| 摘要 |
<p>Provided is an inverter control system that requires low computational load and achieves reduction in size, cost, and loss. An LPF extracts a DC component of a current detection value of an inverter input current, a subtraction unit (4) calculates a difference between a current command value and the DC component of the current detection value, and a current control unit (5) generates from the current difference two-phase PWM signals (Sa, Sb), which are complementary to each other. Further, an integration circuit (7) integrates inverter output terminal voltages (Vu, Vv, Vw) to convert the inverter output terminal voltages (Vu, Vv, Vw) into magnetic flux information (fu, fv, fw), and a logic conversion unit (8) performs logic conversion on the magnetic flux information (fu, fv, fw) to output 120°electricity feeding patterns (S1'-S6'). Then, a logic circuit unit (9) synthesizes logically the PWM signals (Sa, Sb) and the 120°electricity feeding patterns (S1'-S6') to output gate signals (S1-S6).</p> |
