Abstract: The present disclosure relates to a magnetic component and an integrated magnetic assembly. The magnetic component includes a magnetic core set, a primary winding, a first secondary winding, a second secondary winding and a tertiary winding. The magnetic core set includes a central column, a first and a second lateral column. The first lateral column includes a first leg and a second leg. The second lateral column includes a third leg and a fourth leg. A first segment of the tertiary winding is wound on one of the first leg and the second leg, and a second segment of the tertiary winding is wound on one of the third leg and the fourth leg. The two lateral columns are divided into two legs respectively to achieve partial coupling through the tertiary winding. Consequently, the advantages of adjustable and enhanced coupling coefficient, reduced loss, saving footprint and enhanced performance are achieved.

Abstract: A bulk capacitor pre-charge control method includes providing a power converter coupled between a power source and a bulk capacitor, in a first pre-charge period, activating one switch selected from switches of the first rectifier and the second rectifier to charge the bulk capacitor, in a second pre-charge period following the first pre-charge period, activating two switches selected from the switches of the first rectifier and the second rectifier to charge the bulk capacitor, and in a third pre-charge period following the second pre-charge period, activating three switches selected from the switches of the first rectifier and the second rectifier to charge the bulk capacitor, wherein two of the three switches are synchronized with each other.

Abstract: A resonant converter is provided. The resonant converter includes a primary circuit, an integrated transformer, a secondary circuit, a local ground, a first Y capacitor and a second Y capacitor. The primary circuit has a first positive line and a first negative line. The integrated transformer is electrically connected to the primary circuit. The secondary circuit is electrically connected to the integrated transformer and has a second positive line and a second negative line. The first Y capacitor is coupled between the local ground and the first positive line or the first negative line of the primary circuit. The second Y capacitor is coupled between the local ground and the second positive line or the second negative line of the secondary circuit. The first Y capacitor, the second Y capacitor and the local ground are configured to circulate common mode noise currents between the primary circuit and the secondary circuit.

Abstract: A DC-DC power supply and a transformer assembly are provided. The DC-DC power supply includes primary and secondary circuits and M transformer sets electrically connected in parallel between the primary and secondary circuits. Each transformer set includes N transformers, where M and N are positive integers. Each transformer includes first and second primary windings and first and second secondary windings. A connection node of the first and second secondary windings is electrically connected to an output capacitor of the secondary circuit, and each secondary winding is electrically connected to a corresponding secondary switch of the secondary circuit. The first and second primary windings in each transformer set are electrically connected in series. All transformers are arranged along a first direction, and each transformer includes columns arranged along the first direction with each extending along a second direction perpendicular to the first direction.

Abstract: The present disclosure provides a control method of a converter system. The control method includes steps of: (a) performing a soft start control by the controller until a voltage of the blocking capacitor reaches half of a voltage of the DC voltage source; (b) performing an output current control loop and a voltage balancing loop for obtaining a first phase shift and a second phase shift by the controller; and (c) utilizing the first phase shift and the second phase shift for controlling the plurality of inverter switches and the plurality of rectifier switches.

Abstract: The present disclosure provides a converter module having at least a first converter and a second converter. In one aspect, the first converter includes first primary side circuitry having first primary side switches, first secondary side circuitry having a first current doubler and first secondary side switches, the first current doubler including a first pair of inductors having first secondary windings integrated in a first core, and a first transformer coupled to the first current doubler. The second converter includes a second primary side circuitry having second primary side switches, second secondary side circuitry having a second current doubler and second secondary side switches, the second current doubler including a second pair of inductors having second secondary windings integrated in a second core, and a second transformer coupled to the second current doubler.

Abstract: A resonant converter is provided. The resonant converter includes a DC common mode choke and a resonant tank. The DC common mode choke includes two capacitive components. The resonant inductor group includes a first resonant inductor and a second resonant inductor. The first resonant inductor and the second resonant inductor are equal. Two sides of the resonant capacitor group are connected with the first resonant inductor and the second resonant inductor, respectively. The resonant capacitor group includes two resonant capacitors in series. A balancing condition is met when a first ratio between two inductances of the DC common mode choke and the first resonant inductor and a second ratio between capacitances of the two capacitive components are equal.

Abstract: A bidirectional AC-DC power supply is provided. The bidirectional AC-DC power supply includes a plurality of primary circuits, a plurality of transformers, one secondary circuit and a control circuit. The plurality of primary circuits are electrically connected to a plurality of phase voltages of an AC power respectively. The plurality of transformers are electrically connected to the plurality of primary circuits respectively. A primary winding of each transformer is coupled to a corresponding one of the plurality of primary circuits, and a plurality of secondary windings of the plurality of transformers are electrically connected in series. The secondary circuit is electrically connected to the plurality of secondary windings of the plurality of transformers. The control circuit is configured to control switches of the plurality of primary circuits and the secondary circuit to switch under zero voltage by controlling phase shifts of the switches of the plurality of primary circuits.