Abstract: The present invention relates to an inductor coil, comprising: a first component (12); a second component (14); and a length of conductor (18); wherein, the first component is located adjacent to the second component; wherein, a core (16) is formed from the first component and the second component; wherein the core is located along a first portion of a central axis and a second portion of the central axis; wherein, along a third portion of the central axis the first component is spaced from the second component to form a gap (20, 30) in the core, wherein the third portion of the central axis is between the first portion of the central axis and the second portion of the central axis; wherein, a first part of the length of conductor is located around the first portion of the central axis, located around the second portion of the central axis, and located around the third portion of the central axis to form a plurality of turns of conductor around the core and the gap in the core; and wherein, at least one secti

Abstract: The present disclosure relates to an energy management system for a motor controller system for optimising power signals for different operating voltages of electrically commutated motors. The energy management system comprises a bi-directional energy converter comprising a first input/output terminal and a second input/output terminal, a first waveform controller, and a second waveform controller. The bi-directional energy converter is coupled to the first waveform controller and to the second waveform controller. The first waveform controller is coupled to the second input/output terminal and the second waveform controller is coupled to the first input/output terminal. The bi-directional energy converter is configured to receive a first input voltage at the first input/output terminal and generate a first output voltage in a first operating direction and receive a second input voltage at the second input/output terminal and generate a second output voltage in a second operating direction.

Abstract: The present invention relates to an inductor coil, comprising: a first component (12); a second component (14); a length of conductor (18); a heat sink (100); wherein, the first component is located adjacent to the second component; wherein, a core (16) is formed from the first component and the second component; wherein, a first part of the length of conductor is wound around at least the core to form a plurality of turns of conductor; wherein, the heat sink comprises a thermally conductive material; wherein, the heat sink comprises a first part (90, 110) and a second part; wherein, first part of the heat sink has a first material and/or structural characteristic and the second part of the heat sink has a second material and/or structural characteristic different to the first material and/or structural characteristic; and wherein, an inner surface of the first part of the heat sink is in contact with an outer surface of a part of the plurality of turns of conductor.

Abstract: The present disclosure is directed to slotless electric motor, in particular, to a method of manufacturing a stator for a slotless electric motor. An aspect of the disclosure provides a method of manufacturing a stator for a slotless electric motor, the method comprising: disposing a conductor in the shape of an annular cylinder; bonding a plurality of bonded lengths of the conductor, wherein the plurality of bonded lengths are separated by non-bonded lengths; folding the conductor to provide a plurality of petals repeated along the conductor, wherein each petal comprises a pair of bonded lengths connected by a non-bonded length; rotating each petal about a point on the second circle to align in parallel the bonded lengths of all of the petals to thereby provide a stator comprising a cylindrically-shaped conductor wherein the bonded lengths are equidistantly disposed around and from a central longitudinal axis of the cylindrically-shaped conductor.

Abstract: The present invention relates to a slotless motor comprising a rotor position sensing element. The motor has a rotor having a rotational axis and a plurality of coil windings arranged into an integer N number of distinct blocks, each block being arranged about the rotational axis and having a gap between each adjacent pair of blocks. The rotor position element has a sensor ring having a sensor fixed to the sensor ring and a sensor ring attachment extending from the sensor ring wherein the sensors are spaced around the rotational axis and wherein the rotor position sensing element is configured to hold the sensor ring relative to at least one of the blocks such that the sensor is held in a predetermined position.

Abstract: Disclosed herein is a heatsink for removing heat from a heat source. The heatsink comprises a surface for placing adjacent to the heat source comprising a plurality of cavities formed into the surface, the plurality of cavities open on a side of the surface away from the side of the surface for placing adjacent to the heat source, and a plurality of projections, each projection extending from the surface adjacent to a corresponding cavity. Each cavity comprises a throat region configured to restrict the flow of air between each respective cavity and the region between a corresponding pair of projections extending from the surface adjacent to the cavity.

Abstract: The present invention relates to a slotless motor including a thin-walled hollow rotor body 100, and methods of manufacture of such rotors, the methods including hot forming and machining steps. The rotor body has a rotational axis 102 and comprises a first cylindrical portion 104 having a first diameter, a second cylindrical portion 106 having a second diameter, larger than the first diameter and a third cylindrical portion 108 having a third diameter, smaller than the second diameter, the third cylindrical portion located at a second end of the rotor body 100. A first end cap 110 joins the first and second cylindrical portions together, and a second end cap 112 joins the first and second cylindrical portions together. The first, second and third cylindrical portions are all arranged coaxially with the rotational axis 102 of the rotor 100 such that the second cylindrical portion 108 and the first and second end caps collectively define a hollow cavity 114 in the rotor body 100.

Abstract: The present invention relates to the inductors, for example, flat ribbon inductors and methods of forming thereof.

Abstract: A rotor for an electric machine is disclosed herein. The rotor comprises: a central shaft; a rotor drum arranged radially outward of the central shaft, wherein the rotor drum comprises a hollow cylinder for carrying permanent magnets on an inner and/or outer surface of the hollow cylinder, and wherein the rotor drum is coaxial with both the central shaft and a rotational axis of the rotor; and a cap arranged to couple the central shaft to the rotor drum to enable the rotor drum and central shaft to rotate together about the rotational axis. An inner portion of the cap is coupled to the central shaft at a first position along the length of the rotational axis, and an outer portion of the cap is coupled to the rotor drum at a second position along the length of the rotational axis. The first position is at a different length along the rotational axis to the second position.

Abstract: A stator for interacting with magnets carried by a rotor of an electric machine, the stator comprising: an active region arranged to be aligned with the magnets carried by the rotor; a first inactive region and a second inactive region, wherein the first and second inactive regions are separated by the active region; and a slotless phase winding comprising a plurality of conductive elements, wherein each conductive element comprises a conductor provided in an insulating housing, and wherein the slotless phase winding is arranged in a serpentine structure comprising: a first active segment in which the conductive elements extend across the active region from the first inactive region to the second inactive region; a second active segment in which the conductive elements extend across the active region from the second inactive region to the first inactive region; and an inactive segment coupling the first active segment to the second active segment, wherein the inactive segment comprises a turn provided in the