A magnetic torque joint regulation hybrid excitation motor
By introducing magnetic permeable materials and magnetic regulating coils of the outer claw pole and the inner claw pole into the motor, using their magnetic field interaction, the shortcomings of traditional permanent magnet motors and hybrid excitation motors in regulating the magnetic field and torque are solved, and the problem of the lack of the magnetic field and torque of the traditional permanent magnet motors and hybrid excitation motors is achieved. Flexible adjustment of magnetic field and torque improves the operating performance of the motor.
Patent Information
- Application Number
- CN202210463444.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-04-29
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2042-04-29
AI Technical Summary
It is difficult for traditional permanent magnet motors to adjust the magnetic field under different operating conditions, especially during the process of rising from low speed to high speed, resulting in a decrease in the output torque, and the hybrid excitation motor has the problem of insufficient output torque when adjusting the magnetic field.
A magnetic moment coupled-modulation hybrid excitation motor is designed, using magnetic permeable materials of the outer claw pole and the inner claw pole to generate adjustable AC current through the magnet regulating coil, and stator end winding, permanent magnet leakage and magnet regulating coil The magnetic field interacts with each other to achieve the regulation of the magnetic field and torque. The relative positions of the outer claw poles and the inner claw poles and the current direction of the magnetizing coil ensure the enhancement or reduction of the magnetic field and torque.
It realizes flexible adjustment of the motor magnetic field and torque under different operating conditions, enhances electromagnetic torque, and ensures the efficient operation performance of the motor at different speeds.
Smart Images
Figure CN114884298B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of motors, and in particular to a magnetic-torque combined-regulation hybrid excitation motor capable of regulating both magnetic field and torque. Background Art
[0002] Permanent magnet motors have the characteristics of smaller size, lighter weight, and higher power density, and are widely used in various fields. Due to the characteristics of the permanent magnet magnetic field, it is very difficult to adjust the magnetic field inside the traditional permanent magnet motor. However, when facing different operating conditions, the permanent magnet motor needs to adjust the motor magnetic field to keep the motor in good operating performance. Although ordinary hybrid excitation motors can adjust the motor magnetic field, they have some disadvantages, especially when the motor is weakened during the process of rising from low speed to high speed, the output torque of the motor will be reduced. Summary of the invention
[0003] The object of the present invention is to provide a magnetic-torque combined-adjustment hybrid excitation motor capable of adjusting both magnetic field and torque.
[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:
[0005] A magnetic moment co-modulation hybrid excitation motor comprises a stator core, a stator end winding, a rotor core, a permanent magnet, a rotating shaft and an end cover, wherein the stator core, the stator end winding and the end cover form a stator, and the rotor core, the permanent magnet and the rotating shaft form a rotor, and further comprises an outer claw pole fixed to the rotor core, the outer claw pole being located in the axial direction of the rotor core and close to the outer side of the permanent magnet, the outer claw pole extending outward in the axial direction in the shape of the stator end winding and close to the stator end winding, and the outer claw pole rotating together with the rotor when the motor is running;
[0006] It also includes an inner claw pole, which is located axially outside the permanent magnet and does not contact the permanent magnet. The shape of the inner claw pole is adapted to the outer claw pole and is arranged close to the inner side of the outer claw pole. Two opposite inner claw poles are connected through the core of the magnetic adjustment coil and are fixed on the end cover and do not rotate with the rotor.
[0007] A magnetic tuning coil is arranged on the magnetic tuning coil core. The current passed through the magnetic tuning coil is alternating current, and the current size and direction of the alternating current are adjustable.
[0008] The sizes of the inner claw pole and the outer claw pole satisfy the following conditions: the outer claw pole is divided into an N-pole outer claw pole and an S-pole outer claw pole, and the inner claw pole is divided into an N-pole inner claw pole and an S-pole inner claw pole. When the rotor rotates counterclockwise so that the N-pole outer claw pole approaches the S-pole inner claw pole, the S-pole outer claw pole just moves away from the S-pole inner claw pole. When the N-pole outer claw pole begins to move away from the S-pole inner claw pole, the direction of the magnetic tuning coil current is adjusted so that the polarity of the S-pole inner claw is opposite.
[0009] The outer claw pole and the inner claw pole are both made of magnetic conductive materials.
[0010] The stator end windings are in a trumpet-like shape.
[0011] The magnetic adjustment coil core and the end cover are connected via a magnetic isolation block.
[0012] The magnetic tuning coil core is provided with a through hole for the rotating shaft to pass through.
[0013] The beneficial effects of the present invention are:
[0014] The present invention utilizes the interaction and coupling between the magnetic field of the motor stator end winding, the permanent magnet leakage magnetic field and the magnetic field of the magnetic field adjustment coil to achieve the purpose of both magnetic field adjustment and torque adjustment. Specifically:
[0015] (1) When the motor is running, the internal winding of the stator core will generate a rotating magnetic field that interacts with the permanent magnet, generating a torque to rotate the rotor. The stator end windings of the motor will also generate a rotating magnetic field, which is the same as the magnetic field generated by the internal windings of the stator core. The outer claw pole will have leakage magnetic flux from the permanent magnet passing outside the permanent magnet, generating a magnetic field on the outer claw pole in the same direction as the permanent magnet. This magnetic field interacts with the magnetic field generated by the stator end windings, generating a torque, and this torque is in the same direction as the motor's electromagnetic torque, which plays a role in enhancing the electromagnetic torque.
[0016] (2) There will be a magnetic field generated by the magnetic adjustment coil on the inner claw pole, and the size and direction of the magnetic field can be adjusted (the current passed through the magnetic adjustment coil is alternating current, the size and direction of the alternating current are adjustable, and the size and direction of the magnetic field can be adjusted). When the magnetic fields of the inner claw pole and the outer claw pole are in the same direction, the outer claw pole will attract each other as it rotates with the rotor and approaches the inner claw pole. At this time, a torque in the same direction as the electromagnetic torque will be generated, which will increase the electromagnetic torque. When the outer claw pole rotates away from the inner claw pole, the direction of the magnetic field of the inner claw pole is adjusted to the opposite direction. At this time, the magnetic fields of the two have the same direction and repel each other, which also increases the electromagnetic torque.
[0017] (3) The magnetic field of the outer claw pole is composed of the leakage magnetic field of the permanent magnet and the magnetic field generated by the magnetic field adjustment coil. When the direction of the magnetic field generated by the magnetic field adjustment coil is the same as the direction of the leakage magnetic field of the permanent magnet, the leakage magnetic field of the permanent magnet is promoted to increase the leakage magnetic field and the main magnetic flux of the motor is reduced; when the direction of the magnetic field generated by the magnetic field adjustment coil is opposite to the direction of the leakage magnetic field of the permanent magnet, the leakage magnetic field of the permanent magnet will be suppressed to increase the main magnetic flux of the motor, and when the magnetic field generated by the magnetic field adjustment coil is greater than the leakage magnetic field of the permanent magnet, the main magnetic flux of the motor will be directly increased. Therefore, adjusting the size and direction of the magnetic field generated by the magnetic field adjustment coil can play a role in adjusting the magnetic field of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the present invention;
[0019] Figure 2It is a schematic diagram of the rotor core part in the present invention;
[0020] Figure 3 is a schematic diagram of an outer claw pole and an inner claw pole in the present invention;
[0021] Figure 4 A schematic diagram of the size coordination of the outer claw pole and the inner claw pole in the present invention;
[0022] Figure 5 It is a schematic diagram of the cooperation between the rotor and the stator in the present invention;
[0023] Figure 6 It is a schematic diagram of the principle of the present invention;
[0024] Figure 7 for Figure 6 Schematic diagram with surface A as the cross-section surface.
[0025] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Figure 6 The arrows in the figure indicate the direction of the magnetic field.
[0027] like Figures 1 to 5 As shown, this embodiment takes a two-pole motor as an example for detailed description.
[0028] The present embodiment discloses a magnetic torque co-modulation hybrid excitation motor, comprising a stator core 8, a stator end winding 7, a rotor core 1, a permanent magnet 2, a rotating shaft 11 and an end cover 10. The stator end winding 7 is in a trumpet-like shape. The stator core 8, the stator end winding 7 and the end cover 10 form a stator, and the rotor core 1, the permanent magnet 2 and the rotating shaft 11 form a rotor.
[0029] It also includes an outer claw pole 3 fixed on the rotor core. The outer claw pole is divided into an N-pole outer claw pole and an S-pole outer claw pole. The outer claw pole 3 is located axially of the rotor core and close to the outside of the permanent magnet 2. The outer claw pole 3 extends outward in the axial direction in the shape of the stator end winding 7 and is close to the stator end winding. The distance between the outer claw pole and the end winding is as small as possible. When the motor is running, the outer claw pole 3 rotates with the rotor.
[0030] It also includes an inner claw pole 4, which is divided into an N-pole inner claw pole and an S-pole inner claw pole. The inner claw pole 4 is axially outside the permanent magnet 2 and does not contact the permanent magnet 2. The shape of the inner claw pole 4 is adapted to the outer claw pole 3 and is arranged close to the inner side of the outer claw pole 3. The two inner claw poles 4 are connected by a magnetic tuning coil core 5 and are fixed on the end cover 10 and do not rotate with the rotor.
[0031] like Figure 4 As shown, the sizes of the inner claw pole 4 and the outer claw pole 3 meet the following conditions: when the rotor rotates counterclockwise so that the N-pole outer claw pole approaches the S-pole inner claw pole, the S-pole outer claw pole just moves away from the S-pole inner claw pole; when the N-pole outer claw pole begins to move away from the S-pole inner claw pole, the direction of the magnetic tuning coil current is adjusted so that the polarity of the S-pole inner claw is opposite.
[0032] The outer claw pole 3 and the inner claw pole 4 are both made of magnetic conductive material.
[0033] A magnetic tuning coil 6 is arranged on the magnetic tuning coil core 5. The current flowing into the magnetic tuning coil is alternating current, and the current size and direction of the alternating current are adjustable.
[0034] In this embodiment, the magnetic tuning coil core 5 and the end cover 10 are connected via a magnetic isolation block 9 .
[0035] In this embodiment, a through hole for the rotating shaft 11 to pass through is provided on the magnetic tuning coil core 5 .
[0036] The working principle of the present invention is as follows:
[0037] When the motor is running, the internal winding of the stator core 8 will generate a rotating magnetic field, which interacts with the permanent magnet 2 to generate a torque to rotate the rotor. The stator end winding 7 of the motor will also generate a rotating magnetic field, which is the same as the magnetic field generated by the internal winding of the stator core 8. The outer claw pole 3 will have leakage magnetic flux from the permanent magnet 2 passing through the outside of the permanent magnet 2, generating a magnetic field on the outer claw pole 3 in the same direction as the permanent magnet 2. This magnetic field interacts with the magnetic field generated by the stator end winding, generating a torque, and this torque is in the same direction as the electromagnetic torque of the motor, which plays a role in enhancing the electromagnetic torque. Figure 7 shown.
[0038] There will be a magnetic field generated by the magnetic adjustment coil 6 on the inner claw pole 4, and the size and direction of the magnetic field can be adjusted (the current passed through the magnetic adjustment coil 6 is alternating current, and the current size and direction of the alternating current are adjustable, so that the size and direction of the magnetic field can be adjusted). When the magnetic fields of the inner claw pole 4 and the outer claw pole 3 are in the same direction, the outer claw pole 3 will attract each other when it rotates with the rotor and approaches the inner claw pole 4. At this time, a torque in the same direction as the electromagnetic torque will be generated, which will increase the electromagnetic torque. When the outer claw pole 3 rotates away from the inner claw pole 4, the direction of the magnetic field of the inner claw pole 4 is adjusted to the opposite direction. At this time, the magnetic fields of the two have the same direction and repel each other, which also increases the electromagnetic torque.
[0039] The magnetic field of the outer claw pole 3 is composed of the leakage magnetic field of the permanent magnet 2 and the magnetic field generated by the magnetic adjustment coil 6. When the direction of the magnetic field generated by the magnetic adjustment coil 6 is the same as the direction of the leakage magnetic field of the permanent magnet 2, the leakage magnetic field of the permanent magnet 2 is promoted to increase the leakage magnetic field, and the main magnetic flux of the motor is reduced; when the direction of the magnetic adjustment coil 6 is opposite to the direction of the leakage magnetic field of the permanent magnet, the leakage magnetic field of the permanent magnet 2 is suppressed to increase the main magnetic flux of the motor, and when the magnetic field generated by the magnetic adjustment coil 6 is greater than the leakage magnetic field of the permanent magnet 2, the main magnetic flux of the motor is directly increased. Therefore, adjusting the size and direction of the magnetic field generated by the magnetic adjustment coil 6 can play a role in adjusting the magnetic field of the motor.
[0040] The present invention can be used for a two-pole motor, and can also be used for a four-pole, six-pole or other multi-pole motor.
[0041] The present invention forms a magnetic torque-coordinated hybrid excitation motor capable of both magnetic field adjustment and torque adjustment, and utilizes the interaction and coupling between the magnetic field of the motor end winding, the permanent magnet leakage magnetic field and the magnetic field of the magnetic field adjustment coil to achieve the purpose of both magnetic field adjustment and torque adjustment. The above embodiments are only used to illustrate but not limit the technical solution of the present invention. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that the present invention can still be modified or equivalently replaced, and any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.
[0042] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.
[0043] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the protection content of the present invention.
Claims
1. A magnetic torque co-modulation hybrid excitation motor, comprising a stator core, a stator end winding, a rotor core, a permanent magnet, a rotating shaft and an end cover, wherein the stator core, the stator end winding and the end cover form a stator, and the rotor core, the permanent magnet and the rotating shaft form a rotor, characterized in that: It also includes an outer claw pole fixed on the rotor core, the outer claw pole is located in the axial direction of the rotor core and close to the outside of the permanent magnet, the outer claw pole extends outward in the axial direction in the shape of the stator end winding and close to the stator end winding, and when the motor is running, the outer claw pole rotates with the rotor; It also includes an inner claw pole, which is located axially outside the permanent magnet and does not contact the permanent magnet. The shape of the inner claw pole is adapted to the outer claw pole and is arranged close to the inner side of the outer claw pole. Two opposite inner claw poles are connected through the core of the magnetic adjustment coil and are fixed on the end cover and do not rotate with the rotor. A magnetic adjustment coil is arranged on the magnetic adjustment coil core. The current flowing into the magnetic adjustment coil is alternating current, and the current magnitude and direction of the alternating current are adjustable. The sizes of the inner claw pole and the outer claw pole satisfy the following conditions: the outer claw pole is divided into an N-pole outer claw pole and an S-pole outer claw pole, and the inner claw pole is divided into an N-pole inner claw pole and an S-pole inner claw pole. When the rotor rotates counterclockwise so that the N-pole outer claw pole approaches the S-pole inner claw pole, the S-pole outer claw pole just moves away from the S-pole inner claw pole. When the N-pole outer claw pole begins to move away from the S-pole inner claw pole, the direction of the magnetic tuning coil current is adjusted so that the polarity of the S-pole inner claw is opposite.
2. The magnetic torque co-modulation hybrid excitation motor according to claim 1 is characterized in that: The outer claw pole and the inner claw pole are both made of magnetic conductive materials.
3. The magnetic torque co-modulation hybrid excitation motor according to claim 2 is characterized in that: The stator end windings are in a trumpet-like shape.
4. The magnetic torque co-modulation hybrid excitation motor according to claim 2 is characterized in that: The magnetic adjustment coil core and the end cover are connected via a magnetic isolation block.
5. The magnetic torque co-modulation hybrid excitation motor according to claim 2 is characterized in that: The magnetic tuning coil core is provided with a through hole for the rotating shaft to pass through.