| 摘要 |
PURPOSE:To enhance the efficiency by connecting in parallel the output terminals of smoothing circuits of a plurality of resonance type constant-current converters so that the output current share of the converters becomes uniform. CONSTITUTION:Resonance type constant current converters CONV1'-CONVn' are connected in parallel through diodes D11-Dn1, a common current detector 10 is provided to detect the current of the common connector, and an error amplifier 11 for calculating an error signal for the reference current of a current detected by the detector 10 is provided. The output of the amplifier 11 is supplied through a current detector 9 and a V/F converter 7 to an inverter 1 as a frequency control signal. |
