A marine low-speed direct-drive permanent magnet motor

Abstract

The utility model discloses a marine low -speed direct drive permanent -magnetic motor belongs to permanent magnet synchronous motor technical field, including stator, rotor lamination and its stator, rotor, the stator lamination adopts rectangular slot structure, the rotor lamination adopts V -shaped magnetic steel slot group, has the motor shaft hole of being located in the center, the weight -reducing heat dissipation hole of circumferential arrangement, the pressing plate screw rod connecting hole, the gap magnetism aluminum plate screw rod connecting hole, the stator adopts the forming winding, and the insulation withstand voltage grade is high, the rotor both ends are provided with the inner fan, and the heat dissipation performance is good. The utility model improves permanent -magnetic motor low -speed big torque output characteristic, efficiency and heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet synchronous motors, and in particular to a marine low-speed direct-drive permanent magnet motor. Background Technology

[0002] With the continuous improvement and advancement of motor design technology and power electronics technology, marine electric propulsion systems have become a rapidly developing and highly regarded research field. The main power source of marine electric propulsion systems is the propulsion motor. Traditional ships widely use diesel propulsion systems, which operate at relatively high speeds and require gearboxes to ensure the propeller operates at its optimal state. As a result, these ships have lower operating efficiency and higher noise and vibration levels.

[0003] Permanent magnet synchronous direct drive motors, as low-speed, high-torque electromagnetic drive devices, have a very broad application prospect in fields such as marine propulsion. Direct drive technology eliminates transmission devices such as gearboxes, reducing mechanical losses and improving system efficiency and reliability. Direct drive also reduces mechanical vibration and noise, improving ship comfort. Marine propulsion motors need to have a compact design and high efficiency to adapt to limited cabin space and long-duration voyages.

[0004] To meet the development requirements of all-electric propulsion ships, a marine low-speed direct-drive permanent magnet motor is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a marine low-speed direct-drive permanent magnet motor. Its innovation lies in improving the stator laminations, rotor laminations and the structure of the stator and rotor, which has good heat dissipation, high efficiency, strong load capacity and high insulation withstand voltage level.

[0006] The technical solution adopted in this utility model is as follows: a marine low-speed direct-drive permanent magnet motor, which improves the stator laminations, rotor laminations and the structure of the stator and rotor. The low-speed direct-drive permanent magnet motor includes stator laminations and rotor laminations; the slots of the stator laminations are rectangular slots, and the outer edges of the stator laminations are provided with dovetail slots; the rotor laminations adopt V-shaped magnet slot groups, which are composed of a first magnet slot, a second magnet slot and a third magnet slot, and the first magnet slot and the third magnet slot are symmetrical and congruent.

[0007] Furthermore, the width A of the rectangular groove of the stator lamination is 11.5 mm, and the height B is 69.5 mm.

[0008] Furthermore, a rectangular marking groove is provided at one point of the dovetail groove of the fastener for positioning during stamping and stacking.

[0009] Furthermore, the length of the first and second magnetic steel channels is C=E=27.6mm, the width is D=F=6.8mm, and the included angle between the first and third magnetic steel channels is 2xG=130°.

[0010] Furthermore, the rotor laminations have a centrally located motor shaft hole, circumferentially arranged weight-reducing and heat-dissipating holes, pressure plate screw connection holes, and magnetic shielding aluminum plate screw connection holes.

[0011] Furthermore, the low-speed direct-drive permanent magnet motor also includes a stator and a rotor; the stator is formed by stacking stator laminations, and the rotor is formed by stacking rotor laminations.

[0012] Furthermore, the stator is equipped with shaped windings. The rectangular slots of the stator laminations are embedded in the shaped windings, which have a flat wire structure and are wrapped with mica tape for anti-corona treatment. This ensures the stator's insulation performance, achieves high slot fill factor, reduces copper losses, shortens end lengths, reduces eddy current losses, and improves motor efficiency.

[0013] Furthermore, the first, second, and third magnet slots of the V-shaped magnet slot group of the rotor lamination are respectively embedded with the first, second, and third magnets, and internal fans are installed at both ends. The first, second, and third magnets embedded in the V-shaped magnet slot group have consistent dimensions and performance, improving the magnet installation efficiency.

[0014] Furthermore, internal fans are installed at both ends of the rotor to help dissipate heat from the rotor magnets and the ends of the stator windings.

[0015] The beneficial effects of this utility model are: This utility model effectively solves the design difficulties of marine low-speed direct-drive permanent magnet motors, which require high power, low speed, high efficiency, strong load-carrying capacity, and high insulation withstand voltage level, thus meeting the special working environment and requirements of ships. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the stator lamination and rotor lamination structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the stator lamination structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the rotor lamination structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the stator structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the rotor structure of this utility model.

[0021] In the diagram: 1-Stator lamination, 2-Rotor lamination, 3-Rectangular slot, 4-Dovetail slot for lamination, 5-V-shaped magnet slot group, 6-Motor shaft hole, 7-Weight reduction and heat dissipation hole, 8-Pressure plate lead screw connection hole, 9-Magnetic shielding aluminum plate lead screw connection hole, 10-Rectangular marking slot, 11-First magnet slot, 12-Second magnet slot, 13-Third magnet slot, 14-Internal fan, 15-Formed winding, 16-Stator, 17-Rotor. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figure 1-3 As shown, this utility model provides stator and rotor laminations for a marine low-speed direct-drive permanent magnet motor. The stator lamination 1 has a rectangular slot 3 with a width A = 11.5 mm and a height B = 69.5 mm. The outer edge of the stator lamination 1 is provided with a dovetail groove 4 for fastening. A rectangular marking groove 10 is provided at one point of the dovetail groove 4 for stamping and lamination positioning. The rotor lamination 2 employs a V-shaped magnet slot group 5, which consists of a first magnet slot 11, a second magnet slot 12, and a third magnet slot 13. The first magnet slot 11 and the third magnet slot 13 are symmetrical and congruent. The length of the first magnet slot 11 and the second magnet slot 12 is C=E=27.6mm, and the width is D=F=6.8mm. The included angle between the first magnet slot 11 and the third magnet slot 13 is 2xG=130°. The rotor lamination 22 has... The motor shaft hole 6 is located in the center, and the weight-reducing heat dissipation holes 7, pressure plate screw connection holes 8, and magnetic shielding aluminum plate screw connection holes 9 are arranged around the circumference. The weight-reducing heat dissipation holes 7 can improve the heat dissipation effect of the rotor magnets and reduce the weight of the rotor. The pressure plate screw connection holes 8 can connect the pressure plates at both ends through screws to press the rotor laminations and make the iron core more solid. The pressure plate screw connection holes 8 can connect the magnetic shielding aluminum plates at both ends through screws to cover the permanent magnets, prevent magnetic leakage, enhance structural strength, and at the same time help dissipate heat from the magnets.

[0024] like Figure 4-5As shown, this utility model also provides a stator and rotor for a marine low-speed direct-drive permanent magnet motor. The stator 16 is formed by stacking stator laminations 1, with rectangular slots 3 embedded in shaped windings 15. The shaped windings 15 can be wrapped with mica tape for anti-corona treatment, ensuring the insulation performance of the stator 16. The flat wire structure of the shaped windings 15 can achieve high slot fill factor, reduce copper loss, shorten end length, reduce eddy current loss, and improve motor efficiency. The rotor 17 is formed by stacking rotor laminations 2, with the first magnet slot 11, second magnet slot 12, and third magnet slot 13 of the V-shaped magnet slot group 5 embedded with the first magnet, second magnet, and third magnet, respectively. Internal fans are provided at both ends. The first magnet, second magnet, and third magnet embedded in the V-shaped magnet slot group 5 have consistent dimensions and performance, improving magnet installation efficiency. Internal fans 14 are provided at both ends of the rotor 17 to help dissipate heat from the rotor magnets and the ends of the stator windings.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A marine low-speed direct-drive permanent magnet electric machine, characterized in that: Improved stator laminations, rotor laminations, and the structure of the stator and rotor; low-speed direct-drive permanent magnet motor includes stator laminations and rotor laminations; the stator laminations adopt rectangular slots, and the outer edge of the stator laminations is provided with dovetail slots; the rotor laminations adopt V-shaped magnet slot groups, which are composed of a first magnet slot, a second magnet slot, and a third magnet slot, and the first magnet slot and the third magnet slot are symmetrical and congruent.

2. A low-speed direct-drive permanent magnet electric machine for marine use according to claim 1, characterized in that: The width A of the rectangular slot of the stator lamination is 11.5 mm, and the height B is 69.5 mm.

3. A low speed direct drive permanent magnet electric machine for marine use according to claim 2, characterized in that: A rectangular marking groove is provided at one point of the dovetail groove for stamping and stacking positioning.

4. A low speed direct drive permanent magnet electric machine for marine use according to claim 3, characterized in that: The length of the first and second magnetic steel channels is C=E=27.6mm, the width is D=F=6.8mm, and the included angle between the first and third magnetic steel channels is 2xG=130°.

5. A low speed direct drive permanent magnet electric machine for marine use according to claim 4, characterized in that: The rotor laminations have a motor shaft hole located in the center, and weight-reducing and heat-dissipating holes arranged in a circle, as well as screw connection holes for pressure plates and screw connection holes for magnetic shielding aluminum plates.

6. A low speed direct drive permanent magnet electric machine for marine use according to claim 5, characterized in that: Low-speed direct-drive permanent magnet motors also include a stator and a rotor; the stator is made of stator laminations and the rotor is made of rotor laminations.

7. A low speed direct drive permanent magnet marine electric machine according to claim 6, characterized in that: The stator is equipped with a shaped winding. The rectangular slots of the stator laminations are embedded in the shaped winding. The shaped winding has a flat wire structure and is wrapped with mica tape for anti-corona treatment.

8. A low speed direct drive permanent magnet electric machine for marine use according to claim 7, characterized in that: The first, second, and third magnet slots of the V-shaped magnet slot group of the rotor lamination are embedded with the first, second, and third magnets, respectively, and internal fans are provided at both ends.

9. A low speed direct drive permanent magnet marine electric machine according to claim 8, characterized in that: Internal fans are installed at both ends of the rotor.

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