2547results about "Magnetic circuit" patented technology

To provide a rotary electric machine which can improve the density of magnetic fluxes in a torque generation place while suppressing the induction voltage when the rotor is making rapid rotations.SOLUTION: The rotary electric machine includes: a stator having a plurality of stator teeth provided at predetermined intervals in a circumferential direction and projecting radially inward; and a rotor provided radially inside the stator. A plurality of grooves are formed on the outer peripheral surface of the rotor. The number of the grooves corresponds to the number of the stator teeth that generate magnetic force for attracting the rotor.SELECTED DRAWING: Figure 1

The invention relates to a double-layer permanent magnet radial field modulation type magnetic gear and a new energy automobile hub motor, the magnetic gear comprises a high-speed rotor, a magnetic regulation stator and a low-speed rotor, the high-speed rotor is composed of a high-speed rotor iron yoke and high-speed rotor permanent magnets, and the low-speed rotor is composed of a low-speed rotor inner layer permanent magnet, a low-speed rotor outer layer permanent magnet and a low-speed rotor iron yoke; the high-speed rotor iron yoke, the high-speed rotor permanent magnet, the flux-adjustable stator, the low-speed rotor inner-layer permanent magnet, the low-speed rotor outer-layer permanent magnet and the low-speed rotor iron yoke are coaxially nested in sequence from inside to outside; the high-speed rotor permanent magnet is composed of a plurality of permanent magnet modules of umbrella-shaped tooth structures, the low-speed rotor inner-layer permanent magnet is magnetized in a Halbach arrangement mode, the low-speed rotor outer-layer permanent magnet is magnetized in the radial direction, and the high-speed rotor permanent magnet is magnetized in a Halbach arrangement mode of umbrella-shaped teeth. The torque transmission capacity of the magnetic gear can be improved, the magnetic saturation phenomenon is restrained, the magnetic field modulation effect is enhanced, and the torque density of the magnetic gear is improved.

The invention provides a multi-magnetic-circuit single-magnetic-ring dual-modulation three-rotor coaxial magnetic gear and an automobile hub motor, the magnetic gear comprises an inner rotor, a T-shaped dual-modulation magnetic ring, an intermediate rotor and an outer rotor, the inner rotor, the T-shaped dual-modulation magnetic ring and the intermediate rotor are nested in sequence and are coaxially configured to form a radial and modulation coaxial magnetic gear structure; the middle rotor, the T-shaped dual-modulation magnetic modulation ring and the outer rotor are sequentially nested and coaxially arranged to form an axial and modulation coaxial magnetic gear structure; and sum modulation is adopted between the inner rotor and the intermediate rotor, sum modulation is adopted between the intermediate rotor and the outer rotor, and the two sum modulation and sum modulation share one T-shaped dual-modulation magnetic modulation ring, so that the monotonic magnetic ring dual-modulation effect is realized. The size of the magnetic gear can be reduced, the torque transmission capacity of the magnetic gear is improved, the magnetic saturation phenomenon is restrained, the magnetic field modulation effect is enhanced, and the torque density of the magnetic gear is improved.

An electric motor having a stator and a rotor in which the electric motor is an axial flux motor. The stator has a multiplicity of cores which, along a circumferential direction, are disposed beside on another on a common first diameter and are in each case surrounded by one coil. The rotor has a multiplicity of magnets which, along the circumferential direction, are disposed beside one another on a common second diameter on a support. Each magnet in the circumferential direction extends across a first angular range and the magnets are disposed so as to be mutually spaced apart by a second angular range formed by the support, which support is also heatable by the stator by induction. The second angular range is at least 30% of the first angular range.

The present disclosure provides a sealing device and an in-wheel motor including the sealing device. The in-wheel motor includes a stator, a rotor rotatably disposed with respect to the stator, an annular inner seal connected to the stator and spaced apart from the rotor by a predetermined gap so as to be disposed between the stator and the rotor, and an annular slinger coupled to an end portion of the rotor, wherein the annular inner seal seals between the slinger and the in-wheel motor.

An electric propulsion system for a vertical take-off and landing (VTOL) aircraft having a heat exchanger to cool fluids used in an electrical engine, the electric propulsion system comprising at least one electrical engine mechanically connected directly or indirectly to a fuselage of the VTOL aircraft and electrically connected to an electrical power source. The electrical engine may comprise an electrical motor having a stator and a rotor; a gearbox assembly comprising a sun gear; at least one planetary gear; a ring gear; and a planetary carrier. The electric engine may include an inverter assembly comprising a thermal plate and an inverter assembly housing; an end bell assembly that is connected to the thermal plate of the inverter assembly; and a heat exchanger comprising an array of cooling fins and tubes.

The invention provides an axial magnetic flux generator, a range extender and a power generation system, and relates to the technical field of generators, the axial magnetic flux generator provided by the invention adopts an asymmetric double-rotor structure, the radius of a first rotor disc is greater than that of a second rotor disc, and the first rotor disc and the second rotor disc are respectively matched with a first winding and a second winding with corresponding sizes and are arranged at two sides of a stator assembly. The rotating shaft drives the two rotors to rotate at the same time, multi-stage power output is achieved, and the output power of the first winding is larger than that of the second winding. Different power output channels can be matched according to different power generation working conditions, high heat efficiency intervals of the engine under different torque outputs can be effectively adapted, and therefore the power generation efficiency and the energy utilization rate of the generator are improved.

The invention discloses a variable magnetic flux memory motor, which comprises a stator, armature windings and a rotor, and is characterized in that the armature windings comprise a first winding and a second winding which are different and switchable in mode; the rotor comprises a plurality of poles distributed in the circumferential direction, each pole comprises a first layer of permanent magnets and a second layer of permanent magnets, the first layer of permanent magnets are high-coercive-force permanent magnets, the second layer of permanent magnets comprise at least two second permanent magnets, all the second permanent magnets are high-coercive-force permanent magnets or all the second permanent magnets are low-coercive-force permanent magnets, and the first layer of permanent magnets and the second layer of permanent magnets are arranged in the circumferential direction. And the characteristics of the magnetic materials of the second layer of permanent magnets of two adjacent poles are opposite, a fundamental wave main magnetic field is formed through the first winding in a magnetism increasing state so as to improve the permanent magnet torque, and the second winding is switched to excite a harmonic magnetic field in a magnetism weakening state so as to maintain torque output. According to the invention, through the collaborative design of the heteropole asymmetric permanent magnet layout and the dual-mode winding, the problems that the magnetic adjustment range of the existing variable flux memory motor is limited and the torque is suddenly reduced in a weak magnetic state are solved, and the efficient operation interval is obviously widened.

The invention discloses an axial flow type motor for an aircraft and a cooling control method. The axial flow type motor comprises a support, a rotor assembly arranged on the support and a rotor end cover covering the rotor assembly. A motor shaft is arranged at the central axis position of the rotor assembly, and the rotor end cover is connected with the motor shaft; the rotor end cover is provided with a plurality of heat dissipation blades and a plurality of ventilation holes which are arranged in a one-to-one correspondence mode, the support is of a hollow structure, and a heat dissipation channel arranged in the axial direction of the axial flow type motor is formed between the support and the rotor end cover. The support of the hollow structure is matched with the rotor end cover with the heat dissipation blades and the ventilation holes, so that a heat dissipation channel is formed in the axial-flow type motor, the heat dissipation blades are matched to rotate to drive airflow of the internal structure of the motor to flow, and therefore the heat dissipation efficiency of the axial-flow type motor is improved.

The invention discloses a rotor for a rotary electric machine. The rotor comprises a rotor core; a first-layer permanent magnet disposed in the first-layer magnet hole; and a second-layer permanent magnet disposed in the second-layer magnet hole. The magnet angle of one magnet sheet is an angle formed by a reference line extending in a direction perpendicular to the d-axis from an intersection point between the d-axis and the extending direction of the side surface in the main magnetic flux direction in the one magnet sheet when viewed in the axial direction, and the extending direction of the side surface. When the side closer to the radial inner side than the reference line when viewed in the axial direction is set as the positive side of the magnet angle, the first magnet angle of a first magnet piece on the d axis or closest to the d axis of the permanent magnets forming the first layer is smaller than the second magnet angle of a second magnet piece on the d axis or closest to the d axis of the permanent magnets forming the second layer.

The invention discloses an energy-saving new energy hybrid cooling type motor, and relates to the field of motors, the energy-saving new energy hybrid cooling type motor comprises a support frame used for installation and fixation, and also comprises a machine body fixedly installed at the upper part of the support frame; the air cooling heat dissipation assembly is fixedly mounted on the machine body; the water-cooling heat dissipation assembly is fixedly installed on one side of the supporting frame, and the water-cooling heat dissipation assembly communicates with the spiral cooling channel of the machine body; the transmission part is arranged between the air-cooling heat dissipation assembly and the water-cooling heat dissipation assembly, the water-cooling heat dissipation assembly is driven by the air-cooling heat dissipation assembly to conduct liquid transmission action, and then the water-cooling action on the machine body is achieved; when the machine body operates, the air cooling fan is driven to directly dissipate heat, the centrifugal control part automatically links the other fan to synchronously work with the water cooling assembly during high-speed operation, water cooling liquid circularly exchanges heat in the spiral cooling channel, air cooling and water cooling dual-mode efficient heat dissipation is formed, and extra energy consumption is not needed.

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of permanent magnet motors, the motor comprises a stator iron core and a rotor iron core, rotor holes are formed in the inner circumference of the stator iron core, the number of stator grooves is Q, the width of each stator groove opening in the circumferential direction is W, and the minimum radius of each rotor hole is R; an inter-pole groove is concavely arranged between every two adjacent magnetic steel grooves and on the periphery of the rotor core, n harmonic grooves distributed at intervals are further concavely arranged on the periphery of the rotor core in sequence, central angles of the n harmonic grooves are A1, A2, and An in sequence on the circle center of the rotor core, a central angle of the inter-pole groove is As, and the number of poles of the motor is 2P, and the formula is satisfied. The technical scheme provided by the invention aims to suppress harmonic waves, reduce torque pulsation and further reduce the operation noise of the motor.

A liquid cooling structure for a motor includes: a casing; an end plate provided at a cylinder end of the casing; a stator; a rotor; and a substantially cylindrical bulkhead extending along a direction of extension of an axis passing through a center of the stator from an inner surface of the end plate such that the bulkhead faces an inner peripheral surface of the casing with a gap therebetween to allow coolant to flow through the gap. The casing has a coolant inlet passing through the casing to guide externally supplied coolant to the gap, the stator includes a stator core having teeth protruding from the inner peripheral portion of the stator core, and coils wound around the respective teeth, and the bulkhead has nozzle hole portions passing therethrough to allow the coolant flowing in the gap to be ejected to an interior space defined by the bulkhead.

A rotor 2 comprises: a rotor body 3 that rotates about a rotational axis X; a plurality of main magnets 41 and a plurality of auxiliary magnets 42 which are arranged, on a peripheral surface of the rotor body 3, alternatingly in a circumferential direction centered on the rotational axis X; and magnetic bodies 43 that, for main magnets 41 and auxiliary magnets 42 which are adjacent in the circumferential direction, are disposed at at least one of a first position L1 which is between an auxiliary magnet 42 and the rotor body 3 and which is further toward a main magnet 41 than the circumferential direction center C2 of the auxiliary magnet 42 and a second position L2 which is between the main magnet 41 and the rotor body 3 and which is further toward the auxiliary magnet 42 than the circumferential direction center C1 of the main magnet 41. The plurality of main magnets 41 are each magnetized along a radial direction centered on the rotational axis X. The plurality of auxiliary magnets 42 are each magnetized in a direction differing from the radial direction. The plurality of main magnets 41 and the plurality of auxiliary magnets 42 are arranged in a Halbach array such that a magnetic field on the opposite side from the rotor body 3 is stronger than a magnetic field on the rotor body 3 side.

The utility model relates to the related technical field of motors of electric motorcycles, in particular to a motor of an electric vehicle, which comprises a motor shaft, first magnetic steel is fixedly connected to the inner side surface of an iron ring, and second magnetic steel is fixedly connected to the inner side surface of the iron ring. According to the electric vehicle motor, through the arrangement of the first magnetic steel and the second magnetic steel, when current enters the winding of the stator 11, the winding of the stator 11 can generate a rotating magnetic field according to the law of electromagnetic induction, and under the interaction of the magnetic field, generated electromagnetic force can drive the motor shaft 1 to rotate, so that electric energy is more effectively converted into mechanical energy; the double-row magnetic steel mode improves the strength of single magnetic steel, the double-magnetic-circuit mode is adopted, the two pieces of short magnetic steel are easy to machine, the manufacturing cost is low, the product cost is reduced, and the cost performance is improved.

The utility model belongs to the technical field of axial magnetic flux motors, and discloses an axial magnetic flux motor heat dissipation system, which comprises a motor shell, a rotor shaft and a magnetic steel support, the rotor shaft and the magnetic steel support are jointly provided with an internal heat dissipation structure, and the motor shell is provided with an external heat dissipation structure. The internal heat dissipation structure comprises a plurality of annularly arranged flat heat pipes, each flat heat pipe is installed on the magnetic steel support, an axial cooling flow channel penetrates through the axis of the rotor shaft, and the external heat dissipation structure comprises cooling water channels arranged on the two inner end walls of the motor shell. A first cover plate and a second cover plate are tightly installed on the two inner walls of the motor shell respectively, and a plurality of rib plates are evenly distributed on the inner circumferential wall of the motor shell. According to the utility model, an internal and external combined heat dissipation mode is adopted, rapid release of internal heat of the motor is realized, reduction of internal temperature is beneficial to protection of magnetic steel, balance of temperature distribution of the motor can be further ensured, and the performance of the motor is improved.

A linear motor includes an armature and a field magnet that are disposed to face each other and configured to be subjected to relative movement. The armature includes a plurality of windings that are arranged along a direction of the relative movement. Each of the windings is wound around a first iron core. The field magnet includes a plurality of permanent magnets that are disposed to face both sides of the armature in a direction perpendicular to the direction of the relative movement, and are arranged along the direction of the relative movement. A ratio of a dimension of the first iron core to an arrangement pitch of the windings in the direction of the relative movement is in a range from 0.1 to 0.35.

The invention discloses a unipolar motor based on magnetic pole modulation and harmonic slot collaborative optimization, which comprises a unipolar rotor punching sheet, the peripheral surface of the unipolar rotor punching sheet is provided with alternate first magnetic poles and second magnetic poles, the polarities of the first magnetic poles and the second magnetic poles are opposite, the periphery of the first magnetic poles is provided with a first arc, and the periphery of the second magnetic poles is provided with a second arc. The periphery of the first magnetic pole is provided with a first arc, the periphery of the second magnetic pole is provided with a second arc, the first arc and the second arc are concentrically arranged relative to the center of the unipolar rotor punching sheet, and the radius of the first magnetic pole is greater than that of the second magnetic pole, so that the air gap magnetic resistance is increased and the motor efficiency is ensured under the condition that the effective area of the air gap magnetic flux is not obviously changed; the amplitude of each order harmonic electromagnetic radial force caused by a rotor magnetic field is reduced, and the purpose of reducing the vibration noise of the motor is achieved. The motor has wide application prospects in the fields of new energy automobiles, aerospace, numerical control machine tools and the like, and the comfort and high-end quality of products can be effectively improved.

The invention discloses an axial magnetic flux motor based on half-cycle oil injection cooling and an oil injection cooling method thereof.The axial magnetic flux motor comprises motor shells, the two motor shells are symmetrically installed, the two stator assemblies are arranged in the two motor shells respectively, the rotor assembly is arranged between the two stator assemblies through an output shaft, and the rotor assembly is arranged between the two stator assemblies through an output shaft. The two stator assemblies are arranged on the two motor shells, the half-cycle oil injection cooling assemblies are arranged on the two motor shells and correspond to the upper half parts of the two stator assemblies, and the confluence oil outlet assemblies are arranged on the two motor shells and correspond to the bottoms of the two stator assemblies. The heat exchange efficiency is far higher than that of indirect cooling, and meanwhile, the two rows of half-cycle arc-shaped oil nozzles ensure that the cooling oil covers all winding coils, shunt cooling and auxiliary casing flow channel structures, the heat dissipation uniformity is improved, and the problem that the heat dissipation effect of the motor is poor is solved.

The invention relates to the technical field of motors, and discloses an integrated axial flux motor which comprises a body, the body comprises a shell and a rotating shaft extending out of the interior of the shell, one end, facing the rotating shaft, of the shell is provided with a liquid storage cavity used for bearing cooling liquid, and a heat dissipation component is installed on the liquid storage cavity. The heat dissipation component comprises two first moving blocks and two second moving blocks which are located in the liquid storage cavity and distributed at intervals in a cross shape, the positions of the two second moving blocks located in the liquid storage cavity are not changed, and the two first moving blocks are driven by the rotating shaft. The inner cavity channels are formed in the shell, one ends of the inner cavity channels communicate with the liquid storage cavity, and the other ends of the inner cavity channels communicate with one another. When the robot joint operates, the rotating shaft rotates in a reciprocating mode, the second ring layer drives the first moving block to rotate in a reciprocating mode, the position between the first moving block and the second moving block is changed, space change is achieved, cooling liquid can move outwards and inwards from the outer connecting end, replacement of the cooling liquid is achieved, and the cooling effect is completed.

The invention discloses a variable flux memory motor adopting a consequent-pole double-layer staggered permanent magnet structure. Belongs to the field of motor design and manufacturing. Each layer of permanent magnet in the variable flux memory motor adopts a high coercive force (HCF) permanent magnet and a low coercive force (LCF) permanent magnet, the HCF and the LCF in each layer of permanent magnet form a parallel magnetic circuit, and the HCF and the LCF between the two layers of permanent magnets are arranged in a staggered manner to form a series magnetic circuit, so that the double-layer U-shaped staggered permanent magnet structure can have the advantages of series connection and parallel connection of the two permanent magnets; and meanwhile, good load magnetic stabilization capability and a wide magnetic adjustment range are achieved. In addition, the consequent pole permanent magnet design can effectively reduce the magnetic circuit magnetic resistance and improve the LCF magnetizing and demagnetizing effect.

The invention provides a rotor punching sheet, a rotor iron core, a rotor, a motor and an air conditioner, the rotor punching sheet is provided with more than two magnetic pole forming areas corresponding to rotor magnetic poles, and each magnetic pole forming area is internally provided with a magnetic steel groove which is arranged on a q axis and extends along the radial direction; the rotor punching sheet is provided with a first magnetic barrier groove located on the d axis between every two adjacent magnetic steel grooves. Wherein first magnetic bridges are formed between the first magnetic barrier grooves and the adjacent magnetic steel grooves on the two sides, and the width of each first magnetic bridge is gradually increased in the radial outward direction of the rotor punching sheet. According to the technical scheme of the invention, the magnetic lines of force can be gradually drawn close to the d axis from the two sides of the d axis, and the sinusoidal property of the magnetic flux in the air gap is better, so that the torque pulsation of the tangential motor can be reduced.

The invention provides an integrated electric wheel driving device, which relates to the technical field of non-contact linear driving, and comprises a stator, a magnetic wheel, a conductor plate, a rim and a rotating shaft, the stator is of an arc-shaped structure, and the arc-shaped structure is cut off in the circumferential direction to form an opening area. The magnetic wheel is arranged on the arc-shaped inner side of the stator; the conductor plate is arranged outside the opening area of the stator, and a gap is formed between the conductor plate and the radial outer side of the magnetic wheel; the rim is fixedly connected with the magnetic wheel; the rotating shaft is arranged in the center of the magnetic wheel and rotationally connected with the rim through a bearing. According to the invention, a set of Halbach magnetic wheel is used for simultaneously realizing spin driving and electric wheel driving functions, the motor stator is arranged at the outer side of the magnetic wheel, and the non-contact force driving of the electric wheel to the conductor plate is simultaneously realized by using the opening design, so that the utilization rate of a magnetic field is effectively improved, and the use amount of permanent magnets is reduced.

A stator ring-internal gear assembly for a transmission device comprising a planetary gear of a wheel hub drive for a vehicle, the assembly may include a stator ring of an electrically operable electric motor device of the wheel hub drive for providing a motor torque and an internal gear of the transmission device for translating the provided motor torque into a net torque. The stator ring and the internal gear may be directly fixed to one another by positive connection in a non-rotatable and tension-resistant manner. The stator ring and the internal gear may form a mono-lithic unit.

The invention discloses a rotor disc structure of an axial magnetic flux motor, which comprises a rotor piece arranged on a rotating shaft of a disc type motor, the rotor piece comprises a rotor disc and a carbon fiber layer, the rotating shaft is fixedly sleeved with an inner ring of the rotor disc, and the carbon fiber layer is arranged on an outer ring of the rotor disc to improve the mechanical strength of the rotor disc; the rotor permanent magnet piece is arranged on the rotor disc and provides a permanent magnet; and the compensation insulating part is arranged on the rotor disc, so that the eddy-current loss of the rotor disc in the high-speed rotation process is reduced, and groove gap compensation is provided for the rotor disc. The motor is reasonable in structural design, high in mechanical strength, small in heat productivity and capable of remarkably reducing eddy-current loss and remarkably improving the rated rotating speed. When the rotor disc rotates at a high speed to cut a magnetic induction line of the stator disc, an annular flowing current is generated in the circumferential direction of the mounting through hole, the current at the position can generate heat to cause eddy current loss, the compensation insulation block made of an insulation material enables the current at the position to be disconnected, and thus heat generation and eddy current loss of the rotor disc are reduced.

The invention provides a rotor structure and a motor. The rotor structure comprises a rotor iron core, a first permanent magnet, a second permanent magnet and a rotating shaft, the rotor iron core comprises an outer rotor iron core, a gap is formed between the outer rotor iron core and the rotating shaft, the outer rotor iron core is provided with a mounting groove, the first permanent magnet is mounted in the mounting groove, and the axial height of the first permanent magnet is larger than that of the outer rotor iron core; the second permanent magnet is arranged at the axial end part of the outer rotor iron core, a groove is formed in the second permanent magnet, the part, extending out of the outer rotor iron core in the axial direction, of the first permanent magnet is inserted into the groove, the first permanent magnet is magnetized in the radial direction and / or tangential direction of the rotor iron core, and the second permanent magnet is magnetized in the axial direction of the rotor iron core. The second permanent magnets and the outer rotor iron core are correspondingly provided with through hole parts which are through along the axial direction of the rotor iron core, and the through hole parts are internally provided with connecting parts. According to the rotor structure provided by the invention, the vibration noise of the motor can be effectively reduced while the torque output capability of the motor is ensured.

The invention provides a rotor structure with asymmetric magnetic poles, a permanent magnet motor and a manufacturing method, the rotor structure comprises an iron core, the iron core is provided with a shaft hole, a plurality of magnetic steel groups are arranged along the periphery of the shaft hole of the iron core at equal intervals, and each magnetic steel group comprises a plurality of permanent magnet mounting grooves and permanent magnets corresponding to the permanent magnet mounting grooves in number, a permanent magnet is arranged in each permanent magnet mounting groove; wherein the sizes of the plurality of permanent magnet mounting grooves are configured to be different, and the spatial position relationship among the plurality of permanent magnet mounting grooves is arranged to be an asymmetric structure. The sizes of the plurality of permanent magnet mounting grooves are configured to be different, so that the limitation of a traditional symmetrical structure is broken through. The asymmetric design can optimize the magnetic field distribution of the permanent magnet, so that the phase difference between the reluctance torque component and the permanent magnet torque component is greatly reduced, and the effective torque superposition of the reluctance torque component and the permanent magnet torque component under wider working conditions is realized.

A motor device includes a stator and a rotor. The stator includes: a stator core, fixed radially inside a motor case; and a coil, wound on teeth provided on the stator core. The rotor includes: a rotating shaft, rotatably supported by a bearing fixed to the motor case; a magnet, integrally provided on the rotating shaft; and an abutment member, fixed to the rotating shaft and abutted against the bearing from one axial side of the rotating shaft toward an other axial side of the rotating shaft. An axial central part of the magnet deviates to a side opposite to an abutment direction of the abutment member against the bearing with respect to an axial central part of the stator core.

The invention relates to a planar drive system (200), the planar drive system (200) comprising a stator unit (300) having a plurality of coil assemblies (321) for generating a stator magnetic field and at least one rotor (400) having a plurality of magnet units (410) for generating a rotor magnetic field, the stator magnetic field and the rotor magnetic field being magnetically coupled to each other via a magnetic coupling between the stator magnetic field and the rotor magnetic field. The rotor (400) can be driven on the stator unit (300), the rotor (400) having an energy storage device (419), an energy transmission structure (313) having a transmission unit (317) being formed on the stator unit (300), the rotor (400) comprising a mating transmission unit (429) which can be coupled to the transmission unit (317), and the rotor (400) being driven by the energy storage device (419) when the transmission element is coupled to the mating transmission element. Energy can be transmitted from the energy transmission structure (313) to the mover (400). The invention also relates to a method (100) for transmitting energy to a rotor (400, 423) in a planar drive system (200).