Power control apparatus for modulating electrical power signals and methods for modulating electrical power signals are discussed. In one example, a power control apparatus comprises a magnetic core comprising a first limb and a second limb. A primary winding is arranged around the first limb, and a secondary winding is arranged around the second limb. The power control apparatus comprises a voltage source converter having an AC connection and a DC connection, and a controller. The controller is configured to receive data associated with parameters of a first signal in the primary winding, compare the parameters of the first signal to parameters of a reference signal for the secondary winding, determine a harmonisation signal which, when applied to the first limb, causes a second signal in the secondary winding to approximate the reference signal. The controller is configured to cause application of the harmonisation signal to the first limb using the voltage source converter.

A transformer (900) comprising a primary-side auxiliary winding (976, wherein in use the primary-side auxiliary winding (976) is configured such that a first electric potential distribution is induced in the primary-side auxiliary winding (976); and a secondary-side auxiliary winding (982) configured such that a second electric potential distribution is induced in the secondary-side auxiliary winding (982). The primary-side auxiliary winding (976) is physically located between (a) a main pair of windings; and (b) the second-side auxiliary winding (982). A first portion of the secondary-side auxiliary winding (982) is positioned adjacent to a shield-portion of the primary-side auxiliary winding (976) such that the first electric potential distribution matches the second electric potential distribution: (1) along the respective lengths of the first portion of the secondary-side auxiliary winding (982) and the shield-portion of the primary-side auxiliary winding (975); and (2) over a frequency range that is greater than a particular threshold frequency.

A transformer apparatus for an electrical power transformation system is provided. The transformer apparatus comprises three outer transformer limbs, an inner transformer limb a transfer star, and first and second connection portions. The transfer star comprises an electromagnetic transfer core and three transfer coils. The electromagnetic transfer core extends from the inner transformer limb to each of the three outer transformer limbs at a point on each outer transformer limb between the first coil assembly and the second coil assembly. The transfer coils are wound around the electromagnetic transfer core such that each transfer coil is arranged between the inner transformer limb and a respective outer transformer limb. The transfer star is configured to allow transfer of magnetomotive force between the outer transformer limbs and the inner transformer limb of the transformer apparatus. First and second connecting portions are to allow magnetic flux to flow between the inner and outer transformer limbs.

A wound core equipped with a laminated body including plural electrical steel sheets stacked in a ring shape in side view. The laminated body includes plural bent portions, and plural block-shaped portions at positions between adjacent bent portions. At least one bent portion among the plural bent portions is a high stacking factor bent portion, wherein a stacking factor of the electrical steel sheets at the high stacking bent portion is higher than an average stacking factor of the steel sheets at the plural block-shaped portions.

A system for determining an operational state of an atmospheric pressure plasma. The system has a transformer for coupling power into the atmospheric pressure plasma, a current sampling circuit configured to sample at least one current pulse flowing through a primary winding of the transformer, and a programmed microprocessor configured to determine, from a waveform of the current pulse, the operational state of the atmospheric pressure plasma. The operational state is one of: a no plasma state, a plasma origination state indicative of an ignited arc expanding into a plasma by gas flow thereinto, and a plasma maintenance state indicative of the plasma being expanded.

An active power transformer for controlling non-uniform voltage, of the present invention, comprises a plurality of zigzag wiring parts that are symmetrically-structured and are connected to a power source system having three-phase wiring for supplying an alternating current power source to a load, wherein the plurality of zigzag wiring parts has a core having three legs, four windings of a three-phase transformer are wound around each leg in the same direction so as to be symmetrical to each other, a second lead wire of a winding of a neighboring phase is connected to a first lead wire of a winding for the transformer, which is wound around a leg of each phase, through a lead connection wire so as to form a terminal of each phase, and the lead wires of the remaining windings are connected to a neutral point, and the respective lead connection wires do not intersect with each other, and thus a safer active power transformer for controlling non-uniform voltage is possible.

The present application provides a synchronous rectification assembly, a manufacturing method thereof and a power supply. The synchronous rectification assembly comprises a synchronous rectification board, a transformer and a main board; wherein the synchronous rectification board is disposed on the main board and is electrically connected to the main board, and the transformer is disposed on the synchronous rectification board and is electrically connected to the synchronous rectification board; the synchronous rectification board is provided with a conductive contact for being electrically connected to an external apparatus, and the synchronous rectification board is used for synchronously rectifying an output signal of the transformer and thereafter transmitting the output signal to the conductive contact. The present application can solve the problem that the output signal outputted by the transformer in the existing synchronous rectification assembly has a large loss during transmission.

Power control apparatus and methods for modulating electrical power signals are discussed. In one example, a power control apparatus comprises a magnetic core comprising a first limb and a second limb. A primary winding is arranged around the first limb, and a secondary winding is arranged around the second limb. The power control apparatus comprises a voltage source converter having an AC connection and a DC connection, and a controller. The controller is configured to receive data associated with parameters of a first signal in the primary winding, compare the parameters of the first signal to parameters of a reference signal for the secondary winding, determine a harmonisation signal which, when applied to the first limb, causes a second signal in the secondary winding to approximate the reference signal. The controller is configured to cause application of the harmonisation signal to the first limb using the voltage source converter.

Power control apparatus for modulating electrical power signals and methods for modulating electrical power signals are disclosed. In one example, a power control apparatus comprises a magnetic core comprising a first limb and a second limb, with a primary winding around the first limb, and a secondary winding around the second limb. The power control apparatus comprises a voltage source converter having an AC connection, a DC connection, and a controller. The controller is configured to receive data associated with parameters of a first signal in the primary winding, compare the parameters of the first signal to parameters of a reference signal for the secondary winding, determine a harmonization signal which, when applied to the first limb, causes a second signal in the secondary winding to approximate the reference signal. The controller is configured to cause application of the harmonization signal to the first limb using the voltage source converter.