Motor and controller integrated drive system
By integrating the motor and controller and adopting a hybrid rotor structure, the magnetic field distribution is optimized, solving the problems of high cost and large size of permanent magnet synchronous motors, and realizing a compact and efficient motor drive system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENHUA BAORIXILE ENERGY CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-12
AI Technical Summary
Existing permanent magnet synchronous motors have high manufacturing costs, and the separate motor and controller design results in a large system size, making them difficult to apply in space-constrained scenarios.
Design a motor and controller integrated drive system, which adopts a hybrid rotor including a synchronous reluctance rotor and a permanent magnet rotor. The controller and motor are integrated together. By optimizing the rotor structure and magnetic field distribution, the amount of magnets used and magnetic leakage are reduced.
It achieves a compact, low-cost, high torque density, high power factor, and high efficiency motor drive system, suitable for space-constrained scenarios.
Smart Images
Figure CN224355985U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of motor technology, and more specifically, to a motor and controller integrated drive system. Background Technology
[0002] Permanent magnet synchronous motors (PMSMs) possess significant advantages such as high torque density, high power factor, and high operating efficiency. However, the large number of magnets required on their rotors keeps their manufacturing costs high. Synchronous reluctance motors, on the other hand, have the advantages of simple rotor structure and low cost, but their lower power factor is a major drawback in their development.
[0003] Furthermore, in existing motor drive systems, the motor and controller are typically presented as two separate components. This separate design not only increases the complexity of the system but also results in a larger overall size of the motor drive system, which imposes numerous limitations in space-constrained applications.
[0004] Therefore, how to design a new type of permanent magnet motor that can have the characteristics of high torque density, high power factor and high efficiency, while effectively reducing manufacturing costs (compared to existing permanent magnet synchronous motors) and meeting the need to reduce the size of the motor drive system has become an urgent technical problem to be solved. Utility Model Content
[0005] To address at least one of the aforementioned technical problems, this application proposes an integrated motor and controller drive system.
[0006] In view of this, this application proposes an integrated drive system for a motor and controller, comprising: a drive motor, the drive motor including a motor end cover and a rotor assembly, the rotor assembly including a rotating shaft and a hybrid rotor mounted on the rotating shaft; a controller, the controller including a first housing, a second housing, a control module and a rotor position detection device; the first housing and the second housing are disposed on one side of the motor end cover and together with the motor end cover form an accommodating space, the control module and the rotor position detection device are both disposed within the accommodating space; the hybrid rotor includes a synchronous reluctance rotor segment and a permanent magnet rotor segment arranged axially along the rotating shaft, the synchronous reluctance rotor segment and the permanent magnet rotor segment having the same number of poles; the outer diameter r1 of the synchronous reluctance rotor segment is greater than the outer diameter r2 of the permanent magnet rotor segment, and satisfies 0.5 mm. <r1-r2<0.7mm。
[0007] In some feasible ways, the axial length h2 of the permanent magnet rotor segment is greater than the axial length h1 of the synchronous reluctance rotor segment, and satisfies 1.1 < (h2 ÷ h1) < 1.2.
[0008] In some feasible implementations, the synchronous reluctance rotor segment includes a first iron core and multiple layers of magnetic barriers distributed radially.
[0009] In some realizable ways, the permanent magnet rotor segment includes a second iron core and an embedded permanent magnet.
[0010] In some realizable ways, the radial width w1 of the magnetic barrier of the synchronous reluctance rotor segment is greater than the magnetization length w2 of the permanent magnet of the permanent magnet rotor segment, and 1.5 < (w1 ÷ w2) < 2 is satisfied.
[0011] In some realizable ways, a first groove is provided at the d-axis position on the outer circumference of the synchronous reluctance rotor segment, and a second groove is provided at the q-axis position on the outer circumference of the permanent magnet rotor segment; the circumferential arc angle of the first groove is θ1, and the circumferential arc angle of the second groove is θ2, and 1.13 < (θ2 ÷ θ1) < 1.24 is satisfied.
[0012] In some realizable ways, the rotor position detection device is arranged inside the first housing.
[0013] In some realizable ways, the rotor position detection device is a Hall sensor or an encoder, and the Hall sensor or the encoder is connected to the control module through a shielded cable.
[0014] In some realizable ways, the motor and controller integrated drive system further includes: a magnetic isolation ring, which is arranged between the synchronous reluctance rotor segment and the permanent magnet rotor segment.
[0015] In some realizable ways, the control module includes: a power device and a drive circuit, and the power device is connected to the first housing through thermal conductive silicone grease.
[0016] Compared with the related art, the present application has the following beneficial effects:
[0017] The motor and controller integrated drive system provided by the present application integrates the motor and the controller together, making the structure of the motor drive system more compact and the overall volume smaller. The rotor of the drive motor is a hybrid rotor, which includes a synchronous reluctance rotor and a permanent magnet rotor, making the permanent magnet motor have the advantages of high torque density, large power factor, high efficiency and lower cost compared with the existing permanent magnet synchronous motor.
[0018] The outer diameter r1 of the synchronous reluctance rotor segment is greater than the outer diameter r2 of the permanent magnet rotor segment, and 0.5 mm < r1 - r2 < 0.7 mm is satisfied, so that the synchronous reluctance rotor effectively absorbs the end leakage magnetic flux of the permanent magnet rotor and reduces the air-gap magnetic density harmonic.
[0019] The additional aspects and advantages of the present application will become obvious in the following description part, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:
[0021] Figure 1 An exploded view of a motor and controller integrated drive system according to one embodiment of this application is shown;
[0022] Figure 2 A schematic diagram of the structure of a hybrid rotor in one embodiment of this application is shown;
[0023] Figure 3 A schematic diagram of the structure of a synchronous reluctance rotor section in one embodiment of this application is shown;
[0024] Figure 4 A schematic diagram of the permanent magnet rotor segment in one embodiment of this application is shown.
[0025] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows:
[0026] 100 Drive motor, 120 First housing, 130 Second housing, 140 Rotary shaft, 150 Synchronous reluctance rotor section, 152 Magnetic barrier, 154 First iron core, 156 First groove, 160 Permanent magnet rotor section, 162 Magnet slot, 164 Second iron core, 166 Second groove, 170 Shaft hole. Detailed Implementation
[0027] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0028] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0029] The following reference Figures 1 to 4 This application describes a motor and controller integrated drive system according to some embodiments.
[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, the present application provides an integrated drive system of a motor and a controller, including: a drive motor 100, the drive motor 100 includes a motor end cover and a rotor assembly, the rotor assembly includes a rotating shaft 140 and a hybrid rotor mounted on the rotating shaft 140; a controller, the controller includes a first housing 120, a second housing 130, a control module and a rotor position detection device; the first housing 120 and the second housing 130 are arranged on one side of the motor end cover and jointly enclose a containing space, and both the control module and the rotor position detection device are arranged in the containing space; the hybrid rotor includes a synchronous reluctance rotor segment 150 and a permanent magnet rotor segment 160 arranged along the axial direction of the rotating shaft 140, and the number of poles of the synchronous reluctance rotor segment 150 and the permanent magnet rotor segment 160 is the same; the outer diameter r1 of the synchronous reluctance rotor segment 150 is greater than the outer diameter r2 of the permanent magnet rotor segment 160, and 0.5mm < r1 - r2 < 0.7mm is satisfied.
[0031] The integrated drive system of the motor and the controller provided by the present application includes a drive motor 100 and a controller. By integrating the drive motor 100 and the controller, the overall volume and weight of the system are reduced, the compactness and portability of the system are improved, and it is convenient for installation and maintenance.
[0032] The controller uses the first housing 120 and the second housing 130 to jointly enclose a containing space with the motor end cover, which not only protects the control module and the rotor position detection device, but also enhances the sealing performance and anti-interference ability of the system, and helps to improve the stability and reliability of the system. The rotor position detection device is used to detect the mechanical angle of the d-axis of the rotor magnetic field. Because the variable frequency control is essentially to decouple the rotating magnetic field generated by the three-phase ABC power into the static magnetic fields of the dq axes, after detecting the d-axis angle of the rotor magnetic field, the three-phase ABC power can be adjusted to make the stator dq static magnetic field and the rotor dq static magnetic field couple with each other.
[0033] The hybrid rotor includes a synchronous reluctance rotor segment 150 and a permanent magnet rotor segment 160, which not only has the high efficiency and high power factor characteristics of a synchronous reluctance motor, but also has the high torque density and wide speed regulation range of a permanent magnet motor. The hybrid rotor adopts the scheme of "permanent magnet rotor and synchronous reluctance rotor" combination. Compared with a pure permanent magnet motor, the use of rare earth permanent magnet materials can be reduced, and the cost can be lowered. The number of poles of the synchronous reluctance rotor segment 150 and the permanent magnet rotor segment 160 is the same, which helps to reduce the vibration and noise during the operation of the motor and improve the operation stability of the motor.
[0034] The outer diameter r1 of the synchronous reluctance rotor segment 150 is greater than the outer diameter r2 of the permanent magnet rotor segment 160, and 0.5mm < r1 - r2 < 0.7mm is satisfied, so that the synchronous reluctance rotor effectively absorbs the end leakage magnetic flux of the permanent magnet rotor and reduces the air-gap magnetic density harmonic. It helps to optimize the electromagnetic performance of the motor and improve the efficiency and power density of the motor.
[0035] The integrated motor and controller drive system provided in this application integrates the motor and controller together, resulting in a more compact structure and smaller overall size. The rotor of the drive motor 100 is a hybrid rotor, which includes a synchronous reluctance rotor and a permanent magnet rotor. This gives the permanent magnet motor advantages such as high torque density, high power factor, high efficiency, and lower cost compared to existing permanent magnet synchronous motors.
[0036] In some embodiments provided in this application, the axial length h2 of the permanent magnet rotor segment 160 is greater than the axial length h1 of the synchronous reluctance rotor segment 150, and satisfies 1.1 < (h2 ÷ h1) < 1.2.
[0037] In this embodiment, the larger the axial length h2 of the permanent magnet rotor section 160, the greater the torque and power factor of the motor, but the greater the amount of magnets used in the permanent magnet rotor. By reasonably optimizing the value of h2 / h1, the amount of magnets used in the permanent magnet rotor can be reduced while meeting the requirements of the motor's torque, power factor and other performance.
[0038] like Figure 3 As shown, in some embodiments provided in this application, the synchronous reluctance rotor segment 150 includes a first iron core 154 and a multilayer magnetic barrier 152 distributed radially.
[0039] In this embodiment, the synchronous reluctance rotor section 150 includes a first iron core 154 and multiple magnetic barriers 152. The multiple magnetic barriers 152 are radially distributed on the first iron core 154, effectively guiding the magnetic flux path, increasing reluctance torque, and improving the motor's output torque capability. Simultaneously, the magnetic barriers 152 optimize the internal magnetic field distribution of the motor, reduce leakage flux, and improve motor efficiency and power factor. The use of multiple magnetic barriers 152 helps reduce vibration and noise during motor operation, improving operational stability. Furthermore, a rationally designed magnetic barrier 152 structure can enhance the rotor's mechanical strength, enabling it to withstand greater electromagnetic forces, extending the motor's service life, and enhancing system reliability.
[0040] like Figure 4 As shown, in some embodiments provided in this application, the permanent magnet rotor section 160 includes a second iron core 164 and an embedded magnet.
[0041] In this embodiment, the permanent magnet rotor section 160 includes a second iron core 164 and built-in magnets. The built-in magnets are embedded in the second iron core 164, resulting in a compact structure and improved rotor space utilization. The built-in magnets enhance the motor's resistance to demagnetization, maintaining stable magnetic performance under complex operating conditions and improving motor reliability. Simultaneously, this structure allows for a more rational distribution of the air gap magnetic field, contributing to improved output torque and efficiency, reduced torque ripple, and smoother motor operation. Furthermore, the built-in magnets facilitate protection, reducing the impact of external factors on performance, extending motor lifespan, and lowering maintenance costs.
[0042] In some embodiments provided in this application, the radial width w1 of the magnetic barrier 152 of the synchronous reluctance rotor section 150 is greater than the magnetization length w2 of the magnet of the permanent magnet rotor section 160, and satisfies 1.5 < (w1 ÷ w2) < 2.
[0043] In this embodiment, w1 and w2 have different values, and the corresponding d-axis inductance L d The torque and efficiency of the motor can be increased by optimizing the values of w1 / w2, as the size of the magnets and the magnitude of the main magnetic flux generated by the magnets differ.
[0044] The synchronous reluctance rotor section 150 has a larger radial width w1 of magnetic barrier 152, which can more effectively hinder the transmission path of magnetic flux in the rotor core, making the magnetic flux more inclined to flow along the air gap between the stator and the rotor, thereby generating a larger reluctance torque.
[0045] A suitable ratio between the radial width w1 of the magnetic barrier 152 and the magnetization length w2 of the magnet helps optimize the magnetic field distribution inside the motor. This reduces additional losses caused by uneven magnetic field distribution, such as iron losses and stray losses. Simultaneously, the synergistic effect of reluctance torque and permanent magnet torque is more efficient, enabling the motor to maintain high operating efficiency under various operating conditions, reducing energy consumption and improving energy utilization.
[0046] In practical applications, the d-axis, or direct axis, is the axis that coincides with the direction of the rotor's permanent magnet flux linkage. In permanent magnet synchronous motors, the direction of the magnetic field generated by the permanent magnet is defined as the d-axis direction. For synchronous reluctance motors, although there are no permanent magnets, an axis corresponding to the direction of minimum rotor reluctance is usually defined as the d-axis. The q-axis, or quadrature axis, is the axis perpendicular to the d-axis. In the motor coordinate system, the q-axis and d-axis are orthogonal to each other, together forming a two-dimensional rotating coordinate system.
[0047] like Figure 3 and Figure 4 As shown, in some embodiments provided in this application, the outer circumference of the synchronous reluctance rotor section 150 is provided with a first groove 156 at the d-axis position, and the outer circumference of the permanent magnet rotor section 160 is provided with a second groove 166 at the q-axis position; the circumferential arc angle of the first groove 156 is θ1, the circumferential arc angle of the second groove 166 is θ2, and satisfies 1.13 < (θ2 ÷ θ1) < 1.24.
[0048] In this embodiment, a first groove 156 is provided at the d-axis position of the synchronous reluctance rotor segment 150, and a second groove 166 is provided at the q-axis position of the permanent magnet rotor segment 160. The placement of the first groove 156 and the second groove 166 alters the magnetic flux path within the motor, reducing localized concentration of magnetic flux in the rotor core and lowering iron losses. By adjusting the magnetic fields along the d-axis and q-axis, a better balance between the motor's active and reactive power is achieved, improving the power factor. This not only reduces reactive power losses in the power grid but also improves the overall energy efficiency of the motor system.
[0049] Optimizing the values of θ2 / θ1 can reduce the torque ripple of the motor. The specific ratio of θ2 to θ1 further optimizes the magnetic field distribution and current distribution, thereby improving the operating efficiency of the motor.
[0050] In some embodiments provided in this application, the rotor position detection device is disposed inside the first housing 120.
[0051] In this embodiment, the rotor position detection device is placed inside the first housing 120, which reduces external interference, accurately acquires rotor position information, provides a reliable basis for precise motor control, and improves motor operating accuracy. Integration within the first housing 120 optimizes the system's spatial layout, making the motor and controller integrated drive system more compact, facilitating installation and layout, and saving space. The first housing 120 provides protection for the rotor detection device, reducing its susceptibility to environmental factors (such as dust and moisture), ensuring stable operation, and extending its service life.
[0052] In some embodiments provided in this application, the rotor position detection device is a Hall sensor or an encoder, and the Hall sensor or encoder is connected to the control module via a shielded cable.
[0053] In this embodiment, the Hall sensor, based on the Hall effect, can quickly respond to changes in the rotor magnetic field and accurately detect the rotor position. The encoder, through its encoding principle, can provide high-resolution position signals. Both provide the control module with precise rotor position data, enabling the control module to accurately control the motor's operation based on the real-time rotor position, such as precisely adjusting parameters like motor speed and torque, thereby improving motor performance and stability.
[0054] Based on the detected rotor position information, the control module adjusts the motor's drive strategy in a timely manner, forming a highly efficient closed-loop control system. This helps the motor respond quickly to load changes, reduces overshoot and settling time, and improves the system's dynamic response performance.
[0055] Using shielded cables to connect Hall effect sensors or encoders to the control module effectively shields them from external electromagnetic interference. In complex electromagnetic environments, such as industrial production sites with numerous electrical devices, shielded cables prevent interference signals from mixing into the position detection signals, ensuring accurate transmission of position information to the control module. This avoids abnormal motor control due to signal interference and guarantees stable and reliable operation of the motor system.
[0056] In some embodiments provided in this application, the motor and controller integrated drive system further includes: a magnetic isolation ring disposed between the synchronous reluctance rotor section 150 and the permanent magnet rotor section 160.
[0057] In this embodiment, the synchronous reluctance rotor section 150 and the permanent magnet rotor section 160 have different magnetic field characteristics. A magnetic isolation ring is placed between them to effectively block the leakage magnetic flux between them. This avoids the magnetic field of the permanent magnet rotor section 160 from adversely affecting the magnetic field of the synchronous reluctance rotor section 150, ensuring that their respective magnetic fields are independent and stable, and improving the rationality of the motor's magnetic field distribution.
[0058] By reducing magnetic leakage, the synchronous reluctance rotor section 150 and the permanent magnet rotor section 160 can better leverage their respective torque-generating advantages, working synergistically to enhance the overall output torque of the motor. Simultaneously, the improved magnetic field distribution helps reduce torque ripple, resulting in smoother motor operation.
[0059] A reasonable magnetic field distribution reduces energy loss caused by magnetic leakage, making the motor more energy-efficient during operation, reducing energy consumption, and meeting energy-saving requirements.
[0060] In some embodiments provided in this application, the control module includes a power device and a drive circuit, wherein the power device is connected to the first housing 120 via thermal grease.
[0061] In this embodiment, the control module includes a power device and a drive circuit. The power device generates a significant amount of heat during operation; if this heat cannot be dissipated promptly, it will affect its performance and lifespan. Thermal grease connects the power device to the first housing 120. The thermal grease fills the tiny gaps between them, reducing thermal resistance and allowing the heat generated by the power device to be quickly conducted to the first housing 120. The first housing 120 typically has a large heat dissipation area, effectively dissipating heat into the surrounding environment, reducing the operating temperature of the power device, ensuring stable operation, and extending its service life.
[0062] Good heat dissipation performance can prevent power devices from degrading or being damaged due to overheating, reduce the failure rate of motor and controller integrated drive systems, improve the reliability and stability of the entire system, and reduce maintenance costs.
[0063] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in Figure 4 , in a specific embodiment, the present application provides an integrated drive system of a motor and a controller, including a drive motor 100 and a controller. The controller includes a first housing 120 and a second housing 130. The first housing 120 and the second housing 130 are fixed to an end cover on one side of the drive motor 100 by bolts. The first housing 120, the second housing 130, and the end cover on one side of the drive motor 100 jointly enclose an internal accommodation space of the controller. A rotor position detection device and a control module are arranged in the accommodation space. The rotor position detection device is fixed to the inner side of the first housing 120. The rotor of the drive motor 100 is a hybrid rotor; the hybrid rotor includes a synchronous reluctance rotor segment 150 and a permanent magnet rotor segment 160, and both the synchronous reluctance rotor segment 150 and the permanent magnet rotor segment 160 are fixed to the rotating shaft 140. The number of poles of the synchronous reluctance rotor is the same as that of the permanent magnet rotor. The outer diameter r1 of the synchronous reluctance rotor is greater than the outer diameter r2 of the permanent magnet rotor, and 0.5mm < r1 - r2 < 0.7mm. By optimizing the values of r1 and r2, the synchronous reluctance rotor can effectively absorb the end leakage magnetic flux of the permanent magnet rotor and reduce the air-gap magnetic density harmonic.
[0064] The axial length h2 of the permanent magnet rotor is greater than the axial length h1 of the synchronous reluctance rotor, and 1.1 < h2 / h1 < 1.2. The greater the axial length h2 of the permanent magnet rotor, the greater the torque and power factor of the motor. However, the amount of magnetic steel used for the permanent magnet rotor is also greater. By reasonably optimizing the value of h2 / h1, the amount of magnetic steel used for the permanent magnet rotor can be reduced on the premise that the performance of the motor such as torque and power factor meets the requirements.
[0065] The radial width w1 of the magnetic barrier 152 of the synchronous reluctance rotor is greater than the magnetization length w2 of the magnetic steel of the permanent magnet rotor, and 1.5 < w1 / w2 < 2. With different values of w1 and w2, correspondingly, the magnitude of the d-axis inductance L d is different and the magnitude of the main magnetic flux generated by the magnetic steel is different. By optimizing the value of w1 / w2, the torque and efficiency of the motor can be increased.
[0066] The synchronous reluctance rotor includes a first iron core 154. Multiple magnetic barriers 152 are arranged on the first iron core 154. A first groove 156 is arranged at a position corresponding to the d-axis on the outer circumference of the synchronous reluctance rotor. The permanent magnet rotor includes a second iron core 164. A magnetic steel groove 162 is arranged on the second iron core 164. A second groove 166 is arranged at a position corresponding to the q-axis on the outer circumference of the permanent magnet rotor; shaft holes 170 are arranged at the centers of both the first iron core 154 and the second iron core 164. The circumferential arc angle of the first groove 156 is θ1, and the circumferential arc angle of the second groove 166 is θ2, and 1.13 < θ2 / θ1 < 1.24. By optimizing the value of θ2 / θ1, the torque ripple of the motor can be reduced.
[0067] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0068] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0069] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A motor and controller integrated drive system, characterized in that, include: A drive motor, the drive motor including a motor end cover and a rotor assembly, the rotor assembly including a rotating shaft and a hybrid rotor mounted on the rotating shaft; The controller includes a first housing, a second housing, a control module, and a rotor position detection device; the first housing and the second housing are disposed on one side of the motor end cover and together with the motor end cover form an accommodating space, and the control module and the rotor position detection device are both disposed within the accommodating space; The hybrid rotor includes a synchronous reluctance rotor segment and a permanent magnet rotor segment arranged axially along the shaft, wherein the synchronous reluctance rotor segment and the permanent magnet rotor segment have the same number of poles; the outer diameter r1 of the synchronous reluctance rotor segment is larger than the outer diameter r2 of the permanent magnet rotor segment, and satisfies a difference of 0.5 mm. <r1-r2<0.7mm。 2. The integrated motor and controller drive system according to claim 1, characterized in that, The axial length h2 of the permanent magnet rotor segment is greater than the axial length h1 of the synchronous reluctance rotor segment, and satisfies 1.1 < (h2 ÷ h1) < 1.
2.
3. The integrated motor and controller drive system according to claim 1, characterized in that, The synchronous reluctance rotor section includes a first iron core and multiple layers of magnetic barriers distributed radially.
4. The integrated motor and controller drive system according to claim 3, characterized in that, The permanent magnet rotor section includes a second iron core and built-in magnets.
5. The integrated motor and controller drive system according to claim 4, characterized in that, The radial width w1 of the magnetic barrier of the synchronous reluctance rotor section is greater than the magnetization length w2 of the magnet of the permanent magnet rotor section, and satisfies 1.5 < (w1 ÷ w2) < 2.
6. The integrated motor and controller drive system according to claim 1, characterized in that, The outer circumference of the synchronous reluctance rotor section has a first groove at the d-axis position, and the outer circumference of the permanent magnet rotor section has a second groove at the q-axis position; the circumferential arc angle of the first groove is θ1, the circumferential arc angle of the second groove is θ2, and satisfies 1.13<(θ2÷θ1)<1.
24.
7. The motor and controller integrated drive system according to any one of claims 1 to 6, characterized in that, The rotor position detection device is located inside the first housing.
8. The integrated motor and controller drive system according to claim 7, characterized in that, The rotor position detection device is a Hall sensor or an encoder, and the Hall sensor or encoder is connected to the control module via a shielded cable.
9. The motor and controller integrated drive system according to any one of claims 1 to 6, characterized in that, Also includes: A magnetic isolation ring is disposed between the synchronous reluctance rotor section and the permanent magnet rotor section.
10. The motor and controller integrated drive system according to any one of claims 1 to 6, characterized in that, The control module includes a power device and a drive circuit, wherein the power device is connected to the first housing via thermal grease.