A power source circuit and an application thereof are provided. A multi-phase AC power source is generated by means of a given AC power source by using an electromagnetic induction relationship between electrically conductive winding coils on a magnetically conductive iron core, routed through a multi-phase bridge rectifier circuit, and then directly used as a DC voltage source having a very small ripple factor to output DC voltage and current without capacitor filtering, thereby high-order harmonics caused by capacitor filtering are eliminated radically. In addition, the current in the multi-phase bridge rectifier circuit that is inputted from a power grid is a sine wave or a step wave that is very close to a sine wave, so that the high-order harmonics generated on an AC side is minimized without power factor correction.

An inverter apparatus has an n-phase bridge inverter circuit (where n=2k+1, and k is an integer greater than or equal to 2) and n iron cored winding coil combinations; the n-phase bridge inverter circuit is composed of n groups of unidirectional conductive electronic switch devices connected pairwise in series; and there is a definite electromagnetic induction relationship between the iron cored winding coils, so that a given DC power source generates an n-phase AC voltage source at n connection points of the n iron cored winding coil combinations and n series connection points of the n groups of unidirectional conductive electronic switch devices connected pairwise in series, wherein the n-phase AC power source refers to a group of n sine-wave voltage sources having equal amplitudes and having phases at an interval of 360?/n in sequence.

An in-vehicle charging device that includes an AC-DC converter that converts power between AC power on the external AC power supply side and first DC power on the first DC power supply side, and converts power between AC power on the external AC power supply side and second DC power on the second DC power supply side, wherein the AC-DC converter is a triple active bridge circuit including: a transformer including a primary-side coil, a secondary-side first coil, and a secondary-side second coil; a primary-side bridge circuit connected to the primary-side coil; a secondary-side first bridge circuit connected to the secondary-side first coil; and a secondary-side second bridge circuit connected to the secondary-side second coil, and the primary-side bridge circuit includes a bidirectional switching device.

A non-isolated symmetric self-coupling 18-pulse rectifier power supply system comprises a phase-shifting autotransformer, three circuits of output devices, a time sequence controller and a power output end. The phase-shifting autotransformer is provided with three groups of output ends and one group of input ends, and the output device in each circuit comprises a zero-sequence suppression reversing inductor, a three-phase uncontrolled rectifier bridge and a bidirectional switch BUCK converter, which are connected to each other in turn. The time sequence controller is provided with three groups of control ends which are respectively connected to the control end of the bidirectional switch BUCK converter in each circuit. The output end of the bidirectional switch buck converter in each circuit is connected to the power output end.

A rectifying-element-module sealing unit capable of suppressing adverse effects on a rectifying element module configuring a rectifier circuit is provided. The rectifying-element-module sealing unit includes a rectifying element module having a rectifying element, a first substrate in a plate shape having a first front surface and a first back surface and having the rectifying element module arranged on the first front surface, a second substrate in a plate shape having a second front surface and a second back surface and arranged with respect to the first substrate so that the second front surface is opposed to the first front surface, and a side wall portion forming, together with the first substrate and the second substrate, a sealed space having the rectifying element module arranged therein by covering areas open sideways between the first substrate and the second substrate.

A secondary-side rectifier of an inductive n-phase energy transmission system with N greater than or equal to 3, the energy transmission system including in each phase a resonant oscillating circuit, each resonant oscillating circuit including at least one inductor and at least one capacitor wherein secondary-side resonant oscillating circuits are magnetically coupleable to primary-side resonant oscillating circuits, wherein the secondary-side resonant oscillating circuits are star-connected or mesh-connected and are connected to a rectifier via external conductors, wherein the rectifier includes a series connection of a plurality of diodes with identical conducting directions, wherein a smoothing capacitor is connected in parallel with the series connection and an output voltage of the rectifier is applied to connecting points of the smoothing capacitor wherein each external conductor is connected to an anode of the diodes.

An electronic transformer includes a first forward rectifier, a second forward rectifier, a third forward rectifier and a backward rectifier. The first forward rectifier is coupled between a first-phase power and a first output terminal. The second forward rectifier is coupled between a second-phase power and the first output terminal. The third forward rectifier is coupled between a third-phase power and the first output terminal. The backward rectifier is coupled between a neutral line and a second output terminal. The first forward rectifier, the second forward rectifier, and the third forward rectifier are configured to half-wave rectify the first-phase power, the second-phase power, and the third-phase power to generate rectified first-phase to third-phase power sources, and superimpose the rectified first-phase to third-phase power sources on the first output end to serve as an output voltage of the electronic transformer.

Disclosed is a high step down power converter. The power converter includes a bridge circuit and a chain of transformer-rectifier (TR) blocks. Each of the TR blocks has a transformer and a rectifier circuit. The transformer has a magnetic core, primary windings that have one or more turns, and secondary windings that are wound a single turn over corresponding primary windings. The bridge circuit is driven to generate a primary winding current, which flows to the primary windings of the transformers of the TR blocks. Currents induced in the secondary windings are rectified by the rectifier circuits to generate an output current that is provided to a load that is connected to the power converter.

Disclosed are transformers for power converters. A power converter includes a bridge circuit and a chain of transformer-rectifier (TR) blocks. Each of the TR blocks has a transformer and a rectifier circuit. The transformer has a magnetic core, primary windings that have one or more turns, and secondary windings that are wound a single turn over corresponding primary windings. Leakage flux of the transformer is through a magnetic core that is disposed on top of the windings. The bridge circuit is driven to generate a primary winding current, which flows to the primary windings of the transformers of the TR blocks. Currents induced in the secondary windings are rectified by the rectifier circuits to generate an output current that is provided to a load of the power converter.

Disclosed are transformer-rectifier blocks for power converters. A transformer-rectifier block has a transformer and a rectifier circuit that are vertically integrated with a substrate. The transformer has a magnetic core, primary windings that have one or more turns, and secondary windings that are wound a single turn over corresponding primary windings. The transformer is mounted on one side of the substrate, and the rectifier circuit is mounted on an opposing side of the substrate.