| 摘要 |
PURPOSE:To reduce the fluctuation of power-receiving point voltage by bringing currents fed to a load to the state of phase advancing and adjusting the phase angle of the currents in response to effective load currents. CONSTITUTION:An automatic power-factor control system is composed of a power-factor computing element PF while the automatic power-factor control system is constituted so as to be corrected by a power-factor correction computing element CEC in response to the magnitude of effective load. An output from the power-factor correction computing element CEC is brought to zero when effective load is brought to zero, the output from the power-factor correction computing element CEC is augmented with the increase of effective load, and a power factor is corrected, thus keeping power-receiving point voltage V at a fixed value. |
