A method of controlling highly regulated power and frequency from a high frequency power supply system to provide a highly regulated power and frequency to a workpiece load where the highly regulated power and frequency can be independent of the workpiece load characteristics by inverter switching control and an inverter output impedance adjusting and frequency control network that can include precision variable reactor pairs with a geometrically-shaped moveable insert core section and a stationary split-bus section with a complementary geometrically-shaped split bus section and a split electric terminal bus section where the insert core section can be moved relative to the stationary split-bus section to vary the inductance of the variable reactors.

An inductive component is provided, including: a winding; and a plurality of adjustment bodies configured to adjust an inductance of the inductive component, the adjustment bodies including a ferromagnetic material and surrounding at least some regions of the winding, the inductance being adjusted via a shape and/or a position and/or a number of the adjustment bodies, and a filling body including a non-magnetic material is disposed between at least two of the adjustment bodies.

An inductive component is provided, including: a winding; and a plurality of adjustment bodies configured to adjust an inductance of the inductive component, the adjustment bodies including a ferromagnetic material and surrounding at least some regions of the winding, the inductance being adjusted via a shape and/or a position and/or a number of the adjustment bodies, and a filling body including a non-magnetic material is disposed between at least two of the adjustment bodies.

The current transformer includes a magnetic circuit made of magnetic material that is intended to be placed around a primary conductor, and a secondary winding that is wound onto a portion of the magnetic circuit in order to deliver a secondary current to processing circuits. In this current transformer the magnetic circuit includes at least one device for varying the magnetization of a portion of the magnetic circuit according to the temperature in order to limit or to decrease the magnetic flux in the magnetic circuit when the temperature of the magnetic circuit increases. The protection device and the electrical circuit breaker include such a transformer.

A coil arrangement for an inductive power transfer system comprising a core (32, 33) having a region of decreased permeability (34), a coil (45) associated with the core, and a tuning slug (35) which is moveable along an axis adjacent the region of decreased permeability in order to adjust the inductance of the coil arrangement, the tuning slug (35) having an effective permeability which varies along said axis.

A coil arrangement for an inductive power transfer system comprising a core (32, 33) having a region of decreased permeability (34), a coil (45) associated with the core, and a tuning slug (35) which is moveable along an axis adjacent the region of decreased permeability in order to adjust the inductance of the coil arrangement, the tuning slug (35) having an effective permeability which varies along said axis.

A method of controlling highly regulated power and frequency from a high frequency power supply system to provide a highly regulated power and frequency to a workpiece load where the highly regulated power and frequency can be independent of the workpiece load characteristics by inverter switching control and an inverter output impedance adjusting and frequency control network that can include precision variable reactor pairs with a geometrically-shaped moveable insert core section and a stationary split-bus section with a complementary geometrically-shaped split bus section and a split electric terminal bus section where the insert core section can be moved relative to the stationary split-bus section to vary the inductance of the variable reactors.

A method of controlling highly regulated power and frequency from a high frequency power supply system to provide a highly regulated power and frequency to a workpiece load where the highly regulated power and frequency can be independent of the workpiece load characteristics by inverter switching control and an inverter output impedance adjusting and frequency control network that can include precision variable reactor pairs with a geometrically-shaped moveable insert core section and a stationary split-bus section with a complementary geometrically-shaped split bus section and a split electric terminal bus section where the insert core section can be moved relative to the stationary split-bus section to vary the inductance of the variable reactors.

There is described a device for controlling an amount of current within a power distribution network by manipulating the amount of magnetic flux in the device and thus the impedance experienced by the power distribution network across the device. This is achieved by winding a plurality of coils about a magnetically permeable core and by providing the device with a magnetically permeable bridge element that is movable between a fully-open position at which the net magnetic flux generated in the core by alternating currents in each coil is zero, and a fully-closed position at which a net magnetic flux is present in the core.

A displacement transducer for a valve in a housing includes a cylindrical displacement transducer core, a coil, a coil housing, and a compensation element. The coil is positioned in the coil housing, and radially encloses the core. The coil housing has a first side supported by the housing, and a supporting face positioned between the first side and an axial end side of the coil housing facing away from the valve such that a length change of the coil is not limited in an axial direction facing away from the valve. The housing is axially supported on the compensation element via the supporting face. A side of the compensation element facing away from the valve is supported on one or more of (i) an adjustable cover, (ii) a standard component of a supporting chain of the core, and (iii) a component formed from a material with a suitable coefficient of thermal expansion.