High efficiency electric machine for generating very high magnetic fields

Abstract

The utility model discloses a kind of motor of high efficiency generation ultra-high magnetic field, it is related to permanent magnet motor technical field, including: rotor structure, stator structure, magnetic steel and magnetic field shielding fold, reflection cover;The rotor structure includes: rotor shaft, rotor core, the rotor core is sleeved on the rotor shaft, the outer circumferential side wall of the rotor core is equipped with recess, the magnetic steel is arranged in the recess of the rotor core, and the magnetic steel with the rotor core between is equipped with the magnetic field shielding fold, reflection cover;The stator structure includes: stator core, stator winding coil, the stator core is wrapped the rotor core, the stator winding coil is wound in the stator core, and the stator winding coil with the magnetic steel is correspondingly arranged.The utility model can realize the technical effect of high efficiency generation ultra-high magnetic field.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet motor technology, and more specifically to a motor that efficiently generates an ultra-high magnetic field. Background Technology

[0002] An electric motor is a general term encompassing both electric motors and generators. Its primary function is to generate driving torque, serving as a power source for electrical appliances or various equipment. Traditional magnetic field generating devices, such as Helmholtz coils, multipole electromagnets, and rotating permanent magnets, can provide good magnetic field uniformity within a small area, but their magnetic induction intensity is relatively low.

[0003] In general, the rotor of a permanent magnet motor (whether external or internal) is made of permanent magnet steel. The strength of the magnet's magnetic field determines the number of turns in the stator coil, and the number of turns in the coil, expressed as the length of the enameled wire (copper wire), is an inseparable factor in the cost of the motor. Therefore, in order to minimize costs, long-term research has revealed that the rotor magnet's magnetic field strength has a certain proportional relationship with the number of turns or the length of the stator winding. That is, under the condition of equal output power and output voltage, increasing the strength of the rotor's magnetic field can reduce the number of turns or the total length of the winding. In the existing technology, Halebeck array magnets are used to increase the magnetic field strength of the rotor magnets. However, since Halebeck array magnets are composed of modular assembled magnets, they are not only costly and structurally complex, but also inconvenient to magnetize, and the structure is prone to disintegration and damage during high-speed operation. Therefore, increasing the magnetic strength of the rotor magnets to make them easier to manufacture, structurally stable, and cost-effective is the key point of this invention.

[0004] By using a method where the magnetic field circuit of the side of the rotor magnet that is covered forms a loop with the side that is not covered, the magnetic field is superimposed or reflected onto the side of the uncovered magnet, and the magnetic field strength on that side is simultaneously strengthened.

[0005] Therefore, how to provide a motor that can efficiently generate ultra-high magnetic fields is one of the technical problems that urgently need to be solved in this field. Utility Model Content

[0006] In view of this, the present invention provides a motor for efficiently generating an extremely high magnetic field. The purpose is to address the aforementioned shortcomings.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A high-efficiency motor for generating ultra-high magnetic fields includes: a rotor structure, a stator structure, magnets, and magnetic field shielding and reflective sleeves; The rotor structure includes: a rotor shaft and a rotor core. The rotor core is sleeved on the rotor shaft. The outer peripheral sidewall of the rotor core is provided with a groove. The magnet is disposed in the groove of the rotor core, and a magnetic field shielding and reflecting sleeve is provided between the magnet and the rotor core. The stator structure includes: a stator core and a stator winding coil. The stator core encloses the rotor core, and the stator winding coil is wound inside the stator core. The stator winding coil is arranged correspondingly to the magnet.

[0008] Preferably, the groove on the outer peripheral sidewall of the rotor core is trapezoidal, and the magnet, the magnetic field shielding fold, and the reflective sleeve are all trapezoidal.

[0009] The present invention achieves the following technical advantages over the prior art: The outer peripheral sidewall of the rotor core is provided with a groove, the magnet is disposed in the groove of the rotor core, and the magnetic field shielding and reflecting sleeve is provided between the magnet and the rotor core. The stator winding coil is wound inside the stator core, and the stator winding coil is correspondingly arranged with the magnet to form a circuit, which will superimpose or reflect the magnetic field onto the surface of the un-shrouded magnet, thereby strengthening the magnetic field strength on that surface, thus achieving efficient generation of ultra-high magnetic field.

[0010] The groove on the outer peripheral sidewall of the rotor core is trapezoidal, and the magnet, the magnetic field shielding fold, and the reflective sleeve are also trapezoidal, which facilitates snap-fit ​​positioning. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the twelve sets of stator winding coils in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the thirty-six sets of stator winding coils in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the twelve sets of stator winding coils in Embodiment 2 of this utility model; Figure 4 This is a schematic diagram of the thirty-six sets of stator winding coils in Embodiment 2 of this utility model; In the picture: 1-Rotor structure; 11-Rotor shaft; 12-Rotor core; 2-Stator structure; 21-Stator core; 22-Stator winding coil; 3-Magnetic steel; 4-Magnetic field shielding folding and reflecting sleeve; 5-Motor housing. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Example 1 Reference Figure 1 , 2 The present invention discloses a high-efficiency motor for generating ultra-high magnetic fields, characterized in that it comprises: a rotor structure 1, a stator structure 2, magnets 3, and a magnetic field shielding and reflecting sleeve 4. The rotor structure 1 includes: a rotor shaft 11 and a rotor core 12. The rotor core 12 is sleeved on the rotor shaft 11, and the outer peripheral sidewall of the rotor core 12 has a groove. The magnets 3 are disposed within the grooves of the rotor core 12, and a magnetic field shielding and reflecting sleeve 4 is provided between the magnets 3 and the rotor core 12. The stator structure 2 includes: a stator core 21 and a stator winding coil 22. The stator core 21 encloses the rotor core 12, and there is a rotational gap between them. The stator winding coil 22 is wound inside the stator core 21, and the stator winding coil 22 is correspondingly arranged with respect to the magnets 3.

[0014] In this embodiment, the groove on the outer peripheral sidewall of the rotor core 12 is trapezoidal, and the magnet 3, the magnetic field shielding fold, and the reflective sleeve 4 are all trapezoidal, which facilitates the snap-fit ​​positioning of the magnet 3, the magnetic field shielding fold, and the reflective sleeve 4.

[0015] In this embodiment, the length of the groove is the same as the length of the stator or rotor.

[0016] The magnets 3 are configured in twelve groups, and the stator winding coils 22 are configured in twelve groups, with one group of magnets 3 corresponding to one group of stator winding coils 22. Alternatively, the stator winding coils 22 are configured in thirty-six groups, with one group of magnets 3 corresponding to three groups of stator winding coils 22.

[0017] In this embodiment, the stator winding coil 22 and magnet 3 can be configured as six groups, eight groups, ten groups...one hundred groups, etc. The present invention has a wide range of limitations on the number of stator winding coils 22 and magnet 3.

[0018] In this embodiment, it also includes: a motor housing 5, which is sleeved on the outside of the stator core 21.

[0019] Homework process: The rotor core 12 is sleeved on the rotor shaft 11, and the magnet 3 is placed in the groove of the rotor core 12. A magnetic field shielding and reflecting sleeve 4 is provided between the magnet 3 and the rotor core 12. The stator core 21 encloses the rotor core 12, and the stator winding coil 22 is wound inside the stator core 21, with the stator winding coil 22 corresponding to the magnet 3. The rotor core 12 rotates, and the rotating magnetic field cuts the internal magnetism, inducing an electromotive force in the rotor core 12, generating an electromagnetic force, and forming an electromagnetic torque.

[0020] This invention involves covering one side of the magnet 3 (the side not facing the stator winding) with an open, galvanized, electrical-grade pure iron jacket. The magnetic field circuit on the covered side forms a loop with the uncovered side, thus superimposing or reflecting the magnetic field onto the uncovered magnet surface. This strengthens the magnetic field intensity on the uncovered side, as confirmed by testing. When the rotor, with its strengthened magnetic field lines, rotates and cuts the stator winding coils, this reduces the number of winding turns or the length of the winding wire. This not only effectively reduces the amount of copper (non-ferrous metal) required for the winding coils, but also, due to the reduced number of turns or length of the winding wires, the coil resistance is proportionally reduced, effectively reducing heat loss and improving motor efficiency. This structure is applicable not only to permanent magnet synchronous motors or generators, but also to both external and internal rotor types, and regardless of whether the stator winding is single-coil or double-crossed. This invention is subject to limitations.

[0021] Example 2 Reference Figure 3 , 4 The motor shown is a high-efficiency generator that generates an ultra-high magnetic field. Based on embodiment 1, the inner circumferential surface of the rotor core 12 is provided with a trapezoidal groove. The magnet 3, the magnetic field shielding fold, and the reflective sleeve 4 are set in a trapezoidal shape, and the magnet 3, the magnetic field shielding fold, and the reflective sleeve 4 are all snapped and positioned inside the rotor core 12. The rotor core 12 wraps around the stator core 21, and the stator winding coil 22 is wound around the stator core 21.

[0022] The magnets 3 are configured in twelve groups, and the stator winding coils 22 are configured in twelve groups, with one group of magnets 3 corresponding to one group of stator winding coils 22. Alternatively, the stator winding coils 22 are configured in thirty-six groups, with one group of magnets 3 corresponding to three groups of stator winding coils 22.

[0023] In this embodiment, the stator winding coil 22 and magnet 3 can be configured as six groups, eight groups, ten groups...one hundred groups, etc. The present invention has a wide range of limitations on the number of stator winding coils 22 and magnet 3.

[0024] This utility model applies to all electric motors and generators that use permanent magnets as stators and rotors, regardless of whether the structure is internal or external rotor and whether the stator is single-coil or multi-coil.

[0025] Example 3 Based on Examples 1 and 2, a magnetic field reflective shielding sleeve is adopted. The magnetic field reflective shielding sleeve is made of a high magnetic permeability material such as galvanized electrical pure iron, or silicon steel, polycrystalline material, or beryllium-molybdenum alloy. The magnetic field reflective shielding sleeve reduces leakage magnetic field and harmonic loss and provides a strong magnetic field.

[0026] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A motor that efficiently generates an ultra-high magnetic field, characterized in that, include: The rotor structure (1), stator structure (2), magnet (3), and magnetic field shielding and reflective sleeve (4); The rotor structure (1) includes: a rotor shaft (11) and a rotor core (12). The rotor core (12) is sleeved on the rotor shaft (11). The outer peripheral sidewall of the rotor core (12) is provided with a groove. The magnet (3) is disposed in the groove of the rotor core (12). The magnetic field shielding and reflection sleeve (4) is provided between the magnet (3) and the rotor core (12). The stator structure (2) includes: a stator core (21) and a stator winding coil (22). The stator core (21) encloses the rotor core (12). The stator winding coil (22) is wound inside the stator core (21), and the stator winding coil (22) is correspondingly arranged with the magnet (3).

2. The motor for generating ultra-high magnetic fields with high efficiency according to claim 1, characterized in that, The groove on the outer peripheral sidewall of the rotor core (12) is trapezoidal, and the magnet (3), the magnetic field shielding fold, and the reflective sleeve (4) are all trapezoidal.

Images