Double three-phase slot-gapped permanent magnet alternating current servo motor
By employing an isolation slot design in the dual three-phase permanent magnet AC servo motor, physical isolation and heat dissipation between windings are achieved, solving the problem of mutual inductance of windings affecting motor stability and improving the motor's working stability and protection functions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI XINRUI DRIVE TECH CO LTD
- Filing Date
- 2022-07-12
- Publication Date
- 2026-05-19
AI Technical Summary
The shared slot configuration of the two windings in a dual three-phase permanent magnet synchronous motor results in high mutual inductance between the windings, which affects the stability of the motor operation.
An isolation slot design is adopted, in which the first winding and the second winding are nested in the first isolation slot and the second isolation slot respectively. The isolation slots achieve physical isolation between the windings. Furthermore, the first isolation slot and the second isolation slot are staggered at equal intervals to increase the coil spacing and reduce mutual inductance.
Physical isolation between windings is achieved, reducing the impact of mutual inductance on the motor's operational stability, improving heat dissipation efficiency, preventing irreversible demagnetization and overheating of the magnets, and protecting the motor.
Smart Images
Figure CN115173605B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of motor structure, and in particular to a double three-phase slotted permanent magnet AC servo motor. Background Technology
[0002] Multiphase permanent magnet synchronous motors have been widely studied and applied in recent years. In addition to the advantages of traditional permanent magnet synchronous motors, they also have advantages such as low torque ripple, good fault tolerance, and multiple degrees of control freedom. Currently, five-phase and six-phase (i.e., double three-phase) motors are the most widely studied and applied.
[0003] Among them, the dual three-phase permanent magnet synchronous motor includes two sets of three-phase windings, and the two sets of three-phase windings can be powered by independent three-phase inverters, thus having the advantages of simple control and low inverter cost.
[0004] Regarding the above-mentioned technology, the inventors discovered the following defects: the two sets of windings of the dual three-phase permanent magnet synchronous motor are configured to share a common slot, and the distance between the two sets of windings is small, resulting in a large mutual inductance between the two sets of windings. This mutual inductance of the windings can easily affect the working stability of the motor. Summary of the Invention
[0005] To reduce the impact of winding mutual inductance on the working stability of the motor, this application provides a double three-phase slotted permanent magnet AC servo motor.
[0006] The technical solution for a dual three-phase slotted permanent magnet AC servo motor provided in this application is as follows:
[0007] A dual three-phase slotted permanent magnet AC servo motor includes:
[0008] The motor body includes a motor stator, stator windings disposed on the motor stator, and a motor rotor;
[0009] An isolation assembly is disposed on the motor stator to accommodate the stator windings;
[0010] A working control module is located on the motor stator and connected to the stator winding;
[0011] The stator winding operates in response to the operation control signal of the operation control module;
[0012] The isolation assembly includes a plurality of first isolation slots and a plurality of second isolation slots opened along the direction of the motor stator diameter.
[0013] The stator winding includes a first winding nested in the first isolation slot and a second winding nested in the second isolation slot;
[0014] The first winding includes a plurality of first coils arranged at equal intervals, and the second winding includes a plurality of second coils arranged at equal intervals.
[0015] By adopting the above technical solution, when the motor is working, the first winding is located in the first isolation slot and the second winding is located in the second isolation slot. On the basis of achieving physical isolation between the same set of stator windings, physical isolation between the first winding and the second winding is also achieved, so that the first coil and the second coil are independent of each other when working, thereby reducing the mutual inductance between the first winding and the second winding and reducing the impact of winding mutual inductance on the working stability of the motor.
[0016] Optionally, the first isolation groove and the second isolation groove are staggered at equal intervals, and the outer diameter of the first isolation groove is larger than the outer diameter of the second isolation groove; the first coil is located at the outer end of the first isolation groove, and the second coil is located at the outer end of the second isolation groove.
[0017] By adopting the above technical solution, the first isolation groove and the second isolation groove are arranged alternately at equal intervals, so that each first coil and the second coil can be arranged alternately at equal intervals. At the same time, the first coil is set outside the second coil, thereby increasing the setting distance between the first coil and the second coil, reducing the overlap of heat dissipation of the first coil and the second coil, which is conducive to the first coil and the second coil performing heat dissipation operations separately.
[0018] Optionally, the motor body is provided with a load current detection module connected to the stator winding and a display module connected to the load current detection module. The display module operates in response to the load current detection signal of the load current detection module.
[0019] By adopting the above technical solution, when the motor is working, the load current detection module measures the load current connected to the motor body in real time, and the display module displays the actual value of the load current in real time, so that users can intuitively know the specific value of the current load current.
[0020] Optionally, the motor body is provided with a load current monitoring module that is connected to both the load current detection module and the operation control module; the load current monitoring module responds to the load current detection signal from the load current detection module and controls the operation control module to stop the operation of the stator winding.
[0021] By adopting the above technical solution, the load current monitoring module monitors the load current connected to the motor body. The load current monitoring module stores a preset load current threshold. When the load current monitoring module finds that the actual load current exceeds the preset load current threshold, it means that the magnitude of the load current exceeds the demagnetization resistance of the current motor magnet, which is likely to cause irreversible demagnetization of the magnet. At this time, the load current monitoring module controls the stator winding to stop operating through the working control module, so that the magnet is less likely to experience irreversible demagnetization.
[0022] Optionally, the motor body is provided with a load current analysis module that is connected to the load current monitoring module and the display module respectively. The load current analysis module controls the display module to display a recommended motor model corresponding to the current load current based on the load current monitoring signal of the load current monitoring module.
[0023] By adopting the above technical solution, when the load current monitoring module stops operating the stator winding through the working control module, the load current analysis module performs data analysis based on the load current monitoring signal from the load current monitoring module. The load current analysis module stores motor models corresponding to different load current magnitudes. After the load current analysis module completes its analysis, it generates and sends a load current analysis signal, which in turn controls the display module to display the recommended motor model corresponding to the current load current.
[0024] Optionally, the motor body is provided with a current increment calculation module that is connected to the load current detection module and the display module respectively. The current increment calculation module controls the operation of the display module in response to the load current detection signal of the load current detection module.
[0025] By adopting the above technical solution, if magnetic performance deterioration occurs during motor operation, the motor current will increase instantaneously. At this time, the current increment calculation module detects and calculates the change in motor current in real time, and displays it in real time through the display module. This allows users to monitor the change in motor current in real time and change the motor's operating status in a timely manner.
[0026] Optionally, the motor body is provided with a current increment monitoring module that is connected to the current increment calculation module and the operation control module respectively. The current increment monitoring module responds to the current increment calculation signal of the current increment calculation module and controls the operation control module to control the stator winding to stop operating.
[0027] By adopting the above technical solution, the current increment monitoring module stores a preset current increment threshold. When the instantaneous current increment exceeds the current increment threshold, the current increment monitoring module generates a current increment monitoring signal and sends it. Then, the working control module controls the stator winding to stop operating, reducing the overlap and deterioration of magnetic properties and current demagnetization, thereby reducing the impact of current surge on the motor's operating state.
[0028] Optionally, the motor body is provided with a motor temperature detection module that is connected to both the motor body and the display module, and the display module operates in response to the motor temperature detection signal from the motor temperature detection module.
[0029] By adopting the above technical solution, the motor temperature detection module detects the motor's operating temperature in real time, and the display module displays the motor's actual operating temperature in real time, making it easy for users to intuitively view the motor's heating status and take timely action against overheating motors.
[0030] Optionally, the motor body is provided with a motor temperature monitoring module that is connected to both the motor temperature detection module and the operation control module. The motor temperature monitoring module responds to the motor temperature detection signal from the motor temperature detection module and controls the operation control module to stop the operation of the stator winding.
[0031] By adopting the above technical solution, when the motor overheats, the motor temperature monitoring module generates and sends a motor temperature monitoring signal. The motor temperature monitoring module then controls the stator winding to stop operating, thereby preventing the motor temperature from rising further and preventing the motor from overheating.
[0032] In summary, this application includes at least one of the following beneficial technical effects:
[0033] 1. When the motor is working, the first winding is located in the first isolation slot and the second winding is located in the second isolation slot. On the basis of achieving physical isolation between the same set of stator windings, physical isolation between the first winding and the second winding is also achieved, so that the first coil and the second coil are independent of each other when working, thereby reducing the mutual inductance between the first winding and the second winding and reducing the impact of winding mutual inductance on the working stability of the motor.
[0034] 2. The first and second isolation slots are staggered at equal intervals, allowing the first and second coils to be staggered at equal intervals. Simultaneously, the first coil is positioned outside the second coil, further increasing the spacing between them and reducing the overlap in heat dissipation between the two coils. This facilitates separate heat dissipation operations for the first and second coils.
[0035] 3. The load current monitoring module monitors the load current connected to the motor body. The load current monitoring module stores a preset load current threshold. When the load current monitoring module finds that the actual load current exceeds the preset load current threshold, it means that the magnitude of the load current exceeds the demagnetization resistance of the current motor magnet, which is likely to cause irreversible demagnetization of the magnet. At this time, the load current monitoring module controls the stator winding to stop operating through the working control module, so that the magnet is less likely to undergo irreversible demagnetization. Attached Figure Description
[0036] Figure 1 This is a structural schematic diagram of an embodiment of this application.
[0037] Figure 2 This is a block diagram of each module in the embodiments of this application.
[0038] Figure 3 This is a block diagram highlighting the motor temperature detection module and the motor temperature monitoring module in the embodiments of this application.
[0039] Explanation of reference numerals in the attached diagram: 1. Motor stator; 2. Stator winding; 21. First winding; 211. First coil; 22. Second winding; 221. Second coil; 3. Isolation assembly; 31. First isolation slot; 32. Second isolation slot; 4. Working control module; 5. Load current detection module; 6. Display module; 7. Load current monitoring module; 8. Load current analysis module; 9. Current increment calculation module; 10. Current increment monitoring module; 11. Motor temperature detection module; 12. Motor temperature monitoring module. Detailed Implementation
[0040] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0041] This application discloses a dual three-phase slotted permanent magnet AC servo motor, referring to... Figure 1 and Figure 2 The motor includes a motor body, which comprises a motor stator 1, a stator winding 2 mounted on the motor stator 1, and a motor rotor that works in conjunction with the motor stator 1. When the motor is working, the motor rotor rotates, and the motor stator 1 rotates relative to the motor rotor, thereby driving the stator winding 2 mounted on the motor stator 1 to operate, thus realizing the basic working process of the motor.
[0042] The stator winding 2 includes a first winding 21 and a second winding 22, wherein both the first winding 21 and the second winding 22 are driven by the motor rotor; the first winding 21 includes a plurality of first coils 211 arranged at equal intervals, and the second winding 22 includes a plurality of second coils 221 arranged at equal intervals.
[0043] The motor stator 1 is provided with an isolation component 3 for accommodating the stator windings 2. While accommodating the stator windings 2, the isolation component 3 can separate adjacent stator windings 2, thereby reducing the mutual inductance between the stator windings 2 by increasing the physical isolation between them.
[0044] The isolation assembly 3 includes multiple first isolation slots 31 and multiple second isolation slots 32 formed on the motor stator 1; the number of first isolation slots 31 and second isolation slots 32 are equal, and the depth direction of both the first isolation slots 31 and the second isolation slots 32 is arranged along the radial direction of the motor stator 1. The first winding 21 is nested in the first isolation slot 31, and the second winding 22 is nested in the second isolation slot 32.
[0045] When the motor is working, the first winding 21 is located in the first isolation slot 31, and the second winding 22 is located in the second isolation slot 32. Based on the physical isolation between the same set of stator windings 2, the physical isolation between the first winding 21 and the second winding 22 is also achieved, so that the first coil 211 and the second coil 221 are independent of each other when working, thereby reducing the mutual inductance between the first winding 21 and the second winding 22 and reducing the impact of winding mutual inductance on the working stability of the motor.
[0046] In this embodiment, there are twelve first isolation grooves 31 and twelve second isolation grooves 32. The first isolation grooves 31 and the second isolation grooves 32 are arranged alternately at equal intervals. The opening depth of the first isolation groove 31 is greater than the opening depth of the second isolation groove 32. The first coil 211 is nested at the bottom of the first isolation groove 31, and the second coil 221 is nested at the bottom of the second isolation groove 32.
[0047] The first isolation groove 31 and the second isolation groove 32 are arranged alternately at equal intervals, so that the first coil 211 and the second coil 221 can be arranged alternately at equal intervals. At the same time, the first coil 211 is arranged outside the second coil 221, thereby increasing the arrangement distance between the first coil 211 and the second coil 221, reducing the overlap of heat dissipation of the first coil 211 and the second coil 221, which is beneficial for the first coil 211 and the second coil 221 to perform heat dissipation operations separately.
[0048] Reference Figure 2 and Figure 3 The motor stator 1 is equipped with a working control module 4 connected to the stator winding 2. The stator winding 2 operates in response to the working control signal of the working control module 4. The user controls the on and off of the stator winding 2 through the working control module 4, thereby realizing the control of the motor's working state.
[0049] The motor body is equipped with a load current detection module 5 connected to the stator winding 2 and a display module 6 connected to the load current detection module 5. The display module 6 operates in response to the load current detection signal of the load current detection module 5.
[0050] When the motor is working, the load current detection module 5 measures the load current connected to the motor body in real time, and the display module 6 displays the actual value of the load current in real time, so that users can intuitively know the specific value of the current load current.
[0051] The motor body is equipped with a load current monitoring module 7, which is connected to the load current detection module 5 and the operation control module 4 respectively. The load current monitoring module 7 responds to the load current detection signal of the load current detection module 5 and controls the operation control module 4 to control the stator winding 2 to stop operating.
[0052] The load current monitoring module 7 monitors the load current connected to the motor body. The load current monitoring module 7 stores a preset load current threshold. When the load current monitoring module 7 finds that the actual load current exceeds the preset load current threshold, it means that the magnitude of the load current exceeds the demagnetization resistance of the current motor magnet, which can easily cause irreversible demagnetization of the magnet.
[0053] At this time, the load current monitoring module 7 generates a load current monitoring signal, which controls the stator winding 2 to stop operating through the working control module 4. This allows the motor to detect the magnitude of the load current in real time during operation and to stop the motor from running in time if the load current is too large, thus protecting the motor and preventing irreversible demagnetization of the magnets.
[0054] The motor body is equipped with a load current analysis module 8, which is connected to the load current monitoring module 7 and the display module 6 respectively. The load current analysis module 8 controls the display module 6 to display the recommended motor model corresponding to the current load current based on the load current monitoring signal of the load current monitoring module 7.
[0055] When the load current monitoring module 7 controls the stator winding 2 to stop operating through the working control module 4, the load current analysis module 8 receives and responds to the load current monitoring signal of the load current monitoring module 7, and performs data analysis operation according to the load current monitoring signal.
[0056] The load current analysis module 8 stores motor models corresponding to different load currents. After the load current analysis module 8 finishes its analysis, it generates and sends a load current analysis signal based on the motor model corresponding to the current load current, thereby controlling the display module 6 to display the recommended motor model corresponding to the current load current, so that users can select the appropriate motor model based on the data.
[0057] The motor body is equipped with a current increment calculation module 9 that is connected to the load current detection module 5 and the display module 6 respectively. The current increment calculation module 9 controls the operation of the display module 6 in response to the load current detection signal of the load current detection module 5.
[0058] When the motor is running, the current increment calculation module 9 detects and calculates the change in motor current in real time, and displays it in real time through the display module 6, so that users can monitor the change in motor current in real time and know the current change of the current in the current working environment of the motor.
[0059] When an electric motor is running, if magnetic degradation occurs, the motor current will increase instantaneously, causing the motor to overheat. This further degrades the magnetic properties of the magnets, leading to another increase in current. The combined effect of these two factors can cause the motor to fail within a very short time. The user can promptly monitor the current changes through the display module 6, allowing for timely adjustments to the motor's operating status and protecting it.
[0060] The motor body is equipped with a current increment monitoring module 10, which is connected to the current increment calculation module 9 and the operation control module 4 respectively. The current increment monitoring module 10 responds to the current increment calculation signal of the current increment calculation module 9 and controls the operation control module 4 to control the stator winding 2 to stop operating.
[0061] The current increment monitoring module 10 stores a preset current increment threshold. When the instantaneous current increment exceeds the current increment threshold, the current increment monitoring module 10 generates a current increment monitoring signal and sends it. Then, the stator winding 2 is controlled to stop operating through the working control module 4 to reduce the overlap and deterioration of magnetic properties and current demagnetization, thereby reducing the impact of current surge on the motor's operating state.
[0062] The motor body is equipped with a motor temperature detection module 11 that is connected to both the motor body and the display module 6. The display module 6 operates in response to the motor temperature detection signal from the motor temperature detection module 11.
[0063] When the motor is running, the motor temperature detection module 11 detects the motor's operating temperature in real time, and the display module 6 displays the actual operating temperature of the motor in real time, so that users can intuitively view the motor's heating status and deal with the overheating motor in a timely manner.
[0064] The motor body is equipped with a motor temperature monitoring module 12, which is connected to the motor temperature detection module 11 and the operation control module 4 respectively. The motor temperature monitoring module 12 responds to the motor temperature detection signal of the motor temperature detection module 11 and controls the operation control module 4 to control the stator winding 2 to stop operating.
[0065] When the motor overheats, the motor temperature monitoring module 12 generates and sends a motor temperature monitoring signal. The motor temperature monitoring module 12 controls the operation control module 4 to stop the operation of the stator winding 2, thereby preventing the motor temperature from rising further and preventing the motor from overheating.
[0066] The implementation principle of a double three-phase slotted permanent magnet AC servo motor according to an embodiment of this application is as follows: When the motor is working, the first winding 21 is located in the first isolation slot 31, and the second winding 22 is located in the second isolation slot 32. On the basis of achieving physical isolation between the same set of stator windings 2, physical isolation between the first winding 21 and the second winding 22 is achieved, so that the first coil 211 and the second coil 221 are independent of each other when working, thereby weakening the mutual inductance between the first winding 21 and the second winding 22 and reducing the impact of winding mutual inductance on the working stability of the motor.
[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A double three-phase slotted permanent magnet AC servo motor, characterized in that, include: The motor body includes a motor stator (1), a stator winding (2) disposed on the motor stator (1), and a motor rotor; An isolation component (3) is disposed on the motor stator (1) for accommodating the stator winding (2); The working control module (4) is located on the motor stator (1) and connected to the stator winding (2); The stator winding (2) operates in response to the operation control signal of the operation control module (4); The isolation assembly (3) includes a plurality of first isolation slots (31) opened along the radial direction of the motor stator (1) and a plurality of second isolation slots (32) opened along the radial direction of the motor stator (1); The stator winding (2) includes a first winding (21) nested in the first isolation slot (31) and a second winding (22) nested in the second isolation slot (32); The first winding (21) includes a plurality of first coils (211) arranged at equal intervals, and the second winding (22) includes a plurality of second coils (221) arranged at equal intervals; The motor body is provided with a load current detection module (5) connected to the stator winding (2) and a display module (6) connected to the load current detection module (5). The display module (6) operates in response to the load current detection signal of the load current detection module (5). The motor body is provided with a load current monitoring module (7) connected to the load current detection module (5) and the working control module (4) respectively. The load current monitoring module (7) controls the working control module (4) to stop the operation of the stator winding (2) in response to the load current detection signal of the load current detection module (5). The motor body is provided with a load current analysis module (8) connected to the load current monitoring module (7) and the display module (6) respectively. The load current analysis module (8) controls the display module (6) to display a recommended motor model corresponding to the current load current based on the load current monitoring signal of the load current monitoring module (7). The motor body is provided with a current increment calculation module (9) connected to the load current detection module (5) and the display module (6) respectively. The current increment calculation module (9) controls the operation of the display module (6) in response to the load current detection signal of the load current detection module (5). The motor body is provided with a current increment monitoring module (10) connected to the current increment calculation module (9) and the operation control module (4) respectively. The current increment monitoring module (10) controls the operation control module (4) to stop the operation of the stator winding (2) in response to the current increment calculation signal of the current increment calculation module (9).
2. The double three-phase slotted permanent magnet AC servo motor according to claim 1, characterized in that: The first isolation groove (31) and the second isolation groove (32) are staggered at equal intervals, and the outer diameter of the first isolation groove (31) is larger than the outer diameter of the second isolation groove (32); the first coil (211) is located at the outer end of the first isolation groove (31), and the second coil (221) is located at the outer end of the second isolation groove (32).
3. The double three-phase slotted permanent magnet AC servo motor according to claim 1, characterized in that: The motor body is provided with a motor temperature detection module (11) that is connected to both the motor body and the display module (6). The display module (6) operates in response to the motor temperature detection signal from the motor temperature detection module (11).
4. A double three-phase slotted permanent magnet AC servo motor according to claim 3, characterized in that: The motor body is provided with a motor temperature monitoring module (12) that is connected to the motor temperature detection module (11) and the working control module (4) respectively. The motor temperature monitoring module (12) responds to the motor temperature detection signal of the motor temperature detection module (11) and controls the working control module (4) to control the stator winding (2) to stop operating.