发明名称 POWER SUPPLY CIRCUIT AND ITS PAM CONTROL METHOD
摘要 PROBLEM TO BE SOLVED: To provide a power supply circuit for executing PAM (power amplitude modulation) control by using a switching element, which achieves compaction and cost reduction of a capacitor by preventing an increase in a ripple voltage of a capacitor in a smoothing circuit. SOLUTION: The power supply circuit includes a bridge circuit (12) of diodes (D1-D4) for rectifying AC power, and two capacitors (C1, C2) connected in series to each other. The power supply circuit includes a smoothing circuit (13) connected to an output side of the bridge circuit (12) and a PAM control section (15) for switching a switching element (S) at a predetermined timing. The PAM circuit (15) includes a phase difference detecting circuit (15d) for detecting the deviation in phase of a PAM waveform on the basis of a change in voltage difference of the two capacitors (C1, C2), and a phase correcting section (15e) for correcting the phase of the PAM waveform so that an input current may approximate to a sinusoidal wave. COPYRIGHT: (C)2009,JPO&INPIT
申请公布号 JP2008253094(A) 申请公布日期 2008.10.16
申请号 JP20070093584 申请日期 2007.03.30
申请人 DAIKIN IND LTD 发明人 NAKAMOTO MAKOTO;HASHIMOTO MASAFUMI;SHIMATANI KEISUKE;YOSHIZAKA KEIICHI;KATO MASAKAZU
分类号 H02M7/12 主分类号 H02M7/12
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