APPARATUS AND METHOD FOR ESTIMATING OUTPUT VOLTAGE OF SINGLE DC/DC BUCK CONVERTER

• Main Authors: KIM, JAE HEUNG, LEE, HYUN GUK, KU, HYUN KEUN, KIM, DONG YOUN, KIM, JANG MOK
• Format: Patent
• Language: English; Korean
• Published: 13.02.2014
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The present invention relates to a device and a method for estimating an output voltage of a single phase DC/DC buck converter. The device for estimating an output voltage of a single phase DC/DC buck converter according to an aspect of the present invention comprises a single DC/DC buck converter being modeled by including a switch which has one end connected to input power and turns on/off according to a pulse width modulation signal, a diode which has one end connected to the other end of the switch and the other end grounded, an inductor which has one end connected to the other end of the switch, a capacitor which has one end electrically connected to the other end of the inductor and the other end grounded, and load resistance connected to the capacitor in parallel; a current sensor unit for measuring a current flowing in the inductor; a current sampling unit for setting a sampling time point based on the pulse width modulation signal and acquiring the size of a current value of the current flowing in the inductor with regards to the sampling time point; and an estimation unit for calculating an estimation value of an output voltage by multiplying the predetermined load resistance value with the size of the current value of the current flowing in the inductor. [Reference numerals] (300) Current sampling unit; (400) Estimation unit