| 摘要 |
<p>In order to realize a rectifier circuit device capable of attaining both reduction of power-supply harmonics and reduction of circuit losses, AC-voltage phase detection means 201, AC electric-current detection means 103 and DC-voltage detection means 110 are provided, and chopping is performed on a semiconductor switch 104 in such a way as to follow a desired electric-current waveform. A DC voltage is adjusted such that a phase at which the chopping is halted comes to be a desired phase. Also, when the phase width within which the chopping is continued is less than a set value, the DC voltage is adjusted preferentially such that the phase width within which the chopping is continued comes to be the set value. A target electric-current waveform has a combination of a monotonous increase and a constant value within the former half the period of an AC power supply and, also, has a value of zero in an interval within the latter half thereof.</p> |
