Four-phase brush reluctance motor

Abstract

The invention provides a four-phase brush reluctance motor, and belongs to the field of reluctance motors, the four-phase brush reluctance motor comprises a stator, a rotor and a rotating shaft, the stator is provided with four-phase symmetrical windings, the number of the windings of each phase is even, the windings of each phase are uniformly distributed along the circumferential direction of the stator, the windings of each phase are connected in series or in parallel, and the polarities of radially opposite magnetic poles of the windings of each phase are different during electrification; the rotor is provided with an even number of salient poles, the rotating shaft is provided with four slip rings, each slip ring is provided with a conductive layer and an insulating layer, a brush carrier assembly and a power supply are arranged between each slip ring and each phase winding, and the conductive layers and the insulating layers alternately contact with electric brushes of the brush carrier assemblies during rotation to realize power-on or power-off of each phase winding. And the rotor continuously moves under the magnetic attraction force. The four-phase brush reluctance motor sensorless provided by the invention has the characteristics of simple control, high efficiency and high reliability, and can be applied to power systems, new energy automobiles and the like in industrial production.

Description

Technical field:

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

[0002] Reluctance motors are different from other motors. Reluctance motors follow the principle that magnetic flux always closes along the path with the smallest magnetic resistance, and the rotor generates electromagnetic torque with magnetic resistance due to magnetic pull. The existing switched reluctance motors are mainly composed of the motor body, power converter, controller, position sensor, etc. The control system structure is complex and the R&D and manufacturing costs are high.

[0003] Reluctance motors can be designed with different phase structures, and the most commonly used ones are three-phase and four-phase structures. Generally speaking, the four-phase structure is conducive to reducing torque pulsation. Patent No. 2024111314129 provides a three-phase brushed reluctance motor. The technical solution is a three-phase structure. For occasions where the torque pulsation requirement is small, this technical solution is obviously difficult to apply. Summary of the invention:

[0004] The present invention provides a four-phase brushed reluctance motor which can effectively solve the above problems.

[0005] The present invention is achieved in that:

[0006] A four-phase brushed reluctance motor comprises a stator, a rotor and a rotating shaft. The stator comprises four symmetrical windings, namely phase A, phase B, phase C and phase D. An iron core is arranged inside the 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 radially opposite magnetic poles of each phase winding is different when power is supplied.

[0007] Furthermore, 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, four slip rings are arranged on the rotating shaft, namely a first slip ring, a second slip ring, a third slip ring, and a fourth slip ring, the slip rings are connected to the rotating shaft, and the slip rings rotate synchronously with the rotor; each of the slip rings is arranged with a plurality of conductive layers and a plurality of insulating layers, the conductive layers and the insulating layers are evenly and alternately distributed, and the number of the conductive layers = the number of the insulating layers = the number of poles of the rotor.

[0009] Furthermore, the four-phase brushed reluctance motor also includes a casing and a brush holder end cover, and a bearing is provided between the casing and the rotating shaft.

[0010] Furthermore, a power supply and a first brush holder assembly are provided between the A-phase winding and the first slip ring; a power supply and a second brush holder assembly are provided between the B-phase winding and the second slip ring; a power supply and a third brush holder assembly are provided between the C-phase winding and the third slip ring; and a power supply and a fourth brush holder assembly are provided between the D-phase winding and the fourth slip ring.

[0011] Furthermore, the first brush holder assembly, the second brush holder assembly, the third brush holder assembly, and the fourth brush holder assembly have the same structure, each of the brush holder assemblies includes two brushes and a brush holder, the brush is installed in the brush holder, the brush holder is installed in the brush holder end cover, and the two brushes are in contact with the slip ring.

[0012] One of the brushes of the brush holder assembly is connected to the winding, the other brush is connected to the power supply, and the power supply is connected to the winding. When the slip ring rotates until the conductive layer contacts the two brushes of the brush holder assembly, the power supply and the winding form a closed loop so that the winding is energized.

[0013] When this four-phase brushed reluctance motor is working, according to the principle of minimum reluctance, the rotor rotates due to the magnetic pull. During the rotation process:

[0014] The brushes of the first brush holder assembly are in alternate contact with the conductive layer and the insulating layer of the first slip ring, thereby controlling the power on or off of the A-phase winding;

[0015] The brushes of the second brush holder assembly are in alternate contact with the conductive layer and the insulating layer of the second slip ring, thereby controlling the energization or de-energization of the B-phase winding;

[0016] The brushes of the third brush holder assembly are in alternate contact with the conductive layer and the insulating layer of the third slip ring, thereby controlling the power on or off of the C-phase winding;

[0017] The brushes of the fourth brush holder assembly are in alternate contact with the conductive layer and the insulating layer of the fourth slip ring, thereby controlling the energization or de-energization of the D-phase winding;

[0018] To sum up, by continuously and sequentially conducting the stator windings of each phase, the rotor can rotate continuously.

[0019] The beneficial effects of a four-phase brushed reluctance motor provided by the present invention are: this technical solution has no position sensor, has the characteristics of simple control, high efficiency and high reliability, and compared with a three-phase reluctance motor, has smaller torque pulsation, and can be applied to power systems of industrial production, new energy vehicles, etc. Description of the drawings:

[0020] 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.

[0021] Figure 1 A schematic diagram of the overall structure of a four-phase brushed reluctance motor provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the stator and rotor structure of a four-phase brushed reluctance motor provided in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the structure of a slip ring and a brush holder assembly of a four-phase brushed reluctance motor provided by an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of an A-phase winding circuit of a four-phase brushed reluctance motor provided by an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of a B-phase winding circuit of a four-phase brushed reluctance motor provided by an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of a C-phase winding circuit of a four-phase brushed reluctance motor provided by an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of a D-phase winding circuit of a four-phase brushed reluctance motor provided by an embodiment of the present invention;

[0028] Figure 8 , Fig. 9 , Fig.10 , Fig.11 A schematic diagram of the working process of an 8-pole stator and a 6-pole rotor of a four-phase brushed reluctance motor provided by an embodiment of the present invention;

[0029] Fig.12 , Fig.13 , Fig.14 , Fig.15 A schematic diagram of the working process of a 16-pole stator and a 12-pole rotor of a four-phase brushed reluctance motor provided by an embodiment of the present invention;

[0030] Fig.16 , Fig.17 , Fig.18 , Fig.19 A schematic diagram of the working process of a 24-pole stator and an 18-pole rotor of a four-phase brushed reluctance motor provided in an embodiment of the present invention.

[0031] The marks in the figure are:

[0032] stator 01; rotor 02; shaft 03; bearing 04; housing 05; brush holder end cover 06; air gap 07; iron core 08; iron yoke 09; first slip ring 10; second slip ring 11; third slip ring 12; fourth slip ring 13; first brush holder assembly 14; second brush holder assembly 15; third brush holder assembly 16; fourth brush holder assembly 17; brush 18; brush holder 19; conductive layer 20; insulating layer 21; power supply 22;

[0033] A1, A2, A3, A4, A5, A6 are A-phase windings;

[0034] B1, B2, B3, B4, B5, B6 are B-phase windings;

[0035] C1, C2, C3, C4, C5, and C6 are C-phase windings;

[0036] D1, D2, D3, D4, D5, and D6 are D-phase windings. Specific implementation method:

[0037] 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.

[0038] Embodiment 1:

[0039] See also Figure 1 and Figure 2 This embodiment 1 provides a four-phase brushed reluctance motor, including a stator 01, a rotor 02, and a rotating shaft 03. The stator 01 includes four symmetrical windings, namely phase A, phase B, phase C, and phase D. An iron core 08 is arranged in the winding, and an iron yoke 09 is arranged between the iron cores 08; the number of windings in each phase is an even number and is evenly distributed along the circumference of the stator 01. The windings of each phase are connected in series or in parallel, and the polarity of the radially opposite magnetic poles of each phase winding is different when power is supplied.

[0040] Furthermore, the rotor 02 is connected to the rotating shaft 03 , an even number of salient poles are provided on the rotor 02 , and an air gap 07 is provided between the rotor 02 and the stator 01 .

[0041] For further information, see Figure 1 and Figure 3 , four slip rings are arranged on the rotating shaft 03, namely the first slip ring 10, the second slip ring 11, the third slip ring 12, and the fourth slip ring 13, each of which is connected to the rotating shaft 03 and rotates synchronously with the rotor 02; each slip ring is arranged with a plurality of conductive layers 20 and a plurality of insulating layers 21, and the conductive layers 20 and the insulating layers 21 are evenly and alternately distributed. Among them, for each slip ring, the number of conductive layers 20 = the number of insulating layers 21 = the number of poles of the rotor 02.

[0042] Furthermore, the four-phase brushed reluctance motor also includes a housing 05 and a brush holder end cover 06 , and a bearing 04 is provided between the housing 05 and the rotating shaft 03 .

[0043] For further information, see Figure 4 , Figure 5 , Figure 6 , Figure 7 The figure describes the circuit structure of each phase winding. A power supply 22 and a first brush holder assembly 14 are arranged between the A phase winding and the first slip ring 10; a power supply 22 and a second brush holder assembly 15 are arranged between the B phase winding and the second slip ring 11; a power supply 22 and a third brush holder assembly 16 are arranged between the C phase winding and the third slip ring 12; a power supply 22 and a fourth brush holder assembly 17 are arranged between the D phase winding and the fourth slip ring 13.

[0044] Furthermore, the first brush holder assembly 14, the second brush holder assembly 15, the third brush holder assembly 16, and the fourth brush holder assembly 17 have the same structure, and each brush holder assembly includes two brushes 18 and a brush holder 19. The brush 18 is installed in the brush holder 19, and the brush holder 19 is installed in the brush holder end cover 06. Both brushes 18 are in contact with the slip ring. One of the brushes 18 of the brush holder assembly is connected to the winding, and the other brush 18 is connected to the power supply 22, and the power supply 22 is connected to the winding. When the slip ring rotates until the conductive layer 20 contacts the two brushes 18 of the brush holder assembly, 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 two brushes 18 of the brush holder assembly, the power supply 22 and the winding are disconnected.

[0045] This four-phase brushed reluctance motor follows the principle of minimum reluctance when working, so that the rotor 02 rotates due to the magnetic pull. During the rotation process:

[0046] The brush 18 of the first brush holder assembly 14 is in alternate contact with the conductive layer 20 and the insulating layer 21 of the first slip ring 10, thereby controlling the power on or off of the A-phase winding;

[0047] The brush 18 of the second brush holder assembly 15 is in alternate contact with the conductive layer 20 and the insulating layer 21 of the second slip ring 11, thereby controlling the power on or off of the B-phase winding;

[0048] The brush 18 of the third brush holder assembly 16 is in alternate contact with the conductive layer 20 and the insulating layer 21 of the third slip ring 12, thereby controlling the power on or off of the C-phase winding;

[0049] The brush 18 of the fourth brush holder assembly 17 is in alternate contact with the conductive layer 20 and the insulating layer 21 of the fourth slip ring 13, thereby controlling the power on or off of the D-phase winding;

[0050] In summary, by continuously and sequentially conducting the windings of the stator 01 of each phase, the rotor 02 can rotate continuously.

[0051] For further information, see Figure 8 , Fig. 9 , Fig.10 , Fig.11 , the arrow direction in the figure is the rotation direction, and this embodiment 1 provides a working process of a four-phase brushed reluctance motor with an 8-pole stator and a 6-pole rotor:

[0052] At a certain moment, the four-phase brushed reluctance motor is powered on, and the motor status is as follows: Figure 8 As shown, at this time, the conductive layer 20 of the first slip ring 10 contacts the brush 18 of the first brush holder assembly 14, and the A phase winding is in a powered state; the insulating layer 21 of the second slip ring 11 contacts the brush 18 of the second brush holder assembly 15, and the B phase winding is in a powered-off state; the insulating layer 21 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C phase winding is in a powered-off state; the conductive layer 20 of the fourth slip ring 13 contacts the brush 18 of the fourth brush holder assembly 17, 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;

[0053] Further, when the rotor 02 and each slip ring rotate to Fig. 9 In the state, the D-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the fourth slip ring 13 rotates until the insulating layer 21 contacts the brush 18 of the fourth brush holder assembly 17, and the D-phase winding is in a power-off state; the conductive layer 20 of the first slip ring 10 contacts the brush 18 of the first brush holder assembly 14, and the A-phase winding is in a power-on state; the insulating layer 21 of the second slip ring 11 contacts the brush 18 of the second brush holder assembly 15, and the B-phase winding is in a power-off state; the insulating layer 21 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C-phase winding is in a power-off state; according to the principle of minimum magnetic resistance, 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;

[0054] Further, when the rotor 02 and each slip ring rotate to Fig.10 In the state, the A-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the first slip ring 10 rotates until the insulating layer 21 contacts the brush 18 of the first brush holder assembly 14, and the A-phase winding is in a power-off state; the conductive layer 20 of the second slip ring 11 contacts the brush 18 of the second brush holder assembly 15, and the B-phase winding is in a power-on state; the insulating layer 21 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C-phase winding is in a power-off state; the insulating layer 21 of the fourth slip ring 13 contacts the brush 18 of the fourth brush holder assembly 17, and the D-phase winding is in a power-off state; according to the principle of minimum magnetic resistance, 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;

[0055] Further, when the rotor 02 and each slip ring rotate to Fig.11 In the state, the B-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the second slip ring 11 rotates until the insulating layer 21 contacts the brush 18 of the second brush holder assembly 15, and the B-phase winding is in a power-off state; the insulating layer 21 of the first slip ring 10 contacts the brush 18 of the first brush holder assembly 14, and the A-phase winding is in a power-off state; the conductive layer 20 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C-phase winding is in a power-on state; the insulating layer 21 of the fourth slip ring 13 contacts the brush 18 of the fourth brush holder assembly 17, and the D-phase winding is in a power-off state; according to the principle of minimum magnetic resistance, 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;

[0056] To sum up, the stator windings of each phase are turned on continuously and sequentially, and the working process is repeated.

[0057] Embodiment 2:

[0058] This embodiment 2 provides a four-phase brushed reluctance motor with a 16-pole stator and a 12-pole rotor on the basis of embodiment 1. The stator 01 of the motor is a four-phase 16-pole structure, and the number of salient poles of the rotor 02 is 12.

[0059] See also Fig.12 , Fig.13 , Fig.14 , Fig.15 , this embodiment 2 provides a working process of a four-phase brushed reluctance motor with 16-pole stator and 12-pole rotor:

[0060] At a certain moment, the four-phase brushed reluctance motor is powered on, and the motor status is as follows: Fig.12As shown, at this time, the A-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the insulating layer 21 of the first slip ring 10 contacts the brush 18 of the first brush holder assembly 14, and the A-phase winding is in a power-off state; the conductive layer 20 of the second slip ring 11 contacts the brush 18 of the second brush holder assembly 15, and the B-phase winding is in a power-on state; the insulating layer 21 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C-phase winding is in a power-off state; the insulating layer 21 of the fourth slip ring 13 contacts the brush 18 of the fourth brush holder assembly 17, 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 rotates under the magnetic attraction of the B-phase winding, and the slip rings rotate synchronously;

[0061] Further, when the rotor 02 and each slip ring rotate to Fig.13 In the state, the B-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the second slip ring 11 rotates until the insulating layer 21 contacts the brush 18 of the second brush holder assembly 15, and the B-phase winding is in a power-off state; the insulating layer 21 of the first slip ring 10 contacts the brush 18 of the first brush holder assembly 14, and the A-phase winding is in a power-off state; the conductive layer 20 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C-phase winding is in a power-on state; the insulating layer 21 of the fourth slip ring 13 contacts the brush 18 of the fourth brush holder assembly 17, and the D-phase winding is in a power-off state; according to the principle of minimum magnetic resistance, 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.14 In the state, the C-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the third slip ring 12 rotates until the insulating layer 21 contacts the brush 18 of the third brush holder assembly 16, and the C-phase winding is in a power-off state; the insulating layer 21 of the first slip ring 10 contacts the brush 18 of the first brush holder assembly 14, and the A-phase winding is in a power-off state; the insulating layer 21 of the second slip ring 11 contacts the brush 18 of the second brush holder assembly 15, and the B-phase winding is in a power-off state; the conductive layer 20 of the fourth slip ring 13 contacts the brush 18 of the fourth brush holder assembly 17, and the D-phase winding is in a power-on state; according to the principle of minimum magnetic resistance, 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;

[0063] Further, when the rotor 02 and each slip ring rotate to Fig.15In the state, the D-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the fourth slip ring 13 rotates until the insulating layer 21 contacts the brush 18 of the fourth brush holder assembly 17, and the D-phase winding is in a power-off state; the conductive layer 20 of the first slip ring 10 contacts the brush 18 of the first brush holder assembly 14, and the A-phase winding is in a power-on state; the insulating layer 21 of the second slip ring 11 contacts the brush 18 of the second brush holder assembly 15, and the B-phase winding is in a power-off state; the insulating layer 21 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C-phase winding is in a power-off state; according to the principle of minimum magnetic resistance, 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 3:

[0066] This embodiment 3 provides a four-phase brushed reluctance motor with a 24-pole stator and an 18-pole rotor on the basis of embodiment 1. The stator 01 of the motor is a four-phase 24-pole structure, and the number of salient poles of the rotor 02 is 18.

[0067] See also Fig.16 , Fig.17 , Fig.18 , Fig.19 , this embodiment 3 provides a working process of a four-phase brushed reluctance motor with 24-pole stator and 18-pole rotor:

[0068] At a certain moment, the four-phase brushed reluctance motor is powered on, and the motor status is as follows: Fig.16 As shown, at this time, the insulating layer 21 of the first slip ring 10 contacts the brush 18 of the first brush holder assembly 14, and the A phase winding is in a power-off state; the insulating layer 21 of the second slip ring 11 contacts the brush 18 of the second brush holder assembly 15, and the B phase winding is in a power-off state; the insulating layer 21 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C phase winding is in a power-off state; the conductive layer 20 of the fourth slip ring 13 contacts the brush 18 of the fourth brush holder assembly 17, 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 is subjected to the magnetic attraction of the D phase winding and rotates, and each slip ring rotates synchronously;

[0069] Further, when the rotor 02 and each slip ring rotate to Fig.17In the state, the D-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the fourth slip ring 13 rotates until the insulating layer 21 contacts the brush 18 of the fourth brush holder assembly 17, and the D-phase winding is in a power-off state; the conductive layer 20 of the first slip ring 10 contacts the brush 18 of the first brush holder assembly 14, and the A-phase winding is in a power-on state; the insulating layer 21 of the second slip ring 11 contacts the brush 18 of the second brush holder assembly 15, and the B-phase winding is in a power-off state; the insulating layer 21 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C-phase winding is in a power-off state; according to the principle of minimum magnetic resistance, 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;

[0070] 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 10 rotates until the insulating layer 21 contacts the brush 18 of the first brush holder assembly 14, and the A-phase winding is in a power-off state; the conductive layer 20 of the second slip ring 11 contacts the brush 18 of the second brush holder assembly 15, and the B-phase winding is in a power-on state; the insulating layer 21 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C-phase winding is in a power-off state; the insulating layer 21 of the fourth slip ring 13 contacts the brush 18 of the fourth brush holder assembly 17, and the D-phase winding is in a power-off state; according to the principle of minimum magnetic resistance, 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.19 In the state, the B-phase winding coincides or nearly coincides with the salient pole of the rotor 02, the second slip ring 11 rotates until the insulating layer 21 contacts the brush 18 of the second brush holder assembly 15, and the B-phase winding is in a power-off state; the insulating layer 21 of the first slip ring 10 contacts the brush 18 of the first brush holder assembly 14, and the A-phase winding is in a power-off state; the conductive layer 20 of the third slip ring 12 contacts the brush 18 of the third brush holder assembly 16, and the C-phase winding is in a power-on state; the insulating layer 21 of the fourth slip ring 13 contacts the brush 18 of the fourth brush holder assembly 17, and the D-phase winding is in a power-off state; according to the principle of minimum magnetic resistance, 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;

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

[0073] 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 stator and rotor of the four-phase brushed reluctance motor can be reasonably matched with other pole numbers. 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.

[0074] In the description of the present invention, it is necessary to understand that:

[0075] 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.

[0076] 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.

[0077] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0078] 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 four-phase brushed reluctance motor, characterized in that: The four-phase brushed reluctance motor comprises a stator, a rotor, and a rotating shaft. The stator comprises four symmetrical windings, namely phase A, phase B, phase C, and phase D. An iron core is arranged inside the 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. The windings of each phase are connected in series or in parallel, and the polarity of the radially opposite magnetic poles of each phase winding is different when power is supplied. The rotor is connected to the rotating shaft, an even number of salient poles are arranged on the rotor, and an air gap is arranged between the rotor and the stator; The rotating shaft is provided with four slip rings, namely a first slip ring, a second slip ring, a third slip ring and a fourth slip ring, the slip rings are connected to the rotating shaft, and the slip rings rotate synchronously with the rotor; each of the slip rings is provided with a plurality of conductive layers and a plurality of insulating layers, the conductive layers and the insulating layers are evenly and alternately distributed, and the number of the conductive layers = the number of the insulating layers = the number of poles of the rotor; The four-phase brushed reluctance motor further includes a casing and a brush holder end cover, and a bearing is provided between the casing and the rotating shaft.

2. The four-phase brushed reluctance motor according to claim 1, characterized in that: A power supply and a first brush holder assembly are provided between the A-phase winding and the first slip ring; a power supply and a second brush holder assembly are provided between the B-phase winding and the second slip ring; a power supply and a third brush holder assembly are provided between the C-phase winding and the third slip ring; a power supply and a fourth brush holder assembly are provided between the D-phase winding and the fourth slip ring.

3. The four-phase brushed reluctance motor according to claim 1 or claim 2, characterized in that: The first brush holder assembly, the second brush holder assembly, the third brush holder assembly and the fourth brush holder assembly have the same structure; The first brush holder assembly includes two brushes and a brush holder, the two brushes are in contact with the first slip ring, one of the brushes of the first brush holder assembly is connected to the A-phase winding, and the other brush is connected to the power supply, and the power supply is connected to the A-phase winding. When the first slip ring rotates until its conductive layer contacts the two brushes of the first brush holder assembly, the power supply and the A-phase winding form a closed loop so that the A-phase winding is energized; The second brush holder assembly includes two brushes and a brush holder, the two brushes are in contact with the second slip ring, one of the brushes of the second brush holder assembly is connected to the B-phase winding, and the other brush is connected to the power supply, and the power supply is connected to the B-phase winding. When the second slip ring rotates until its conductive layer contacts the two brushes of the second brush holder assembly, the power supply and the B-phase winding form a closed loop so that the B-phase winding is energized; The third brush holder assembly includes two brushes and a brush holder, the two brushes are in contact with the third slip ring, one of the brushes of the third brush holder assembly is connected to the C-phase winding, the other brush is connected to the power supply, the power supply is connected to the C-phase winding, when the third slip ring rotates until its conductive layer contacts the two brushes of the third brush holder assembly, the power supply and the C-phase winding form a closed loop so that the C-phase winding is energized; The fourth brush holder assembly includes two brushes and a brush holder, the two brushes are in contact with the fourth slip ring, one of the brushes of the fourth brush holder assembly is connected to the D-phase winding, the other brush is connected to the power supply, the power supply is connected to the D-phase winding, and when the fourth slip ring rotates until its conductive layer contacts the two brushes of the fourth brush holder assembly, the power supply and the D-phase winding form a closed loop so that the D-phase winding is energized; The brush is installed in the brush holder, and the brush holder is installed in the brush holder end cover.

4. The four-phase brushed reluctance motor according to any one of claims 1 to 3, characterized in that: The brushes of the first brush holder assembly are in alternate contact with the conductive layer and the insulating layer of the first slip ring, so that the A-phase winding is energized or de-energized; The brushes of the second brush holder assembly are in alternate contact with the conductive layer and the insulating layer of the second slip ring, so that the B-phase winding is energized or de-energized; The brushes of the third brush holder assembly are in alternate contact with the conductive layer and the insulating layer of the third slip ring, so that the C-phase winding is energized or de-energized; The brushes of the fourth brush holder assembly are in alternate contact with the conductive layer and the insulating layer of the fourth slip ring, so that the D-phase winding is energized or de-energized.

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