A transformer includes a core with a surface, a primary winding with two or more primary winding turns wrapped about the core, and a secondary winding with one and only one secondary winding turn extending about the core. The one and only one secondary winding turn is interleaved among the two or more primary winding turns on the surface of the core to limit magnetic flux leakage along the primary winding and the secondary winding. Power converters and power conversion methods are also described.

A transformer includes a core with a surface, a primary winding with two or more primary winding turns wrapped about the core, and a secondary winding with one and only one secondary winding turn extending about the core. The one and only one secondary winding turn is interleaved among the two or more primary winding turns on the surface of the core to limit magnetic flux leakage along the primary winding and the secondary winding. Power converters and power conversion methods are also described.

The present disclosure relates to ensuring contact between core halves of a current transformer. For example, a current transformer (CT) may include a split core comprising a first core half having a first plurality of faces and a second core half having a second plurality of faces. Each face of the first core half may contact a corresponding face of the second core half to allow magnetic flux to flow through the split core to induce current on windings of the CT. The CT may include a first housing that houses the first core half and a second housing that the second core half. The CT may include a biasing element that biases the second core half towards the first core half to ensure that each face of the second core half contacts the corresponding face of the first core half.

The present disclosure relates to ensuring contact between core halves of a current transformer. For example, a current transformer (CT) may include a split core comprising a first core half having a first plurality of faces and a second core half having a second plurality of faces. Each face of the first core half may contact a corresponding face of the second core half to allow magnetic flux to flow through the split core to induce current on windings of the CT. The CT may include a first housing that houses the first core half and a second housing that the second core half. The CT may include a biasing element that biases the second core half towards the first core half to ensure that each face of the second core half contacts the corresponding face of the first core half.

An alternating hybrid excitation assembly and its application to a rotary motor, linear motor and transformer, including: an even number of iron cores and a plurality of magnetic isolation layers arranged between, forming a loop, each core includes one or two notches wherein permanent magnets are inlaid, the two magnetic pole faces are attached to two opposite sides of the notch of the corresponding core, and a gap is reserved between one side face of each magnet and the side edge of the notch of the core; the magnets have opposite magnetic polarity directions, and an excitation coil surrounds the cores. A permanent magnetic potential and an excitation magnetic potential are superimposed to form an alternating hybrid excitation magnetic field, and thus electromagnetic energy efficiency is improved. Further, embodiments of the alternating hybrid excitation assembly applied to the rotary motor, the linear motor and the transformer.

An alternating hybrid excitation assembly and its application to a rotary motor, linear motor and transformer, including: an even number of iron cores and a plurality of magnetic isolation layers arranged between, forming a loop, each core includes one or two notches wherein permanent magnets are inlaid, the two magnetic pole faces are attached to two opposite sides of the notch of the corresponding core, and a gap is reserved between one side face of each magnet and the side edge of the notch of the core; the magnets have opposite magnetic polarity directions, and an excitation coil surrounds the cores. A permanent magnetic potential and an excitation magnetic potential are superimposed to form an alternating hybrid excitation magnetic field, and thus electromagnetic energy efficiency is improved. Further, embodiments of the alternating hybrid excitation assembly applied to the rotary motor, the linear motor and the transformer.

For predictive synchronous rectifier sensing and control, an example apparatus includes an air core toroid having a voltage output, the air core toroid adapted to surround a portion of a current path and adapted to be coupled through the current path to a transformer, and a control logic circuit having a voltage input and a control output, the voltage input coupled to the voltage output, and the control output adapted to be coupled to a switch.

For predictive synchronous rectifier sensing and control, an example apparatus includes an air core toroid having a voltage output, the air core toroid adapted to surround a portion of a current path and adapted to be coupled through the current path to a transformer, and a control logic circuit having a voltage input and a control output, the voltage input coupled to the voltage output, and the control output adapted to be coupled to a switch.

A toroidal transformer assembly of an electronic component module assembly includes a transformer mounting plate receptive of the toroidal transformer. The transformer mounting plate includes a base, a center boss extending from the base, and an outer ring extending from the base, and spaced apart from the center boss. The center boss and the outer ring define a mounting location for a toroidal transformer therebetween. A plurality of fins are positioned to conduct thermal energy from the toroidal transformer to the base.

The present invention is aimed to provide a quadrupole mass spectrometer that is less thermally affected by a transformer, the quadrupole mass spectrometer including: an ionizer unit that ionizes a sample; a quadrupole unit that has two pairs of opposing electrodes that selectively pass ions generated in the ionizer unit; a voltage applying unit that applies a voltage obtained by superimposing a high-frequency voltage V cos t over a DC voltage U and to each pair of the two pairs of opposing electrodes; and an ion detecting unit that detects ions having passed through the quadrupole unit, wherein the voltage applying unit includes the transformer that transforms the high-frequency voltage V cos t, and the transformer includes a toroidal core, and a primary winding and a secondary winding that are wound around the toroidal core, and the primary winding is formed of a metal conductor having a plate-like shaped.