Patent ID: 11923776
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H  Y | IPC F  H

Claim 0:
1. A DC power supply device comprising:
a rectifier circuit to convert AC power into DC power;
a reactor connected at one end to one output terminal of the rectifier circuit;
a charging circuitry including a first switching element and a second switching element connected in series between another end of the reactor and another output terminal of the rectifier circuit, the charging circuitry being configured to charge a first capacitor and a second capacitor connected in series between output terminals to which a load is connected; and
a control circuitry to control the charging circuitry in synchronization with a timing at which a zero-crossing occurs in a line voltage of the AC power, wherein
the control circuitry sets, based on the timing at which the zero-crossing occurs, a dead time in which both the first switching element and the second switching element are off, and in response to states of the first switching element and the second switching element at a time of occurrence of the zero-crossing matching a predetermined set of states, the control circuitry reverses the states of the first switching element and the second switching element.