A common mode inductor (10) for suppression of common mode noise and transmission of a differential signal is disclosed. The inductor comprises a core (15) with a first and second winding (11, 12), wherein the first winding and the second winding forms a pair of conductors arranged to convey a differential communication signal. Further, a third and fourth winding (13, 14) is arranged to extend along at least a portion of the first and second winding, respectively. The third winding and the fourth winding may be locally inductively coupled to the first winding and the second winding, respectively. Moreover, the third winding and the fourth winding are connected in series with each other so that differential signal on the first and second windings transformed to the third and fourth winding maybe added to each other. The third and fourth winding may hence provide a sensor signal induced by the differential communication signal in the first winding and the second winding. A system (100) comprising the common mode inductor and a method for measuring a differential signal in said inductor is also disclosed.

A direct current controller includes a rectifier configured to convert alternating current input into a direct current output. A converter electrically coupled to the rectifier generates a converted direct current voltage that regulates a converted direct current from the direct current output of the rectifier and synthesizes an ac component of an alternating current grid to counteract an induced back-emf. A direct current controller central controller coupled to the converter regulates the converted direct current.

A direct current controller includes a rectifier configured to convert alternating current input into a direct current output. A converter electrically coupled to the rectifier generates a converted direct current voltage that regulates a converted direct current from the direct current output of the rectifier and synthesizes an ac component of an alternating current grid to counteract an induced back-emf. A direct current controller central controller coupled to the converter regulates the converted direct current.

A common mode inductor (10) for suppression of common mode noise and transmission of a differential signal is disclosed. The inductor comprises a core (15) with a first and second winding (11, 12), wherein the first winding and the second winding forms a pair of conductors arranged to convey a differential communication signal. Further, a third and fourth winding (13, 14) is arranged to extend along at least a portion of the first and second winding, respectively. The third winding and the fourth winding may be locally inductively coupled to the first winding and the second winding, respectively. Moreover, the third winding and the fourth winding are connected in series with each other so that differential signal on the first and second windings transformed to the third and fourth winding maybe added to each other. The third and fourth winding may hence provide a sensor signal induced by the differential communication signal in the first winding and the second winding. A system (100) comprising the common mode inductor and a method for measuring a differential signal in said inductor is also disclosed.

A totem-pole PFC and a current-sampling unit of the totem-pole PFC are provided. The totem-pole PFC is electrically connected to an AC power source and a DC-to-DC converter, and is electrically connected to a load through the DC-to-DC converter. The current-sampling unit has a first sampling switch and a second sampling switch. The first sampling switch and the second sampling switch are controlled to be turned on and turned off so that a magnetizing current flows through the magnetizing inductor when a magnetizing inductor is magnetized and a demagnetizing current does not flow through the sampling resistor when the magnetizing inductor is demagnetized, thereby increasing the demagnetization efficiency and overcoming superimposed operations to improve current detection and increase conversion efficiency of the power conversion.

A totem-pole PFC and a current-sampling unit of the totem-pole PFC are provided. The totem-pole PFC is electrically connected to an AC power source and a DC-to-DC converter, and is electrically connected to a load through the DC-to-DC converter. The current-sampling unit has a first sampling switch and a second sampling switch. The first sampling switch and the second sampling switch are controlled to be turned on and turned off so that a magnetizing current flows through the magnetizing inductor when a magnetizing inductor is magnetized and a demagnetizing current does not flow through the sampling resistor when the magnetizing inductor is demagnetized, thereby increasing the demagnetization efficiency and overcoming superimposed operations to improve current detection and increase conversion efficiency of the power conversion.

An ultra-thin voltage regulator module with high current density and an inductor assembly are described. The ultra-thin voltage regulator module comprising at least one inductor assembly, at least one top assembly and a power electrical connection assembly, wherein the inductor assembly is a 2N-phase ultra-thin inductor; the inductor assembly comprises a magnetic core and an inductor winding; the shape of the inductor winding is specifically I-shaped; the power electrical connection assembly comprises a first power electrical connector and a second power electrical connector; the top assembly comprises a top plate and an IPM unit, and the SW end of the IPM unit is perpendicular to the position of the inductor winding.

An ultra-thin voltage regulator module with high current density and an inductor assembly are described. The ultra-thin voltage regulator module comprising at least one inductor assembly, at least one top assembly and a power electrical connection assembly, wherein the inductor assembly is a 2N-phase ultra-thin inductor; the inductor assembly comprises a magnetic core and an inductor winding; the shape of the inductor winding is specifically I-shaped; the power electrical connection assembly comprises a first power electrical connector and a second power electrical connector; the top assembly comprises a top plate and an IPM unit, and the SW end of the IPM unit is perpendicular to the position of the inductor winding.

A circuit arrangement for reducing a magnetic unidirectional flux component in a core of a transformer includes a measuring device that provides a sensor signal corresponding to the magnetic unidirectional flux component, a compensation coil magnetically coupled to the core of the transformer, and a semiconductor switching device which is electrically arranged in a current path in series with the compensation coil to feed a current into the compensation coil, such that current is directed opposite the unidirectional flux component, where the semiconductor switching device is controlled via a control signal provided by a controller, and includes an inductive voltage divider having a first impedance component arranged in a current circuit in series with the compensation coil and the semiconductor switching device and a second impedance component arranged in parallel with the semiconductor switching device, where the first impedance component is connected in parallel with a parallel resonant circuit.

Single phase inductors have non-linear inductance values, and M-phase coupled inductors having non-linear leakage inductance values. Each inductor includes, for example, at least one of the following: a saturable magnetic element, a gap of non-uniform thickness, a core formed of a distributed gap material, or a non-homogeneous core. A DC-to-DC converter includes an inductor having a non-linear inductance value, a switching subsystem, and an output filer. Another DC-to-DC converter includes an output filter, a coupled inductor having non-linear leakage inductance values, and switching subsystems.