12results about "Magnetic circuit shape/form/construction" patented technology

This invention discloses an R-T-B sintered magnet with reduced eddy current losses, its preparation method, and its application. The magnet has partition grooves on one or two orientation surfaces, where each orientation surface is perpendicular to the orientation direction of the magnet. The partition grooves extend through the magnet in a first extension direction but not in a second extension direction. The first extension direction of the partition grooves is perpendicular to the orientation direction of the magnet, and the second extension direction is parallel to the orientation direction of the magnet. By creating crisscrossing partition grooves on the magnet and filling them with an insulating layer, this invention increases the resistivity of a thin layer on the magnet's surface by a certain thickness, significantly reducing motor power loss due to eddy current effects. The insulating layer filling the grooves increases the resistivity of both the magnet surface and the grooves, effectively preventing conduction due to poor processing or current breakdown when the groove width is narrow. It also compensates for the reduction in mechanical strength caused by the grooving, ultimately resulting in a low-eddy-current, high-strength sintered magnet.

This invention discloses a multi-stage adjustable speed power shunt motor system and its control method, relating to the field of motor technology. The system includes at least two stages of motor units arranged sequentially along the axial or radial direction; the rotor of the first-stage motor unit serves as the total power output end; the rotor of the second-stage motor unit is driven by the stator of the previous-stage motor unit, driving the stator to rotate; except for the last stage, all other stators are rotatable structures. By controlling the rotation direction and speed of the rotors of the second-stage and subsequent motor units, the relative speed between the stator and rotor of the previous-stage motor unit is adjusted, achieving electromagnetic coupling and power shunt, thus changing the system's total output torque, speed, and back electromotive force. This invention has a compact structure, achieves optimized efficiency under all operating conditions, balances low-speed high torque and high-speed constant power operation, and optimizes both drive and power generation performance, making it suitable for electric vehicles, wind power generation, industrial transmission, and other fields.

This utility model discloses an injection-molded magnet assembly for an electric motor, belonging to the technical field of magnet assembly. It includes an injection-molded outer shell and a magnetic housing, with a positioning hole inside the bottom wall of the injection-molded outer shell. The beneficial effects of this utility model are that it features a detachable magnetic housing and magnets. The positioning hole inside the bottom wall of the injection-molded outer shell provides alignment support for the magnetic housing. The magnetic housing is composed of multiple circular magnets arranged in a ring array, with a positioning post fixed at the bottom, inserted into the positioning hole of the injection-molded outer shell for positioning and fixation. The magnets are fixedly installed inside the magnetic housing, providing a magnetic field. The two outer walls of the magnetic housing are in contact with each other, enhancing the stability and strength of the overall structure. The injection-molded outer shell is installed on the outside of the magnetic housing through an injection molding process, forming a tight whole. A limit frame is provided on one side wall of the magnetic housing, with hexagonal bolts installed inside, which can further fix the injection-molded outer shell, ensuring the stability of the assembly.

toroidal coil arrangement (10), comprising - a toroidal outer coil (12) with a plurality of electrically interconnected outer windings enclosing an outer coil interior, and - a toroidal inner coil (14) arranged concentrically to the outer coil (12) within the interior of the outer coil, with a plurality of electrically interconnected inner windings, wherein each of the coils (12, 14) has a pair of terminals (121; 141) for its separate electrical contacting, characterized by that the outer coil (12) has two open ring rails (122a,b) running at a constant distance from each other, defining an annular gap (124) between them, which are connected to each other by conductor arcs (123) distributed evenly over their circumference, forming the outer windings.

The present patent application relates to an electric motor (1) comprising a modular structure (2) that incorporates four rotor sections: a primary section (3), a secondary section (4), a tertiary section (5), and a quaternary section (6). These sections are arranged in two magnetostatic cells, namely a primary magnetostatic cell (7) and a secondary magnetostatic cell (8), mounted axially and rotated relative to one another by 11.25º. The motor (1) is designed to operate with direct current (DC) at an operating voltage of between 12 V and 25 V, withstanding peaks of up to 50 V for 60 seconds. Its operation is based on repetitive cycles of magnetic attraction and repulsion controlled by an electronic board (P). Aluminium housings (21, 22), in addition to having a structural function, act as heat sinks to reduce heating during operation. The rotor sections (3, 4, 5, 6) are interconnected by a central shaft (EC), which is provided with bearings (10, 19), spacers (11, 13), and a shaft seal (20), ensuring stable rotation and protection against external contaminants. Magnetic commutation is precisely controlled by reflective optical sensors (SO) mounted on the electronic board (P), switching being performed by MOSFET transistors (43) and supervised by a microcontroller (44), responsible for monitoring the temperature of the system by means of digital thermal sensors (47). The motor provides high torque of 5.8 Nm at 25 V and 11.6 Nm at 50 V, exhibiting high energy efficiency and operational reliability, and is suitable for applications in devices that require high performance with low electricity consumption.

A rotary transformer (14, 14a) is described, particularly for an electrical machine (1), comprising a primary part (15, 15a) with a primary core (17) and a primary winding (18), and a secondary part (16, 16a) with a secondary core (19, 19a..19d) and a secondary winding (20). The secondary part (16, 16a) is rotatably arranged relative to the primary part (15, 15a) about a transformer axis (B). The primary core (17) and / or the secondary core (19, 19a..19d) each have several core segments (21a..21d) arranged about the transformer axis (B), each segment being made of a magnetically permeable material. Furthermore, an electric machine (1) with such a rotary transformer (14, 14a), a vehicle (33) with such an electric machine (1) and methods for manufacturing such a rotary transformer (14, 14a) and for manufacturing such an electric machine (1) are specified.

An electric stabiliser (1) for stabilising a floating structure is described. The electric stabiliser (1) includes a track (2) for guiding a mover (6) as a moving stabiliser mass. A direct current (DC) linear motor (8) includes a planar stator (10) that extends along the track (2) and the mover (6) that is adapted to move forwards and backwards along the track (2) as the stabiliser mass. The planar stator (10) includes a polyphase stator winding (16) with a plurality of winding coils (14) connected to define a plurality of phase windings. The mover (6) includes a plurality of permanent motor magnets (40) facing the polyphase stator winding (16) that define a plurality of mover poles of alternating polarity (i.e., north and south polarity) along the track direction. Two active magnetic bearings (44, 48) is positioned between the track and a main body (32) of the mover (6) for selectively levitating the mover. In use, the active magnetic bearings (44, 48) levitate the mover (6) above the track and the DC linear motor (8) is controlled to move the mover (6) backwards and forwards along the track (2) to dampen a rolling or pitching movement of the floating structure, for example.

This utility model provides a diesel pump with built-in rollers, comprising an armature assembly, a brush holder assembly mounted at one end of the armature assembly, a magnetic tile assembly mounted on the outer surface of the armature assembly, a housing, end covers, and a rear cover. The housing is fitted onto the armature assembly, and the end covers and rear cover are mounted at both ends of the housing, with the end covers also connected to the brush holder. The key feature is that a roller pump body is connected to the lower end of the armature assembly. By replacing the impeller with a roller pump body, the performance of the oil pump is improved, and the difficulty of pumping oil at low temperatures is solved.

An example locking assembly includes a first wall; an arm having a first end and a second end, the first end coupled to a pivot extending from the first wall, the second end having a magnet; and a component attached to a second wall, the arm movable about the pivot to align the magnet with the component to lock the first wall and a propeller rotor in a stationary position based on a magnetic attraction between the magnet and the component.

The electromagnetic pump core comprises an axial core, a plurality of radial cores and a plurality of coils, the coils are located between the radial cores, and the coils comprise a plurality of coaxially nested sub-coils, a plurality of fixing rods are arranged between adjacent sub-coils, and the fixing rods are fixed to the radial cores. The electromagnetic pump core of the application replaces ceramic tiles with ceramic rods, thereby reducing the processing difficulty and cost. The ceramic rods are fixed to the radial cores, thereby indirectly fixing the sub-coils to the radial cores. The ceramic rods can fix the positions of the sub-coils, isolate adjacent sub-coils, expand the ventilation gap between the sub-coils, and prevent the electromagnetic pump core from being damaged during transportation and use, thereby greatly improving the reliability of the pump core.