Electrically excited synchronous motor with a stator structure having multiple exciting teeth and multiple armature teeth

Abstract

The present invention relates to an electrically excited synchronous motor with a stator structure having multiple excitation teeth and multiple armature teeth, comprising a stator module and a rotor module. The rotor module includes a rotor core and a rotating shaft located within the rotor core. The stator module includes a stator core, an excitation winding, and an armature winding. Multiple excitation teeth and multiple armature teeth are circumferentially provided in the stator core, wherein every two excitation teeth and every two armature teeth are alternately arranged, and every two adjacent excitation teeth and every two adjacent armature teeth respectively form a V-shaped structure or a Y-shaped structure. The excitation winding includes multiple groups of excitation coils, and each excitation coil is wound across two adjacent excitation teeth. The armature winding includes multiple groups of armature coils, and each armature coil is wound across two adjacent armature teeth. The present invention adopts a structure of non-overlapping windings, multiple excitation teeth, and multiple armature teeth, which not only increases the areas of the excitation slots and the armature slots, but also can effectively reduce the copper loss of the motor and improve the torque and power density of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motor manufacturing, and particularly to an electrically excited synchronous motor with a stator structure having multiple exciting teeth and multiple armature teeth. Background Art

[0002] The 21st century is the century of energy. With the intensification of global environmental changes, the shortage of fossil fuel resources, and the increasingly serious environmental pollution problems, how to cleanly and efficiently utilize energy to serve production and life has become an urgent problem for people to solve. Electric energy is recognized as the cleanest and safest energy in the 21st century. As a major energy country in the world, China produces and consumes more than about one-fourth of the world's electric energy. And motors, as devices for electromechanical energy conversion, consume more than 60% of China's electric energy, which is an important embodiment of the country's core industrial competitiveness. Therefore, with the rapid development of China's economy, higher and higher requirements are put forward for the performance of motors in all walks of life.

[0003] Since the 1990s, due to the rapid development of rare earth permanent magnet materials, the performance of permanent magnet materials has been greatly improved. A new type of motor structure - the stator permanent magnet brushless motor structure has emerged. It has higher torque density, power density, and efficiency, but there are also some disadvantages as follows: (1) The uncertainty of the price and supply of permanent magnet materials (such as neodymium iron boron, etc.); (2) The permanent magnets undergo irreversible demagnetization under harsh environments such as high temperature and severe vibration, affecting the motor performance; (3) The permanent magnets increase the difficulty and cost of motor processing and manufacturing, and also reduce the mechanical strength of the motor; (4) Affected by the permanent magnets, it is difficult to adjust the air-gap magnetic flux of the motor, and it is not applicable in some occasions with special requirements for field-weakening speed regulation performance. For the above reasons, stator electrically excited brushless motors have received more and more attention and research in recent years.

[0004] Stator electrically excited brushless motors have the same advantages as stator permanent magnet brushless motors, such as brushless, maintenance-free, easy heat dissipation, and suitable for high-speed operation. At the same time, they avoid the risk of irreversible demagnetization of permanent magnets and have excellent field-weakening performance, and have received extensive attention in the fields of aerospace, new energy vehicles, and wind power generation. However, the traditional stator electrically excited brushless motor has lower torque density and power density than the stator permanent magnet brushless motor with the same structure, and the exciting winding increases the copper loss of the motor and reduces the motor efficiency. Therefore, adopting effective methods to improve the torque and power density of the stator electrically excited brushless motor and improve the operating efficiency of the motor has important theoretical significance and practical value. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide an electrically excited synchronous motor with a stator structure having multiple exciting teeth and multiple armature teeth. Based on having a high sinusoidal per-phase induced electromotive force, unipolar per-phase magnetic flux, and excellent field regulation performance, the motor adopts a non-overlapping winding, multiple exciting teeth, and multiple armature teeth structure, which not only increases the area of the exciting slots and armature slots, but also can effectively reduce the copper loss of the motor, and improve the torque and power density of the motor.

[0006] The present invention is realized through the following technical solutions:

[0007] An electrically excited synchronous motor with a stator structure having multiple exciting teeth and multiple armature teeth, including a stator module and a rotor module. The rotor module includes a rotor core and a rotating shaft located inside the rotor core. The stator module includes a stator core, an exciting winding, and an armature winding. Multiple exciting teeth and multiple armature teeth are circumferentially provided in the stator core. Among them, every two exciting teeth and every two armature teeth are alternately arranged, and every two adjacent exciting teeth and every two adjacent armature teeth respectively form a V-shaped structure or a Y-shaped structure. The exciting winding includes multiple groups of exciting coils, and each of the exciting coils is wound across two adjacent exciting teeth. The armature winding includes multiple groups of armature coils, and each of the armature coils is wound across two adjacent armature teeth. Both the exciting winding and the armature winding are non-overlapping windings, and both the exciting coils and the armature coils adopt a concentrated winding method. The winding directions of all the exciting coils are the same, and the winding directions of all the armature coils are the same.

[0008] According to the above technical solution, preferably, the stator core is respectively provided with 6 exciting teeth and 6 armature teeth. The exciting coils are provided in three groups, and the mechanical angles between each of the exciting coils are 120°. The armature coils are provided in three groups, forming an A-phase winding, a B-phase winding, and a C-phase winding, and the mechanical angles between the armature coils of each phase are 120°.

[0009] According to the above technical solution, preferably, multiple permanent magnets are circumferentially provided in the stator core, and each of the permanent magnets adopts a radial magnetization method, and the magnetization direction of the permanent magnet faces the inside of the motor.

[0010] According to the above technical solution, preferably, 3 permanent magnets are circumferentially provided in the stator core, and each of the permanent magnets is respectively embedded in the exciting tooth yoke part of the V-shaped structure or the Y-shaped structure.

[0011] According to the above technical solution, preferably, 6 permanent magnets are circumferentially embedded in the stator core, and each of the permanent magnets is respectively embedded at the tooth tips of each exciting tooth.

[0012] The beneficial effects of the present invention are:

[0013] First, the multi-excitation tooth and multi-armature tooth non-overlapping winding stator structure of the electro-magnetic synchronous motor of the present invention can operate in the motor or generator mode, with high torque and power density, good field regulation performance, and strong robustness;

[0014] Second, adjacent excitation teeth and armature teeth adopt a V-shaped or Y-shaped structure, reducing the useless slot area between adjacent excitation teeth and armature teeth, increasing the useful excitation slot and armature slot area, enhancing the excitation magnetic field, and improving the torque output ability of the motor;

[0015] Third, permanent magnets are embedded in the stator core, enhancing the torque density and power density of the motor. When the excitation winding of the motor fails, the motor can still operate relying on the magnetic flux generated by the permanent magnets, further improving the fault-tolerant operation ability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 12 is a schematic diagram of the electro-magnetic synchronous motor with a multi-excitation tooth and multi-armature tooth non-overlapping winding stator structure of the present invention when each two adjacent excitation teeth and armature teeth form a V-shaped structure in Embodiment 1.

[0017] Figure 2 FIG. 16 is a schematic diagram of the electro-magnetic synchronous motor with a multi-excitation tooth and multi-armature tooth non-overlapping winding stator structure of the present invention when each two adjacent excitation teeth and armature teeth form a Y-shaped structure in Embodiment 1.

[0018] Figure 3 FIG. 20 is a schematic diagram of the distribution of the excitation winding and armature winding of the electro-magnetic synchronous motor with a multi-excitation tooth and multi-armature tooth non-overlapping winding stator structure of the present invention in Embodiment 1.

[0019] Figure 4 FIG. 24 is a waveform diagram of the excitation magnetic flux passing through each turn of the A-phase winding during no-load operation of the electro-magnetic synchronous motor with a multi-excitation tooth and multi-armature tooth non-overlapping winding stator structure of the present invention in Embodiment 1.

[0020] Figure 5 FIG. 28 is a schematic diagram of the magnetic flux path when the excitation magnetic flux passing through the A-phase winding of the electro-magnetic synchronous motor with a multi-excitation tooth and multi-armature tooth non-overlapping winding stator structure of the present invention is the maximum in Embodiment 1.

[0021] Figure 6 FIG. 32 is a schematic diagram of the magnetic flux path when the excitation magnetic flux passing through the A-phase winding of the electro-magnetic synchronous motor with a multi-excitation tooth and multi-armature tooth non-overlapping winding stator structure of the present invention is the minimum in Embodiment 1.

[0022] Figure 7 FIG. 36 is a waveform diagram of the induced electromotive force of each turn of the A-phase winding during no-load operation of the electro-magnetic synchronous motor with a multi-excitation tooth and multi-armature tooth non-overlapping winding stator structure of the present invention in Embodiment 1.

[0023] Figure 8 For the electromagnetic torque waveform diagram of the stator structure of the electro-magnetic excitation synchronous motor with non-overlapping windings of multiple excitation teeth and multiple armature teeth of the present invention during normal operation in Embodiment 1.

[0024] Figure 9 It is a schematic diagram of the stator hybrid excitation synchronous motor with non-overlapping windings of multiple excitation teeth and multiple armature teeth of the present invention in Embodiment 2 when every two adjacent excitation teeth and armature teeth form a V-shaped structure.

[0025] Figure 10 For the schematic diagram of the stator hybrid excitation synchronous motor with non-overlapping windings of multiple excitation teeth and multiple armature teeth of the present invention in Embodiment 2 when every two adjacent excitation teeth and armature teeth form a Y-shaped structure.

[0026] Figure 11 For the schematic diagram of the distribution of the excitation winding and the armature winding of the stator hybrid excitation synchronous motor with non-overlapping windings of multiple excitation teeth and multiple armature teeth of the present invention in Embodiment 2.

[0027] Figure 12 For the waveform diagram of the excitation magnetic flux passing through each turn of the A-phase winding during no-load operation of the stator hybrid excitation synchronous motor with non-overlapping windings of multiple excitation teeth and multiple armature teeth of the present invention in Embodiment 2.

[0028] Figure 13 For the schematic diagram of the magnetic flux path when the excitation magnetic flux passing through the A-phase winding of the stator hybrid excitation synchronous motor with non-overlapping windings of multiple excitation teeth and multiple armature teeth of the present invention in Embodiment 2 is the maximum.

[0029] Figure 14 For the schematic diagram of the magnetic flux path when the excitation magnetic flux passing through the A-phase winding of the stator hybrid excitation synchronous motor with non-overlapping windings of multiple excitation teeth and multiple armature teeth of the present invention in Embodiment 2 is the minimum.

[0030] Figure 15 For the waveform diagram of the induced electromotive force of each turn of the A-phase winding during no-load operation of the stator hybrid excitation synchronous motor with non-overlapping windings of multiple excitation teeth and multiple armature teeth of the present invention in Embodiment 2.

[0031] Figure 16 For the electromagnetic torque waveform diagram of the stator hybrid excitation synchronous motor with non-overlapping windings of multiple excitation teeth and multiple armature teeth of the present invention during normal operation in Embodiment 2.

[0032] Figure 17 It is a schematic diagram of the stator hybrid excitation synchronous motor with non-overlapping windings of multiple excitation teeth and multiple armature teeth of the present invention in Embodiment 3 when every two adjacent excitation teeth and armature teeth form a V-shaped structure.

[0033] Figure 18For Embodiment 3, when a Y-shaped structure is formed by every two adjacent exciting teeth and armature teeth, it is a schematic diagram of the stator of the hybrid-excitation synchronous motor with multiple exciting teeth and multiple armature teeth non-overlapping windings of the present invention.

[0034] Figure 19 For Embodiment 3, it is a schematic diagram of the distribution of the exciting winding and the armature winding of the stator of the hybrid-excitation synchronous motor with multiple exciting teeth and multiple armature teeth non-overlapping windings of the present invention.

[0035] Figure 20 For Embodiment 3, it is a waveform diagram of the exciting magnetic flux passing through each turn of the A-phase winding during no-load operation of the stator of the hybrid-excitation synchronous motor with multiple exciting teeth and multiple armature teeth non-overlapping windings of the present invention.

[0036] Figure 21 For Embodiment 3, it is a schematic diagram of the magnetic flux path when the exciting magnetic flux passing through the A-phase winding of the stator of the hybrid-excitation synchronous motor with multiple exciting teeth and multiple armature teeth non-overlapping windings of the present invention is the maximum.

[0037] Figure 22 For Embodiment 3, it is a schematic diagram of the magnetic flux path when the exciting magnetic flux passing through the A-phase winding of the stator of the hybrid-excitation synchronous motor with multiple exciting teeth and multiple armature teeth non-overlapping windings of the present invention is the minimum.

[0038] Figure 23 For Embodiment 3, it is a waveform diagram of the induced electromotive force of each turn of the A-phase winding during no-load operation of the stator of the hybrid-excitation synchronous motor with multiple exciting teeth and multiple armature teeth non-overlapping windings of the present invention.

[0039] Figure 24 For Embodiment 3, it is a waveform diagram of the electromagnetic torque during normal operation of the stator of the hybrid-excitation synchronous motor with multiple exciting teeth and multiple armature teeth non-overlapping windings of the present invention.

[0040] In the figure: 1. Stator core; 2. Exciting winding; 211. Exciting coil I; 212. Exciting coil II; 213. Exciting coil III; 3. Armature winding; 311. Armature coil I; 321. Armature coil II; 331. Armature coil III; 4. Exciting tooth; 5. Armature tooth; 6. Rotating shaft; 7. Rotor core; 8. Permanent magnet. Detailed implementation manners

[0041] In order to enable those skilled in the art of the present technology to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and the best embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0042] In the description of the invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the invention.

[0043] Embodiment 1: As Figure 1-3 shown, the electric excitation synchronous motor involved in the present invention has a 12 / 10 or 12 / 14 pole structure, including a stator module and a rotor module. The rotor module includes a rotor core 7 and a rotating shaft 6 located inside the rotor core 7. Both the stator core 1 and the rotor core 7 are salient pole structures. Due to the salient pole structure adopted by the stator and rotor, the reluctance torque generated by the salient pole effect can improve the torque output ability of the motor. At the same time, the salient pole stator and rotor cores 7 also have the advantage of being easy to process, and enable the motor to operate at a higher speed. In this example, both the stator core 1 and the rotor core 7 are straight slot structures, and both the stator core 1 and the rotor core 7 adopt silicon steel sheet magnetic conductive materials. There is a layer of air gap between the stator core 1 and the rotor core 7. The stator module includes a stator core 1, an exciting winding 2 and an armature winding 3. A plurality of exciting teeth 4 and a plurality of armature teeth 5 are arranged circumferentially in the stator core 1. Among them, every two exciting teeth 4 and every two armature teeth 5 are arranged alternately, and every two adjacent exciting teeth 4 and every two adjacent armature teeth 5 respectively form a V-shaped structure or a Y-shaped structure. The exciting winding 2 includes a plurality of groups of exciting coils, and each of the exciting coils is wound across two adjacent exciting teeth 4. The armature winding 3 includes a plurality of groups of armature coils, and each of the armature coils is wound across two adjacent armature teeth 5. Among them, every two groups of the armature coils form the same phase.

[0044] According to the above embodiment, preferably, both the exciting winding 2 and the armature winding 3 are non-overlapping windings, which reduces the coupling between each exciting coil and the armature coil and enhances the fault tolerance ability of the motor. Both the exciting coil and the armature coil adopt a concentrated winding method. Compared with the traditional distributed winding, it reduces the end length, reduces the copper loss, and improves the motor efficiency. Each of the exciting coils has the same winding direction, and after being energized, the magnetic flux directions generated in each of the exciting coils all flow towards the inside of the motor. Each of the armature coils has the same winding direction, and the motor has a relatively sinusoidal back electromotive force waveform and a single-polarity magnetic chain waveform, which reduces the torque ripple of the motor. Therefore, this motor is suitable for AC speed regulation occasions.

[0045] According to the above embodiments, preferably, the stator core 1 is respectively provided with 6 exciting teeth 4 and 6 armature teeth 5, and the mechanical angles between the stator tooth tips on the stator core 1 differ by 30°, and they are evenly distributed along the circumference. The exciting coils are provided with three groups, namely exciting coil I 211, exciting coil II 212, and exciting coil III 213, and the mechanical angles between the exciting coils differ by 120°. The armature coils are provided with three groups, namely armature coil I 311, armature coil II 321, and armature coil III 331, which form a phase A winding, a phase B winding, and a phase C winding. That is, in this example, armature coil I forms the phase A winding, armature coil II forms the phase B winding, and armature coil III forms the phase C winding, and the mechanical angles between the armature coils of each phase differ by 120°.

[0046] When the multi-exciting-tooth 4 and multi-armature-tooth 5 non-overlapping winding stator structure of the electric excitation synchronous motor of the present invention runs without load, the waveform of the exciting magnetic flux passing through each turn of the phase A winding is as Figure 4 shown, and the exciting magnetic flux in the phase A winding is unipolar; when the motor runs to the position as Figure 5 shown, corresponding to point A in Figure 4 , most of the magnetic flux generated by the exciting coil passes through the phase A coil, and the magnetic flux induced in the phase A winding is the largest; when the motor runs to the position as Figure 6 shown, corresponding to point B in Figure 4 , a small part of the magnetic flux generated by the exciting coil passes through the phase A coil, and the magnetic flux induced in the phase A winding is the smallest. As the rotor position changes, the exciting magnetic flux passing through the winding continuously alternates, and then an alternating exciting magnetic flux is linked in the armature winding 3, and then an alternating induced electromotive force is generated; the waveform of the induced electromotive force of each turn of the phase A winding when the multi-exciting-tooth 4 and multi-armature-tooth 5 non-overlapping winding stator structure of the electric excitation synchronous motor of the present invention runs without load is as Figure 7 shown. It can be seen that the waveform of the induced electromotive force in the phase A winding is symmetrical; the waveform of the electromagnetic torque when the multi-exciting-tooth 4 and multi-armature-tooth 5 non-overlapping winding stator structure of the electric excitation synchronous motor of the present invention runs normally is as Figure 8 shown.

[0047] Embodiment 2: As Figures 9-11 shown, the present invention includes a stator module and a rotor module. The rotor module includes a rotor core 7 and a rotating shaft 6 located inside the rotor core 7. The stator module includes a stator core 1, an exciting winding 2, an armature winding 3, and a permanent magnet 8. A plurality of exciting teeth 4 and a plurality of armature teeth 5 are circumferentially arranged in the stator core 1. Among them, every two exciting teeth 4 and every two armature teeth 5 are alternately arranged, and every two adjacent exciting teeth 4 and every two adjacent armature teeth 5 respectively form a V-shaped structure or a Y-shaped structure. The exciting winding 2 includes multiple groups of exciting coils, and each of the exciting coils is wound across two adjacent exciting teeth 4. The armature winding 3 includes multiple groups of armature coils, and each of the armature coils is wound across two adjacent armature teeth 5.

[0048] According to the above embodiments, preferably, a plurality of permanent magnets 8 are circumferentially arranged in the stator core 1. The material of the permanent magnets 8 is neodymium iron boron, samarium cobalt or ferrite. This design enhances the torque density and power density of the motor. When the exciting winding 2 of the motor fails, the motor can still operate relying on the magnetic flux generated by the permanent magnets 8, further improving the fault-tolerant operation ability of the motor. Specifically, 3 permanent magnets 8 are circumferentially arranged in the stator core 1, and each pair of permanent magnets 8 is mechanically offset by 120°. Each of the permanent magnets 8 is respectively embedded in the yoke part of the exciting teeth 4 with a V-shaped structure or a Y-shaped structure. Each of the permanent magnets 8 adopts a radial magnetization method, and the magnetization direction of the permanent magnet 8 faces the interior of the motor, that is, the magnetization direction is radially towards the center of the circle.

[0049] When the multi-exciting-tooth 4 and multi-armature-tooth 5 non-overlapping winding stator hybrid excitation synchronous motor of the present invention operates without load, the waveform of the exciting magnetic flux linkage passing through each turn of the phase A winding is as Figure 12 shown, and the exciting magnetic flux linkage in the phase A winding is unipolar; when the motor runs to the position as Figure 13 shown, corresponding to point A in Figure 12 ), most of the magnetic flux generated by the exciting coil passes through the phase A coil, and the magnetic flux linkage induced in the phase A winding is the largest; when the motor runs to the position as Figure 14 shown, corresponding to point B in Figure 12 ), a small part of the magnetic flux generated by the exciting coil passes through the phase A coil, and the magnetic flux linkage induced in the phase A winding is the smallest. As the rotor position changes, the exciting magnetic flux passing through the winding continuously alternates, and then an alternating exciting magnetic flux linkage is linked in the armature winding 3, thereby generating an alternating induced electromotive force; the waveform of the induced electromotive force of each turn of the phase A winding when the multi-exciting-tooth 4 and multi-armature-tooth 5 non-overlapping winding stator hybrid excitation synchronous motor of the present invention operates without load is as Figure 15 shown. It can be seen that the waveform of the induced electromotive force in the phase A winding is symmetrical; the waveform of the electromagnetic torque when the multi-exciting-tooth 4 and multi-armature-tooth 5 non-overlapping winding stator hybrid excitation synchronous motor of the present invention operates normally is as Figure 15 shown. Figure 16 shown.

[0050] Embodiment 3: As Figures 17-19 shown, the present invention includes a stator module and a rotor module. The rotor module includes a rotor core 7 and a rotating shaft 6 located inside the rotor core 7. The stator module includes a stator core 1, an exciting winding 2, an armature winding 3 and permanent magnets 8. A plurality of exciting teeth 4 and a plurality of armature teeth 5 are circumferentially arranged in the stator core 1, wherein every two exciting teeth 4 and every two armature teeth 5 are arranged alternately, and every two adjacent exciting teeth 4 and every two adjacent armature teeth 5 respectively form a V-shaped structure or a Y-shaped structure. The exciting winding 2 includes a plurality of exciting coils, and each of the exciting coils is wound across two adjacent exciting teeth 4. The armature winding 3 includes a plurality of armature coils, and each of the armature coils is wound across two adjacent armature teeth 5.

[0051] According to the above embodiments, preferably, a plurality of permanent magnets 8 are circumferentially arranged in the stator core 1. The material of the permanent magnets 8 is neodymium iron boron, samarium cobalt or ferrite. This design enhances the torque density and power density of the motor. When the excitation winding 2 of the motor fails, the motor can still operate relying on the magnetic flux generated by the permanent magnets 8, further improving the fault-tolerant operation ability of the motor. Specifically, 6 permanent magnets 8 are embedded in the circumference of the stator core 1. Each of the permanent magnets 8 is respectively embedded at the tip of each excitation tooth 4. Each permanent magnet 8 has a mechanical angle difference of 30°. Each of the permanent magnets 8 adopts a radial magnetization method, and the magnetization direction of the permanent magnet 8 faces the inside of the motor, that is, the magnetization direction is radially towards the center of the circle.

[0052] When the multi-excitation-tooth 4 and multi-armature-tooth 5 non-overlapping winding stator hybrid excitation synchronous motor of the present invention operates without load, the waveform of the excitation magnetic flux passing through each turn of the phase A winding is as Figure 20 shown, and the excitation magnetic flux in the phase A winding is unipolar; when the motor runs to the position as Figure 21 shown, corresponding to point A in Figure 20 , most of the magnetic flux generated by the excitation coil passes through the phase A coil, and the magnetic flux induced in the phase A winding is the largest; when the motor runs to the position as Figure 22 shown, corresponding to point B in Figure 20 , a small part of the magnetic flux generated by the excitation coil passes through the phase A coil, and the magnetic flux induced in the phase A winding is the smallest. As the rotor position changes, the excitation magnetic flux passing through the winding continuously alternates, and then an alternating excitation magnetic flux is linked in the armature winding 3, and then an alternating induced electromotive force is generated; the waveform of the induced electromotive force of each turn of the phase A winding when the multi-excitation-tooth 4 and multi-armature-tooth 5 non-overlapping winding stator hybrid excitation synchronous motor of the present invention operates without load is as Figure 23 shown. It can be seen that the waveform of the induced electromotive force in the phase A winding is symmetrical; the electromagnetic torque waveform when the multi-excitation-tooth 4 and multi-armature-tooth 5 non-overlapping winding stator hybrid excitation synchronous motor of the present invention operates normally is as Figure 24 shown.

[0053] The multi-excitation-tooth and multi-armature-tooth non-overlapping winding stator structure electrically excited synchronous motor of the present invention can operate in the motor or generator operation mode, has high torque and power density, good field weakening performance and strong robustness; at the same time, the adjacent two excitation teeth and armature teeth adopt a V-shaped or Y-shaped structure, reducing the useless slot area between the adjacent two excitation teeth and armature teeth, increasing the useful excitation slot and armature slot area, enhancing the excitation magnetic field, and improving the torque output ability of the motor; in addition, permanent magnets are embedded in the stator core, enhancing the torque density and power density of the motor. When the excitation winding of the motor fails, the motor can still operate relying on the magnetic flux generated by the permanent magnets, further improving the fault-tolerant operation ability of the motor.

[0054] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An electrically excited synchronous motor with a stator structure having multiple excitation teeth and multiple armature teeth, comprising a stator module and a rotor module. The rotor module includes a rotor core and a rotating shaft located within the rotor core, characterized in that, The stator module includes a stator core, an exciting winding, and an armature winding. A plurality of exciting teeth and a plurality of armature teeth are circumferentially provided in the stator core, wherein every two exciting teeth and every two armature teeth are alternately arranged, and every two adjacent exciting teeth and every two adjacent armature teeth respectively form a V-shaped structure or a Y-shaped structure. The exciting winding includes a plurality of exciting coils, and each of the exciting coils is wound across two adjacent exciting teeth. The armature winding includes a plurality of armature coils, and each of the armature coils is wound across two adjacent armature teeth.

2. The electro-excited synchronous motor with a stator structure having multiple excitation teeth and multiple armature teeth according to claim 1, characterized in that, Both the exciting winding and the armature winding are non-overlapping windings. The exciting coils and the armature coils both adopt a concentrated winding method, and the winding directions of all the exciting coils are the same, and the winding directions of all the armature coils are the same.

3. The electric excitation synchronous motor with a stator structure having multiple excitation teeth and multiple armature teeth according to claim 1, characterized in that, Six exciting teeth and six armature teeth are respectively provided in the stator core.

4. The electric excitation synchronous motor with a stator structure having multiple excitation teeth and multiple armature teeth according to claim 3, characterized in that, There are three groups of exciting coils, and the mechanical angles between the exciting coils differ by 120°.

5. The electrically excited synchronous machine with a stator structure having multiple exciting teeth and multiple armature teeth according to claim 3 or 4, characterized in that, There are three groups of armature coils, forming an A-phase winding, a B-phase winding, and a C-phase winding. The mechanical angles between the armature coils of each phase differ by 120°.

6. The electro-excited synchronous motor with a stator structure having multiple exciting teeth and multiple armature teeth according to claim 3, characterized in that A plurality of permanent magnets are circumferentially provided in the stator core.

7. The electrically excited synchronous machine with a stator structure having multiple excitation teeth and multiple armature teeth according to claim 6, characterized in that, There are three permanent magnets circumferentially provided in the stator core, and each of the permanent magnets is respectively embedded in the exciting tooth yoke part of the V-shaped structure or the Y-shaped structure.

8. The electrically excited synchronous motor with a stator structure having multiple exciting teeth and multiple armature teeth according to claim 6, characterized in that, Six permanent magnets are circumferentially embedded in the stator core, and each of the permanent magnets is respectively embedded at the tooth tips of the exciting teeth.

9. The electric excitation synchronous motor with a stator structure having multiple excitation teeth and multiple armature teeth according to any one of claims 6 to 8, characterized in that, All the permanent magnets adopt a radial magnetization method, and the magnetization direction of the permanent magnets faces the inside of the motor.

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