| 摘要 |
PURPOSE:To improve the power factor and to prevent the harmonic waves from generating by controlling the current controlled by a power source side inverter by a sinusoidal current reference synchronized with the power source voltage waveform. CONSTITUTION:Signals from a setter 37 and a voltage detector 38 are inputted to a voltage control amplifier 39, the output signal 39a is multiplied by multipliers 41a, 41b, 41c by signals 40a, 40b, 40c from a 3-phase sinusoidal wave generator 40 for generating 3-phase sinusoidal reference of R, S, T synchronized with an AC power source 36. The output signals 42a, 42b, 42c of current control amplifiers 42A, 42B, 42C are compared and detected by a comparator 45 with the output modulation signal 44a of a sawtooth wave generator 44, and output- ted as signals 45a-45f for deciding the switching timing of the transistors of the power source side inverter 35. |
