| 摘要 |
PROBLEM TO BE SOLVED: To accurately perform correction by connecting a series resonance circuit of a main capacitor and a reactor to an AC power line, connecting a variable capacitor in parallel with the reactor, and continuously varying the capacitance of the variable capacitor for correcting the deviation of the resonance frequency. SOLUTION: A series resonance circuit 7 of a main capacitor 5 with a constant capacity and a reactor 6 with a constant inductance is connected to an AC power line 4, and a variable capacitor 8 for adjusting the resonance frequency is connected in parallel with the reactor 6. The main capacitor 5 and the reactor 6 set capacitance and inductance so that the series resonance frequency reaches the 11-th harmonic frequency. The capacitance of the variable capacitor 8 is varied continuously, and the deviation of the resonance frequency of the series resonance circuit 7 is automatically corrected, thus continuously varying the resonance frequency and accurately correcting the deviation of the resonance frequency. |
