단일단 교류 전력변환기를 이용한 자동 교류 전압조정기-Automatic AC Voltage Regulator using the Single-Stage AC Power Converter Gang-Youl Jeong*

 

단일단 교류 전력변환기를 이용한 자동 교류 전압조정기 정 강 률* Automatic AC Voltage Regulator using the Single-Stage AC Power Converter Gang-Youl Jeong* Journal of KIIT. Vol. 20, No. 11, pp. 73-83, Nov. 30, 2022. pISSN 1598-8619, eISSN 2093-7571 73 

 Abstract 

This paper presents the automatic AC voltage regulator using the single-stage AC power converter. The proposed automatic AC voltage regulator uses a pulse-width modulation(PWM) type non-isolated single-stage step-up/down AC power converter to control and maintain the level of AC voltage on the output-side to a desired level. Since the proposed voltage regulator controls the magnitude of output voltage by using only the average of the scaling values of the output voltage fed back by a simple voltage feedback circuit without phase synchronization, the control method of output voltage is simple. Thus, the proposed voltage easily controls the entire system using a single-chip microcontroller. In this paper, first, the operating principle of the power converter of proposed voltage regulator is briefly explained, and then the feedback and control method of output voltage are described. The feasibility and operating characteristics of proposed voltage regulator are verified through the experimental results of prototype. The proposed voltage regulator can control and maintain the output-side AC voltage to a desired level by performing the step-up/down control operation accurately, and shows a fast dynamic response characteristic.

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