Abstract: A power circuit is provided that includes at least a first power supply unit and a second power supply unit. The first power supply unit includes a first input section, a first AC voltage generator, a first rectification-and-smoothing section, and a first isolation section that is provided between the first AC voltage generator and the first rectification-and-smoothing section. The second power supply unit includes a second input section, a second AC voltage generator, a second rectification-and-smoothing section, and a second isolation section that is provided between the second AC voltage generator and the second rectification-and-smoothing section. The power circuit is configured such that the second AC voltage generator generates an AC voltage having a phase obtained by inverting a phase of the AC voltage generated by the first AC voltage generator.

Abstract: A power circuit is provided that includes at least a first power supply unit and a second power supply unit. The first power supply unit includes a first input section, a first AC voltage generator, a first rectification-and-smoothing section, and a first isolation section that is provided between the first AC voltage generator and the first rectification-and-smoothing section. The second power supply unit includes a second input section, a second AC voltage generator, a second rectification-and-smoothing section, and a second isolation section that is provided between the second AC voltage generator and the second rectification-and-smoothing section. The power circuit is configured such that the second AC voltage generator generates an AC voltage having a phase obtained by inverting a phase of the AC voltage generated by the first AC voltage generator.

Abstract: A power supply device includes: a first power supply circuit capable of exerting control of both boosting and bucking; a second power supply circuit configured to be supplied with an output of the first power supply circuit and cause an output to be controlled in accordance with a frequency or a pulse width; and a control unit configured to control the first and second power supply circuits. The control unit is configured to execute control while switching between first control in which the output of the first power supply circuit is made variable and the output of the second power supply circuit is accordingly made variable, and second control in which the output of the first power supply circuit is made constant and the output of the second power supply circuit is set to a predetermined output.

Abstract: A power supply device includes: a first power supply circuit capable of exerting control of both boosting and bucking; a second power supply circuit configured to be supplied with an output of the first power supply circuit and cause an output to be controlled in accordance with a frequency or a pulse width; and a control unit configured to control the first and second power supply circuits. The control unit is configured to execute control while switching between first control in which the output of the first power supply circuit is made variable and the output of the second power supply circuit is accordingly made variable, and second control in which the output of the first power supply circuit is made constant and the output of the second power supply circuit is set to a predetermined output.