up circuit to adjust a magnitude of the stepped-up voltage output therefrom on the basis of the detected charged amount and a target charged amount, wherein,when the detected charged amount is less than the target charged amount and a power consumption of the drive circuit is less than an available electric power output of the step-up circuit, the charge/discharge control means controls the step-up circuit to adjust the magnitude of the stepped-up voltage such that the stepped-up voltage becomes higher than a power supply voltage of the secondary power supply apparatus, andwhen the detected charged amount is less than the target charged amount and a power consumption of the drive circuit is equal to or greater than an available electric power output of the step-up circuit, the charge/discharge control means controls the step-up circuit to adjust the magnitude of the stepped-up voltage such that the stepped-up voltage becomes equal to the power supply voltage of the secondary power supply apparatus.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×