To perform optimum ZCIH control by actualizing current amplitude control and current synchronizing control in a lamp, with respect to each power supply unit.
When performing the current amplitude control and the current synchronization control of an inverter 18, a dq control method is used for independently controlling dq components of a current and voltage, separately. A dq operation part 71 finds a d-axis current component Id and a q-axis current component Iq from the output current (i) of the inverter 18. An adder 72 finds a current difference between a target current Io and the d-axis current component Id, and a PI control part 74 finds a d-axis voltage component Vd from the current difference. The PI control part 75 finds a q-axis voltage component Vq so that the adder 73 sets the q-axis current component Iq to be zero. The d-axis voltage component Vd and the q-axis voltage component Vq are converted into a current-carrying width δ and a voltage phase angle θ by a dq-δθ conversion part 76 and is transmitted to the inverter 18. The inverter 18 performs the current amplitude control and the current synchronization control by the current-carrying width δ and the voltage phase angle θ, respectively.
OKAZAKI YOSHIHIRO
OZAKI KAZUHIRO
FUJITA HIDEAKI
HA PHAM NGOC
TOKYO INST TECH
| JP2004146283A | 2004-05-20 | |||
| JP2008243546A | 2008-10-09 | |||
| JP2007026750A | 2007-02-01 | |||
| JPH0947664A | 1997-02-18 | |||
| JP2007274829A | 2007-10-18 | |||
| JP2000116174A | 2000-04-21 | |||
| JPH11215602A | 1999-08-06 | |||
| JP2004146283A | 2004-05-20 |
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