A power conversion device connected in parallel to a second power conversion device including power conversion circuitry that performs power conversion by changing a connection state between first multiple lines on a primary side and second multiple lines on a secondary side, baseline selection circuitry that selects one of the second multiple lines on the secondary side as a baseline and partial modulation control circuitry that controls the power conversion circuitry to maintain a state in which the baseline is connected to one of the first multiple lines on the primary side and to change a connection state between other second multiple lines on the secondary side and the first multiple lines on the primary side, wherein the baseline selection circuitry switches a line selected as the baseline based on a switching timing used by second baseline selection circuitry of the second power conversion device to select a second baseline.

A charging power system with low standby power consumption includes a system control unit and a plurality of charging modules. The charging modules are electrically connected in parallel and receive an input power source. Each charging module includes an auxiliary power supply unit, a power conversion unit, and a charging module control unit. When the charging modules enter standby conditions, the system control unit produces auxiliary control signals and the charging module control units produce main control signals to correspondingly control the auxiliary power supply units to stop outputting auxiliary power. Accordingly, it is to reduce standby power consumption and increase overall efficiency of the charging power system.

At least one example embodiment is directed to a method for controlling a rectifier. The method includes applying a first control signal to a first switch of the rectifier to cause a first current to flow through a first inductor of the rectifier, applying a second control signal to a second switch of the rectifier to cause a second current to flow through a second inductor. The second control signal and the first control signal have a phase difference. The method includes detecting that the first current falls to a first minimum value at a first time, detecting that the second current falls to a second minimum value at a second time, determining a first difference between the first time and the second time, and determining whether to adjust the second control signal based on the first difference to bring the phase difference closer to a target phase difference.

A rectification circuit rectifies an alternating current voltage of an alternating current power supply. A parallel converter comprises converters that correspond to phases and that are connected in parallel to an output terminal of the rectification circuit. Each converter comprising a reactor, a switching circuit that is connected in series to the reactor and a diode that is connected in series to the reactor. A smoothing capacitor is connected to an output terminal of the parallel converter. A control circuit generates pulse signals corresponding to phases based on an error voltage between an output voltage of the smoothing capacitor and a reference voltage and on an output voltage of the rectification circuit, and switches the switching circuits in the converters using the pulse signals. Current detection circuits are provided corresponding to the converters and that detect currents flowing through the switching circuits.

A rectification circuit rectifies an alternating current voltage of an alternating current power supply. A parallel converter comprises converters that correspond to phases and that are connected in parallel to an output terminal of the rectification circuit. Each converter comprising a reactor, a switching circuit that is connected in series to the reactor and a diode that is connected in series to the reactor. A smoothing capacitor is connected to an output terminal of the parallel converter. A control circuit generates pulse signals corresponding to phases based on an error voltage between an output voltage of the smoothing capacitor and a reference voltage and on an output voltage of the rectification circuit, and switches the switching circuits in the converters using the pulse signals. Current detection circuits are provided corresponding to the converters and that detect currents flowing through the switching circuits.

A control method implemented for an electric motor control installation, the control installation including a first converter having controlled switching arms for applying first voltage edges to a first electric motor connected to the first converter by first output phases, a second converter having controlled switching arms for applying second voltage edges to a second electric motor connected to the second converter by second outlet phases, the control method including a step of synchronising first voltage edges with second voltage edges in order to minimise the common-mode currents generated by the installation.

A power factor correction (PFC) power converter, particularly of a multiphase totem-pole or other topology presenting a switching bridge that can potentially provide bi-directional power transfer control, reduces a nominal switching frequency and achieves zero voltage switching over an increased portion of a half line cycle by providing positive or inverse coupling of inductors in an inductor structure that can be formed of a multi-layer printed circuit board such that at least three different inductances are presented during each half line cycle period; allowing increased switching frequency and simplifying EMI filtering arrangements. Parasitic capacitances can be balanced with additional coupled windings to reduce differential mode and common mode noise. The PFC power converter is particularly applicable to provide bi-directional power control from an on-board battery charger in an electrically powered vehicle.

Voltage converter circuits including a first and second branch. The first branch is coupled between a first DC terminal and a second DC terminal and includes a first and second winding around a magnetic core. The first and second winding are coupled to an AC terminal via a common node. The second branch is coupled in parallel to the first branch between the first and second DC terminals and includes a third winding around the magnetic core. The third winding is coupled to the AC terminal such that the first and second branches convert a first voltage into a second voltage. The first, second and third windings are configured to cause magnetic flux generated by a differential mode (DM) component of a first current in the first branch and magnetic flux generated by the DM component of a second current in the second branch to enhance with each other.

Voltage converter circuits including a first and second branch. The first branch is coupled between a first DC terminal and a second DC terminal and includes a first and second winding around a magnetic core. The first and second winding are coupled to an AC terminal via a common node. The second branch is coupled in parallel to the first branch between the first and second DC terminals and includes a third winding around the magnetic core. The third winding is coupled to the AC terminal such that the first and second branches convert a first voltage into a second voltage. The first, second and third windings are configured to cause magnetic flux generated by a differential mode (DM) component of a first current in the first branch and magnetic flux generated by the DM component of a second current in the second branch to enhance with each other.

A power converter, includes a first terminal and a second terminal which are connected to a direct current; a third terminal connected to an alternating current; N multi-level bridge arms connected in parallel to the first terminal and the second terminal, where the N multi-level bridge arms work in a parallel-interleaved manner, each multi-level bridge arm of the N multi-level bridge arms includes an alternating current node, and multiple time-varying levels are generated at the alternating current node, where the multiple levels are more than two levels; and a coupling inductor, including N windings coupled by one common magnetic core, where one end of each winding of the N windings is connected to an alternating current node of one multi-level bridge arm of the N multi-level bridge arms, and the other end of each winding of the N windings is connected to the third terminal.