ELECTRIC POWER CONVERTER

摘要

An electric power converter is equipped with a master converter and a slave converter that are connected in parallel with each other, and to a load. The master converter operates having priority over the slave converter. The slave converter includes a voltage sensor for detecting an output voltage of the electric power converter and a control unit for controlling an output of the slave converter based on a target command value. The control unit selects a current command value Ic2 received from the master converter as a target command value when a variation ΔV per predetermined time of a detected output voltage Vo2 is lower than a variation ΔVth1. The control unit selects a voltage command value Vc2a calculated so as to suppress the output voltage Vo2 from changing as the target command value when the variation ΔV exceeds the variation ΔVth1.

主权项

1. An electric power converter comprising:
a first DC/DC converter and a second DC/DC converter that are connected in parallel with each other, and to a load; wherein, the first DC/DC converter operates having priority over the second DC/DC converter; the second DC/DC converter includes a voltage detecting unit for detecting an output voltage of the electric power converter and a control unit for controlling an output of the second DC/DC converter based on a target command value; wherein, the control unit selects a current command value received from the first DC/DC converter as the target command value when an amount of change per predetermined time of the output voltage detected by the voltage detecting unit is equal to or less than a first threshold value; and the control unit selects a first voltage command value calculated so as to suppress the output voltage from changing as the target command value when the amount of change of the output voltage exceeds the first threshold value.