Dual-redundancy slotless brushless direct-current permanent-magnet motor

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 shell, the inner wall of the shell is fixedly connected with a double-redundancy stator, the double-redundancy stator is used for guaranteeing that when a set of three-phase windings of the stator fails, another set of windings can continue to drive the rotor to rotate, the two ends of the shell are fixedly connected with a front end cover and a rear end cover respectively, the front end cover and the rear end cover are used for providing structural support, the rear end cover is fixedly connected with a position sensor, and the position sensor is used for detecting the position and angle of the rotor. The double-redundancy slotless brushless direct-current permanent-magnet motor can effectively provide redundancy and fault tolerance for the motor during use, when a set of armature windings fails, another set of armature windings can independently drive the rotor to rotate, and the reliability of the system can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of special electric machines, in particular to a double-redundancy slotless brushless DC permanent magnet motor. BACKGROUND

[0002] The slotless brushless DC permanent magnet motor has the advantages of high power density, high reliability, no slot effect, smooth operation, small vibration and low noise, and is applied in the fields of aerospace, air conditioning system, solar sail adjustment system and the like. The reliability design of the motor is very important. In the field of high-reliability motor design, redundancy technology is widely used. The traditional double-redundancy motor is mostly a slot structure motor, and the double-redundancy slotless brushless DC permanent magnet motor is less researched and applied. SUMMARY

[0003] In view of the shortcomings of the prior art, the present application provides a double-redundancy slotless brushless DC permanent magnet motor. Two sets of three-phase armature windings are designed to input current through independent control systems and drive the rotor to rotate. When one set of armature windings fails, the other set of armature windings can independently drive the rotor to be installed, thereby improving the reliability of the system.

[0004] To achieve the above purpose, the present application realizes the following technical scheme: a double-redundancy slotless brushless DC permanent magnet motor, comprising a shell, a double-redundancy stator is fixedly connected to the inner wall of the shell, the double-redundancy stator is used to ensure that when one set of three-phase windings of the stator fails, the other set of windings can continue to drive the rotor to rotate, the front end cover and the rear end cover are fixedly connected to the two ends of the shell, the front end cover and the rear end cover are used to provide structural support, the position sensor is fixedly connected to the rear end cover, and the position sensor is used to detect the position and angle of the rotor.

[0005] Preferably, the double-redundancy stator comprises two toothless stators and a stator inter-insulation plate, the two toothless stators are arranged in the interior of the shell, and the end surface of the stator inter-insulation plate is fixedly connected between the two toothless stators.

[0006] Preferably, the toothless stator comprises a ring-shaped stator core and a three-phase armature winding, the ring-shaped stator core is arranged in the interior of the shell, and the outer wall of the three-phase armature winding is attached to the inner cylindrical surface of the ring-shaped stator core.

[0007] Preferably, the winding axis positions of the three-phase armature windings of the two toothless stators are aligned.

[0008] Preferably, the lead-out wires at the two ends of the double-redundancy stator are led out from the front side wire outlet hole and the rear side wire outlet hole of the motor respectively.

[0009] Working principle: the double-redundancy slotless brushless DC permanent magnet motor of the application utilizes the electromagnetic interaction between the stator and the rotor to realize the conversion of mechanical energy when in use, and the windings on the stator generate a rotating magnetic field through the application of current, while the permanent magnets on the rotor generate a constant magnetic field, the interaction between the two magnetic fields generates torque to push the rotating movement of the motor, and wherein the stator windings generate a rotating magnetic field through current excitation, the three-phase windings of the double-redundancy stator are each inputted with current through an independent control system, when the current passes through the three-phase windings, a magnetic field will be generated in the stator, forming a rotating magnetic field, which drives the rotor to rotate through common driving, when one set of armature windings fails, the other set of armature windings can independently drive the rotor to rotate, providing redundancy and fault tolerance for the motor, improving the reliability of the system, the permanent magnets on the permanent magnet rotor generate a constant magnetic field, when the rotating magnetic field generated by the stator interacts with the magnetic field of the permanent magnet, torque is generated, causing the rotor to start rotating, wherein the position sensor inside the motor detects the position and angle of the rotor, thereby obtaining the position information of the rotor, and the control system monitors and adjusts the running state of the motor in real time.

[0010] The application provides a double-redundancy slotless brushless DC permanent magnet motor.

[0011] 1、The two sets of three-phase armature windings of the application can input current through independent control systems to commonly 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, thereby providing redundancy and fault tolerance, so that the equipment can still continue to run when one electric drive winding fails, reducing the system downtime, and the two sets of electric drive windings can be used in turn, so that their use frequency is relatively low, effectively prolonging the service life of the equipment, and the two independent drive systems can effectively improve the reliability of the system, thereby making the motor have high reliability.

[0012] 2、The two sets of three-phase armature windings of the application realize electrical isolation and thermal isolation between windings through the winding insulation plate, thereby preventing current from flowing between windings, thereby helping to prevent the spread of fault current and improve the electrical safety of the equipment, while being able to prevent heat transfer between windings, thereby reducing the thermal stress of the windings and prolonging the service life of the insulation material, and the electrical isolation and thermal isolation help to reduce the mutual inductance between windings, and the electrical isolation can prevent the spread of fault current to other windings, reducing the fault range of the equipment and further improving the reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the double-redundancy slotless brushless DC permanent magnet motor of the application.

[0014] Figure 2 It is a structural schematic diagram of the double-redundancy stator of the application.

[0015] Figure 3 Structure diagram of the toothless slotless stator of the present application.

[0016] Wherein, 1, front end cover; 2, casing; 3, double redundancy stator; 31, toothless slotless stator; 311, annular stator core; 312, three-phase armature winding; 32, stator inter-insulation plate; 4, permanent magnet rotor; 5, position sensor; 6, rear end cover; 7, bearing. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the specification of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] Embodiment:

[0019] Please refer to the accompanying drawings Figure 1 The embodiment of the present application provides a double redundancy slotless brushless DC permanent magnet motor, which comprises a casing 2, the inner wall of the casing 2 is fixedly connected with a double redundancy stator 3, the double redundancy stator 3 is used to ensure that when a set of three-phase winding of the stator fails, another set of winding can continue to drive the rotor to rotate, the double redundancy stator 3 generates a rotating magnetic field after being electrified by the double redundancy electronic, and drives the permanent magnet rotor 4 to rotate, the double redundancy stator 3 is composed of two toothless slotless stators 31 and a stator inter-insulation plate 32, has a redundancy design, when one toothless slotless stator 31 fails, the other toothless slotless stator 31 can still guarantee the operation of the motor, 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 to provide structural support, the rear end cover 6 is fixedly connected with a position sensor 5, the position sensor 5 is used to detect the position and angle of the rotor, and the double redundancy stator 3 can be electrified according to the rotor position signal provided by the position sensor 5, to drive the permanent magnet rotor 4 to rotate.

[0020] Please refer to the accompanying drawings Figure 2 The double redundancy stator 3 comprises two toothless slotless stators 31 and a stator inter-insulation plate 32, the two toothless slotless stators 31 are arranged in the interior of the casing 2, and the end surface of the stator inter-insulation plate 32 is fixedly connected between the two toothless slotless stators 31. Under the action of the stator inter-insulation plate 32, electrical isolation and thermal isolation between windings can be achieved, so as to prevent current from flowing between windings, thereby helping to prevent the propagation of fault current and improve the electrical safety of the equipment. At the same time, the heat transmission between windings can be prevented, thereby reducing the thermal stress of the winding, prolonging the service life of the insulation material, and the electrical isolation and thermal isolation help to reduce the mutual inductance between windings, and the electrical isolation can prevent the propagation of fault current to other windings, reduce the failure range of the equipment, and further improve the reliability of the system.

[0021] Please refer to the attached drawings Figure 3 The toothless slot stator 31 includes an annular stator core 311 and three-phase armature windings 312. The annular stator core 311 is arranged inside the casing 2, and the outer wall of the three-phase armature windings 312 is attached to the inner cylindrical surface of the annular stator core 311. Two sets of three-phase armature windings 312 can input current through independent control systems to 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 operate, thereby providing redundancy and fault tolerance. Even if one set of armature windings fails, the device can still continue to operate, reducing system downtime. When one set of armature windings needs to be repaired or replaced, the other set can still provide power, reducing the impact of the maintenance process on the system. Two sets of armature windings can provide better load distribution and stability, which is conducive to increasing the stability of the system. In addition, the two sets of armature windings can be used alternately, so that their usage frequency is relatively low, effectively prolonging the service life of the device. Two independent drive systems can effectively improve the reliability of the system, thereby making the motor have high reliability.

[0022] The winding axis positions of the three-phase armature windings 312 of the two toothless slot stators 31 are aligned. This alignment can ensure that the de-winding is uniformly distributed in the stator, and enable the electromagnetic field to effectively interact with the rotor, which can help improve the efficiency and performance of the motor.

[0023] The lead-out wires at both ends of the dual-redundancy stator 3 are led out from the front and rear wire outlet holes of the motor. The lead-out wires are led out from the front and rear wire outlet holes of the motor, which are used to connect the input and output power, signals or control lines of the motor. These lead-out wires can transmit electrical energy to the drive device or receive feedback signals from the motor, realizing the control and operation of the motor.

[0024] The inner holes of the front end cover 1 and the rear end cover 6 are respectively fitted with bearings 7, which play a role in supporting and reducing friction in the motor. They support the rotational movement of the rotor shaft and help reduce energy loss and wear. The use of bearings 7 can improve the stability and life of the motor.

[0025] The outer wall of the bearing 7 is fixedly connected with the permanent magnet rotor 4, which is used to provide a magnetic field. The no-load magnetic field of the motor is established, and when the motor is powered on, it is driven by the stator magnetic field to generate rotary mechanical energy output.

[0026] Although embodiments of the present application 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 application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-redundant slotless brushless DC permanent magnet motor, comprising a housing (2), characterized in that, The inner wall of the housing (2) is fixedly connected to a dual-redundant stator (3). The dual-redundant stator (3) is used to ensure that when one set of three-phase windings of the stator fails, there is still one set of windings that can continue to drive the rotor to rotate. The two ends of the housing (2) are respectively fixedly connected to a front end cover (1) and a rear end cover (6). The front end cover (1) and the rear end cover (6) are used to provide structural support. The rear end cover (6) is fixedly connected to a position sensor (5). The position sensor (5) is used to detect the rotor position and angle. The dual-redundant stator (3) includes two slotless stators (31) and an inter-stator insulation plate (32). The two slotless stators (31) are disposed inside the housing (2), and the end face of the inter-stator insulation plate (32) is fixedly connected between the two slotless stators (31). 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 housing (2), and the outer wall of the three-phase armature winding (312) is attached to the inner cylindrical surface of the annular stator core (311).

2. The dual-redundant slotless brushless DC permanent magnet motor according to claim 1, characterized in that, The winding axes of the three-phase armature windings (312) of the two slotless stators (31) are aligned.

3. The dual-redundant slotless brushless DC permanent magnet motor according to claim 1, characterized in that, The lead wires at both ends of the dual-redundant stator (3) are led out from the front and rear lead wire holes of the motor, respectively.

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