CN111564914A

CN111564914A - DC motor

Info

Publication number: CN111564914A
Application number: CN202010413320.5A
Authority: CN
Inventors: 屈家发
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-08-21

Abstract

A direct current motor comprises a rotor and a stator, wherein the rotor comprises magnetic blocks which are arranged in an annular mode, the stator is arranged on the outer side of the rotor, a gap is formed between the rotor and the stator, the stator comprises an iron core, a coil is wound outside the iron core, the rotor can rotate on the inner side of the stator, and the rotor is fixed on a rotating shaft. The invention provides a direct current motor, which can realize the effects of high rotating speed and large torsion of the motor.

Description

DC motor

Technical Field

The invention relates to the technical field of motors, in particular to a direct current motor.

Background

The traditional motor has fewer windings, the length of the wound windings is equivalent to the length of a machine body and even larger than the machine body, the number of turns of the windings is reduced, and the contact area between excitation and an electromagnetic field is reduced. When the fan is in operation, the fan must be provided with a cooling fan, once the fan is damaged, the temperature rises rapidly and the fan is easy to burn; meanwhile, the rotating shaft is stressed greatly when rotating, the temperature is increased, the service life of the rotating shaft is shortened, and once the rotating shaft is damaged, a hall sweeping accident is easy to happen, so that the whole machine is scrapped.

Disclosure of Invention

The invention aims to provide a direct current motor, which can realize the effects of high rotating speed and large torsion of the motor.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a direct current motor comprises a rotor and a stator, wherein the rotor comprises magnetic blocks which are arranged in an annular mode, the stator is arranged on the outer side of the rotor, a gap is formed between the rotor and the stator, the stator comprises an iron core, a coil is wound outside the iron core, the rotor can rotate on the inner side of the stator, and the rotor is fixed on a rotating shaft.

Preferably, the inner side end of the magnetic block is fixedly connected with the rotor inner side ring, the outer side end of the magnetic block is fixedly connected with the rotor outer side ring, a through hole is formed in the middle of the rotor inner side ring, and the rotating shaft penetrates through the through hole and is fixedly connected with the rotor inner side ring.

Preferably, the inner end of the iron core is fixedly connected with the inner ring of the stator, and the outer end of the iron core is fixedly connected with the outer ring of the stator.

Preferably, an outer shell is arranged outside the stator outer ring.

Preferably, the magnetic block is of a gradual change structure with a wide outer end and a narrow inner end.

Preferably, the coil is of a gradual change structure with a wide outer end and a narrow inner end.

Preferably, side shells are arranged on two sides of the outer shell, a rotating shaft seat is arranged on each side shell, and the rotating shaft is arranged in the rotating shaft seat to rotate.

Preferably, the stator inner side ring, the stator outer side ring and the outer shell are all provided with a groove for the iron core to pass through, and the iron core is fixedly arranged in the groove.

Preferably, the rotor is provided with an induction magnetic block, the inner side of one side shell is provided with at least one group of detection devices, and each group of detection devices comprises two hall sensors.

Preferably, the motor is provided with a plurality of motors which are all arranged on the same rotating shaft.

Preferably, the stator outer ring is made of silicon steel material.

The invention provides a direct current motor which has the following beneficial effects:

1. the contact area between the electromagnetism and the permanent magnet is large,

2. according to ampere's law, under the condition of same power and current and voltage, the number of turns of the winding is far more than that of the traditional motor;

3. position detection is realized through the Hall sensor, and current commutation is realized through the IGBT module, so that the switching speed is increased, and the increase of the rotating speed is realized;

4. under the condition that the electromagnetism continuously changes magnetism and the permanent magnet continuously acts force, larger torsion can be generated, and the power utilization rate is increased;

5. when the rotating shaft is in a rotating state, under the condition of not changing the current direction, the braking can be rapidly realized, and the braking torque force is large;

6. the device can be transformed into a generator under the condition of not changing the structure of the body, realizes multiple purposes of one machine, and can be expanded to the fields of energy storage equipment, new energy automobiles and the like;

7. a plurality of groups of Hall sensors are adopted, once one group of Hall sensors fails, the rest Hall sensors can still ensure the normal operation of the device;

8. the side shell is made of stainless steel, so that magnetic loss is reduced.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a magnetic block of the present invention;

FIG. 3 is a top view of the core and coil of the present invention;

FIG. 4 is a schematic structural view of a side housing according to the present invention;

FIG. 5 is a schematic view of the outer stator ring of the present invention;

FIG. 6 is a schematic view of the external structure of the side of the present invention;

fig. 7 is a schematic structural diagram of another embodiment of the present invention.

Detailed Description

As shown in fig. 1, a dc motor includes a rotor and a stator, the rotor includes magnetic blocks 1 arranged in a ring shape, the stator is disposed outside the rotor, a gap 15 is disposed between the rotor and the stator, the stator includes an iron core 2, a coil 3 is wound outside the iron core 2, the rotor can rotate inside the stator, and the rotor is fixed on a rotating shaft 4.

Preferably, the inner side end of the magnetic block 1 is fixedly connected with the rotor inner side ring 5, the outer side end of the magnetic block is fixedly connected with the rotor outer side ring 6, a through hole is formed in the middle of the rotor inner side ring 5, and the rotating shaft 4 penetrates through the through hole and is fixedly connected with the rotor inner side ring 5.

Preferably, the inner end of the core 2 is fixedly connected to the stator inner ring 7, and the outer end is fixedly connected to the stator outer ring 8.

Preferably, an outer casing 9 is arranged outside the stator outer ring 8.

Preferably, as shown in fig. 2, the magnetic block 1 has a gradual change structure with a wide outer end and a narrow inner end.

Preferably, as shown in fig. 3, the coil 3 has a gradual structure with a wide outer end and a narrow inner end.

Preferably, as shown in fig. 4, side housings 10 are disposed on two sides of the outer housing 9, a rotating shaft seat 11 is disposed on the side housings 10, and the rotating shaft 4 is rotatably disposed in the rotating shaft seat 11. The side casing 10 is made of 304 stainless steel.

Preferably, as shown in fig. 5, the stator inner ring 7, the stator outer ring 8, and the outer housing 9 are provided with slots 12 through which the iron core 2 passes, and the iron core 2 is fixed in the slots 12.

Preferably, the rotor is provided with an induction magnet block 13, and at least one group of detection devices is arranged on the inner side of one side shell 10, and each group of detection devices comprises two hall sensors 14. The Hall sensor is used for detecting the rotating position of the rotor and transmitting a signal to the control module. The Hall sensor is connected with the control module, the control module is connected with the IGBT module, and the IGBT module is connected with the coil. After the device is electrified, the rotor moves under the action of relative acting force generated by the permanent magnet and the stator iron core, when the permanent magnet moves to the position corresponding to the iron core, the magnetic block is aligned with the Hall sensor, the Hall sensor sends a position signal to the control module, the control module sends an instruction to the IGBT module, and the control current is reversed, so that the magnetism of the iron core is reversed, and further the permanent magnet on the rotor continues to generate relative acting force, and the rotor is continuously pushed to rotate. If the rotor is in high rotation speed, the polarity of the iron core can be kept unchanged by not changing the current direction, so that great resistance is generated on the permanent magnet and the electromagnetic force in a static state, and the rotor can be quickly braked.

Preferably, the motor is provided with a plurality of motors which are all arranged on the same rotating shaft 4. Multiple motors can be arranged on the same rotating shaft.

Preferably, the stator outer ring 8 is made of silicon steel.

Fig. 6 is a schematic view of the outer structure of the device in use.

In the device, the number of the iron cores on the stator is 4-40, the number of the iron cores is even, the number and the positions of the magnetic blocks on the rotor correspond to the number of the iron cores, and in the patent, the number of the iron cores is preferably 12. The magnetic blocks on the rotor are arranged in an N, S-pole staggered mode.

As shown in figure 7, the device can change the parameters of the number of turns of the winding, the current and the like to change the acting force, can also enlarge the diameter of the device, can also increase a plurality of rotors and a plurality of stators which are connected in series to increase the torsion, and has flexible use and convenient adjustment.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.

Claims

1. A DC motor, including rotor and stator, characterized in that: the rotor comprises magnetic blocks (1) which are arranged in an annular mode, a stator is arranged on the outer side of the rotor, a gap (15) is formed between the rotor and the stator, the stator comprises an iron core (2), a coil (3) is wound outside the iron core (2), the rotor can rotate on the inner side of the stator, and the rotor is fixed on a rotating shaft (4).

2. A direct current motor according to claim 1, wherein: the inner side end of the magnetic block (1) is fixedly connected with the rotor inner side ring (5), the outer side end of the magnetic block is fixedly connected with the rotor outer side ring (6), a through hole is formed in the middle of the rotor inner side ring (5), and the rotating shaft (4) penetrates through the through hole and is fixedly connected with the rotor inner side ring (5).

3. A direct current motor according to claim 1, wherein: the inner side end of the iron core (2) is fixedly connected with the stator inner side ring (7), and the outer side end of the iron core is fixedly connected with the stator outer side ring (8).

4. A direct current motor according to claim 3, wherein: and an outer shell (9) is arranged on the outer side of the stator outer side ring (8).

5. A direct current motor according to claim 1, wherein: the magnetic block (1) is of a gradual change structure with a wide outer end and a narrow inner end.

6. A direct current motor according to claim 1, wherein: the coil (3) is of a gradual change structure with a wide outer end and a narrow inner end.

7. The direct current motor according to claim 4, wherein: lateral shells (10) are arranged on two sides of the outer shell (9), a rotating shaft seat (11) is arranged on the lateral shells (10), and the rotating shaft (4) is arranged in the rotating shaft seat (11) to rotate.

8. A direct current motor according to claim 1, wherein: all be equipped with on stator inside ring (7), stator outside ring (8) and shell body (9) and be used for supplying slot (12) that iron core (2) passed, iron core (2) are fixed to be located in slot (12).

9. The direct current motor according to claim 7, wherein: the rotor is provided with an induction magnetic block (13), the inner side of one side shell (10) is provided with at least one group of detection devices, and each group of detection devices comprises two Hall sensors (14).

10. A direct current motor according to claim 3, wherein: the motors are arranged in a plurality and are arranged on the same rotating shaft (4), and the stator outer side ring (8) is made of silicon steel materials.