Abstract:
A printed circuit board (PCB) coil linear actuator is disclosed. The actuator includes a coil assembly and a magnet assembly. The coil assembly includes a plurality of PCB coils electrically connected in series. The PCB coils arranged in a row and adjacent PCB coils are separated by a gap. Each PCB coil includes a low aspect ratio, multi-layer coil member disposed on a board member. The actuator assembly includes a plurality of magnet units arranged in a row, wherein adjacent magnet units are separated by a gap. When the actuator is assembled, the PCB coils arranged in alternating sequence with the magnet units. The PCB coil linear actuator is intended to replace traditional slotted bobbin voice coil actuators (VCAs) and is particularly useful in fast steering mirror (FSM) applications. The PCB coil linear actuator provides many advantages over a VCA of an equivalent motor constant, including improved performance, lower weight and a lower profile.
Abstract:
Eine lineare elektrische Maschine soll einfacher und kostengünstiger bei gleich bleibend guter Motorcharakteristik hergestellt werden können. Hierzu wird für die lineare elektrische Maschine, insbesondere einen Linearmotor, ein Sekundärteil mit mehreren magnetisch leitfähigen Querschwellen (13) und mindestens einer Führungsschiene (15) bereitgestellt, die auf den mehreren Querschwellen (13) befestigt ist. Dabei sind auf jeder der mehreren Querschwellen (13) ein oder mehrere magnetische Polelemente (14) angeordnet, um mit einem Primärteil des Linearmotors in magnetische Wechselwirkung zu treten. Somit dienen die typischerweise aus Stahlplatten gefertigten Querschwellen (13) gleichzeitig als Maschinenbett, auf dem die Führungsschiene (15) für das Primärteil beziehungsweise den Schlitten (19) befestigt ist. Daher wirkt sich eine Dickentoleranz der Stahlplatte beziehungsweise Querschwelle (13) nicht auf einen Luftspalt zwischen Primärteil und Sekundärteil der linearen elektrischen Maschine aus.
Abstract:
A torquer apparatus generally comprises a reaction-gyro sphere consisting of a concentric assembly of a substantially spherical rotor and a substantially spherical stator. This is implemented in the present invention as a rotor with magnetic poles such that, when radially projected on a concentric octahedron, the same symmetrical pattern is obtained on all faces of said octahedron, the polarity of the poles projected on two adjacent faces of said octahedron being opposite and a stator with at least twenty poles magnetized with coils and such that, when radially projected on a concentric icosahedron, the same symmetrical pattern is obtained on all faces of said icosahedron, said stator being-in nominal position-concentric with said rotor. Real-time measurements, or equivalent information, of the position of the rotor with respect to the stator are obtained together with exported torque from the stator, or the orientation of the rotor with respect to the stator. A controller controls the current in the coils of the stator poles based on said measurements, or said equivalent information, such that the rotor is magnetically held in said nominal position, and that the desired torque is exported.
Abstract:
The invention relates to a generator, to a magnetic flux conducting unit for a generator, and to a power generation machine comprising such a generator. In an embodiment of the invention, a generator (412) is disclosed which comprises at least one coil assembly (428) and at least one magnetic flux conducting unit (410). The magnetic flux conducting unit (410) comprises at least one magnet (314, 316), a pair of opposed magnetic flux conducting elements (318, 320) defining a space (326) therebetween for receiving the coil assembly (428), and at least one connecting portion (322) extending between the opposed magnetic flux conducting elements (318, 320). The at least one magnet (314, 316) is arranged relative to the opposed magnetic flux conducting elements (318, 320) such that magnetic attraction forces between the elements (318, 320) are reacted through and balanced within the connecting portion (322).
Abstract:
A hand held tool (10) comprises a handle (14), a contact member (16), and an electric motor (12). The contact member has a contact surface portion 17 that lies in the first plane. The motor (12) has a stator (23) and an armature (19) where the armature (19) is able to move with non-rotary translational motion in a second plane relative to the stator (23), the second plane being parallel to the first plane. One of the stator (23) and the armature (19) is attached to the handle (14), while the other is attached to the contact member (16). Therefore, relative motion of the stator (23) and armature (19) is translated to relative motion between the handle (14) and the contact member (16). A resilient coupling (18) is coupled between the handle 14 and the contact member (16) and applies a bias against the relative motion between the handle (14) and contact member (16).
Abstract:
A linear actuator includes permanent magnet annuli arranged about an armature core for axial movement in a tubular stator upon energisation of coils arranged in concentric association with the armature. The stator has portions extending radially inwards of the coils and towards one another beneath each coil, which define a spacing between the coil and the armature. The annuli have a substantially radially magnetised structure and the coils are configured for single phase power input. In one embodiment (Figure 6), two pairs of spaced annuli are arranged on the core, wherein the axial length of the outermost annuli is half the axial length of the inner annuli.
Abstract:
A ironless magnetic motor (21-23) employs a magnetic track (30) and a forcer (40). The forcer (40) is orientated a magnetic field (β) across a linear air gap of the magnetic track (30) to generate a drive force (F x ) parallel to the X drive axis and orthogonal to the Z levitation axis in response to a commutation drive current (I x ) and to generate a force (F z , F y ) orthogonal to the X drive axis in response to a commutation coil current (I z , I y ) being superimposed on and phase shifted from the commutation drive current (I x ). To this end, a set of levitating turns of the coil (41) parallel to the X drive axis and orthogonal to the Z levitation axis may be internal or external to magnetic field (β), and the forcer (40) may be centered or offset from a center X-Z longitudinal axis (CP) of the linear air gap.
Abstract translation:无铁磁电机(21-23)采用磁轨(30)和锻炼机(40)。 锻炼器(40)沿着磁道(30)的线性气隙定向磁场(ß),以产生平行于X驱动轴线的驱动力(F x x x),并与 所述Z悬浮轴响应于换向驱动电流(I )并且产生与所述Z轴正交的力(F 1,Z 2,F Y y) 响应于换向线圈电流(I SUB,I SUB)的X驱动轴被叠加在换向驱动电流上并从换向驱动电流(I / SUB>)。 为此,平行于X驱动轴线并与Z悬浮轴线正交的线圈(41)的一组悬浮匝可以在磁场(ß)内部或外部,并且,锻炼器(40)可以居中或 偏离线性气隙的中心XZ纵向轴线(CP)。
Abstract:
A linear motor (300) is provided including a stator (320) having at least one electromagnetic coil (322a) and a rotor (302) having at least one permanent magnet (308a). The rotor is movable toward at least a first position when at least one electromagnetic coil is energized and solely magnetically biased to a neutral position when the at least one electromagnetic coil is deenergized.
Abstract:
Um einen Kraftwelligkeitsausgleich bei einem Linearmotor zu schaffen, wird dieser mit einem KWA-Zahn (2) mit einer vorgebbaren Breite b KWA versehen, der durch einen zusätzlichen Luftspalt δ KWA vom normalen Luftspalt δ L beabstandet ist und zu den benachbarten Zähnen (17,18) des Blechpakets (1) einen Abstand τ KWA aufweist.
Abstract translation:为了以线性马达提供Kraftwelligkeitsausgleich,它是 KWA SUB>设置有KWA齿(2)具有预定的宽度b,通过从正常的附加空气间隙d KWA SUB> 空气间隙d → SUB>并且从层叠铁心(1)的相邻的齿(17,18)间隔开的具有一距离t KWA SUB>具有。