Patent ID: 11863063
Assignee: TOSHIBA MITSUBISHI—ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A power conversion system comprising:
a power converter connected to an alternate-current power supply;
a direct-current capacitor connected to a direct-current side of the power converter;
a first alternate-current switch connected between the power converter and the alternate-current power supply;
an inrush current suppressor connected in parallel to the first alternate-current switch, between the power converter and the alternate-current power supply, the inrush current suppressor including a charging resistance or a charging reactor;
a second alternate-current switch connected in parallel to the first alternate-current switch and in series to the inrush current suppressor, between the power converter and the alternate-current power supply;
an alternate-current capacitor connected on the power converter side relative to the first alternate-current switch, the inrush current suppressor and the second alternate-current switch, between the power converter and the alternate-current power supply; and
a control device configured to control the power converter so that the first alternate-current switch is open, the second alternate-current switch is closed and subsequently the voltage applied to the direct-current capacitor reaches a voltage that is equal to or exceeds the preset voltage, subsequently controls the power converter so that the voltage applied to the alternate-current capacitor substantially equals a voltage of the alternate-current power supply, and subsequently closes the first alternate-current switch.