| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a load commutation type inverter device which can assure output voltage accuracy in a wide control range even if a load is changed and which can be operated stably. <P>SOLUTION: The load commutation type inverter device includes a rectifier 1 for converting an AC to a DC, an inverter 3 for converting the DC converted by the rectifier into the AC to supply the AC to a load coil, a control means 10 for controlling the rectifier, a voltage detecting means for detecting the output voltage of the inverter, and a current detecting means for detecting the output current of the inverter. The control means has a voltage control circuit for operating to amplify the difference between the detected voltage of the voltage detecting means and a reference voltage, a current control circuit for operating to amplify the difference between the detected current of the current detecting means and a reference current, a high output priority circuit for comparing the output of the voltage control circuit with the output of the current control circuit to select a larger signal to decide the firing phase of the rectifier, and a voltage correcting means for correcting the input of the voltage control circuit according to the detected current of the current detecting means. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
