A same-slot double-winding redundant permanent magnet synchronous motor

Abstract

The present invention discloses a same-slot double-winding redundant permanent magnet synchronous motor, which relates to the field of permanent magnet synchronous motors, including a housing, etc. A stator core with a groove is embedded in the housing and fixed, a first winding and a second winding are fixed along the groove of the stator core, and the second winding is wound around the outer periphery of the first winding; an insulating material is laid between the first winding and the second winding to make the two relatively insulated; the lead wire of the first winding is electrically connected to the first connector, and the lead wire of the second winding is electrically connected to the second connector; a rotary transformer is built into the end cover, one end of the rotating shaft is connected to the rotary transformer, and the other end of the rotating shaft passes out of the housing from the side of the housing away from the end cover; a rotor yoke is fastened to the rotating shaft, and a magnetic steel is sleeved on the outer periphery of the rotor yoke. The beneficial effects of the present invention are: by adopting the same-slot double winding, the motor effectively improves the high reliability of the motor under redundant backup while having the advantage of high power density, and a single motor can achieve independent operation.

Description

Technical Field

[0001] The invention relates to the field of permanent magnet synchronous motors, and in particular to a same-slot double-winding redundant permanent magnet synchronous motor. Background Art

[0002] The aerial dipping sonar is the main anti-submarine detection equipment of the Navy's anti-submarine helicopters, and the retractable system equipped on the helicopter is the key factor to ensure that the sonar equipment can be safely lowered for target detection and recovered normally after the mission is completed. As the decisive link for the sonar equipment to achieve the detection mission, the requirements for the retractable system are very strict. The motor, as the power unit of the retractable system, is a necessary condition for the retractable system to realize its functions. Therefore, there are strict requirements for the reliability of the motor. At the same time, as an aviation equipment, there are also strict requirements for the weight of the equipment. Therefore, the motor as the power mechanism of the retractable system should have high power density and high reliability.

[0003] For equipment with special reliability requirements, the power system often has a redundant design requirement. The redundant design of the power system realizes the backup function of the system power mechanism. The typical drive mechanism backup method adopts independent dual motor drive, such as the attached Figure 1 As shown, the dual-motor independent backup drive system has certain requirements on space and weight.

[0004] In some fields (such as aviation and aerospace), there are specific requirements for the overall weight, volume and reliability of the equipment. In order to achieve the overall performance indicators of the system, the weight and volume requirements must be met, and redundant equipment is required. The typical dual-motor independent backup drive type is often unable to adapt to special environments.

[0005] In order to meet the requirements of high power density and high reliability in special environments, people have designed a dual motor form with independent windings on the lower half of the motor. Figure 1 As shown, this type of dual motor has the characteristics of high power density, small size and light weight, and can meet the high power density requirements under specific environments. However, when one side of the motor is damaged, the motor on the other side cannot work normally and independently with high torque, and will produce large jitters during operation. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a same-slot double-winding redundant permanent magnet synchronous motor, so that the motor can meet the requirements of high power density, small size and light weight while improving the motor's redundant backup function and meeting the reliability requirements in motor design.

[0007] The objective of the present invention is achieved through the following technical solution: the same-slot double-winding redundant permanent magnet synchronous motor comprises a housing, a stator core, a first winding, a second winding, an insulating material, a rotating shaft, a rotor yoke, a magnetic steel, a rotary transformer and an end cover, the stator core with a groove is embedded in the housing and fixed, the first winding is fixed along the groove of the stator core, the second winding is also fixed along the groove of the stator core, and the second winding is wound around the outer periphery of the first winding; the insulating material is laid between the first winding and the second winding, so that the first winding is insulated relative to the second winding. ; The lead wire of the first winding is electrically connected to the first connector fixed on the casing to realize power input, and the lead wire of the second winding is electrically connected to the second connector fixed on the casing to realize power input; a rotary transformer mounting groove is opened in the end cover fixed on the casing for placing the rotary transformer, and the lead wire of the rotary transformer is electrically connected to the rotary transformer connector fixed on the casing to realize power input; one end of the rotating shaft is connected to the rotary transformer, and the other end of the rotating shaft passes through the casing from the side of the casing away from the end cover; the rotor yoke is fastened to the rotating shaft, and the outer peripheral sleeve of the rotor yoke is provided with magnetic steel.

[0008] As a further technical solution, one end of the rotating shaft connected to the rotary transformer is supported on the end cover through a bearing A.

[0009] As a further technical solution, one end of the rotating shaft passing through the casing is supported on the casing by a bearing B. A groove is provided on the casing near the bearing B, and the bearing cover is threadedly fixed in the groove to tighten the bearing B.

[0010] As a further technical solution, several groups of magnetic steel protection materials are arranged between the outer periphery of the magnetic steel and the stator core, and gaps are arranged between the magnetic steel and the magnetic steel protection materials.

[0011] As a further technical solution, a rotary transformer gland is fixed to the side of the end cover close to the rotary transformer by threads.

[0012] As a further technical solution, the end cover is fixedly connected to the casing by means of a hexagon socket screw thread, and a sealing ring is provided between the end cover and the casing.

[0013] The beneficial effects of the present invention are as follows: by adopting double windings in the same slot, the motor has the advantage of high power density, effectively improving the high reliability of the motor under redundant backup, and a single motor can achieve independent operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the existing independent dual-motor redundant drive.

[0015] Figure 2 This is a schematic diagram of the internal winding of an existing conventional motor.

[0016] Figure 3 It is a structural side view of the present invention.

[0017] Figure 4 for Figure 3 AA section view.

[0018] Figure 5 It is a top view of the structure of the present invention.

[0019] Figure 6 for Figure 5 BB cross-sectional view.

[0020] Figure 7 for Figure 6 A partial enlarged schematic diagram of the C area in the middle.

[0021] Explanation of the accompanying drawings: casing 1, stator core 2, groove 2-1, first winding 3, second winding 4, insulating material 5, rotating shaft 6, rotor yoke 7, magnet 8, magnet protection material 9, rotating transformer 10, rotating transformer cover 11, end cover 12, bearing cover 13, hexagon socket screw 14, first connector 15, second connector 16, rotating transformer connector 17, bearing A 18, bearing B 19, groove 20, sealing ring 21. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings:

[0023] Example: As attached Figures 3 to 7 As shown, this same-slot double-winding redundant permanent magnet synchronous motor includes a housing 1, a stator core 2, a first winding 3, a second winding 4, an insulating material 5, a rotating shaft 6, a rotor yoke 7, a magnetic steel 8, a rotary transformer 10 and an end cover 12. The stator core 2 with a groove 2-1 is embedded in the housing 1 and fixed, the first winding 3 is fixed along the groove 2-1 of the stator core 2, the second winding 4 is also fixed along the groove 2-1 of the stator core 2, and the second winding 4 is wound around the outer periphery of the first winding 3; as shown in FIG. Figure 6 , 7 As shown, the insulating material 5 is laid between the first winding 3 and the second winding 4 to insulate the first winding 3 from the second winding 4; the lead wire of the first winding 3 is electrically connected to the first connector 15 fixed on the casing 1 to realize power input, and the lead wire of the second winding 4 is electrically connected to the second connector 16 fixed on the casing 1 to realize power input; a rotary transformer mounting groove is provided in the end cover 12 fixed on the casing 1 for placing the rotary transformer 10, and the lead wire of the rotary transformer 10 is electrically connected to the rotary transformer connector 17 fixed on the casing 1 to realize power input; one end of the rotating shaft 6 is connected to the rotary transformer 10, and the other end of the rotating shaft 6 passes through the casing 1 from the side of the casing 1 away from the end cover 12 to the outside; the rotor yoke 7 is fastened to the rotating shaft 6, and the outer periphery of the rotor yoke 7 is provided with a magnetic steel 8.

[0024] Reference Figure 4 , one end of the rotating shaft 6 connected to the rotary transformer 10 is supported on the end cover 12 through the bearing A18; the end of the rotating shaft 6 passing through the casing 1 is supported on the casing 1 through the bearing B19, and a groove 20 is provided on the casing 1 near the bearing B19, and the bearing cover 13 is threadedly fixed in the groove 20 for pressing the bearing B19. Several groups of magnetic steel protection materials 9 are arranged between the outer periphery of the magnetic steel 8 and the stator core 2, and a gap is arranged between the magnetic steel 8 and the magnetic steel protection materials 9. A rotary transformer gland 11 is threadedly fixed on the side of the end cover 12 near the rotary transformer 10. The end cover 12 is threadedly fixed to the casing 1 by the hexagon socket screw 14, and a sealing ring 21 is arranged between the end cover 12 and the casing 1.

[0025] Working process of the present invention: The present invention winds two sets of independent windings (first winding 3, second winding 4) on the groove 2-1 of the same stator core 2, such as Figure 4 , 6 , 7, and the first winding 3 and the second winding 4 are relatively insulated by laying insulating material 5 to ensure non-interference during operation; the lead-out line of the first winding 3 is independently connected to the external control device through the first connector 15 to achieve separate power supply control, and at the same time, the lead-out line of the second winding 4 is also independently connected to the external control device through the second connector 16 to achieve separate power supply control; two sets of windings are built into one motor to back up each other, thereby ensuring dual-motor redundant operation in normal mode. After a single motor fails, the independent motor (winding) on ​​the normal side has the working capacity of a single motor.

[0026] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the protection scope of the claims attached to the present invention.

Claims

1. A same-slot double-winding redundant permanent magnet synchronous motor, Features: The invention comprises a housing (1), a stator core (2), a first winding (3), a second winding (4), an insulating material (5), a rotating shaft (6), a rotor yoke (7), a magnetic steel (8), a rotary transformer (10) and an end cover (12); the stator core (2) with a groove (2-1) is embedded in the housing (1) and fixed; the first winding (3) is fixed along the groove (2-1) of the stator core (2); the second winding (4) is also fixed along the groove (2-1) of the stator core (2); and the second winding (4) is wound around the outer periphery of the first winding (3); the insulating material (5) is laid between the first winding (3) and the second winding (4) so ​​that the first winding (3) is insulated from the second winding (4); the lead wire of the first winding (3) The first connector (15) is electrically connected to the housing (1) to realize power input, and the lead wire of the second winding (4) is electrically connected to the second connector (16) fixed to the housing (1) to realize power input; a rotary transformer installation groove is provided in the end cover (12) fixed to the housing (1) for placing the rotary transformer (10), and the lead wire of the rotary transformer (10) is electrically connected to the rotary transformer connector (17) fixed to the housing (1) to realize power input; one end of the rotating shaft (6) is connected to the rotary transformer (10), and the other end of the rotating shaft (6) passes out of the housing (1) from a side of the housing (1) away from the end cover (12); the rotor yoke (7) is fastened to the rotating shaft (6), and the outer periphery of the rotor yoke (7) is provided with a magnetic steel (8).

2. The same-slot double-winding redundant permanent magnet synchronous motor according to claim 1, Features: One end of the rotating shaft (6) connected to the rotary transformer (10) is supported on the end cover (12) via a bearing A (18).

3. The same-slot double-winding redundant permanent magnet synchronous motor according to claim 1, Features: One end of the rotating shaft (6) passing through the casing (1) is supported on the casing (1) via a bearing B (19); a groove (20) is provided on the casing (1) at a position close to the bearing B (19); and a bearing cover (13) is threadedly fixed in the groove (20) for pressing the bearing B (19).

4. The same-slot double-winding redundant permanent magnet synchronous motor according to claim 1, Features: A plurality of groups of magnetic steel protection materials (9) are arranged between the outer periphery of the magnetic steel (8) and the stator core (2), and a gap is arranged between the magnetic steel (8) and the magnetic steel protection materials (9).

5. The same-slot double-winding redundant permanent magnet synchronous motor according to claim 1, Features: A rotary transformer gland (11) is fixed to a side of the end cover (12) close to the rotary transformer (10) via threads.

6. The same-slot double-winding redundant permanent magnet synchronous motor according to claim 1, Features: The end cover (12) is fixedly connected to the casing (1) via threads, and a sealing ring (21) is provided between the end cover (12) and the casing (1).

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