CN118282088A - Double-redundancy slotless brushless DC permanent magnet motor - Google Patents
Double-redundancy slotless brushless DC permanent magnet motor Download PDFInfo
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- CN118282088A CN118282088A CN202410380647.5A CN202410380647A CN118282088A CN 118282088 A CN118282088 A CN 118282088A CN 202410380647 A CN202410380647 A CN 202410380647A CN 118282088 A CN118282088 A CN 118282088A
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Abstract
The application relates to the technical field of special motors and discloses a double-redundancy slotless brushless direct current permanent magnet motor which comprises a machine shell, wherein a double-redundancy stator is fixedly connected to the inner wall of the machine shell, one set of windings can continue to drive a rotor to rotate when one set of three-phase windings of the stator fail, a front end cover and a rear end cover are respectively and fixedly connected to the two ends of the machine shell, the front end cover and the rear end cover are used for providing structural support, a position sensor is fixedly connected to the rear end cover, and the position sensor is used for detecting the position and the angle of the rotor. Through the design, the double-redundancy slotless brushless direct current permanent magnet motor can effectively provide redundancy and fault tolerance for the motor in the use process, and when one set of armature windings breaks down, the other set of armature windings can independently drive the rotor to rotate, so that the reliability of the system can be effectively improved.
Description
Technical Field
The invention relates to the technical field of special motors, in particular to a dual-redundancy slotless brushless direct current permanent magnet motor.
Background
The slotless brushless direct current permanent magnet motor has the advantages of high power density, high reliability, no tooth slot effect, stable operation, small vibration and low noise, is applied to systems such as self-supporting flight systems, air conditioning systems, solar sail adjusting systems and the like in the aerospace field, and is of great importance in the design of the reliability of the motor. In the field of high-reliability motor design, redundancy technology is widely used. The traditional dual-redundancy motor is mostly a motor with a tooth slot structure, and the research application of the dual-redundancy brushless direct current permanent magnet motor is less.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the double-redundancy slotless brushless direct current permanent magnet motor, two sets of three-phase armature windings can be designed to input current through an independent control system to jointly drive a rotor to rotate, and when one set of armature windings breaks down, the other set of armature windings can independently drive the rotor to be selectively arranged, so that the reliability of the system is improved.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a dual redundancy slotless brushless DC permanent magnet motor, includes the casing, the inner wall fixedly connected with dual redundancy stator of casing, dual redundancy stator is used for guaranteeing when one set of three-phase winding of stator breaks down, still one set of winding can continue to drive the rotor rotation, the both ends of casing are fixedly connected with front end housing and rear end housing respectively, front end housing and rear end housing are used for providing structural support, rear end housing fixedly connected with position sensor, position sensor is used for detecting rotor position and angle.
Preferably, the dual-redundancy stator comprises two non-toothed stators and an inter-stator insulating plate, the two non-toothed stators are arranged in the shell, and the end face of the inter-stator insulating plate is fixedly connected between the two non-toothed stators.
Preferably, the slotless stator comprises an annular stator core and a three-phase armature winding, wherein the annular stator core is arranged in the shell, and the outer wall of the three-phase armature winding is stuck to the inner cylindrical surface of the annular stator core.
Preferably, winding axis positions of the three-phase armature windings of the two slotless stators are aligned.
Preferably, the outgoing lines at two ends of the dual-redundancy stator are respectively led out from the front side outgoing line hole and the rear side outgoing line hole of the motor.
Working principle: the double-redundancy slotless brushless direct current permanent magnet motor disclosed by the invention realizes conversion of mechanical energy by utilizing electromagnetic interaction between a stator and a rotor when in use, a winding on the stator generates a rotating magnetic field by applying current, a permanent magnet on the rotor generates a constant magnetic field, the interaction between the two magnetic fields generates torque to push the rotating motion of the motor, and the stator winding generates the rotating magnetic field by current excitation, three-phase windings of the double-redundancy stator each input current through an independent control system, when the current passes through the three-phase windings, a magnetic field is generated in the stator to form the rotating magnetic field, and the rotor is driven to rotate together.
The invention provides a dual-redundancy slotless brushless direct current permanent magnet motor. The beneficial effects are as follows:
1. The two sets of three-phase armature windings can input current through the independent control system and jointly drive the rotor to rotate, when one set of armature windings fails, the other set of armature windings can independently drive the rotor to rotate, so that redundancy and fault tolerance are provided, one electric drive winding fails, equipment can still continue to operate, the system downtime is reduced, the two sets of electric drive windings can be used in turn, the use frequency of the two sets of electric drive windings is relatively low, the service life of the equipment is effectively prolonged, and the two independent drive systems can effectively improve the reliability of the system, so that the motor has higher reliability.
2. According to the invention, the two sets of three-phase armature windings realize electric isolation and thermal isolation between windings through the insulating plates between the windings, so that current is prevented from flowing between the windings, further, propagation of fault current is prevented, the electric safety of equipment is improved, heat transmission between the windings can be prevented, so that the thermal stress of the windings is reduced, the service life of insulating materials is prolonged, the mutual inductance between the windings is reduced due to the electric isolation and the thermal isolation, and the fault current can be prevented from propagating to other windings by the electric isolation. The fault range of the equipment is reduced, and the reliability of the system is further improved.
Drawings
FIG. 1 is a schematic diagram of a dual redundancy slotless brushless DC permanent magnet motor of the present invention;
FIG. 2 is a schematic diagram of a dual redundancy stator according to the present invention;
fig. 3 is a schematic structural view of a stator without tooth slots according to the present invention.
Wherein, 1, front end cap; 2. a housing; 3. a dual redundancy stator; 31. a cogging-less stator; 311. an annular stator core; 312. a three-phase armature winding; 32. an inter-stator insulating plate; 4. a permanent magnet rotor; 5. a position sensor; 6. a rear end cover; 7. and (3) a bearing.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples:
Referring to fig. 1, the embodiment of the invention provides a dual-redundancy slotless brushless dc permanent magnet motor, which comprises a casing 2, wherein the inner wall of the casing 2 is fixedly connected with a dual-redundancy stator 3, the dual-redundancy stator 3 is used for ensuring that one set of three-phase windings of the stator fails, one set of windings can continue to drive a rotor to rotate, a rotating magnetic field is generated after the dual-redundancy electronics are electrified, the permanent magnet rotor 4 is driven to rotate, the dual-redundancy brushless dc permanent magnet motor is composed of two slotless stators 31 and an insulating plate 32 between the stators, the dual-redundancy brushless dc permanent magnet motor has a redundant design, when one slotless stator 31 fails, the other slotless stator 31 can still ensure the motor to work, the two ends of the casing 2 are fixedly connected with a front end cover 1 and a rear end cover 6 respectively, the front end cover 1 and the rear end cover 6 are used for providing structural support, the rear end cover 6 is fixedly connected with a position sensor 5, the position sensor 5 is used for detecting the position and the angle of the rotor, and the permanent magnet rotor 4 can be driven to rotate according to a rotor position signal provided by the position sensor 5.
Referring to fig. 2, the dual redundancy stator 3 includes two non-cogged stators 31 and an inter-stator insulation plate 32, the two non-cogged stators 31 are disposed inside the casing 2, the end faces of the inter-stator insulation plate 32 are fixedly connected between the two non-cogged stators 31, and under the action of the inter-stator insulation plate 32, electrical isolation and thermal isolation between windings can be achieved, so that current is prevented from flowing between the windings, further propagation of fault current is prevented, electrical safety of the device is improved, heat transmission between the windings can be prevented, thermal stress of the windings is reduced, service life of insulating materials is prolonged, and electrical isolation and thermal isolation are helpful for reducing mutual inductance between the windings, and electrical isolation can prevent fault current from propagating to other windings, reduce fault range of the device, and further improve reliability of the system.
Referring to fig. 3, the slotless stator 31 includes an annular stator core 311 and a three-phase armature winding 312, the annular stator core 311 is disposed inside the casing 2, the outer wall of the three-phase armature winding 312 is adhered to the inner cylindrical surface of the annular stator core 311, two sets of three-phase armature windings 312 can input current through an independent control system and drive the rotor to rotate together, when one set of armature windings fails, the other set of armature windings can independently drive the rotor to be selectively installed, thereby providing redundancy and fault tolerance, so that one set of electric drive windings fails, the device can still continue to operate, system downtime is reduced, and when one set of electric drive windings needs to be maintained and replaced, the other set of electric drive windings can still continue to provide power, the influence of maintenance process on the system is reduced, and the two sets of electric drive windings can provide better load distribution and stability, thereby being beneficial to increasing the stability of the system, and the two sets of electric drive windings can be used alternately, so that the service frequency of the two sets of electric drive windings is relatively low, the service life of the device is effectively prolonged, and the two independent drive systems can effectively promote the reliability of the system, thereby enabling the motor to have higher reliability.
The alignment of the winding axis positions of the three-phase armature windings 312 of the two slotless stators 31 ensures that the de-windings are evenly distributed in the stator and that the electromagnetic field is able to effectively interact with the rotor, which can help to improve the efficiency and performance of the motor.
The outgoing lines at two ends of the dual-redundancy stator 3 are respectively led out from the front side outgoing line hole and the rear side outgoing line hole of the motor, and the outgoing lines are led out from the front side outgoing line hole and the rear side outgoing line hole of the motor and are used for connecting input and output power supply, signal or control lines of the motor. The lead wires can transmit electric energy to the driving device or receive feedback signals from the motor, so that the motor can be controlled and operated.
The inner holes of the front end cover 1 and the rear end cover 6 are respectively provided with a bearing 7, and the bearings 7 play roles in supporting and reducing friction in the motor. They support the rotational movement of the rotor shaft and help reduce energy losses and wear. The use of bearings 7 may improve the stability and lifetime of the motor.
The outer wall of the bearing 7 is fixedly connected with a permanent magnet rotor 4, and the permanent magnet rotor 4 is used for providing a magnetic field. And establishing an idle magnetic field of the motor, and when the motor is electrified, driving the motor by the stator magnetic field to generate rotary mechanical energy output.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a dual-redundancy slotless brushless direct current permanent magnet motor, includes casing (2), its characterized in that, the inner wall fixedly connected with dual-redundancy stator (3) of casing (2), when dual-redundancy stator (3) are used for guaranteeing that a set of three-phase winding of stator breaks down, still a set of winding can continue to drive the rotor rotation, the both ends of casing (2) are fixedly connected with front end housing (1) and rear end housing (6) respectively, front end housing (1) and rear end housing (6) are used for providing structural support, rear end housing (6) fixedly connected with position sensor (5), position sensor (5) are used for detecting rotor position and angle.
2. The double-redundancy slotless brushless direct current permanent magnet motor according to claim 1, wherein the double-redundancy stator (3) comprises two slotless stators (31) and an inter-stator insulating plate (32), the two slotless stators (31) are arranged in the casing (2), and the end face of the inter-stator insulating plate (32) is fixedly connected between the two slotless stators (31).
3. The double-redundancy slotless brushless direct current permanent magnet motor according to claim 2, wherein the slotless stator (31) comprises an annular stator core (311) and a three-phase armature winding (312), the annular stator core (311) is arranged inside the casing (2), and the outer wall of the three-phase armature winding (312) is adhered to the inner cylindrical surface of the annular stator core (311).
4. A dual redundancy slotless brushless dc permanent magnet machine according to claim 3, wherein the winding axis positions of the three phase armature windings (312) of the two slotless stators (31) are aligned.
5. The dual-redundancy slotless brushless direct current permanent magnet motor according to claim 1, wherein the outgoing lines at both ends of the dual-redundancy stator (3) are respectively led out from the front side outgoing line hole and the rear side outgoing line hole of the motor.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118282088A true CN118282088A (en) | 2024-07-02 |
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