WO2015085771A1

WO2015085771A1 - High-powered motor without silicon steel sheet

Info

Publication number: WO2015085771A1
Application number: PCT/CN2014/082399
Authority: WO
Inventors: 陈国芳; 龚天波; 陈俊
Original assignee: 陈国芳; 龚天波
Priority date: 2013-12-13
Filing date: 2014-07-17
Publication date: 2015-06-18
Also published as: CN104716767A

Abstract

A high-powered motor without a silicon steel sheet, comprising: a stator, a rotor; a plurality of permanent magnet blocks are evenly arranged on the circumference of the rotor, adjacent magnet blocks having opposite polarity; a Hall sensor is provided on the inner side of the stator; the present invention is characterized in that: coil layers are formed by integrally hot pressing plastic composite material, and the plastic contains magnetic powder therein. The stator of the present invention uses multiple layers of coils formed by hot pressing plastic composite material into a ring shape, and the composite material contains magnetic powder, is magnetic conductive only when the coils are energized, and has good insulating property, with no magnetic flux leakage, low magnetic circuit impedance and high permeability, thus greatly reducing the number of coils and the use of copper wire. Compared with a traditional brushless permanent magnet motor, the present invention can reduce coils by 1/3and magnet blocks by 1/2 given the same power, and can increase the output power of the motor by 15-20% and reach 88% of effective power given the same energy consumption.

Description

Manual High-power silicon-free steel sheet motor Technical field

The invention relates to a high power silicon-free steel sheet motor. Background technique

In the existing DC motor, the conversion efficiency of electric energy is low, and the coil and the magnetic block have many consumables and low utilization rate. Summary of the invention

The technical problem to be solved by the present invention is to provide a silicon-free steel sheet motor capable of greatly reducing the amount of coils and magnetic blocks.

In order to solve the above technical problem, the present invention provides a silicon-free steel sheet motor comprising a stator and a rotor disposed coaxially and in parallel; the stator comprises: three layers of coil layers distributed in parallel, each coil layer being sequentially connected in series The planar fan coils are evenly distributed around the circumference; the rotor has a plurality of permanent magnet blocks uniformly distributed on the same circumference, and the adjacent magnetic blocks have opposite polarities, and a Hall sensor is disposed on the inner side surface of the stator, and the features are: Each coil layer is heat-compressed by a plastic composite material, and the plastic composite material contains 5-50% by weight of magnetic powder, and the balance is plastic or resin, such as one or more of PP, PS, PC, and the like.

In the three-layer coil layer, the structure and shape of each coil layer are the same, and the beginnings of the coil layers are distributed by 120 °, and the terminals of the coil layers are connected.

The number of turns of each planar fan coil is at least 2匝, which can be arbitrarily adjusted according to the motor power.

The number of planar fan coils in each coil layer is at least four, and the winding mode is the same. The number of planar fan coils can be arbitrarily adjusted according to the motor power.

Each permanent magnet block is fan-shaped and symmetrically distributed with the center of the circumference. The number of permanent magnet blocks can be arbitrarily adjusted according to the motor power.

When the number of planar fan coils is large (for example, seven or more), in the same coil layer, portions between adjacent planar fan coils are overlapped.

The Hall sensor includes three, and when one of them is between a pair of adjacent permanent magnet blocks, the remaining two are respectively disposed opposite to the pair of permanent magnet blocks.

Each coil layer is wound from a single wire to ensure the quality of the motor.

The stator includes a pair of symmetrically disposed on both sides of the rotor, and the cover plate adjacent to each stator is a magnetic conductive cover; the rotor includes: a pair of guide disks separated by a separator of non-magnetic material, a permanent magnet block on the disk body; the pair of conductive disk bodies are coaxially disposed parallel to the partition plate; and the polarity of the permanent magnet block on the pair of conductive disk bodies is symmetrical. The stator includes a pair of symmetry, which is beneficial to increase the power of the motor, and at the same time, the force on both sides of the rotor is The specification is uniform, and the stator includes a pair of symmetrically disposed on both sides of the rotor, the permanent magnet block on the rotor is embedded in the mounting hole of the rotor body, or the rotor includes a pair of adjacent structures disposed opposite each other, the pair of rotors The polarity of the permanent magnet block is symmetrical.

In a specific implementation, the rotor is fixed on a rotating shaft, the rotating shaft bearing is matched in a pair of bearing seats, and the stator and the rotor are located between the pair of bearing seats; each of the magnetic conductive cover plates, the stator and the rotor are disposed in a non-conductive In a magnetic annular casing.

Compared with the prior art, the technical effects of the invention are as follows: (1) The silicon-free steel sheet motor of the invention does not need a silicon steel sheet, and the stator adopts a multi-layer coil layer which is hot-pressed into a ring shape by a plastic composite material, and the thickness is generally less than 1 cm. The composite material contains magnetic powder which conducts electricity only when the coil is energized and has good insulation properties. Therefore, there is no magnetic leakage and the magnetic circuit impedance is small, and the magnetic permeability is high, so that the number of turns of the coil can be greatly reduced, and the amount of the copper wire can be reduced. Compared with the traditional brushless permanent magnet motor, the total coil turns can be reduced by 1/3 and the magnetic block usage is reduced by 1/2 under the same power conditions. Under the same energy consumption, the motor output power is increased by 15-20. %, effective power up to 88%. (2) The motor of the present application does not need a silicon steel sheet, and the stator adopts a multi-layer coil layer which is hot-pressed by a plastic composite material and has a thickness of generally less than 1 cm. The composite material contains magnetic powder, which is only magnetically conductive when the coil is energized, and Good insulation performance. (3) Since the stator and the rotor of the motor of the present application are arranged adjacent to each other in parallel and coaxially, the stator has a small thickness, so the volume is small, and the magnetic field generated by the coil layer and the permanent magnet block on the rotor constitute a closed magnetic circuit. DRAWINGS

In order to clearly illustrate the innovative principles of the present invention and its technical advantages over prior art products, possible embodiments are illustrated below by way of non-limiting examples of the application of the principles described herein. In the drawings - Figure 1 is a schematic cross-sectional view of a high power silicon-free steel sheet motor of the present invention;

2 is a positional correspondence diagram between the three Hall sensors and a pair of adjacent permanent magnet blocks on the rotor; FIG. 3 is an embodiment of the rotor of the present invention;

Figure 4 is another embodiment of the rotor of the present invention, wherein is given;

Figure 5 is a structural view showing the end face of the A-phase coil in the motor;

Figure 6 is a structural view showing the end face of the B-phase coil in the motor;

Figure 7 is a cross-sectional structural view of a C-phase coil in the motor;

8 is a schematic view showing a distribution structure of a coil in the three-phase motor;

9 is a schematic structural view of a plurality of planar sector coils in the coil layer separated by reference numerals: 1. an annular casing, 2. a magnetically conductive cover plate, 3. a permanent magnet block, 4. a phase A coil layer, 5. Phase B coil layer, 6. Phase C coil layer, 7. Bearing housing, 8. Bearing, 9 shaft, 10. Stator, 11. Hall sensor, 12 rotor, 13. Magnetic shield, 14. Non-magnetic Cover plate, 15. Sector flat coil. Detailed description of the specification

As shown in FIG. 1-9, the silicon-free steel sheet motor of the present invention comprises an annular casing 1 , a pair of stators 10 and rotors 12 coaxially disposed in the casing, and a bearing matched with the rotating shaft 9 of the rotor 12 . For the bearing block 7, each bearing block 7 is fixed in the annular casing 1 by a corresponding cover plate, and each coil layer on the stator comprises 18, 21, 24 or 27 sector-shaped planar coils 15.

The permanent magnet blocks 3 on the rotor 12 are 2-20, symmetrically distributed with the center of the circumference.

The coil layers are heat-compressed by a plastic composite material, and the plastic contains 20% or 10% or 30% or 40% or 50% by weight of magnetic powder. The magnetic powder is one or more of iron oxide magnetic powder, cobalt-iron oxide magnetic powder, and chromium dioxide magnetic powder.

The outer side of the stator 10 is provided with a magnetic conductive cover 2, and the magnetic conductive cover 2, the stator 10, and the rotor 12 are disposed in the non-magnetically-oriented annular casing 1.

The motor of the present application does not need a silicon steel sheet, and the stator adopts a multi-layer coil layer which is hot-pressed into a ring shape by a plastic composite material, and the thickness is generally less than 1 cm. The composite material contains magnetic powder, which conducts magnetic only when the coil is energized, and has good insulation performance. .

Since the stator and the rotor 12 of the motor of the present application are arranged adjacent to each other in parallel and coaxially, the stator is thin, and therefore the volume is small, and the magnetic field generated by the coil layer and the permanent magnet block on the rotor 12 constitute a closed magnetic circuit.

Since the composite material is magnetically guided only when the coil is energized, there is no magnetic leakage and the magnetic circuit impedance is small, and the magnetic permeability is high, so that the number of turns of the coil can be greatly reduced, and the amount of the copper wire can be reduced.

Compared with the traditional brushless permanent magnet motor, the total coil turns can be reduced by 1/3 and the magnetic block usage is reduced by 1/2 under the same power conditions. Under the same energy consumption, the motor output power is increased by 15-20. %, effective power up to 88%

1 is a high-power silicon-free steel sheet motor in which a cover plate adjacent to the stator 10 is a magnetic conductive cover 2, and a cover plate of the rotor is a non-magnetic conductive cover 14. The stator 10 includes a pair of symmetrically disposed on both sides of the rotor, and a cover plate adjacent to an outer side of each stator 10 is a magnetic conductive cover 2; the rotor 12 includes: a pair of separators 13 separated by a non-magnetic material a magnetic disk body, a permanent magnet block 3 disposed on the conductive disk body; the pair of conductive disk bodies are coaxially disposed parallel to the partition plate 13; and the polarity of the permanent magnet block 3 on the pair of conductive disk bodies is symmetrical. The rotor is fixed on the rotating shaft, the rotating shaft bearing is matched in a pair of bearing seats, and the stator and the rotor are located between the pair of bearing seats; the magnetic conductive cover plates, the stator and the rotor are arranged in a non-magnetically conductive annular outer casing. in.

Said motor control principle, be used in the prior art control principle is really permanent magnet brushless DC motor, or see the "planar motor design and control", author: Pan Jianfei, Cao Guangzhong, Zhang Zhou, Publisher: Science Press Published : 2011-6-1, ISBN: 9787030309594. It is apparent that the above-described embodiments are merely illustrative of the invention and are not intended to limit the embodiments of the invention. Other variations or modifications of the various forms may be made by those skilled in the art in light of the above description. There is no need and no way to exhaust all of the implementations. It is to be understood that these obvious variations or modifications which are obvious to the invention are still within the scope of the invention.

Claims

Claim

1. A silicon-free steel sheet motor comprising: a stator and a rotor disposed coaxially and in parallel;

The stator comprises: three layers of coil layers distributed in parallel, each coil layer is uniformly distributed by a plurality of planar fan coils which are sequentially connected in series; the rotor has a plurality of permanent magnet blocks uniformly distributed on the same circumference, and the poles of the adjacent magnetic blocks On the contrary, a Hall sensor is disposed on the inner side surface of the stator, wherein the coil layers are integrally pressed by a plastic composite material, and the plastic composite material contains 5-50 wt% of magnetic powder.

2. The silicon-free steel sheet motor according to claim 1, wherein: in the three-layer coil layer, the structure and shape of each coil layer are the same, and the beginning ends of the coil layers are different by 120 °, and each coil layer The terminals are connected.

The silicon-free steel sheet motor according to claim 1, wherein each of the planar sector coils has a number of turns of at least 2 turns.

4. The silicon-free steel sheet motor according to claim 1, wherein the number of the planar fan coils in each of the coil layers is at least four, and the winding manner is uniform.

5. The silicon-free steel sheet motor according to claim 1, wherein each of the permanent magnet blocks has a fan shape and is symmetrically distributed with the center of the circumference.

6. The silicon-free steel sheet motor according to claim 1, wherein: in the same coil layer, portions between adjacent planar sector coils are overlapped.

7. The silicon-free steel sheet motor according to claim 1, wherein: said Hall sensor comprises three, and when one of them is between a pair of adjacent permanent magnet blocks, the remaining two are respectively associated with the pair The permanent magnet blocks are relatively set.

8. The silicon-free steel sheet motor according to claim 1, wherein each of the coil layers is wound from a single wire.

9. The silicon-free steel sheet motor according to claim 1, wherein: said stator comprises a pair of symmetrically disposed on both sides of the rotor, and a cover plate adjacent to each stator is a magnetically conductive cover; said rotor comprises a pair of guiding discs separated by a separator of non-magnetic material, a permanent magnet block disposed on the guiding disc, the pair of guiding discs being coaxially arranged parallel to the partition;

The polarities of the permanent magnet blocks on the pair of conductive disks are symmetrical.

10 . The silicon-free steel sheet motor according to claim 8 , wherein: the rotor is fixed on a rotating shaft, the rotating shaft bearing is matched in a pair of bearing seats, and the stator and the rotor are between the pair of bearing seats; Each of the magnetic conductive cover, the stator and the rotor are disposed in a non-magnetically-oriented annular casing.