CN111600414A

CN111600414A - Permanent magnet superposed stator brushless motor

Info

Publication number: CN111600414A
Application number: CN202010370753.7A
Authority: CN
Inventors: 张振军; 王法贺
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-08-28

Abstract

A permanent magnet superposed stator brushless motor is characterized in that 4 rotor magnetic shoes (3) which are sequentially arranged are fixed on the arc surface of a rotor body (2), 6 stator iron cores (4) are uniformly distributed around the rotor body (2), each stator iron core (4) is provided with 2 round holes (13), a stator superposed permanent magnet (7) is arranged between the outer ends of two adjacent stator iron cores (4) to be contacted, two end surfaces of the stator superposed permanent magnets (7) are matched with the side surfaces of the outer ends of the stator iron cores (4) contacted with the stator superposed permanent magnets, the 6 stator iron cores (4) are positioned between a first iron core fixing plate (11) and a second iron core fixing plate (12) and are fastened together by a fixing screw rod (14) penetrating through the round holes (13), the middle end of each stator iron core (4) is wound with an electromagnetic coil (5), a Hall detection signal enables the current to change the direction through a controller, thereby achieving brushless operation. The invention has the beneficial effects that: simple structure, low cost, large torque and remarkable energy-saving effect.

Description

Permanent magnet superposed stator brushless motor

Technical Field

The invention relates to the technical field of motors, in particular to a permanent magnet superposed stator brushless motor.

Background

The permanent magnet motor used in the market at present generally comprises a rotor, a stator, an end cover, a machine shell, silicon steel sheets, a tooth socket pole piece and the like, and is manufactured by a method of armoring magnetic stripes on the rotor or the stator. The inventor provides a permanent magnet rotor shielding type energy-saving motor in a patent ZL201720019431.1, which has the advantages of simple structure, good use performance and obvious energy-saving effect; the inventor provides a brushless energy-saving motor with a permanent magnet externally superposed rotor in patent ZL201821796204.0, so that the magnetic energy of the permanent magnet can be fully exerted on the useful work, the energy-saving effect is more obvious, and meanwhile, the detection signal of a Hall circuit is used for reversing the motor through a controller, and the efficient utilization of permanent magnet energy is realized. However, in further studies, it has been found that when the permanent magnets are superimposed on the stator core of the motor, the motor can perform more work with a small current and a small voltage.

Disclosure of Invention

The invention aims to provide a permanent magnet superposed stator brushless motor with simple structure, low cost, large torque and remarkable energy-saving effect, wherein a stator superposed permanent magnet (7) is superposed on a stator iron core (4), an electromagnetic coil (5) is wound on the stator iron core (4), when the electromagnetic coil (5) is electrified, an N-pole or S-pole magnetic field is generated on the stator iron core (4), the resultant force of superposition of permanent magnetic force and electromagnetic force is obtained in the permanent magnetic field and the electromagnetic field, and larger magnetic force is obtained on a pole shoe of the stator iron core, namely under the condition of not increasing electric quantity, the torque of a rotor body (2) is increased, the power of the motor is increased, and the best energy-saving effect is achieved.

The purpose of the invention is realized as follows:

a permanent magnet superposed stator brushless motor comprises a motor shaft (1), a rotor body (2), a stator core (4), a casing (8), a first casing end cover (9) and a second casing end cover (10), and is characterized in that 4 rotor magnetic shoes (3) which are sequentially arranged are fixed on the arc surface of the rotor body (2), the magnetic poles of each rotor magnetic shoe are radial magnetic poles, and the polarities of each adjacent rotor magnetic shoe are different; 6 stator cores (4) are uniformly distributed around the rotor body (2), 2 round holes (13) are formed in each stator core (4), the inner end of each stator core (4) is a pole shoe (6), the cross section of the outer end of each stator core (4) is in a horn shape, a stator superposed permanent magnet (7) is arranged between the outer ends of two adjacent stator cores (4) to be contacted, the polarity directions of each stator superposed permanent magnet (7) are consistent, two end faces of each stator superposed permanent magnet (7) are mutually matched with the side face of the outer end of the stator core (4) contacted with the stator superposed permanent magnet, the cross section of each stator superposed permanent magnet (7) is in a sector shape, the outer arc of each stator superposed permanent magnet is mutually matched with the inner edge of the casing (8), and two ends of the outer arc of each stator superposed permanent magnet are respectively contacted with one end of the outer; the specification of iron core fixed plate (11) and iron core fixed plate two (12) is the same, the periphery is circular, the shape is the same with 6 stator core (4) and 6 stator stack permanent magnet (7) cross sections when making up together, 12 round hole (13) on the iron core fixed plate and the round hole one-to-one on stator core (4), 6 stator core (4) are located between iron core fixed plate (11) and iron core fixed plate two (12), and fasten together by fixed screw (14) that pass round hole (13), the middle-end of every stator core (4) all twines solenoid (5), its circular telegram direction is by hall circuit control.

The motor shaft (1) is positioned on the central line of the rotor body (2), two ends of the motor shaft (1) respectively penetrate through the first shell end cover (9) and the second shell end cover (10) and can rotate, and the first shell end cover (9) and the second shell end cover (10) are respectively fixed with two ends of the shell (8).

The invention has the beneficial effects that: simple structure, low cost, large torque and remarkable energy-saving effect.

Drawings

Fig. 1 is a schematic diagram of the working principle of the present invention.

FIG. 2 is a schematic side cross-sectional view of the present invention.

Fig. 3 is a schematic view of a first iron core fixing plate according to the present invention.

Reference numbers in the figures: the motor comprises a motor shaft 1, a rotor body 2, a rotor magnetic shoe 3, a stator core 4, an electromagnetic coil 5, a pole shoe 6, a stator superposed permanent magnet 7, a casing 8, a first casing end cover 9, a second casing end cover 10, an iron core fixing plate I11, an iron core fixing plate II 12, a circular hole 13 and a fixing screw 14.

Detailed Description

For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and accompanying fig. 1, 2 and 3, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.

A permanent magnet superposed stator brushless motor comprises a motor shaft (1), a rotor body (2), a stator core (4), a housing (8), a first housing end cover (9) and a second housing end cover (10). 4 rotor magnetic shoes (3) which are arranged in sequence are fixed on the cambered surface of the rotor body (2), the magnetic pole of each rotor magnetic shoe is a radial magnetic pole, and the polarities of each adjacent rotor magnetic shoe are different; 6 stator cores (4) are uniformly distributed around the rotor body (2), 2 round holes (13) are formed in each stator core (4), the inner end of each stator core (4) is a pole shoe (6), the cross section of the outer end of each stator core (4) is in a horn shape, a stator superposed permanent magnet (7) is arranged between the outer ends of two adjacent stator cores (4) to be contacted, the polarity directions of each stator superposed permanent magnet (7) are consistent, the two end faces of each stator superposed permanent magnet (7) are matched with the side face of the outer end of the stator core (4) contacted with the stator superposed permanent magnet, the design increases the magnetic contact area of the stator cores (4) and the stator superposed permanent magnets (7), increases the magnetic energy density of the stator cores, the cross section of the stator superposed permanent magnets (7) is in a fan shape, the outer circular arcs of the stator superposed permanent magnets are matched with the inner edge of the shell (8), and the two outer ends of the outer circular arcs are respectively contacted with one ends of the outer circular, due to the design, magnetic leakage does not exist between the adjacent stator superposed permanent magnets (7); the specification of iron core fixed plate (11) and iron core fixed plate two (12) is the same, the periphery is circular, the cross section when shape and 6 stator core (4) and 6 stator stack permanent magnet (7) combination are together is the same, 12 round holes (13) on the iron core fixed plate and the round hole one-to-one on stator core (4), two iron core fixed plates all adopt the preparation of non-magnetism nature stainless steel, 6 stator core (4) are located between iron core fixed plate (11) and iron core fixed plate two (12), and by fixed screw (14) the fastening that passes round hole (13) together, the middle-end of every stator core (4) all twines solenoid (5), its circular telegram direction is by hall circuit control. In this embodiment, the two core fixing plates are the clamping plates of the stator core with 6 poles.

The motor shaft (1) is positioned on the central line of the rotor body (2), two ends of the motor shaft (1) respectively penetrate through the first shell end cover (9) and the second shell end cover (10) and can rotate, the first shell end cover (9) and the second shell end cover (10) are respectively fixed with two ends of the shell (8), and the materials can be aluminum or iron.

In actual manufacturing, a stator core is fixed between two core fixing plates, fixing screws are inserted to screw bolts, electromagnetic coils are wound on the stator core, and the whole stator is pressed into a specified position of a shell after the coils of all the poles are wound.

Referring to fig. 1, 2 and 3, the working principle is as follows:

when the electromagnetic coil (5) is electrified, the pole shoe (6) becomes an N pole or an S pole, and according to the mutual attraction and the mutual repulsion of the opposite poles and the same poles, the iron core of the pole shoe (6) interacts with the N pole or the S pole of the rotor magnetic shoe (3) on the cambered surface of the rotor body (2), so that the rotor body (2) rotates to do work. When the rotor body (2) rotates for a certain angle, the rotor body (2) can continue to rotate downwards by changing the current direction of the electromagnetic coil (5). The magnetic force of the pole shoe (6) is the resultant force of the permanent magnetic force superposed on the electromagnetic force, so that the rotating torque of the rotor body (2) is increased, namely the power of the motor is increased.

The direction of energization of the solenoid is controlled by a hall circuit (known in the art). When the Hall detects that the polarity of the rotor body (2) at the position changes, a signal is transmitted to the controller, and the controller changes the electrifying direction to enable the rotor body (2) to rotate without brush all the time.

Claims

1. A permanent magnet superposed stator brushless motor comprises a motor shaft (1), a rotor body (2), a stator core (4), a casing (8), a first casing end cover (9) and a second casing end cover (10), and is characterized in that 4 rotor magnetic shoes (3) which are sequentially arranged are fixed on the arc surface of the rotor body (2), the magnetic poles of each rotor magnetic shoe are radial magnetic poles, and the polarities of each adjacent rotor magnetic shoe are different; 6 stator cores (4) are uniformly distributed around the rotor body (2), 2 round holes (13) are formed in each stator core (4), the inner end of each stator core (4) is a pole shoe (6), the cross section of the outer end of each stator core (4) is in a horn shape, a stator superposed permanent magnet (7) is arranged between the outer ends of two adjacent stator cores (4) to be contacted, the polarity directions of each stator superposed permanent magnet (7) are consistent, two end faces of each stator superposed permanent magnet (7) are mutually matched with the side face of the outer end of the stator core (4) contacted with the stator superposed permanent magnet, the cross section of each stator superposed permanent magnet (7) is in a sector shape, the outer arc of each stator superposed permanent magnet is mutually matched with the inner edge of the casing (8), and two ends of the outer arc of each stator superposed permanent magnet are respectively contacted with one end of the outer; the specification of the first iron core fixing plate (11) and the second iron core fixing plate (12) is the same, the periphery of the first iron core fixing plate is circular, the shape of the first iron core fixing plate is the same as the cross section of the 6 stator iron cores (4) and the 6 stator superposed permanent magnets (7) when combined together, 12 round holes (13) in the iron core fixing plate correspond to the round holes in the stator iron cores (4) one by one, the 6 stator iron cores (4) are located between the first iron core fixing plate (11) and the second iron core fixing plate (12) and are fastened together by fixing screw rods (14) penetrating through the round holes (13), the middle end of each stator iron core (4) is wound with an electromagnetic coil (5), and the electrifying direction of the electromagnetic; the motor shaft (1) is positioned on the central line of the rotor body (2), two ends of the motor shaft (1) respectively penetrate through the first shell end cover (9) and the second shell end cover (10) and can rotate, and the first shell end cover (9) and the second shell end cover (10) are respectively fixed with two ends of the shell (8).