CN111064335B - E-shaped double-winding stator axial flux motor made of amorphous material - Google Patents
E-shaped double-winding stator axial flux motor made of amorphous material Download PDFInfo
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- CN111064335B CN111064335B CN202010000807.0A CN202010000807A CN111064335B CN 111064335 B CN111064335 B CN 111064335B CN 202010000807 A CN202010000807 A CN 202010000807A CN 111064335 B CN111064335 B CN 111064335B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
Abstract
The invention discloses an E-type double-winding stator axial flux motor based on amorphous materials, which is simple in structure and production process and easy to realize, and the special structure enables the heat dissipation of a winding copper wire to be easier. The novel motor comprises a stator combination part and a rotor part, wherein the stator combination part comprises an E-shaped iron core and a double-winding copper wire, and the rotor part comprises a rotor iron core and a magnet. The stator module is designed by using a double-winding E-shaped iron core, the iron core is made of amorphous materials and is formed by cutting E-shaped thin sheets and laminating, the production process is simple, and the iron loss of the stator is greatly less than that of the traditional silicon steel sheet iron core. Meanwhile, the double-winding design can flexibly adjust the current distribution in the two sets of windings, the running redundancy and reliability of the motor are increased, and the motor can still rely on the other set of windings to realize partial torque output under the condition that one set of windings fails.
Description
Technical Field
The invention relates to an E-type double-winding stator axial flux motor made of amorphous materials, and realizes the design of a low-loss high-power-density modular motor.
Background
Electric and hybrid vehicle motors require low loss high power density designs due to space weight limitations. At present, a new energy automobile motor mostly adopts a radial permanent magnet flux motor, and compared with an axial flux motor, the torque power density is smaller. In addition, the copper wire of the radial flux motor is wrapped in the stator core, so that heat dissipation is difficult, current density is difficult to improve, and power density cannot be further improved. Therefore, in recent years, companies and research institutes have been considering designing and applying an axial flux motor to further improve the power density of a motor for a new energy automobile. Axial flux machines are also desirable for other applications requiring high power, lightweight machines. Compared with the traditional radial flux motor, the axial flux motor after the optimized design can enable the electric vehicle and the electric motorcycle to have higher speed, lighter component and higher power output. Axial flux machines are more efficient due to the enhanced cooling capability, since the coils can be pressed directly into the outer machine housing at a cooling rate that is faster than radial flux machines, which require the transfer of heat from the coils through the stator of the machine. Compared with the existing axial flux motor, the E-type double-winding stator axial flux motor based on the amorphous material realizes further modular design, and the heat dissipation area of the copper coil is larger than that of the existing axial flux motor.
Disclosure of Invention
The technical problem is as follows: in order to further improve the power density of the axial flux motor, reduce the integral loss of the motor and simplify the production process, the invention provides an E-type double-winding stator axial flux motor based on amorphous materials. The motor stator adopts a modular design, and a single module is formed by laminating E-shaped iron core structures layer by layer. This design can greatly simplify the production and installation process of the stator.
The technical scheme is as follows: the invention discloses an E-type double-winding stator axial flux motor based on amorphous materials, which comprises a stator combination and a rotor.
The motor comprises a stator combination I positioned on the periphery and a rotor combination II positioned in the middle; the stator assembly is a modularized E-shaped iron core design and comprises a double winding consisting of an E-shaped stator iron core and a lower winding of an upper winding; the stator bifilar can use three-phase or multi-phase design and is wound on the E-shaped iron core, the rotor combination comprises a rotor iron core and rotor permanent magnets, the rotor magnets are labeled on the upper side and the lower side of the rotor iron core, and the rotor magnets and the E-shaped stator iron core form a magnetic circuit combination similar to a transformer; the stator combination and the rotor combination jointly form a three-phase or multi-phase axial flux permanent magnet synchronous motor.
Wherein the content of the first and second substances,
the rotor combination is composed of a rotor iron core and rotor permanent magnets, the rotor permanent magnets can be of any multi-pole design, when the rotor permanent magnets are labeled on two sides of the rotor iron core, the rotor permanent magnets on the two sides are identical in structural polarity, and a closed-loop axial magnetic flux magnetic circuit is formed by the rotor permanent magnets and the E-shaped stator modules.
The E-shaped stator core is formed by cutting an amorphous material into E-shaped sheets and then laminating the E-shaped sheets layer by layer.
The rotor permanent magnet is made of neodymium iron boron or other high-performance magnetic materials.
The rotor core can be formed by laminating amorphous or silicon steel sheets or other high-performance magnetic materials, and the laminating direction is consistent with the laminating direction of the stator.
The stator and the rotor of the E-type double-winding stator axial flux motor based on the amorphous material are coupled through axial flux, and the E-type double-winding stator axial flux motor is similar to the traditional transformer magnetic circuit coupling. The rotor permanent magnet body surface pastes in rotor core both sides, and the structure magnetic pole is unanimous. The single-side permanent magnets are designed alternately in N, S mode, when the rotor rotates, alternating current conversion counter electromotive force is induced on the stator side winding and coupled with the stator winding current to generate motor torque.
According to the E-type double-winding stator axial flux motor based on the amorphous material, the stator coil adopts a double-winding design, the two windings can independently supply power to operate, and the heat balance control of the motor is realized by adjusting the current distribution between the two windings. Meanwhile, the running redundancy and reliability of the motor can be increased by two sets of windings.
Meanwhile, the E-shaped iron core is also designed to be matched with an amorphous material for use. Compared with the traditional silicon steel sheet, the amorphous material is thinner, can reach 12 mu m, and has smaller iron loss compared with the silicon steel sheet. However, amorphous materials are not suitable for conventional stamping processes due to their brittleness, and therefore a simple repeated stator shape is required to simplify the machining process. The E-shaped iron core is simple in shape, and can be formed by shearing amorphous materials into a required shape and then laminating the amorphous materials layer by layer. The whole motor stator structure is formed by only combining the same E-shaped iron core, and the assembly process is simple. The stator adopts the duplex winding design, and copper line winding is on E type iron core, also can design extra heat dissipation channel between the E type iron core module, compares traditional axial flux motor, and heat radiating area is bigger, more is favorable to increasing current density and then increases the power density of motor. The design of the double windings can increase the redundancy and the reliability of the operation of the motor, and meanwhile, the heat balance distribution of the motor can be realized by adjusting the current distribution between the two sets of windings.
Has the advantages that: because the motor adopts an E-shaped stator axial magnetic flux structure and two sets of independent stator windings are used, the two layers of permanent magnets of the rotor and the stator form a magnetic circuit like a transformer. Therefore, the E-type double-winding stator axial flux motor has the following advantages: the motor is made of amorphous materials, has smaller iron loss compared with the traditional motor based on silicon steel sheets, and improves the motor efficiency. The amorphous material is brittle and easy to crack, and the amorphous material sheets are cut and pasted into an E shape and then are laminated together according to the characteristic of axial magnetic flux design. Compared with the traditional radial flux motor, the axial flux motor has the advantage of high power density. According to the motor provided by the invention, the stator is formed by the modularized E-shaped iron core, and the production and assembly processes are simple. The double winding is wound on the E-shaped iron core, so that the running redundancy of the motor is increased. Can increase extra heat dissipation channel between the different E type iron core modules, compare traditional motor, the radiating effect is better, can further increase the power density of motor.
Drawings
FIG. 1 is a three-dimensional schematic diagram of an amorphous material based E-type dual-winding stator axial flux machine;
FIG. 2 is a top view of an amorphous material based E-type dual winding stator axial flux electric machine;
fig. 3 and 4 are schematic diagrams of equipment of a single E-shaped stator and a single rotor of an amorphous material-based E-shaped double-winding stator axial flux motor;
FIG. 5 is a combined front and side view of a rotor of an amorphous material based E-type dual winding stator axial flux machine;
FIG. 6 is an assembled view of an E-core of an amorphous material based E-type dual winding stator axial flux machine;
FIG. 7 is a stator-rotor magnetic path coupling diagram for an amorphous material based E-type dual-winding stator axial flux machine;
among them are: a stator combination I and a rotor combination II; the permanent magnet motor comprises a stator iron core 1, an upper winding 2, a lower winding 3, a rotor permanent magnet 4 and a rotor iron core 5; a monolithic E-core 6.
Detailed Description
The specific implementation mode of the amorphous-material E-type double-winding stator axial flux motor is shown in fig. 1 and mainly comprises a stator combination part I and a rotor part II.
The stator combination part is shown in figures 3 and 4, and the motor comprises a stator combination I positioned at the periphery and a rotor combination II positioned in the middle; (ii) a The stator assembly is a modularized E-shaped iron core design and comprises a double winding consisting of an E-shaped stator iron core 1 and a lower winding 3 of an upper winding 2; the stator bifilar can use three-phase or multi-phase design and is wound on the E-shaped iron core, the rotor combination II comprises a rotor iron core 5 and a rotor permanent magnet 4, the rotor magnet is labeled on the upper side and the lower side of the rotor iron core, and forms a magnetic circuit combination similar to a transformer with the E-shaped stator iron core; the stator combination I and the rotor combination II jointly form a three-phase or multi-phase axial flux permanent magnet synchronous motor.
As shown in fig. 5, the rotor portion is composed of a rotor core 5 and a rotor permanent magnet 4. The rotor assembly II is composed of a rotor core 5 and rotor permanent magnets 4, the rotor permanent magnets 4 can be of any multi-pole design, and when the rotor permanent magnets are labeled on two sides of the rotor core 5, the rotor permanent magnets on the two sides have the same structural polarity and form a closed-loop axial magnetic flux magnetic circuit with the E-shaped stator module.
The E-shaped double-winding stator axial flux motor made of amorphous materials adopts an E-shaped stator core structure, the modular design is realized, and the stator can be composed of E-shaped stator core irons with different quantities. The E-shaped stator core is made of amorphous materials, so that the iron loss of the motor can be reduced.
In the amorphous E-type double-winding stator axial flux motor, the stator is cut and pasted into an E-type sheet by the amorphous material, and then laminated into an E-type stator module (figure 6). The double windings are wound on the outer side of the E-shaped iron core, and the heat balance control of the motor can be realized by adjusting the current distribution between the two windings. In addition, the double winding can also increase the redundancy and reliability of the operation of the motor.
The E-type double-winding stator axial flux motor made of the amorphous material is characterized in that a rotor core is made of the amorphous material or high-performance silicon steel sheets in an overlapping mode, and the overlapping direction is consistent with the overlapping direction of the stator core. The rotor permanent magnet is labeled on two sides of the rotor iron core, and the structure is constant. The single-side permanent magnet adopts an N, S-pole alternating structure, and when the motor rotates, alternating counter electromotive force can be generated in a stator winding.
In the amorphous E-type double-winding stator axial flux motor, a stator core, a winding, a rotor core and a permanent magnet form a complete closed-loop magnetic circuit (figure 7). The magnetic circuit is in the axial magnetic flux direction, and has larger power torque density compared with a radial magnetic flux motor.
The E-type double-winding stator axial flux motor made of the amorphous material is characterized in that the rotor permanent magnets are all high-performance permanent magnets such as neodymium iron boron and the like, the permanent magnet material is good in stability, large in coercive force, high in residual magnetism, easy to process and small in magnetic leakage.
The asymmetric non-air-gap vortex permanent magnet synchronous motor has the advantages that the stator can adopt a three-phase or multi-phase winding design, and the rotor can adopt a two-pole or multi-pole permanent magnet design, but the number of pole pairs of the rotor is consistent with that of the stator, so that synchronous operation is realized.
The E-type double-winding stator axial flux motor made of amorphous materials can be applied to new energy, electric automobiles and other applications requiring high power density.
Claims (2)
1. An E-type double-winding stator axial flux motor based on amorphous materials is characterized by comprising a stator combination (I) positioned at the periphery and a rotor combination (II) positioned in the middle; the stator assembly is a modularized E-shaped iron core design and comprises a double winding consisting of an E-shaped stator iron core (1) and a lower winding (3) of an upper winding (2); the stator double winding is wound on the E-shaped iron core by using a three-phase or multi-phase design, the rotor combination (II) comprises a rotor iron core (5) and rotor permanent magnets (4), the rotor magnets are attached to the upper side and the lower side of the rotor iron core, and the rotor magnets and the E-shaped stator iron core form a magnetic circuit combination similar to a transformer; the stator combination (I) and the rotor combination (II) jointly form a three-phase or multi-phase axial flux permanent magnet synchronous motor;
the rotor assembly (II) comprises a rotor iron core (5) and rotor permanent magnets (4), the rotor permanent magnets (4) are of any multi-pole design, and when the rotor permanent magnets are labeled on the two sides of the rotor iron core (5), the rotor permanent magnets on the two sides have the same structural polarity and form a closed-loop axial magnetic flux magnetic circuit with the E-shaped stator module;
the E-shaped stator core (1) is formed by cutting an amorphous material into an E-shaped sheet (6) and laminating the E-shaped sheet and the sheet layer by layer;
the rotor core (5) is formed by laminating amorphous or silicon steel sheets or other high-performance magnetic materials, and the laminating direction is consistent with the stator laminating direction.
2. Amorphous material based E-type double winding stator axial flux machine according to claim 1, characterized by the rotor permanent magnets (4) being made of neodymium iron boron or other high performance magnetic material.
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