Multiphase brush disc type reluctance motor

Abstract

The invention provides a multiphase brush disc type reluctance motor, which belongs to the field of motors and comprises a stator, a rotor and a rotating shaft, the stator and the rotor are of a single-disc or multi-disc structure, the stator is provided with multiphase symmetrical windings, and the windings of each phase are connected in series or in parallel; the rotor is provided with an even number of salient poles, the rotating shaft is provided with a plurality of slip rings, the outer rings of the slip rings are provided with conductive layers and insulating layers, and electric brushes and power supplies are arranged between the slip rings and each phase winding, so that a switching circuit is formed, and the conductive layers and the insulating layers are alternately contacted with the electric brushes during rotation to realize power-on and power-off of each phase winding. And the rotor continuously rotates under the action of electromagnetic attraction. The multiphase brush disc-type reluctance motor provided by the invention is sensorless, has the characteristics of easy control, high efficiency, high torque density and high reliability, and can be applied to power systems of electrically driven vehicles, industrial production and the like.

Description

Technical field:

[0001] The invention relates to the field of electric motors, in particular to a multi-phase brushed disc type reluctance motor. Background technology:

[0002] The disc motor, also known as the axial magnetic field motor, has a disc-type stator and rotor. Depending on the engineering application, the stator or rotor can be made into a single-disk or multi-disk structure. The disc motor can be made into a corresponding disc reluctance motor based on the principle that "the magnetic flux always closes along the path with the smallest magnetic resistance".

[0003] The existing disc reluctance motor is mainly composed of a motor body, a power converter, a controller, a position sensor, etc. The control system structure is complex and the R&D and manufacturing costs are high. Summary of the invention:

[0004] The present invention provides a multi-phase brushed disc type reluctance motor, which can effectively improve the above-mentioned problems.

[0005] The present invention is achieved in that:

[0006] A multi-phase brushed disc reluctance motor comprises a stator, a rotor and a rotating shaft, and also comprises a housing and a brush holder end cover. The stator and the rotor are both single-disc or multi-disc structures. The stator comprises three or more symmetrical windings, which are A phase, B phase, C phase, D phase..., the winding magnetic flux is an axial magnetic flux, and an iron core is arranged in each phase winding, and an iron yoke is arranged between the iron cores; the number of windings of each phase is an even number and is evenly distributed along the circumference of the stator, and the windings of each phase are connected in series or in parallel, and the polarity of the radially corresponding magnetic poles of each phase winding is different when power is supplied.

[0007] Furthermore, a bearing is provided between the housing and the rotating shaft, the rotor is connected to the rotating shaft, an even number of salient poles are provided on the rotor, and an air gap is provided between the rotor and the stator.

[0008] Furthermore, a plurality of slip rings are arranged on the rotating shaft, namely a first slip ring, a second slip ring, a third slip ring, a fourth slip ring, ..., the number of slip rings is consistent with the number of phases of the motor, and the structures of the slip rings are the same; the slip rings are connected to the rotating shaft, the slip rings rotate synchronously with the rotor, the outer ring of the slip ring is provided with a plurality of conductive layers and a plurality of insulating layers, the conductive layers are interconnected in the circuit, and the conductive layers and the insulating layers are evenly and alternately distributed; wherein the number of conductive layers = the number of insulating layers = the number of poles of the rotor.

[0009] Furthermore, the first slip ring is provided with a group A brush, the second slip ring is provided with a group B brush, the third slip ring is provided with a group C brush, and the fourth slip ring is provided with a group D brush; the group A brush, the group B brush, the group C brush, and the group D brush have the same structure, each consisting of two brushes, a brush holder is provided outside the brush, and the brush holder is installed in a brush holder end cover.

[0010] Furthermore, the A-phase winding end is connected to the A group of brushes, the B-phase winding end is connected to the B group of brushes, the C-phase winding end is connected to the C group of brushes, and the D-phase winding end is connected to the D group of brushes; the "connection" should be understood in a broad sense and cannot be understood as direct connection with wires. Power supplies, switching devices and other components are also provided between each phase winding and each group of brushes.

[0011] The energization or de-energization of each phase winding is achieved as follows: when the slip ring rotates until the conductive layer contacts the brush, the power supply and the winding form a closed loop so that the winding is energized; and when the slip ring rotates until the insulating layer contacts the brush, the winding is de-energized.

[0012] When this multi-phase brushed disc reluctance motor is working, according to the principle that the magnetic flux is always closed along the path with the smallest magnetic resistance, the rotor rotates due to the magnetic pull. During the rotation process:

[0013] The brushes of group A contact the conductive layer and insulating layer of the outer ring of the first slip ring alternately, thereby controlling the power on or off of the A-phase winding;

[0014] The B group of brushes alternately contact the conductive layer and insulating layer of the outer ring of the second slip ring, thereby controlling the power on or off of the B phase winding;

[0015] The C group of brushes alternately contacts the conductive layer and insulating layer of the outer ring of the third slip ring, thereby controlling the power on or off of the C phase winding;

[0016] The D group of brushes alternately contacts the conductive layer and the insulating layer of the outer ring of the fourth slip ring, thereby controlling the power on or off of the D phase winding;

[0017] Similarly, this operating mode is applicable to brushed disc reluctance motors with more phases. In summary, by continuously and sequentially conducting the stator windings of each phase, the rotor can continue to rotate under the electromagnetic pull.

[0018] The beneficial effects of a multi-phase brushless reluctance motor provided by the present invention are: this technical solution has no position sensor, has the characteristics of easy control, high efficiency, and high torque density, can be applied to electric vehicles, power systems of industrial production, etc., and has good reliability. Description of the drawings:

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the overall structure of a three-phase brushed disc reluctance motor provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the overall structure of a four-phase brushed disc reluctance motor provided by an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a multi-disc stator and a multi-disc rotor structure provided in an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of a stator structure provided in an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of a rotor structure provided by an embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the slip ring structure provided by an embodiment of the present invention:

[0026] Figure 7 , Figure 8 A schematic diagram of a three-phase stator structure provided in an embodiment of the present invention;

[0027] Fig. 9 A schematic diagram of the circuit structure of the A-phase winding in the three-phase stator provided by an embodiment of the present invention;

[0028] Fig.10 A schematic diagram of the circuit structure of the B-phase winding in the three-phase stator provided in an embodiment of the present invention;

[0029] Fig.11 A schematic diagram of the circuit structure of a C-phase winding in a three-phase stator provided in an embodiment of the present invention;

[0030] Fig.12 A schematic diagram of a four-phase stator structure provided in an embodiment of the present invention;

[0031] Fig.13 A schematic diagram of the circuit structure of the A-phase winding in the four-phase stator provided by an embodiment of the present invention;

[0032] Fig.14 A schematic diagram of the circuit structure of the B-phase winding in the four-phase stator provided in an embodiment of the present invention;

[0033] Fig.15 A schematic diagram of the circuit structure of a C-phase winding in a four-phase stator provided in an embodiment of the present invention;

[0034] Fig.16 A schematic diagram of the circuit structure of a D-phase winding in a four-phase stator provided in an embodiment of the present invention;

[0035] Fig.17 , Fig.18 , Fig.19 , Fig. 20 A schematic diagram of the working process of a three-phase brushed disc reluctance motor with a 6-pole stator and a 4-pole rotor provided in an embodiment of the present invention, in which the stator and the rotor are in an expanded structure;

[0036] Fig.21 , Fig. 22 , Fig.23 , Fig.24 A schematic diagram of the working process of a three-phase brushed disc reluctance motor with a 12-pole stator and an 8-pole rotor provided in an embodiment of the present invention, in which the stator and the rotor are in an expanded structure;

[0037] Fig.25 , Fig.26 , Fig. 27 , Fig.28 A schematic diagram of the working process of a four-phase brushed disc reluctance motor with an 8-pole stator and a 6-pole rotor provided in an embodiment of the present invention, in which the stator and the rotor are in an expanded structure;

[0038] The marks in the figure are:

[0039] stator 01; rotor 02; shaft 03; rotor salient pole 04; bearing 05; housing 06; brush holder end cover 07; air gap 08; iron core 09; iron yoke 10; brush group A 11; brush group B 12; brush group C 13; brush group D 14; brush holder 15; first slip ring 16; second slip ring 17; third slip ring 18; fourth slip ring 19; conductive layer 20; insulating layer 21; power supply 22;

[0040] A1, A2, A3, A4 are A-phase windings;

[0041] B1, B2, B3, B4 are B-phase windings;

[0042] C1, C2, C3, and C4 are C-phase windings;

[0043] D1 and D2 are D-phase windings. Specific implementation method:

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0045] Embodiment 1:

[0046] See also Figure 1 , Figure 2 , Figure 3 This embodiment provides a multi-phase brush disc type reluctance motor, which includes a stator 01, a rotor 02 and a rotating shaft 03, and also includes a housing 06 and a brush holder end cover 07. The stator 01 and the rotor 02 are both single-disc or multi-disc structures.

[0047] For further information, see Figure 4 , Figure 7 , Figure 8 , Fig.12 The stator 01 includes three or more symmetrical windings, namely phase A, phase B, phase C, phase D... The winding flux is axial flux, and each phase winding is provided with an iron core 09, and an iron yoke 10 is provided between the iron cores 09; the number of windings in each phase is an even number and is evenly distributed along the circumference of the stator 01, and each phase winding is connected in series or in parallel, and the polarity of the radially corresponding magnetic poles of each phase winding is different when power is applied. Preferably, in this embodiment, the number of phases of the motor is three-phase or four-phase, which is also the most commonly used number of phases for reluctance motors. Of course, the technical solution can also be expanded to other numbers of phases, such as five-phase, six-phase, etc.

[0048] Furthermore, a bearing 05 is provided between the housing 06 and the shaft 03, the rotor 02 is connected to the shaft 03, and an air gap 08 is provided between the rotor 02 and the stator 01, see Figure 5 , an even number of salient poles are provided on the rotor 02.

[0049] For further information, see Figure 6 , combined with Figure 1 and Figure 2, a plurality of slip rings are arranged on the rotating shaft 03, namely the first slip ring 16, the second slip ring 17, the third slip ring 18, the fourth slip ring 19..., the number of slip rings is consistent with the number of phases of the motor, and the structures of the slip rings are the same; the slip rings are connected to the rotating shaft 03, and the slip rings rotate synchronously with the rotor 02. The outer ring of each slip ring is provided with a plurality of conductive layers 20 and a plurality of insulating layers 21, and the conductive layers 20 are interconnected in the circuit, and the conductive layers 20 and the insulating layers 21 are evenly and alternately distributed; wherein, the number of conductive layers 20 = the number of insulating layers 21 = the number of poles of the rotor 02, so that: the conductive layer angular pitch = the insulating layer angular pitch = the rotor salient pole angular pitch.

[0050] Furthermore, a group A brush 11 is arranged on the first slip ring 16, a group B brush 12 is arranged on the second slip ring 17, a group C brush 13 is arranged on the third slip ring 18, and a group D brush 14 is arranged on the fourth slip ring 19; the group A brush 11, the group B brush 12, the group C brush 13, and the group D brush 14 have the same structure, each consisting of two brushes, a brush holder 15 is arranged outside the brush, and the brush holder 15 is installed in the brush holder end cover 07.

[0051] For further information, see Fig. 9 , Fig.10 , Fig.11 , Fig.13 , Fig.14 , Fig.15 , Fig.16 The end of the A-phase winding is connected to the A-group brush 11, the end of the B-phase winding is connected to the B-group brush 12, the end of the C-phase winding is connected to the C-group brush 13, and the end of the D-phase winding is connected to the D-group brush 14; the "connection" should be understood in a broad sense and cannot be understood as direct connection with wires. In actual use, power supplies 22, switching devices and other components are also provided between each phase winding and each group of brushes. The power supply 22 should be understood in a broad sense, referring to a device that provides electrical energy.

[0052] The energization or de-energization of each phase winding is achieved as follows: when the slip ring rotates until the conductive layer 20 contacts the brush, the power supply 22 and the winding form a closed loop so that the winding is energized; and when the slip ring rotates until the insulating layer 21 contacts the brush, the winding is de-energized.

[0053] When this multi-phase brushed disc reluctance motor is working, according to the principle that the magnetic flux always closes along the path with the smallest magnetic resistance, the rotor 02 rotates due to the magnetic pull. During the rotation process:

[0054] The brushes 11 of group A are in alternate contact with the conductive layer 20 and the insulating layer 21 of the outer ring of the first slip ring 16, thereby controlling the power on or off of the A-phase winding;

[0055] The B group of brushes 12 are in alternate contact with the conductive layer 20 and the insulating layer 21 of the outer ring of the second slip ring 17, thereby controlling the energization or de-energization of the B phase winding;

[0056] The C group of brushes 13 are in alternate contact with the conductive layer 20 and the insulating layer 21 of the outer ring of the third slip ring 18, thereby controlling the power on or off of the C phase winding;

[0057] The D-group brushes 14 are in alternate contact with the conductive layer 20 and the insulating layer 21 of the outer ring of the fourth slip ring 19, thereby controlling the power on or off of the D-phase winding;

[0058] Similarly, this operating mode is applicable to brushed disc reluctance motors with more phases. In summary, by continuously and sequentially conducting the stator windings of each phase, the rotor 02 can rotate continuously under the electromagnetic pull.

[0059] For further information, see Fig.17 , Fig.18 , Fig.19 , Fig. 20 , the stator and the rotor in the figure are both radially sectioned and expanded, and the arrow direction in the figure is the rotation direction. In order to more clearly illustrate the technical principle of the present technical solution, this embodiment 1 provides a working process of a three-phase brushed disc reluctance motor with a 6-pole stator and a 4-pole rotor:

[0060] At a certain moment, the three-phase brushless reluctance motor is powered on, and the motor operating status is as follows: Fig.17 As shown, at this time, the conductive layer 20 of the first slip ring 16 contacts the brush 11 of group A, and the A phase winding is in a powered state; the insulating layer 21 of the second slip ring 17 contacts the brush 12 of group B, and the B phase winding is in a powered-off state; the conductive layer 20 of the third slip ring 18 contacts the brush 13 of group C, and the C phase winding is in a powered-on state; according to the minimum magnetic resistance principle, the salient poles of the rotor 02 rotate due to the magnetic attraction of the A phase and C phase windings, and the slip rings rotate synchronously;

[0061] Further, when the rotor 02 and each slip ring rotate to Fig.18 In the state, the A-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the first slip ring 16 rotates until the insulating layer 21 contacts the A-group brush 11, and the A-phase winding is in a power-off state; the insulating layer 21 of the second slip ring 17 contacts the B-group brush 12, and the B-phase winding is in a power-off state; the conductive layer 20 of the third slip ring 18 contacts the C-group brush 13, and the C-phase winding is in a power-on state; according to the minimum magnetic resistance principle, the salient pole of the rotor 02 continues to rotate under the magnetic attraction of the C-phase winding, and the slip rings rotate synchronously;

[0062] Further, when the rotor 02 and each slip ring rotate to Fig.19In the state, the C-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the third slip ring 18 rotates until the insulating layer 21 contacts the C-group brush 13, and the C-phase winding is in a power-off state; the insulating layer 21 of the first slip ring 16 contacts the A-group brush 11, and the A-phase winding is in a power-off state; the conductive layer 20 of the second slip ring 17 contacts the B-group brush 12, and the B-phase winding is in a power-on state; according to the minimum magnetic resistance principle, the salient pole of the rotor 02 continues to rotate under the magnetic attraction of the B-phase winding, and the slip rings rotate synchronously;

[0063] Further, when the rotor 02 and each slip ring rotate to Fig. 20 In the state, the B-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the second slip ring 17 rotates until the insulating layer 21 contacts the B-group brush 12, and the B-phase winding is in a power-off state; the conductive layer 20 of the first slip ring 16 contacts the A-group brush 11, and the A-phase winding is in a power-on state; the insulating layer 21 of the third slip ring 18 contacts the C-group brush 13, and the C-phase winding is in a power-off state; according to the minimum magnetic resistance principle, the salient pole of the rotor 02 continues to rotate under the magnetic attraction of the A-phase winding, and the slip rings rotate synchronously;

[0064] To sum up, the stator windings of each phase are turned on continuously and sequentially, and the working process is repeated.

[0065] Embodiment 2:

[0066] This embodiment 2 provides a three-phase brushed disc reluctance motor with a 12-pole stator and an 8-pole rotor on the basis of embodiment 1. The stator of the motor is a three-phase 12-pole structure, the number of salient poles of the rotor is 8, and the number of conductive layers and insulating layers of the outer ring of the slip ring is 8; please refer to Figure 8 , the figure is a schematic diagram of the stator structure of the motor.

[0067] See also Fig.21 , Fig. 22 , Fig.23 , Fig.24 , the stator and the rotor in the figure are both radially sectioned and expanded, the arrow direction in the figure is the rotation direction, and this embodiment 2 provides a working process of a three-phase brushed disc reluctance motor with a 12-pole stator and an 8-pole rotor:

[0068] At a certain moment, the three-phase brushless reluctance motor is powered on, and the motor operating status is as follows: Fig.21 As shown, at this time, the conductive layer 20 of the first slip ring 16 contacts the brush 11 of group A, and the A phase winding is in a powered state; the insulating layer 21 of the second slip ring 17 contacts the brush 12 of group B, and the B phase winding is in a powered-off state; the conductive layer 20 of the third slip ring 18 contacts the brush 13 of group C, and the C phase winding is in a powered-on state; according to the minimum magnetic resistance principle, the salient poles of the rotor 02 rotate due to the magnetic attraction of the A phase and C phase windings, and the slip rings rotate synchronously;

[0069] Further, when the rotor 02 and each slip ring rotate to Fig. 22 In the state, the A-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the first slip ring 16 rotates until the insulating layer 21 contacts the A-group brush 11, and the A-phase winding is in a power-off state; the insulating layer 21 of the second slip ring 17 contacts the B-group brush 12, and the B-phase winding is in a power-off state; the conductive layer 20 of the third slip ring 18 contacts the C-group brush 13, and the C-phase winding is in a power-on state; according to the minimum magnetic resistance principle, the salient pole of the rotor 02 continues to rotate under the magnetic attraction of the C-phase winding, and the slip rings rotate synchronously;

[0070] Further, when the rotor 02 and each slip ring rotate to Fig.23 In the state, the C-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the third slip ring 18 rotates until the insulating layer 21 contacts the C-group brush 13, and the C-phase winding is in a power-off state; the insulating layer 21 of the first slip ring 16 contacts the A-group brush 11, and the A-phase winding is in a power-off state; the conductive layer 20 of the second slip ring 17 contacts the B-group brush 12, and the B-phase winding is in a power-on state; according to the minimum magnetic resistance principle, the salient pole of the rotor 02 continues to rotate under the magnetic attraction of the B-phase winding, and the slip rings rotate synchronously;

[0071] Further, when the rotor 02 and each slip ring rotate to Fig.24 In the state, the B-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the second slip ring 17 rotates until the insulating layer 21 contacts the B-group brush 12, and the B-phase winding is in a power-off state; the conductive layer 20 of the first slip ring 16 contacts the A-group brush 11, and the A-phase winding is in a power-on state; the insulating layer 21 of the third slip ring 18 contacts the C-group brush 13, and the C-phase winding is in a power-off state; according to the minimum magnetic resistance principle, the salient pole of the rotor 02 continues to rotate under the magnetic attraction of the A-phase winding, and the slip rings rotate synchronously;

[0072] To sum up, the stator windings of each phase are turned on continuously and sequentially, and the working process is repeated.

[0073] Embodiment 3:

[0074] This embodiment 3 provides a four-phase brushed disc reluctance motor based on the above embodiment. The stator of the motor is a four-phase 8-pole structure, the number of salient poles of the rotor is 6, and the number of conductive layers and insulating layers of the outer ring of the slip ring are both 6.

[0075] See also Fig.12 , the figure is a schematic diagram of the stator structure of a four-phase brushless reluctance motor.

[0076] See also Fig.25 , Fig.26 , Fig. 27 , Fig.28 , the stator and the rotor in the figure are both radially sectioned and expanded, the arrow direction in the figure is the rotation direction, and this embodiment 3 provides a working process of a four-phase brushed disc reluctance motor with an 8-pole stator and a 6-pole rotor:

[0077] At a certain moment, the four-phase brushless reluctance motor is powered on, and the motor operating status is as follows: Fig.25 As shown, at this time, the conductive layer 20 of the first slip ring 16 contacts the brush 11 of group A, and the A phase winding is in a powered state; the insulating layer 21 of the second slip ring 17 contacts the brush 12 of group B, and the B phase winding is in a powered-off state; the insulating layer 21 of the third slip ring 18 contacts the brush 13 of group C, and the C phase winding is in a powered-off state; the conductive layer 20 of the fourth slip ring 19 contacts the brush 14 of group D, and the D phase winding is in a powered-on state; according to the minimum magnetic resistance principle, the salient poles of the rotor 02 rotate due to the magnetic attraction of the A phase and D phase windings, and the slip rings rotate synchronously;

[0078] Further, when the rotor 02 and each slip ring rotate to Fig.26 In the state, the A-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the first slip ring 16 rotates until the insulating layer 21 contacts the A-group brush 11, and the A-phase winding is in a power-off state; the insulating layer 21 of the second slip ring 17 contacts the B-group brush 12, and the B-phase winding is in a power-off state; the insulating layer 21 of the third slip ring 18 contacts the C-group brush 13, and the C-phase winding is in a power-off state; the conductive layer 20 of the fourth slip ring 19 contacts the D-group brush 14, and the D-phase winding is in a power-on state; according to the minimum magnetic resistance principle, the salient pole of the rotor 02 continues to rotate under the magnetic attraction of the D-phase winding, and the slip rings rotate synchronously;

[0079] Further, when the rotor 02 and each slip ring rotate to Fig. 27 In the state, the D-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the fourth slip ring 19 rotates until the insulating layer 21 contacts the D-group brush 14, and the D-phase winding is in a power-off state; the insulating layer 21 of the first slip ring 16 contacts the A-group brush 11, and the A-phase winding is in a power-off state; the insulating layer 21 of the second slip ring 17 contacts the B-group brush 12, and the B-phase winding is in a power-off state; the conductive layer 20 of the third slip ring 18 contacts the C-group brush 13, and the C-phase winding is in a power-on state; according to the minimum magnetic resistance principle, the salient pole of the rotor 02 continues to rotate under the magnetic attraction of the C-phase winding, and the slip rings rotate synchronously;

[0080] Further, when the rotor 02 and each slip ring rotate to Fig.28In the state, the C-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the third slip ring 18 rotates until the insulating layer 21 contacts the C-group brush 13, and the C-phase winding is in a power-off state; the insulating layer 21 of the first slip ring 16 contacts the A-group brush 11, and the A-phase winding is in a power-off state; the conductive layer 20 of the second slip ring 17 contacts the B-group brush 12, and the B-phase winding is in a power-on state; the insulating layer 21 of the fourth slip ring 19 contacts the D-group brush 14, and the D-phase winding is in a power-off state; according to the minimum magnetic resistance principle, the salient pole of the rotor 02 continues to rotate under the magnetic attraction of the B-phase winding, and the slip rings rotate synchronously;

[0081] To sum up, the stator windings of each phase are turned on continuously and sequentially, and the working process is repeated.

[0082] The above-mentioned embodiments are only preferred embodiments of the present invention and are not intended to limit the present invention. In practical applications, the number of phases of the multi-phase brushed disc reluctance motor can be set according to engineering applications, and the stator and rotor can be reasonably matched with other numbers of poles. For those skilled in the art, the present invention can have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

[0083] In the description of the present invention, it is necessary to understand that:

[0084] The number of components in the drawings does not indicate or imply that the device must have this number. In actual use, the number of components may also be other numbers, so it should not be understood as a limitation of the present invention. "Multiple" and "plurality" mean two or more, unless otherwise clearly defined.

[0085] The orientation or positional relationship indicated by terms such as "upper", "lower", "front", "back", "inside", and "outside" are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0086] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only, and the terms "A", "B", "C" and "D" are also used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0087] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A multi-phase brushed disc reluctance motor, characterized in that: The multi-phase brushed disc reluctance motor includes a stator, a rotor and a rotating shaft, and also includes a housing and a brush holder end cover. The stator and the rotor are both single-disc or multi-disc structures. The stator includes three-phase or more symmetrical windings, which are A phase, B phase, C phase, D phase..., and the winding magnetic flux is an axial magnetic flux. An iron core is arranged in each phase winding, and an iron yoke is arranged between the iron cores. The number of windings in each phase is an even number and is evenly distributed along the circumference of the stator. The windings of each phase are connected in series or in parallel, and the polarity of the magnetic poles corresponding to the radial direction of each phase winding is different when power is supplied to the winding. A bearing is provided between the housing and the rotating shaft, the rotor is connected to the rotating shaft, an even number of salient poles are provided on the rotor, and an air gap is provided between the rotor and the stator; The rotating shaft is provided with a plurality of slip rings, namely a first slip ring, a second slip ring, a third slip ring, a fourth slip ring, ..., the number of the slip rings is consistent with the number of phases of the motor, and the structures of the slip rings are the same; the slip rings are connected to the rotating shaft, the rotation speed of the slip rings is synchronized with that of the rotor, the outer ring of the slip ring is provided with a plurality of conductive layers and a plurality of insulating layers, the conductive layers are interconnected in a circuit, and the conductive layers and the insulating layers are evenly and alternately distributed; wherein the number of the conductive layers=the number of the insulating layers=the number of poles of the rotor.

2. The multi-phase brushed disc reluctance motor according to claim 1, characterized in that: The first slip ring is provided with a group A brush, the second slip ring is provided with a group B brush, the third slip ring is provided with a group C brush, and the fourth slip ring is provided with a group D brush; the group A brush, the group B brush, the group C brush, and the group D brush have the same structure, each consisting of two brushes, a brush holder is provided outside the brush, and the brush holder is installed in the brush holder end cover.

3. The multi-phase brushed disc reluctance motor according to claim 1 or claim 2, characterized in that: The A-phase winding end is connected to the A-group brush, the B-phase winding end is connected to the B-group brush, the C-phase winding end is connected to the C-group brush, and the D-phase winding end is connected to the D-group brush; a power supply is provided between each phase winding and each group of brushes.

4. The multi-phase brushed disc reluctance motor according to any one of claims 1 to 3, characterized in that: During the operation of the motor: when the first slip ring rotates until the conductive layer contacts the A-group brush, the power supply and the A-phase winding form a closed loop so that the A-phase winding is energized; and when the first slip ring rotates until the insulating layer contacts the A-group brush, the A-phase winding is de-energized; When the second slip ring rotates until the conductive layer contacts the B-group brush, the power supply and the B-phase winding form a closed loop so that the B-phase winding is energized; and when the second slip ring rotates until the insulating layer contacts the B-group brush, the B-phase winding is de-energized. When the third slip ring rotates until the conductive layer contacts the C-group brush, the power supply and the C-phase winding form a closed loop so that the C-phase winding is energized; and when the third slip ring rotates until the insulating layer contacts the C-group brush, the C-phase winding is de-energized. When the fourth slip ring rotates until the conductive layer contacts the D-group brush, the power supply and the D-phase winding form a closed loop so that the D-phase winding is energized; and when the fourth slip ring rotates until the insulating layer contacts the D-group brush, the D-phase winding is de-energized.

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