Three-phase permanent magnet generator stator core, stator, three-phase permanent magnet generator and DC charging generator set

Abstract

This application discloses a three-phase permanent magnet generator stator core, a stator, a three-phase permanent magnet generator, and a DC charging generator set. The three-phase permanent magnet generator stator core includes a cylindrical core body. 3n stator teeth are spaced apart on the inner / outer circumferential surfaces of the core body. These 3n stator teeth are evenly divided into at least two groups of three-phase teeth. The central angle between any two adjacent stator teeth in each group of three-phase teeth is equal and γ. In any two adjacent groups of three-phase teeth, the stator tooth in the first group closest to the second group is denoted as A1, and the stator tooth in the second group closest to the first group is denoted as B1. The central angle between A1 and B1 is defined as the central angle between the three-phase tooth groups, and the central angle between the three-phase tooth groups is not equal to γ. This application can significantly reduce the interval time between adjacent peaks after parallel rectification of each group of three-phase outputs without increasing the speed or the number of pole pairs, thereby significantly reducing the ripple after rectification.

Description

Technical Field

[0001] This application belongs to the field of generator technology, and particularly relates to a three-phase permanent magnet generator stator core, stator, three-phase permanent magnet generator and DC charging generator set. Background Technology

[0002] Currently, the number of stator teeth and the number of magnetic poles in the stator core of a three-phase permanent magnet generator are set in a 3:2 ratio. The stator teeth are evenly distributed on the stator core. A set of UVW three-phase outputs is composed of a multiple of 3 stator teeth. The phase difference of the three-phase outputs is 120°. The peak spacing (time period) between two adjacent sets of three-phase outputs after rectification is large, resulting in large ripple after rectification.

[0003] To increase output power, it is usually necessary to set up two or three or more sets of three-phase windings and connect them in parallel. Since the stator teeth are evenly distributed on the stator core (the central angle between any two adjacent stator teeth is set as γ, then γ = 360 / 3n, where n is the number of rotor magnetic pole pairs of the three-phase permanent magnet generator), the central angle between two adjacent stator teeth of two adjacent sets of three-phase windings (i.e., the central angle between three-phase tooth groups) is also constant, that is, the central angle between three-phase tooth groups is 360 / 3n. Therefore, the spacing between adjacent peaks of the parallel output voltage after rectification of each set of three-phase windings will not be improved, and therefore the ripple will not be improved either.

[0004] In existing technologies, to reduce the adjacent peak ripple of the voltage obtained by parallel connection of the three-phase output rectifiers, one must either increase the rotational speed or increase the number of rotor magnet pole pairs.

[0005] Therefore, how to significantly reduce the time interval between adjacent peaks of the parallel output voltage obtained by rectifying and connecting the three-phase outputs of a three-phase permanent magnet generator without increasing the number of rotor magnet pole pairs or increasing the rotational speed, thereby significantly reducing the ripple after rectification, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this application is to provide a stator core, stator, three-phase permanent magnet generator, and DC charging generator set. By staggering any two adjacent sets of three-phase teeth by a certain angle, the time interval between adjacent peaks after the three-phase output rectifiers are connected in parallel can be significantly reduced without increasing the speed or the number of pole pairs, thereby significantly reducing the ripple after rectification.

[0007] To achieve the above objectives, this application provides the following solution:

[0008] According to the first aspect of this application, this application provides a stator core for a three-phase permanent magnet generator, including a cylindrical core body, wherein 3n stator teeth are spaced apart on the inner / outer circumferential surface of the core body, where n is the number of rotor magnetic pole pairs of the three-phase permanent magnet generator, and n is a positive integer greater than or equal to 2.

[0009] The 3n stator teeth are divided into at least two groups of three-phase teeth, and the number of stator teeth in each group of three-phase teeth is an integer multiple of 3. The at least two groups of three-phase teeth are arranged circumferentially along the main body of the iron core. The central angle between any two adjacent stator teeth in each group of three-phase teeth is equal and is γ, where γ = 360 / 3n. In any two adjacent groups of three-phase teeth, the stator tooth in the first group of three-phase teeth that is closest to the stator tooth in the second group of three-phase teeth is denoted as A1, and the stator tooth in the second group of three-phase teeth that is closest to the stator tooth in the first group of three-phase teeth is denoted as B1. The central angle between A1 and B1 is defined as the central angle between the three-phase tooth groups, and the central angle between the three-phase tooth groups is not equal to γ.

[0010] Preferably, when the 3n stator teeth are divided into at least 3 groups of three-phase teeth, the central angles between any two adjacent groups of three-phase teeth are not equal.

[0011] Preferably, the central angle between the three-phase tooth groups is determined by the required three-phase output phase lag angle φ, wherein the three-phase output phase lag angle φ is the phase lag angle of the output voltage of the in-phase winding on the two sets of three-phase teeth.

[0012] Preferably, each group of three-phase teeth includes multiple three-phase stator tooth units, and each of the three-phase stator tooth units includes three stator teeth.

[0013] According to a second aspect of this application, this application provides a three-phase permanent magnet generator stator, including the three-phase permanent magnet generator stator core as described in any of the first aspects above and coils wound on each of the stator teeth.

[0014] According to a third aspect of this application, this application provides a three-phase permanent magnet generator, including a rotor, the rotor including a cylindrical rotor body, n S poles and n N poles of magnetic tiles, the S poles and N poles of the magnetic tiles being uniformly and alternately arranged on the outer peripheral surface of the rotor body, adjacent S poles and N poles of the magnetic tiles forming a magnetic tile pole pair, and also including the three-phase permanent magnet generator stator described in the second aspect above, the stator teeth of the stator being arranged opposite to the S poles / N poles of the rotor.

[0015] Preferably, the three-phase permanent magnet generator is an external rotor generator.

[0016] According to a fourth aspect of this application, this application provides a DC charging generator set, including an engine and a rectifier module, and further including a three-phase permanent magnet generator as described in any of the third aspects above, wherein the engine is driven connected to the three-phase permanent magnet generator, and the power output terminal of the three-phase permanent magnet generator is connected to the power input terminal of the rectifier module.

[0017] Due to the adoption of the above technical solution, this application has the following beneficial effects:

[0018] This application sets the central angle between any two adjacent sets of three-phase teeth to be different from the central angle γ between any two adjacent stator teeth in each set of three-phase teeth. This means that any two adjacent sets of three-phase teeth are staggered by a certain angle based on the existing technology. This can significantly reduce the time interval between adjacent peaks after the three-phase output is rectified and connected in parallel without increasing the speed or the number of pole pairs, thereby significantly reducing the ripple after rectification.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale. Obviously, the drawings described below are merely some embodiments of this application; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the stator and rotor of an existing three-phase permanent magnet generator.

[0022] Figure 2 This is a schematic diagram of the structure of an existing three-phase permanent magnet generator stator;

[0023] Figure 3 This is the U1\V1\W1 three-phase waveform diagram of an existing three-phase permanent magnet generator;

[0024] Figure 4 This is the U2\V2\W2 three-phase waveform diagram of an existing three-phase permanent magnet generator;

[0025] Figure 5 This is a waveform diagram of two sets of three-phase output rectified parallel connection of an existing three-phase permanent magnet generator;

[0026] Figure 6This is a schematic diagram of the stator and rotor of a three-phase permanent magnet generator in one embodiment of this application;

[0027] Figure 7 This is a schematic diagram of the structure of a three-phase permanent magnet generator stator in one embodiment of this application;

[0028] Figure 8 This is a three-phase waveform diagram of U1\V1\W1 of a three-phase permanent magnet generator in one embodiment of this application;

[0029] Figure 9 This is a three-phase waveform diagram of U2\V2\W2 of a three-phase permanent magnet generator in one embodiment of this application;

[0030] Figure 10 This is a waveform diagram of two sets of three-phase output rectified parallel connections of a three-phase permanent magnet generator in one embodiment of this application. Detailed Implementation

[0031] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0032] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined.

[0033] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0034] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] like Figure 6 , Figure 7 As shown, this application embodiment provides a three-phase permanent magnet generator stator core 11, including a cylindrical core body 111, with 3n stator teeth 112 spaced apart on the outer circumferential surface of the core body 111, where n is the number of rotor magnetic pole pairs of the three-phase permanent magnet generator, and n is a positive integer greater than or equal to 2.

[0036] The 3n stator teeth 112 are divided into at least two groups of three-phase teeth. The number of stator teeth 112 in each group of three-phase teeth is an integer multiple of 3. The at least two groups of three-phase teeth are arranged circumferentially along the iron core body 111. The central angle between two adjacent stator teeth 112 in each group of three-phase teeth is equal and is γ, where γ = 360 / 3n.

[0037] In any two adjacent sets of three-phase teeth, the stator tooth 112 in the first set of three-phase teeth that is closest to the stator tooth 112 in the second set of three-phase teeth is denoted as A1, and the stator tooth 112 in the second set of three-phase teeth that is closest to the stator tooth 112 in the first set of three-phase teeth is denoted as B1. The central angle between A1 and B1 is defined as the central angle between the three-phase tooth sets, and the central angle between the three-phase tooth sets is not equal to γ.

[0038] Specifically, in this embodiment, the three-phase permanent magnet generator stator core 11 is applied to a three-phase permanent magnet generator with an external rotor. If the three-phase permanent magnet generator stator core 11 is applied to a three-phase permanent magnet generator with an internal rotor, then 3n stator teeth 112 are spaced apart on the inner circumferential surface of the core body 111.

[0039] The working principle and advantages of this application are explained below using the stator core 11 of a three-phase permanent magnet generator with an external rotor having two sets of three-phase teeth as an example:

[0040] 1. Existing three-phase permanent magnet generator stator core 11 scheme:

[0041] like Figure 1 , Figure 2 As shown, in the existing three-phase permanent magnet generator stator core 11 with two sets of three-phase teeth, each stator tooth 112 is evenly distributed on the outer circumferential surface of the core body 111. Therefore, the central angle between two adjacent stator teeth 112 of the two sets of three-phase windings (i.e., the central angle between three-phase tooth sets) is also constant, that is, the central angle between three-phase tooth sets is equal to the central angle between any two adjacent stator teeth 112 in the same set of three-phase teeth.

[0042] Let the number of rotor magnet pole pairs be n;

[0043] Then the number of stator teeth 112 is n*3, the number of winding 1 teeth is n*3 / 2, and the number of winding 2 teeth is n*3 / 2;

[0044] The central angle γ between two adjacent stator teeth 112 in the same winding is 360 / (n*3);

[0045] The central angle α between U(V\W) and the next U(V\W) tooth is 360 / n;

[0046] The central angle β = α = 360 / n between two adjacent teeth of phase U1 and U2;

[0047] The three-phase waveforms of U1, V1, and W1 (winding 1) are as follows: Figure 3 As shown, the spacing between two adjacent peaks is 2π / 3;

[0048] The three-phase waveforms of U2, V2, and W2 (winding 2) are as follows: Figure 4 As shown, the spacing between two adjacent peaks is 2π / 3;

[0049] Because U1\V1\W1 and U2\V2\W2 are completely uniformly distributed, the three-phase waveforms of U1\V1\W1 are completely identical to those of U2\V2\W2. Therefore, the parallel waveforms of the two sets of three-phase output rectified circuits are as follows: Figure 5 As shown, the distance between two adjacent wave crests (time period) is π / 3.

[0050] Let Ur be the effective value of the ripple voltage after rectification;

[0051] Ud is the peak voltage after rectification;

[0052] U2 is the effective value of a single-phase voltage;

[0053] m represents the number of wave peaks in the rectified cycle; for three-phase half-wave rectification, it is 3, and for three-phase full-wave rectification, it is 6.

[0054] Ripple coefficient δ=Ur / Ud=2 / (m2-1);

[0055] Because the two sets of three-phase outputs are in phase after rectification, m = 6;

[0056] The ripple factor δ = Ur / Ud = 2 / (m²-1) = 5.71%.

[0057] 2. The stator core 11 scheme of the three-phase permanent magnet generator in this application:

[0058] like Figure 6 , Figure 7 As shown, the stator core 11 of the three-phase permanent magnet generator with two sets of three-phase teeth in this application has each stator tooth 112 of one set of three-phase teeth evenly distributed on the outer circumference of the core body 111. However, the central angle between two adjacent stator teeth 112 of the two sets of three-phase windings (i.e., the central angle between the three-phase tooth sets) is increased or decreased by a certain central angle θ on the existing basis. That is, the stator cores U1\V1\W1 and U2\V2\W2 are not evenly distributed and are staggered by a certain central angle θ.

[0059] Similarly, let the number of pole pairs of the rotor magnetic tile be n;

[0060] Then the number of stator teeth 112 is n*3, the number of winding 1 teeth is n*3 / 2, and the number of winding 2 teeth is n*3 / 2;

[0061] The central angle γ between two adjacent stator teeth 112 in the same winding is 360 / (n*3);

[0062] The central angle α between U(V\W) and the next U(V\W) tooth is 360 / n;

[0063] To make the output phase of U1(V1\W1) and U2(V2\W2) lag by φ, the teeth of U1(V1\W1) and U2(V1\W1) need to be offset by a certain mechanical angle θ = (360 / n) / 360*φ.

[0064] The central angle β = α ± θ between two adjacent teeth of phase U1 and U2;

[0065] The three-phase waveforms of U1, V1, and W1 (winding 1) are as follows: Figure 8 As shown, the spacing between two adjacent peaks is 2π / 3;

[0066] The three-phase waveforms of U2, V2, and W2 (winding 2) are as follows: Figure 9 As shown, the spacing between two adjacent peaks is 2π / 3;

[0067] Because U1\V1\W1 and U2\V2\W2 are not uniformly distributed, there is a phase difference φ between the three-phase waveforms of U1\V1\W1 and U2\V2\W2. Therefore, the two sets of three-phase rectified waveforms are connected in parallel. Figure 10 As shown, the distance between two adjacent wave crests (time period) is (π / 3)-φ.

[0068] In summary, by offsetting each set of three-phase teeth by a certain angle, the time interval between adjacent peaks after two sets of three-phase output rectifiers are connected in parallel can be significantly reduced without increasing the rotational speed or the number of pole pairs. Similarly, the more three-phase windings (the more sets of three-phase teeth), and the more offset each winding is, the smaller the time interval between adjacent peaks after parallel rectifier connection will be.

[0069] Because the phases of the two sets of three-phase outputs are staggered after rectification in this embodiment, m = 12;

[0070] Then the ripple factor δ=Ur / Ud=2 / (m2-1)=1.4%;

[0071] In summary, using two sets of three-phase output rectifiers with staggered phases in a three-phase permanent magnet generator significantly reduces the ripple coefficient after parallel rectification. Similarly, the more staggered the phases of the three-phase output rectifiers in a three-phase permanent magnet generator, the smaller the ripple after parallel rectification. This can achieve the voltage regulation accuracy required for direct battery charging.

[0072] In summary, in this embodiment, by setting the central angle between any two adjacent sets of three-phase teeth to be different from the central angle γ between any two adjacent stator teeth 112 of each set of three-phase teeth, that is, by shifting any two adjacent sets of three-phase teeth by a certain angle based on the existing technology, the time interval between adjacent peaks after the three-phase output rectification is significantly reduced without increasing the rotational speed or the number of pole pairs, thereby significantly reducing the ripple after rectification.

[0073] In one embodiment, when the 3n stator teeth 112 are divided into at least 3 groups of three-phase teeth, the central angles between any two adjacent groups of three-phase teeth are not equal.

[0074] In one embodiment, the central angle between the three-phase tooth groups is determined by the required three-phase output phase lag angle φ, where the three-phase output phase lag angle φ is the phase lag angle of the output voltage of the in-phase windings on the two sets of three-phase teeth.

[0075] In one embodiment, each group of three-phase teeth includes multiple three-phase stator tooth units 123, and each three-phase stator tooth unit 123 includes three stator teeth 112. By arranging multiple three-phase stator tooth units 123 in each group of three-phase teeth, multiple three-phase stator tooth units 123 in the same group can be connected in series, thereby obtaining a larger output voltage and improving the applicability of the three-phase permanent magnet generator. Specifically, as... Figure 6 , Figure 7 As shown, each group of three-phase teeth includes four three-phase stator tooth units 123, that is, each group of three-phase teeth has a total of 12 stator teeth 112 evenly spaced.

[0076] like Figure 7 As shown, this application also provides a three-phase permanent magnet generator stator 1, including the three-phase permanent magnet generator stator core 11 of any of the above embodiments and coils 12 wound on each stator tooth 112. The three-phase permanent magnet generator using the three-phase permanent magnet generator stator 1 in this embodiment can significantly reduce the interval time between adjacent peaks after the three-phase output rectified parallel connection of each group without increasing the speed or the number of pole pairs, thereby significantly reducing the ripple after rectification.

[0077] like Figure 6As shown, this application provides a three-phase permanent magnet generator, including a rotor 2. The rotor 2 includes a cylindrical rotor body 21, n S-pole magnets 22 and n N-pole magnets 23. The S-pole magnets 22 and N-pole magnets 23 are evenly and alternately arranged on the outer circumferential surface of the rotor body 21. Adjacent S-pole magnets 22 and N-pole magnets 23 form a magnet pole pair. The application also includes a three-phase permanent magnet generator stator 1 as described in the above embodiment, with stator teeth 112 facing the S-pole magnets 22 / N-pole magnets 23 of the rotor 2. The three-phase permanent magnet generator in this embodiment can significantly reduce the interval time between adjacent peaks after rectification and parallel connection of each group of three-phase outputs without increasing the speed or the number of pole pairs, thereby significantly reducing the ripple after rectification.

[0078] In one embodiment, such as Figure 6 As shown, this three-phase permanent magnet generator is an external rotor generator.

[0079] This application provides a DC charging generator set, including an engine and a rectifier module, and further including a three-phase permanent magnet generator as described in any of the above embodiments. The engine is driven and connected to the three-phase permanent magnet generator, and the power output terminal of the three-phase permanent magnet generator is connected to the power input terminal of the rectifier module. The DC charging generator set in this embodiment can significantly reduce the interval time between adjacent peaks after rectification and parallel connection without increasing the speed or number of pole pairs, thereby significantly reducing the ripple after rectification and achieving the voltage regulation accuracy level required for direct battery charging.

[0080] In existing technologies, DC generator sets used for battery charging require the voltage output from a three-phase permanent magnet generator to be rectified by a rectifier module before being input to a DC-DC module for high-precision voltage regulation and current limiting before charging the battery. However, the DC charging generator set in this embodiment uses any of the three-phase permanent magnet generators described in the above embodiments. Since the voltage ripple of the output voltage of this three-phase permanent magnet generator is significantly reduced after rectification by the rectifier module, it can achieve the voltage regulation accuracy level for direct battery charging. Therefore, the output voltage of the DC charging generator set in this embodiment does not need to undergo high-precision voltage regulation and current limiting by a DC-DC module after rectification, thus eliminating the need for the expensive DC-DC module and greatly reducing the manufacturing cost of the DC charging generator set.

[0081] It should be noted that the DC charging generator set in this embodiment differs from the existing DC charging generator set only in the arrangement of the stator 1 on the stator teeth 11. Everything else is the same as the prior art. Since the DC charging generator set is existing technology, its specific structure and working principle will not be described in detail here.

[0082] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application.

Claims

1. A stator core for a three-phase permanent magnet generator, comprising a cylindrical core body, wherein 3n stator teeth are spaced apart on the inner / outer circumferential surface of the core body, where n is the number of rotor magnetic pole pairs of the three-phase permanent magnet generator, and n is a positive integer greater than or equal to 2; the 3n stator teeth are evenly divided into at least two groups of three-phase teeth, the number of stator teeth in each group of three-phase teeth is an integer multiple of 3; the at least two groups of three-phase teeth are arranged circumferentially along the core body, and the central angle between two adjacent stator teeth in each group of three-phase teeth is equal and γ, where γ = 360 / 3n; characterized in that: In any two adjacent sets of three-phase teeth, the stator tooth in the first set of three-phase teeth that is closest to the stator tooth in the second set of three-phase teeth is denoted as A1, and the stator tooth in the second set of three-phase teeth that is closest to the stator tooth in the first set of three-phase teeth is denoted as B1. The central angle between A1 and B1 is defined as the central angle between the three-phase tooth sets. The central angle between the three-phase tooth sets is not equal to γ, so that the phases of multiple sets of three-phase outputs are staggered, reducing the time interval between adjacent peaks after the rectification of each set of three-phase outputs in parallel, thereby reducing the ripple after rectification. When the 3n stator teeth are divided into at least 3 groups of three-phase teeth, the central angles between any two adjacent groups of three-phase teeth are not equal. The central angle between the three-phase tooth groups is determined by the required three-phase output phase lag angle φ, wherein the three-phase output phase lag angle φ is the phase lag angle of the output voltage of the in-phase winding on the two sets of three-phase teeth.

2. The stator core of the three-phase permanent magnet generator according to claim 1, characterized in that, Each set of three-phase teeth includes multiple three-phase stator tooth units, and each of the three-phase stator tooth units includes three stator teeth.

3. A stator for a three-phase permanent magnet generator, characterized in that, It includes the stator core of a three-phase permanent magnet generator as described in any one of claims 1-2 and coils wound on each of the stator teeth.

4. A three-phase permanent magnet generator, comprising a rotor, the rotor comprising a cylindrical rotor body, n S-pole magnets and n N-pole magnets, the S-pole magnets and N-pole magnets being uniformly and alternately arranged on the outer circumferential surface of the rotor body, adjacent S-pole magnets and N-pole magnets forming a magnet pole pair, characterized in that, It also includes the three-phase permanent magnet generator stator as described in claim 3, wherein the stator teeth of the stator are arranged opposite to the S pole / N pole of the rotor's magnet.

5. The three-phase permanent magnet generator according to claim 4, characterized in that, The three-phase permanent magnet generator is an external rotor generator.

6. A DC charging generator set, comprising an engine and a rectifier module, characterized in that, It also includes the three-phase permanent magnet generator as described in claim 4 or 5, wherein the engine is driven and connected to the three-phase permanent magnet generator, and the power output terminal of the three-phase permanent magnet generator is connected to the power input terminal of the rectifier module.

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