| Improved Input Voltage Sensorless Control of Three-Phase AC/DC PWM PFC Converter using Virtual Flux Observer |
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Young-Sam Kim, Sang-Ho So |
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Doosan DST |
| 가상자속관측기를 이용한 3상 AC/DC PWM PFC 컨버터의 입력전압 센서리스 제어 개선 |
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김영삼, 소상호 |
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두산DST |
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| Abstract |
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In this paper, direct power control system for three-phase PFC AC/DC converter without the source voltage sensors is proposed. The sinusoidal input current and unity effective power factor are realised based on the estimated flux in the observer. Both active and reactive power calculated using estimated flux. The estimation of flux is performed based on the reduced-order virtual flux observer using the actual currents and the command control voltage. Moreover, source voltage sensors are replaced by a estimated flux. DC output voltage has been compensated by DC output ripple voltage estimation algorithm. The active and reactive powers estimation are performed based on the estimated flux and Phase angle. The proposed algorithm is verified through simulation and experiment. |
| Key Words:
Power Factor Correction, Direct Power Control, Sensorless, Virtual Flux Observer |
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