A stator, an electrically excited doubly salient pole motor, and a motor control method.

Abstract

This invention provides a stator, an electrically excited doubly salient pole motor, and a motor control method, relating to the field of motor technology. It solves the problem of large span of the electric excitation winding in existing electrically excited doubly salient pole motors. The stator includes a stator core, an armature winding, and an excitation winding. The stator core has multiple stator salient poles arranged equidistantly along the circumference, with winding slots formed between adjacent stator salient poles. The armature winding is wound around all the stator salient poles of the stator core within the winding slots. A notch is provided in the yoke of the stator core, connecting the inner and outer sides of the stator core radially, thus breaking the stator core at the notch. The excitation winding is wound on the yoke of the stator core at a position between two adjacent stator salient poles. The excitation winding and the notch are located at opposite ends of the stator core radially. Compared with existing technologies, this invention can reduce the span of the electric excitation winding, lower costs, and improve motor efficiency.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically to a stator, electrically excited doubly salient pole motor and a motor control method. Background Technology

[0002] Double salient pole motors have the advantages of high torque at low speeds, simple and robust structure, and low cost. The most common products are switched reluctance motors (SRM), and their derivatives, permanent magnet double salient pole motors (DSPM) and electrically excited double salient pole motors (DSEM).

[0003] Switched reluctance motors (SRMs) offer excellent performance, but their armature windings have a large number of turns, requiring significant winding space, and resulting in a larger core and heavier enameled wire. In contrast, permanent magnet doubly salient pole motors (DSPMs) and electrically excited doubly salient pole motors (DSEMs) have altered their operating principles due to the addition of an excitation assembly. These motors have fewer armature winding turns, reducing not only the core's size and weight but also the amount of enameled wire used in the armature winding. This improves their cost-effectiveness, making their size, weight, and performance comparable to a permanent magnet brushless DC motor (BLDC) of the same power, while at a slightly lower cost.

[0004] However, rare-earth magnets used in permanent magnet doubly salient pole motors (DSPMs) are scarce resources, and their prices have increased several times over in recent years. Even though the amount of rare-earth magnets used in DSPMs is slightly less than that in permanent magnet brushless DC motors (BLDCs), the price is still relatively high. Electrically excited doubly salient pole motors (DSEMs), on the other hand, do not use magnets at all. Their cost is lower than that of DSPMs, BLDCs, and switched reluctance motors (SRMs), but their disadvantage is that the electrically excited winding typically needs to cross three stator salient poles (e.g., ...). Figure 6 As shown, there are slots between the stator salient poles, the overall span is large, the enameled wire used in the excitation winding is long, and the internal resistance of the excitation winding is relatively large, resulting in more energy loss and a significant decrease in efficiency.

[0005] Permanent magnet brushless DC (BLDC) motors employ a six-step pulse method, using current to generate a magnetic field in the armature windings. This magnetic field, through attraction and repulsion with the magnets on the rotor, drives the rotor to rotate normally. In BLDC speed control, to improve controllability at high speeds, mechanical or electronic field weakening is often used to reduce the back electromotive force (EMF) of the armature windings, thereby enhancing controllability and enabling the motor to output power and torque even at high speeds. Mechanical field weakening often involves short-circuiting part of the permanent magnet with a magnetic conductor to reduce the magnetic field strength. This method has almost no efficiency reduction but is structurally complex and costly. Electronic field weakening applies a field-weakening current to the armature windings at appropriate times to partially offset the magnetic field, reducing the back EMF and thus maintaining power output at high speeds. However, this reduces efficiency and complicates the algorithm. Therefore, it is impossible to achieve both low-cost and high-efficiency field weakening in BLDC motors. Summary of the Invention

[0006] The purpose of this invention is to design a stator, an electrically excited doubly salient pole motor, and a motor control method to solve the problem of large span of the electrically excited winding in the electrically excited doubly salient pole motor, thereby reducing the span of the electrically excited winding, lowering costs, and improving motor efficiency.

[0007] This invention is achieved through the following technical solution:

[0008] This invention provides a stator, comprising a stator core, an armature winding, and an excitation winding. The stator core has a plurality of stator salient poles arranged equidistantly along the circumferential direction, with a winding slot formed between adjacent stator salient poles. The armature winding is wound around all the stator salient poles of the stator core within the winding slot. A notch is provided in the yoke of the stator core, connecting the inner and outer sides of the stator core radially, thus breaking the stator core at the notch. The excitation winding is wound around the yoke of the stator core at a position between two adjacent stator salient poles. The excitation winding and the notch are located at opposite ends of the stator core radially.

[0009] With the above-described structure, the excitation winding is wound directly on the yoke of the stator core between one or two adjacent stator salient poles, eliminating the need to span multiple stator salient poles and reducing the span of the excitation winding. Therefore, this configuration reduces the length of the enameled wire in the excitation winding, lowering costs while reducing energy loss, thus improving motor efficiency and reducing costs.

[0010] The stator core has a notch in the yoke section, allowing for the formation of a non-closed magnetic circuit. This notch, along with the excitation winding, is located at opposite ends of the stator core's radial direction, dividing all the stator salient poles into two groups. When direct current is applied to the excitation winding, each group of stator salient poles forms identical magnetic poles, and different groups of stator salient poles form paired magnetic poles, creating a fixed magnetic field at both ends of the excitation winding and the notch. This design allows for easy modification of the magnetic field strength in the stator core by controlling the current flowing through the excitation winding, achieving high motor output power and torque over a wide speed range in a highly economical manner.

[0011] To further improve the implementation of this invention, the following configuration structure is adopted: the armature winding is connected in a star configuration to form a three-phase winding.

[0012] To further improve the implementation of this invention, the following structure is specifically adopted: a connector with non-magnetic properties is provided at the notch, and the connector is respectively connected to the two ends of the yoke of the stator core at the notch to seal the notch.

[0013] When the above-mentioned structure is adopted, the yoke of the stator core at both ends of the gap is connected and filled by a connector made of non-magnetic material. This can improve the mechanical strength of the stator core at the gap and make the entire stator structure more robust.

[0014] To further improve the implementation of the present invention, the following configuration structure is adopted: the stator core is equipped with a stator frame, the armature winding is wound on the stator frame, and the excitation winding is wound on the stator frame.

[0015] To further improve the implementation of the present invention, the following configuration is adopted: the stator salient pole points to the inner or outer side of the stator core.

[0016] The present invention also provides an electrically excited doubly salient pole motor, including a rotor and the stator described above, wherein the rotor and the stator are concentrically arranged and can rotate relative to each other; the stator salient pole of the stator points radially toward the rotor, and the rotor salient pole of the rotor points radially toward the stator.

[0017] To further improve the realization of the present invention, the following structure is specifically adopted: the rotor is inserted into the stator core of the stator.

[0018] To further improve the realization of the present invention, the following structure is specifically adopted: the stator core of the stator is inserted into the rotor.

[0019] To further improve the implementation of the present invention, the following configuration structure is adopted: it also includes a housing, the stator is fixed inside the housing, and the rotor is disposed inside the housing and mounted to the housing through a motor shaft.

[0020] The present invention also provides a motor control method, which uses the above-mentioned electrically excited doubly salient pole motor as a motor or generator.

[0021] When used as an electric motor, the motor control method includes: when the rotor of the electrically excited doubly salient pole motor is rotating normally, adjusting the current value of the excitation winding through the stator of the electrically excited doubly salient pole motor to change the magnetic field strength in the stator core, thereby adjusting the motor output power and output torque.

[0022] When used as a generator, the motor control method includes: when the rotor of the electrically excited doubly salient pole motor is rotating normally, adjusting the current value of the excitation winding of the stator of the electrically excited doubly salient pole motor to change the magnetic field strength in the stator core of the stator, thereby adjusting the voltage and current output by the armature winding of the stator of the electrically excited doubly salient pole motor.

[0023] The present invention has the following advantages and beneficial effects:

[0024] In this invention, the excitation winding is wound directly on the yoke of the stator core between one or two adjacent stator salient poles, eliminating the need to span multiple stator salient poles and reducing the span of the excitation winding. Therefore, this arrangement reduces the length of the enameled wire in the excitation winding, lowering costs and reducing power loss, thereby improving motor efficiency and reducing costs.

[0025] In this invention, a notch is provided in the yoke of the stator core to form a non-closed magnetic circuit gap. The notch and the excitation winding are located at opposite ends of the stator core's radial direction, dividing all the stator salient poles into two groups. When direct current is applied to the excitation winding, identical magnetic poles are formed on each group of stator salient poles, and stator salient poles from different groups form paired magnetic poles, creating a fixed magnetic field at both ends of the excitation winding and the notch. This arrangement allows for easy modification of the magnetic field strength in the stator core by controlling the current through the excitation winding, achieving high motor output power and torque over a wide speed range in a highly economical manner. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a stator without connectors;

[0028] Figure 2 This is a structural schematic diagram of a stator with connecting parts;

[0029] Figure 3 This is a schematic diagram of an internal rotor type electrically excited doubly salient pole motor.

[0030] Figure 4 This is a schematic diagram of an external rotor type electrically excited doubly salient pole motor.

[0031] Figure 5 The connection structure of the armature winding is shown;

[0032] Figure 6 The winding configuration of the excitation winding of an existing permanent magnet doubly salient pole motor is shown (the thick solid line in the figure represents the excitation winding);

[0033] The diagram is marked as follows:

[0034] 1. Stator core; 11. Stator salient pole; 12. Notch; 13. Connector;

[0035] 2. Armature winding;

[0036] 3. Excitation winding;

[0037] 4. Stator frame;

[0038] 5. Rotor;

[0039] 6. Outer shell;

[0040] 7. Motor shaft. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0042] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Example 1:

[0045] A stator design can reduce the span of the electrically excited windings, thereby lowering costs and improving motor efficiency, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, it is specifically configured with the following structure:

[0046] This type of stator includes a stator core 1, an armature winding 2, and an excitation winding 3.

[0047] The stator core 1 is provided with a plurality of stator salient poles 11 arranged equidistantly along the circumference. The stator salient poles 11 are connected by a yoke, and a winding slot for winding the armature winding 2 is formed between two adjacent stator salient poles 11.

[0048] This embodiment will continue the explanation using the case of setting six stator salient poles 11 as an example. Of course, in addition to setting six stator salient poles 11, twelve, eighteen, etc., can also be set.

[0049] The armature winding 2 is arranged in the winding slot and wound on all the stator salient poles 11 of the stator core 1. The armature winding 2 is connected in a star connection structure to form a three-phase winding. After the two sets of armature windings 2 are connected in a star connection, they are connected in parallel to output the three phases A, B, and C. The wire ends of each set are connected together at a common point as a midpoint and are not led out. The wire ends are led out as phase lines.

[0050] The yoke of the stator core 1 is provided with a notch 12 extending in the circumferential direction. The notch 12 penetrates the yoke of the stator core 1 in the axial direction. At the same time, the notch 12 connects the inner and outer sides of the stator core 1 in the radial direction, so that the stator core 1 is broken at the notch 12, forming an opening structure that is roughly C-shaped.

[0051] The excitation winding 3 is wound around the inner and outer sides of the yoke of the stator core 1 to be wound on the yoke of the stator core 1. The winding position of the excitation winding 3 is located between two adjacent stator salient poles 11. The portion of the excitation winding 3 located on the inner side of the stator core 1 is located in the winding slot of two adjacent stator salient poles 11.

[0052] The excitation winding 3 and the notch 12 are located at the two ends of the stator core 1 in the radial direction. Therefore, the notch 12 is also located between two adjacent stator salient poles 11.

[0053] Among them, the stator salient pole 11 can point to the inside of the stator core 1, and is used to form a matching rotor as follows: Figure 3 The internal rotor motor shown can also point outwards from the stator core 1, used to form a configuration such as... Figure 4 The external rotor motor shown.

[0054] Preferably, if a stator frame 4 is installed on the stator core 1, then the armature winding 2 is wound on the stator frame 4, and the excitation winding 3 is wound on the stator frame 4.

[0055] In this embodiment, the excitation winding 3 is wound directly on the yoke of the stator core 1 at a position between one or two adjacent stator salient poles 11, eliminating the need to span multiple stator salient poles and reducing the span of the excitation winding 3. Therefore, this arrangement can reduce the length of the enameled wire in the excitation winding 3, thereby reducing costs and power losses in the excitation winding 3, which can be used to improve motor efficiency and reduce costs.

[0056] A notch 12 is provided in the yoke of the stator core 1 to form a non-closed magnetic circuit notch. The notch 12 and the excitation winding 3 are located at opposite ends of the stator core 1 in the radial direction, dividing all the stator salient poles 11 on the stator core 1 into two groups of three stator salient poles 11 each. When a direct current is applied to the excitation winding 3, the same magnetic pole is formed on each group of stator salient poles 11, and stator salient poles 11 from different groups form paired magnetic poles, creating a fixed magnetic field at both ends of the excitation winding 3 and the notch 12. Therefore, this arrangement allows for easy control of the current value through the excitation winding 3 to change the magnetic field strength in the stator core 1, achieving a large motor output power and output torque over a wide speed range in a very economical manner.

[0057] Example 2:

[0058] This embodiment is a further optimization based on the above embodiments. To better realize the present invention, the following configuration structure is specifically adopted:

[0059] In this embodiment, as Figure 2 As shown, the stator core 1 of this type of stator has a connector 13 at its notch 12. The connector is made of a non-magnetic material, so the connector 13 is non-magnetic. The shape of the connector 13 is not limited. It connects the two ends of the yoke of the stator core 1 at the notch 12, respectively, sealing the notch 12 and providing a connection between the two ends of the yoke of the stator core 1 at the notch 12.

[0060] In this embodiment, the stator core 1 at both ends of the gap 12 is connected and filled by a connector 13 made of non-magnetic material, which can improve the mechanical strength of the stator core 1 at the gap 12 and make the entire stator structure more robust.

[0061] Example 3:

[0062] This embodiment further provides an electrically excited doubly salient pole motor based on any of the above embodiments, specifically employing the following configuration structure:

[0063] This type of electrically excited double salient pole motor includes a rotor 5 and a stator, which are concentrically arranged and can rotate relative to each other.

[0064] The stator core 1 is provided with six stator salient poles 11, and the rotor core is provided with four rotor salient poles arranged equidistantly along the circumference, forming a 6-4 pole unit motor. Of course, it can also be combined into a 12-8 or other pole number motors according to a similar design. Among them, the stator salient poles 11 of the stator point radially towards the rotor 5, and the rotor salient poles of the rotor 5 also point radially towards the stator. There is an air gap between the stator salient poles 11 and the rotor salient poles.

[0065] The rotor 5 and stator can be configured as follows, depending on requirements. Figure 3 The structure shown depicts an internal rotor motor where the rotor 5 is inserted into the stator core 1 of the stator. The stator is fixed inside the housing 6, and the rotor 5 is disposed within the housing 6 and mounted to the housing 6 via the motor shaft 7. The rotor 5 and stator can also be configured according to requirements. Figure 4 The structure shown in the figure is such that the stator core 1 is inserted into the rotor 5 to form an external rotor motor.

[0066] Armature winding 2 is connected in a star configuration to form a three-phase winding. The two sets of armature winding 2 are connected in a star configuration to output three phases A, B, and C. The wire ends of each set are connected together at a common point as the midpoint and are not led out. The wire ends are led out as phase lines.

[0067] As a preferred configuration of the stator core 1 in this embodiment, such as Figure 1As shown, the portion of the stator core 1 used for winding the excitation winding 3 expands radially outward, thereby spatially expanding the winding slot between two adjacent stator salient poles 11, which facilitates the winding of the excitation winding.

[0068] Example 4:

[0069] This embodiment further provides a motor control method based on the above embodiments. Furthermore, to better realize the present invention, the following structural configuration is specifically adopted:

[0070] This motor control method applies to the electrically excited doubly salient pole motor in Example 3. This electrically excited doubly salient pole motor can be used as a motor or a generator.

[0071] When used as an electric motor, the motor control method includes: when the rotor 5 of the electrically excited doubly salient pole motor is rotating normally, adjusting the current value of the excitation winding 3 of the stator of the electrically excited doubly salient pole motor to change the magnetic field strength in the stator core 1, thereby adjusting the motor output power and output torque.

[0072] When used as a generator, the motor control method includes: when the rotor 5 of the electrically excited doubly salient pole motor is rotating normally, the magnetic field strength in the stator core 1 of the electrically excited doubly salient pole motor is changed by adjusting the current value of the excitation winding 3 of the stator of the electrically excited doubly salient pole motor, thereby adjusting the voltage and current output by the armature winding 2 of the stator of the electrically excited doubly salient pole motor.

[0073] The electrically excited doubly salient pole motor of the present invention is equipped with a controller during use. This controller is mainly used to control the current and voltage of the armature winding 2 and the excitation winding 3. The two sets of armature windings 2 of the electrically excited doubly salient pole motor are as follows: Figure 5 As shown, after being connected in a star configuration, the three phases A, B, and C are output in parallel. The wire ends of each group are connected together at a common point as the midpoint and are not led out. The wire ends are led out as phase lines.

[0074] The notch 12 and the excitation winding 3 divide the six stator salient poles 11 on the stator core 1 into two groups, with three stator salient poles 11 in each group. When the excitation winding 3 is energized with DC current by the controller, the current forms a fixed magnetic field on both sides of the notch 12 at the yoke of the excitation winding 3 and the stator core 1. Of the two groups of stator salient poles 11 on both sides of the notch 12, one group forms an N pole or an S pole, and the other group forms a paired S pole or an N pole.

[0075] An electrically excited doubly salient pole motor can be used as an electric motor.

[0076] When a voltage is applied to two terminals of the three-phase winding, current actually flows through two of the coils, one positive and one negative. The positive current strengthens the magnetic field on the corresponding stator salient pole 11, while the negative current weakens the magnetic field on the corresponding stator salient pole 11. Thus, when voltages are applied in a specific sequence, the magnetic fields of the armature winding 2 and the excitation winding 3 on the stator salient pole 11 are superimposed. This strengthens the magnetic field of the stator salient pole 11 in front of the rotor salient pole in the direction of rotor rotation, while weakening the magnetic field of the stator salient pole 11 away from the rotor salient pole. This generates magnetic torque and reluctance torque between the rotor salient pole and the stator salient pole 11, thereby driving the motor shaft 7 to rotate. For example, when a voltage is applied between the C-phase terminal and the B-phase terminal, the current further strengthens the magnetic field of the stator salient pole 11 where phase C is located, and weakens the magnetic field of the stator salient pole 11 where phase B is located. Due to the magnetic torque and reluctance torque, the rotor rotates counterclockwise. When the rotor poles nearly align with the stator salient pole 11 of phase C, a voltage is applied between the terminals of phase A and phase C. The current further strengthens the magnetic field of the stator salient pole 11 where phase A is located, and weakens the magnetic field of the stator salient pole 11 where phase C is located. Due to the magnetic torque and reluctance torque, the rotor continues to rotate counterclockwise. When the rotor poles nearly align with the stator salient pole 11 of phase A, a voltage is applied between the terminals of phase B and phase A. The current further strengthens the magnetic field of the stator salient pole 11 where phase B is located, and weakens the magnetic field of the stator salient pole 11 where phase A is located. Due to the magnetic torque and reluctance torque, the rotor continues to rotate counterclockwise, completing one electrical cycle. In the next electrical cycle, phases A, B, and C are energized sequentially to maintain the rotor's normal, continuous counterclockwise rotation.

[0077] At different rotor speeds, the magnetic field strength in the stator core 1 can be altered by adjusting the current in the excitation winding 3 of the stator of an electrically excited doubly salient pole motor. Simultaneously, by appropriately controlling the current in the armature winding 2, a wide range of adjustment can be achieved to obtain greater motor output power and torque. This motor control method is similar to the field weakening control method of permanent magnet brushless DC motors, improving motor efficiency without the structural complexity and increased costs associated with mechanical field weakening, or the efficiency reduction and algorithmic complexity of electronic field weakening. It only requires direct adjustment of the excitation current, making it more economical than permanent magnet brushless DC motors, reducing costs, and especially at high speeds, further saving energy and improving the product's cost-effectiveness.

[0078] Electrically excited doubly salient pole motors can also be used as controllable generators.

[0079] After the electrically excited doubly salient pole motor starts and the rotor 5 rotates normally, the armature drive current supplied to the armature winding 2 is stopped. The motor shaft 7 is driven to rotate by other power sources. The armature winding 2 cuts the magnetic field lines to generate back electromotive force, which is output to the outside by the controller. The magnitude of the voltage and current can be controlled by adjusting the current value through the excitation winding 3, so as to change the magnetic field strength in the stator core 1 of the stator of the electrically excited doubly salient pole motor, thereby adjusting the voltage and current output by the armature winding 2 of the stator of the electrically excited doubly salient pole motor.

[0080] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A stator, comprising a stator core (1) and an armature winding (2), wherein the stator core (1) has a plurality of stator salient poles (11) arranged equidistantly along the circumferential direction, and a winding slot is formed between adjacent stator salient poles (11); the armature winding (2) is wound around all the stator salient poles (11) of the stator core (1) within the winding slot; characterized in that: It also includes the excitation winding (3); The yoke of the stator core (1) is provided with a notch (12) that extends circumferentially and penetrates axially. The notch (12) connects the inner and outer sides of the stator core (1) in the radial direction, so that the stator core (1) is broken at the notch (12) to form an approximately C-shaped opening structure. The excitation winding (3) is wound on the yoke of the stator core (1) at a position between two adjacent stator salient poles (11). The excitation winding (3) and the notch (12) are located at both ends of the stator core (1) in the radial direction, so that all the stator salient poles (11) on the stator core (1) are divided into two groups, and each group of stator salient poles (11) forms the same magnetic pole when the excitation winding (3) is energized, and the stator salient poles (11) of different groups form paired magnetic poles; The armature winding (2) is connected in a star configuration to form a three-phase winding; A connector (13) with non-magnetic properties is provided at the gap (12). The connector (13) connects the two ends of the yoke of the stator core (1) at the gap (12) respectively, and seals the gap (12). The stator core (1) is equipped with a stator frame (4), the armature winding (2) is wound on the stator frame (4), and the excitation winding (3) is wound on the stator frame (4).

2. A stator according to claim 1, characterized in that: The stator salient pole (11) points to the inside or outside of the stator core (1).

3. An electrically excited doubly salient pole motor, characterized in that: Includes a rotor (5) and a stator as described in claim 1 or 2, wherein the rotor (5) and the stator are concentrically arranged and can rotate relative to each other; the stator salient pole (11) of the stator points radially toward the rotor (5), and the rotor salient pole of the rotor (5) points radially toward the stator.

4. The electrically excited doubly salient pole motor according to claim 3, characterized in that: The rotor (5) is inserted into the stator core (1) of the stator.

5. An electrically excited doubly salient pole motor according to claim 3, characterized in that: The stator core (1) of the stator is inserted into the rotor (5).

6. The electrically excited doubly salient pole motor according to claim 3, characterized in that: It also includes a housing (6), the stator is fixed inside the housing (6), and the rotor (5) is disposed inside the housing (6) and mounted on the housing (6) via a motor shaft (7).

7. A motor control method, characterized in that, With respect to the electrically excited doubly salient pole motor according to any one of claims 3-6, the electrically excited doubly salient pole motor is used as a motor or a generator; When used as an electric motor, the motor control method includes: when the rotor (5) of the electrically excited doubly salient pole motor is rotating normally, adjusting the current value of the excitation winding (3) of the stator of the electrically excited doubly salient pole motor to change the magnetic field strength in the stator core (1) to adjust the motor output power and output torque. When used as a generator, the motor control method includes: when the rotor (5) of the electrically excited doubly salient pole motor is rotating normally, adjusting the current value of the excitation winding (3) of the stator of the electrically excited doubly salient pole motor to change the magnetic field strength in the stator core (1) of the stator of the electrically excited doubly salient pole motor, thereby adjusting the voltage and current output by the armature winding (2) of the stator of the electrically excited doubly salient pole motor.

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