| 摘要 |
PCT No. PCT/JP97/04767 Sec. 371 Date Jun. 25, 1999 Sec. 102(e) Date Jun. 25, 1999 PCT Filed Dec. 24, 1997 PCT Pub. No. WO98/29937 PCT Pub. Date Jul. 9, 1998A PWM converter includes a power source current detector (9), current instruction generator (7), current controller (6) and a main circuit power control section (8), and the current controller is constituted of comparators (17, 18, 19) which compare the line current measurement results with the line current instruction values, and a logic circuit (10) which generates switching instruction signals (PU, PV, PW) based on the comparison results with use of timing signals so that the switching power devices (Q1-Q6) are selectively turned ON and OFF in the direction of reducing the difference between the line current measurement results and the line current instruction values, and thus essentially solves the prior art problems associated with gain adjustment of current error amplifiers, which is completely adjustment-free and yet inexpensive.
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