CN215268020U

CN215268020U - Direct current motor

Info

Publication number: CN215268020U
Application number: CN202121340406.6U
Authority: CN
Inventors: 李应光
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-12-21
Anticipated expiration: 2031-06-16

Abstract

The utility model belongs to the technical field of the motor, especially, relate to a direct current motor, include: a motor rotor; motor stator, including stator core and stator winding, stator core includes first stator core and the second stator core that the interval set up and all be the tube-shape on the axis of rotation, and stator winding includes first stator winding and second stator winding, and first stator winding includes the first forward current wire that N both ends set up at interval on the axis of rotation, and second stator winding includes the reverse current wire of the second that M both ends set up at interval on the axis of rotation. The utility model provides a can directly produce the direct current motor of torque through the direct current.

Description

Direct current motor

Technical Field

The utility model belongs to the technical field of the motor, especially, relate to a direct current motor.

Background

In a conventional motor, regardless of an ac motor or a so-called dc motor, a current in a winding of the motor is an ac current, and a so-called dc motor is only a dc current at a winding port, and an ac current is still in the winding, in which a brushless dc motor performs current conversion through an inverter, and a brushed dc motor performs current conversion through a commutator.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a direct current motor that can directly produce the torque through the direct current.

The utility model discloses a realize like this:

a direct current motor comprising:

the motor rotor is connected with a rotating shaft of which the central axis is a rotating axis, the motor rotor can form a motor magnetic field, and the magnetic field direction of the motor magnetic field is unchanged in the process that the motor rotor rotates around the rotating axis along with the rotating shaft;

the motor stator comprises a stator core and a stator winding, wherein the stator core comprises a first stator core and a second stator core which are arranged on a rotating axis at intervals and are both cylindrical, the stator winding comprises a first stator winding and a second stator winding, the first stator winding comprises N first positive current leads, two ends of the first positive current leads are arranged on the rotating axis at intervals, each first positive current lead is arranged on the inner cylinder wall of the first stator core and is arranged along the inner cylinder wall of the first stator core at intervals in the circumferential direction, the second stator winding comprises M second reverse current leads with two ends arranged on the rotating axis at intervals, each second reverse current lead is arranged on the inner cylinder wall of the second stator core and arranged along the inner cylinder wall of the second stator core at intervals in the circumferential direction, the current direction of the first forward current conductor is opposite to the current direction of the second reverse current conductor;

wherein the motor magnetic field forms a magnetic field radially scattered with a rotation axis as a central axis in each of the first stator core and the second stator core, a direction of the magnetic field in the first stator core is opposite to a direction of the magnetic field in the second stator core, when each of the first forward current leads is energized, each of the first forward current leads receives a first ampere force applied by the motor magnetic field, and the motor rotor receives a reaction force of the first ampere force and rotates around the rotation axis in a predetermined direction under the action of the reaction force of the first ampere force, when each of the second reverse current leads is energized, each of the second reverse current leads receives a second ampere force applied by the motor magnetic field, and the motor rotor receives the reaction force of the second ampere force and rotates around the rotation axis in the predetermined direction under the action of the reaction force of the second ampere force, n is more than or equal to 3, and M is more than or equal to 3.

Based on the utility model discloses, after letting in direct current for each first forward current wire and each second reverse current wire, electric motor rotor will rotate around the axis of rotation according to the predetermined direction under the effect of the reaction force of first ampere of power and the reaction force of second ampere of power, the reaction force of first ampere of power and the reaction force of second ampere of power make electric motor rotor pivoted torque promptly to realized the conversion of electric energy and mechanical energy, also be to convert direct current into rotatory kinetic energy, the current flow direction in each first forward current wire of this in-process and each second reverse current wire is fixed all the time, need not carry out the current transformation, therefore, the utility model discloses a direct current motor can directly produce the torque through the direct current.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a dc motor according to a first embodiment of the present invention, wherein a ring with a solid arrow is a magnetic circuit of the dc motor;

fig. 2 is a schematic circuit diagram of a stator winding of a dc motor according to an embodiment of the present invention;

fig. 3 is a partial structural view of a dc motor according to a first embodiment of the present invention, wherein the dc motor includes a motor stator and a magnetic field regulating winding;

fig. 4 is a perspective view of a partial structure of a dc motor according to a first embodiment of the present invention, wherein the dc motor includes a stator winding and a magnetic field regulating winding;

fig. 5 is a perspective view of a stator core of a dc motor according to a first embodiment of the present invention;

fig. 6 is a side view of a stator core of a dc motor according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view taken along line AA in FIG. 6;

FIG. 8 is a sectional view taken in the direction of BB in FIG. 6;

fig. 9 is a perspective view of a motor rotor of a dc motor according to a first embodiment of the present invention;

fig. 10 is a perspective view of a magnetic field regulating winding of a dc motor according to an embodiment of the present invention;

fig. 11 is a perspective view of a motor rotor of a dc motor according to a second embodiment of the present invention;

fig. 12 is a perspective view of a motor rotor of a dc motor according to a third embodiment of the present invention;

fig. 13 is a cross-sectional view of a dc motor according to a third embodiment of the present invention;

fig. 14 is an exploded view of a motor rotor of a dc motor according to a fourth embodiment of the present invention;

fig. 15 is a cross-sectional view of a dc motor according to a fourth embodiment of the present invention;

fig. 16 is an exploded view of a motor rotor of a dc motor according to a fifth embodiment of the present invention;

fig. 17 is a schematic circuit diagram of a stator winding of a dc motor according to an embodiment of the present invention;

fig. 18 is a perspective view of a partial structure of a dc motor according to a sixth embodiment of the present invention, wherein the dc motor includes a stator winding and a magnetic field regulating winding;

fig. 19 is a partial structural view of a dc motor according to a sixth embodiment of the present invention, which includes a motor stator and a magnetic field regulating winding;

fig. 20 is a side view of a stator core of a dc motor according to a sixth embodiment of the present invention;

FIG. 21 is a sectional view taken in the direction AA of FIG. 20;

FIG. 22 is a sectional view taken in the direction BB in FIG. 20;

fig. 23 is a schematic circuit diagram of a stator winding of a dc motor according to a seventh embodiment of the present invention;

fig. 24 is a perspective view of a partial structure of a dc motor according to a seventh embodiment of the present invention, wherein the dc motor includes a stator winding and a magnetic field regulating winding.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Motor rotor
110	Permanent magnet ring	1101	Permanent magnet
				111	First permanent magnet assembly	1111	First permanent magnet
112	Second permanent magnet assembly	1121	Second permanent magnet
				121	First rotor core	122	Second rotor core
123	Rotor core
				130	Magnetism isolating cylinder
200	Motor stator
				210	Stator core
211	First stator core	2111	First stator rack
				21101	First stator inner groove	21102	First stator outer groove
21103	First stator slot	21104	First tooth top groove
				212	Second stator core	2121	Second stator rack
21201	Second stator inner groove	21202	Second stator outer slot
				21203	Second stator slot	21204	Second tooth top groove
213	Connecting iron core
				220	Stator winding
221	First stator winding
				2211	First forward current conductor	2212	First reverse current conducting wire
222	Second stator winding
				2221	Second reverse current conducting wire	2222	Second forward current conductor
300	Rotating shaft
				400	Magnetic regulating winding	410	Magnetic regulating coil
500	Casing (CN)
				600	End cap
700	Excitation winding

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example one

The embodiment of the utility model provides a direct current motor.

Referring to fig. 1 to 10, the dc motor includes a motor rotor 100 and a motor stator 200; of course, in the specific implementation, the dc motor further includes a cylindrical casing 500 and two end caps 600 respectively disposed at two ends of the casing 500, which are not detailed herein since they are not related to the technical problems to be solved by the present invention.

Specifically, the motor rotor 100 is connected to the rotating shaft 300 having a central axis as a rotation axis, and the motor rotor 100 is capable of forming a motor magnetic field whose magnetic field direction is not changed during the rotation of the motor rotor 100 around the rotation axis along with the rotating shaft 300.

Motor stator 200 includes stator core 210 and stator winding 220, stator core 210 includes first stator core 211 and second stator core 212 that set up at interval on the axis of rotation and all are the tube-shape, stator winding 220 includes first stator winding 221 and second stator winding 222, first stator winding 221 includes N both ends first forward current wire 2211 that sets up at interval on the axis of rotation, each first forward current wire 2211 is located first stator core 211 inner tube wall and sets up at interval in circumference along first stator core 211 inner tube wall, second stator winding 222 includes M both ends second reverse current wire 2221 that sets up at interval on the axis of rotation, each second reverse current wire 2221 is located second stator core 212 inner tube wall and sets up at interval in circumference along second stator core 212 inner tube wall, the current direction of first forward current wire 2211 is opposite with the current direction of second reverse current wire 2221.

Wherein the motor magnetic field forms a magnetic field which is radially scattered by taking the rotation axis as a central axis at the first stator core 211 and the second stator core 212, the direction of the magnetic field in the first stator core 211 is opposite to the direction of the magnetic field in the second stator core 212, when each first forward current lead 2211 is energized, each first forward current lead 2211 experiences a first ampere force exerted by the motor magnetic field, the motor rotor 100 receives the reaction force of the first ampere force, and rotates around the rotation axis in a predetermined direction under the reaction force of the first ampere force, when each second reverse current lead 2221 is energized, each second reverse current lead 2221 is subjected to a second ampere force exerted by the motor magnetic field, and the motor rotor 100 is subjected to the reaction force of the second ampere force and rotates around the rotation axis in the preset direction under the action of the reaction force of the second ampere force, wherein N is more than or equal to 3, and M is more than or equal to 3.

Based on the utility model discloses, after letting in the direct current for each first forward current wire 2211 and each second reverse current wire 2221, electric motor rotor 100 will rotate around the axis of rotation according to the predetermined direction under the effect of the reaction force of first ampere of power and the reaction force of second ampere of power, the reaction force of first ampere of power and the reaction force of second ampere of power make electric motor rotor 100 pivoted torque promptly, thereby realized the conversion of electric energy and mechanical energy, also be promptly to convert the direct current into rotatory kinetic energy, the current flow direction in each first forward current wire 2211 and each second reverse current wire 2221 is fixed all the time in this process, need not carry out the current transformation, therefore, the utility model discloses a direct current motor can directly produce the torque through the direct current.

In addition, because the magnetic field direction of the motor magnetic field is not changed, in a specific using process, the relative position between the motor stator 200 and the motor rotor 100 does not need to be known, and the current introduced into the stator winding 220 is direct current, which is beneficial to simplifying the power supply control of the direct current motor.

In this embodiment, it is preferable that the magnetic field strength of the motor magnetic field is stable, so that the reaction force of the first ampere force and the reaction force of the second ampere force applied to the motor rotor 100 during a specific use process are also stable, and thus, it is beneficial to ensure the stability of the rotation speed of the motor rotor 100.

It should be noted that the direction of the magnetic field of the motor magnetic field is not changed during the rotation of the motor rotor 100 around the rotation axis, which means that during the rotation of the motor rotor 100 around the rotation axis, if the direction of the magnetic field in the first stator core 211 is radially outward, the direction of the magnetic field in the first stator core 211 is always radially outward, correspondingly, the direction of the magnetic field in the second stator core 212 is always radially inward, and if the direction of the magnetic field in the first stator core 211 is radially inward, the direction of the magnetic field in the first stator core 211 is always radially inward, correspondingly, the direction of the magnetic field in the second stator core 212 is always radially outward.

In order to increase the torque, the occupied area of each first forward current lead 2211 on the inner cylinder wall of the first stator core 211 and the occupied area of each second reverse current lead 2221 on the inner cylinder wall of the second stator core 212 may be increased, which requires increasing the number of first forward current leads 2211 and second reverse current leads 2221, and at the same time, in order to reduce the manufacturing difficulty, in this embodiment, the first forward current lead 2211 and the second reverse current lead 2221 are flat, so that the number of first forward current leads 2211 and second reverse current leads 2221 is increased, which may increase the occupied area of each first forward current lead 2211 on the inner cylinder wall of the first stator core 211 and the occupied area of each second reverse current lead 2221 on the inner cylinder wall of the second stator core 212; specifically, in the present embodiment, N is 24, and M is 24.

It should be noted that, each of the first forward current leads 2211 may be connected in parallel, for example, one end of each of the first forward current leads 2211 is electrically connected to a first electrical connection ring, the other end of each of the first forward current leads 2211 is electrically connected to another first electrical connection ring, each of the first forward current leads 2211 may also be connected in series, which is beneficial to ensure that the current of each of the first forward current leads 2211 is consistent with the current of the other of the first forward current leads 2211, and in this embodiment, each of the first forward current leads 2211 is preferably connected in series; likewise, the second reverse current conductors 2221 may be connected in parallel, for example, one end of each second reverse current conductor 2221 is electrically connected to a second electrical connection ring, the other end of each second reverse current conductor 2221 is electrically connected to another second electrical connection ring, and the second reverse current conductors 2221 may also be connected in series, which is beneficial to ensure that the currents of the second reverse current conductors 2221 are consistent with each other, and in this embodiment, the second reverse current conductors 2221 are preferably connected in series.

Further, please refer to fig. 2 to 4, in the embodiment of the present invention, the first stator winding 221 further includes N first reverse current conducting wires 2212, the second stator winding 222 further includes M second forward current conducting wires 2222, the first stator core 211 can limit the magnetic field of the motor to pass through each first reverse current conducting wire 2212, so as to limit the normal rotation of the motor rotor 100 interfered by the ampere force received by each first reverse current conducting wire 2212, the second stator core 212 can limit the magnetic field of the motor to pass through each second forward current conducting wire 2222, so as to limit the normal rotation of the motor rotor 100 interfered by the ampere force received by each second forward current conducting wire 2222; in other embodiments, the first reverse current conductor 2212 may be N-1 and the second forward current conductor 2222 may be M-1.

Two adjacent first forward current leads 2211 are connected in series through a first reverse current lead 2212, one end of one first forward current lead 2211 is electrically connected with the positive electrical structural member for current inflow, and one end of one first forward current lead 2211 is electrically connected with the negative electrical structural member through one first reverse current lead 2212 for current outflow; in one embodiment, where the number of the first reverse current leads 2212 is N-1, one end of a first forward current lead 2211 is used to electrically connect to the negative electrical structure for current to flow out.

Two adjacent second reverse current conducting wires 2221 are connected in series through a second forward current conducting wire 2222, wherein one end of one second reverse current conducting wire 2221 is used for being electrically connected with the positive electrode electrical structural member so as to supply current to flow in, and one end of one second reverse current conducting wire 2221 is electrically connected with the negative electrode electrical structural member through the second forward current conducting wire 2222 so as to supply current to flow out; in other embodiments, where the second forward current lead 2222 is M-1, there is also a second reverse current lead 2221 having one end electrically connected to the negative electrical structure for current to flow out.

In this way, the first stator winding 221 may be implemented by winding one end of one wire, which simplifies the structure of the first stator winding 221, and the second stator winding 222 may be implemented by winding one end of one wire, which simplifies the structure of the second stator winding 222.

Referring to fig. 3 to 8, in the embodiment of the present invention, N first stator inner grooves 21101 extending in the rotation axis direction are formed in the inner cylinder wall of the first stator core 211, each first forward current conducting wire 2211 is respectively laid in one first stator inner groove 21101, a plurality of first stator outer grooves 21102 extending in the rotation axis direction are formed in the outer cylinder wall of the first stator core 211, and each first reverse current conducting wire 2212 is respectively laid in one first stator outer groove 21102. Based on this, firstly, the wires wound to form the first stator winding 221 may be formed by winding the inner and outer cylindrical walls of the first stator core 211, secondly, each of the first stator inner slots 21101 restricts one first forward current wire 2211 from moving circumferentially, and each of the first stator outer slots 21102 restricts one first reverse current wire 2212 from moving circumferentially, thereby preventing the wires wound to form the first stator winding 221 from loosening on the first stator core 211.

The inner cylindrical wall of the second stator core 212 is provided with M second stator inner grooves 21201 extending in the direction of the rotation axis, each second reverse current conducting wire 2221 is laid in one second stator inner groove 21201, the outer cylindrical wall of the second stator core 212 is provided with a plurality of second stator outer grooves 2120 02 extending in the direction of the rotation axis, and each second forward current conducting wire 2222 is laid in one second stator outer groove 2120. Based on this, firstly, the wires wound to form the second stator winding 222 may be formed by winding the inner and outer cylindrical walls of the second stator core 212, secondly, each second stator inner slot 21201 restricts circumferential movement of one second reverse current wire 2221, and each second stator outer slot 212002 restricts circumferential movement of one second forward current wire 2222, thereby preventing the wires wound to form the second stator winding 222 from loosening on the second stator core 212.

Here, in fig. 2, 7 and 8, reference numerals correspond to each other, that is, the first forward current lead 2211 having reference numeral 1 is laid in the first intra-stator groove 21101 having reference numeral 1, and the rest are analogized in this order.

Referring to fig. 9, in the embodiment of the present invention, the motor rotor 100 includes a first permanent magnet assembly 111 and a second permanent magnet assembly 112, the first permanent magnet assembly 111 is located in the inner cylindrical cavity of the first stator core 211 and includes a plurality of first permanent magnets 1111, the first permanent magnets 1111 are disposed in an annular array with the rotation axis as the central axis, the second permanent magnet assembly 112 is located in the inner cylindrical cavity of the second stator core 212 and includes a plurality of second permanent magnets 1121, and the second permanent magnets 1121 are disposed in an annular array with the rotation axis as the central axis. Based on this, it is advantageous to secure the magnetic field strength passing through each first forward current lead 2211, and to secure the magnetic field strength passing through each second reverse current lead 2221.

If the direction of the magnetic field generated by the first permanent magnet 1111 is radially outward, the direction of the magnetic field generated by the second permanent magnet 1121 is radially inward, and if the direction of the magnetic field generated by the first permanent magnet 1111 is radially inward, the direction of the magnetic field generated by the second permanent magnet 1121 is radially outward.

Referring to fig. 10, in the embodiment of the present invention, the dc motor further includes a magnetic adjustment winding 400, and the magnetic adjustment winding 400 includes at least one magnetic adjustment coil 410 that is sleeved on the motor rotor 100 and is located between the first stator core 211 and the second stator core 212. Based on this, through the current size and the direction of controlling accent magnetism winding 400, can realize increasing magnetism or the weak magnetism to the motor magnetic field to enlarge direct current motor's rotational speed range, and simple structure.

Referring to fig. 5 and 6, in the embodiment of the present invention, the stator core 210 further includes a connection core 213 located between the first stator core 211 and the second stator core 212 and used for connecting the first stator core 211 and the second stator core 212, wherein the connection core 213, the first stator core 211, and the second stator core 212 may be an integral structure, and the connection core 213, the first stator core 211, and the second stator core 212 may be a split structure, and are assembled together in a specific using process. As such, firstly, the connection core 213 can play a role of magnetic conduction between the first stator core 211 and the second stator core 212, and secondly, the connection core 213 can omit the assembly between the first stator core 211 and the second stator core 212, improving the assembly efficiency.

Example two

Referring to fig. 11, a difference between the first embodiment and the second embodiment is that the motor rotor 100 further includes a first rotor core 121 and a second rotor core 122 both connected to the rotating shaft 300 and disposed at an interval on the rotating axis, the first rotor core 121 is provided with a plurality of first through holes in the rotating axis direction, the first rotor core 121 is formed with a first magnetic separation bridge between any two adjacent first through holes, each first through hole accommodates one first permanent magnet 1111, the second rotor core 122 is provided with a plurality of second through holes in the rotating axis direction, each second through hole accommodates one second permanent magnet 1121, and the second rotor core 122 is formed with a second magnetic separation bridge between any two adjacent second through holes. Therefore, the first permanent magnet 1111 and the second permanent magnet 1121 can be effectively prevented from loosening, and the magnetic flux leakage of the first permanent magnet 1111 and the second permanent magnet 1121 can be reduced.

EXAMPLE III

Referring to fig. 12 and 13, the difference between the first embodiment and the second embodiment is that the motor rotor 100 includes two rotor cores 123, one rotor core 123 is located in the first stator core 211, and the other rotor core 123 is located in the second stator core 212; the dc motor further includes a field winding 700 disposed between the two rotor cores 123, the field winding 700 enabling the two rotor cores 123 to form a motor magnetic field. Therefore, compared with the embodiment, the permanent magnet is removed, the rotating speed adjusting range of the direct current motor can be enlarged, the temperature resistance of the direct current motor is stronger, the manufacturing process of the direct current motor is further simplified, and the production and manufacturing cost is reduced.

The excitation winding 700 has the same or similar structural shape as the field control winding 400 according to the first embodiment.

Example four

Referring to fig. 14, the difference between the first embodiment and the second embodiment is that the motor rotor 100 includes a permanent magnet ring 110 that is sleeved on the rotating shaft 300 and is axially magnetized, so that the motor rotor 100 is simplified and the manufacturing is facilitated.

Wherein, the permanent magnet ring 110 is a permanent magnet ring 110 with an integral structure.

Referring to fig. 14 and 15, in the embodiment of the present invention, the motor rotor 100 further includes a magnetic isolation cylinder 130, the magnetic isolation cylinder 130 is used for isolating the magnetic field from passing through the rotating shaft 300, and the two rotor cores 123 are connected to the magnetic isolation cylinder 130.

EXAMPLE five

Referring to fig. 16, the difference between the present embodiment and the fourth embodiment is that the permanent magnet ring 110 is formed by splicing a plurality of permanent magnets 1101, which is beneficial to simplifying the motor rotor 110 and facilitating the production and manufacturing.

EXAMPLE six

Referring to fig. 17, the present embodiment is different from the third embodiment in that a pair of first forward current lead 2211 and a pair of first reverse current lead 2212 electrically connected to each other are electrically connected through a second stator winding 222. As such, the current levels of the first forward current lead 2211 and the second reverse current lead 2221 may be made uniform.

Referring to fig. 18 to 22, in the embodiment of the present invention, the inner cylinder wall of the first stator core 211 is provided with N first stator teeth 2111 extending in the rotation axis direction, each first stator tooth 2111 is circumferentially spaced along the inner cylinder wall of the first stator core 211, the top end surface of the first stator tooth 2111 is provided with a first tooth top slot 21104 extending in the rotation axis direction, a first stator slot 21103 is formed between any two adjacent first stator teeth 2111, each first forward current wire 2211 is respectively laid in one first tooth top slot 21104, and each first reverse current wire 2212 is respectively laid in one first stator slot 21103.

In the embodiment of the present invention, the inner cylinder wall of the second stator core 212 is provided with M second stator racks 2121 extending in the rotation axis direction, each second stator rack 2121 is circumferentially arranged along the inner cylinder wall of the second stator core 212 at intervals, the top end surface of the second stator rack 2121 is provided with a second vertex slot 21204 extending in the rotation axis direction, a second stator slot 21203 is formed between any two adjacent second stator racks 2121, each second reverse current conducting wire 2221 is respectively laid in one second vertex slot 21204, and each second forward current conducting wire 2222 is respectively laid in one second stator slot 21203.

In the present embodiment, N is 18, and M is 18.

EXAMPLE seven

Referring to fig. 23 and fig. 24, the present embodiment is different from the sixth embodiment in that each of the second forward current conducting wires 2222 is electrically connected to one of the first forward current conducting wires 2211; each of the first reverse current lead 2212 is electrically connected to one of the second reverse current lead 2221, respectively. As such, the current levels of the first forward current lead 2211 and the second reverse current lead 2221 may be made uniform.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.

Claims

1. A direct current motor, comprising:

2. The direct current motor of claim 1, wherein said first stator winding further comprises N-1 or N first reverse current conductors, said second stator winding further comprises M-1 or M second forward current conductors, said first stator core is capable of restricting said motor magnetic field from passing through each of said first reverse current conductors, said second stator core is capable of restricting said motor magnetic field from passing through each of said second forward current conductors;

two adjacent first forward current leads are connected in series through one first reverse current lead, one end of one first forward current lead is electrically connected with a positive electrode electrical structural member to supply current to flow in, when the number of the first reverse current leads is N-1, one end of the other first forward current lead is used for being electrically connected with a negative electrode electrical structural member to supply current to flow out, and when the number of the first reverse current leads is N, one end of the other first forward current lead is electrically connected with the negative electrode electrical structural member through the other first reverse current lead to supply current to flow out;

two adjacent second reverse current wires are connected in series through one second forward current wire, wherein one second reverse current wire one end is used for being connected with anodal electrical structure electricity to supply current to flow in when second forward current wire is M-1, still one second reverse current wire one end is used for being connected with negative pole electrical structure electricity, flows out with the supply current, and when second forward current wire is M, then still one second reverse current wire one end is passed through second forward current wire is connected with negative pole electrical structure electricity, flows out with the supply current.

3. The direct current motor according to claim 2, wherein a pair of the first forward current lead and the first reverse current lead electrically connected to each other are electrically connected through the second stator winding;

or, each second forward current lead is electrically connected to one first forward current lead, and each first reverse current lead is electrically connected to one second reverse current lead.

4. The direct current motor according to claim 2 or 3, wherein the inner cylindrical wall of the first stator core is provided with N first stator racks extending in the direction of the rotation axis, each first stator rack is circumferentially arranged along the inner cylindrical wall of the first stator core at intervals, a top end surface of each first stator rack is provided with a first tooth top groove extending in the direction of the rotation axis, a first stator groove is formed between any two adjacent first stator racks, each first forward current lead is respectively laid in one first tooth top groove, and each first reverse current lead is respectively laid in one first stator groove;

and/or M second stator racks extending in the direction of the rotation axis are arranged on the inner cylinder wall of the second stator core, each second stator rack is circumferentially arranged along the inner cylinder wall of the second stator core at intervals, a second tooth top groove extending in the direction of the rotation axis is formed in the top end face of each second stator rack, a second stator groove is formed between any two adjacent second stator racks, each second reverse current lead is respectively laid in one second tooth top groove, and each second forward current lead is respectively laid in one second stator groove.

5. The direct current motor according to claim 2 or 3, wherein the inner cylinder wall of the first stator core is provided with N first stator inner grooves extending in the direction of the rotation axis, each of the first forward current leads is laid in one of the first stator inner grooves, the outer cylinder wall of the first stator core is provided with a plurality of first stator outer grooves extending in the direction of the rotation axis, and each of the first reverse current leads is laid in one of the first stator outer grooves;

and/or M second stator inner grooves extending in the direction of the rotation axis are formed in the inner cylinder wall of the second stator core, each second reverse current lead is respectively laid in one second stator inner groove, a plurality of second stator outer grooves extending in the direction of the rotation axis are formed in the outer cylinder wall of the second stator core, and each second forward current lead is respectively laid in one second stator outer groove.

6. The dc electric machine of claim 1, wherein the machine rotor comprises two rotor cores, one of the rotor cores being located within the first stator core and the other of the rotor cores being located within the second stator core;

the direct current motor further comprises an excitation winding located between the two rotor cores, and the excitation winding can enable the two rotor cores to generate the motor magnetic field.

7. The dc electric machine of claim 1, wherein the machine rotor comprises a permanent magnet ring that is sleeved on the shaft and is axially magnetized, the permanent magnet ring being configured to generate a machine magnetic field.

8. The direct current motor according to claim 1, wherein the motor rotor includes a first permanent magnet assembly and a second permanent magnet assembly, the first permanent magnet assembly is located in the inner cylinder cavity of the first stator core and includes a plurality of first permanent magnets, the first permanent magnets are arranged in an annular array with the rotation axis as a central axis, the second permanent magnet assembly is located in the inner cylinder cavity of the second stator core and includes a plurality of second permanent magnets, and the second permanent magnets are arranged in an annular array with the rotation axis as a central axis.

9. The dc motor of claim 1, wherein the dc motor includes a field regulating winding, the field regulating winding including at least one turn of field regulating coil that is sleeved on the motor rotor and is located between the first stator core and the second stator core.

10. The direct current motor according to claim 1, wherein the stator core further comprises a connection core between the first stator core and the second stator core for connecting the first stator core and the second stator core.