An external rotor reluctance synchronous machine device

Abstract

The utility model relates to electromagnetic electric technology field especially relates to a kind of outer rotor reluctance synchronous motor device, including rotor, stator and driver, the rotor is set in stator outer and is supported connection by bearing, stator includes stator core, stator support, stator core fixedly sets on the shaft sleeve of stator support left end portion, the coil is wound on each stator tooth slot of stator core, driver fixed mounting is in stator support right end side and with the coil electricity is connected, heat bridge is set between the coil of stator core right side, i.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic electric technology, and in particular to an external rotor reluctance synchronous motor device. Background Technology

[0002] In existing technologies, permanent magnet synchronous motors are gradually replacing AC asynchronous motors in market applications due to their superior performance and efficiency. However, permanent magnets require rare earth materials, whose prices remain high and fluctuate greatly, thus restricting the widespread adoption of permanent magnet synchronous motors.

[0003] In existing external rotor permanent magnet synchronous motors, the stator core and stator windings are surrounded by the external rotor. The heat generated by the iron loss of the stator core and the copper loss of the stator windings cannot be dissipated. Instead, it can only be dissipated through conduction from the core to the stator support. This conduction path is long, the thermal resistance is high, and the conduction efficiency is low. This increases the operating temperature rise of the stator core and the stator thermal resistance, reduces the motor's operating efficiency, and shortens the motor's lifespan. Utility Model Content

[0004] To address the aforementioned technical problems in the existing technology, this utility model proposes an external rotor reluctance synchronous motor device, the specific technical solution of which is as follows: An external rotor reluctance synchronous motor device includes a rotor, a stator, and a driver. The rotor is disposed outside the stator and is supported and connected by bearings. The stator includes a stator core and a stator support. The stator core is fixedly sleeved on the outer side of the left end of the stator support. Coils are wound on each stator slot of the stator core. The driver is fixedly installed on the right end of the stator support and is electrically connected to the coils. A thermal bridge is provided between the coils and the stator support on the right side of the stator core, i.e., the side near the driver. The heat generated by the stator core and the coils is directly transferred to the stator support through the thermal bridge to achieve efficient heat dissipation.

[0005] Furthermore, the rotor includes a rotor housing, a rotor core, a fan, a rotor insert, and a rotating shaft; the rotor core is fixed to the inner wall of the rotor housing and is correspondingly arranged with respect to the stator core; the left end of the stator support is provided with a shaft hole and is connected to the rotating shaft by an interference fit through a bearing; the rotor insert is embedded in the end opening of the shaft hole of the stator support and connects the rotating shaft to the rotor housing; the fan is located on the left side of the stator core and is mounted on the rotor insert.

[0006] Furthermore, the rotor core is pressed into the inner wall of the rotor housing by bonding and / or interference fit.

[0007] Furthermore, the rotor core is provided with a plurality of magnetic circuits, the number of which is set according to the number of stator slots.

[0008] Furthermore, the rotor core is provided with angled magnets.

[0009] Furthermore, the angled magnet is a single piece of magnet.

[0010] Furthermore, the oblique magnet includes an upper oblique magnet and a lower oblique magnet, which are glued and fixedly connected.

[0011] Furthermore, the bearing includes a left bearing and a right bearing, which are located on the left and right sides of the shaft hole respectively, and the outer rings of the bearings are interference-fitted with the shaft hole. The rotating shaft is connected to the inner rings of both the left and right bearings.

[0012] Furthermore, the thermal bridge is disposed between the coil and the stator support by means of potting adhesive.

[0013] Furthermore, the thermal bridge is a molded thermal conductive sheet, which is attached between the coil and the stator support.

[0014] The beneficial effects of this invention are as follows: This invention uses external rotor reluctance synchronous motor technology to replace the permanent magnets in permanent magnet synchronous motors. Since permanent magnets are not required, the material and manufacturing costs of the motor are reduced. Simultaneously, the application of thermal bridge technology shortens the conduction path by approximately 80%, rapidly reducing the motor's operating temperature, lowering the stator temperature rise by 8°C, increasing motor efficiency by 2%, and extending motor lifespan by 80%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an external rotor reluctance synchronous motor device according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the stator and rotor structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the heat conduction path of an external rotor reluctance synchronous motor with a thermal bridge according to an embodiment of this utility model. Figure 4 This is a schematic diagram of the heat conduction path of an external rotor reluctance synchronous motor without a thermal bridge, according to an embodiment of this utility model. In the diagram, 1—rotor housing; 2—rotor core; 3—stator core; 4—stator winding; 5—stator support; 6—driver; 7—fan; 8—rotor insert; 9—shaft; 10—left bearing; 11—right rear bearing; 12—left flange; 13—right flange; 14—thermal bridge; 15—heat conduction path with thermal bridge; 16—heat conduction path without thermal bridge; 21—outer ring of rotor core; 22—middle ring of rotor core; 23—inner ring of rotor core; 31—first stator core; 22—second stator core; 23—third stator core. Detailed Implementation

[0016] To make the objectives, technical solutions, and technical effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 As shown, an external rotor reluctance synchronous motor device according to this embodiment includes a rotor, a stator, and a driver 6.

[0018] The rotor includes a rotor housing 1, a rotor core 2, a fan 7, a rotor insert 8, and a bearing 9. The outer surface of the rotor housing 1 is provided with a left flange 12 and a right flange 13 for connecting and fixing mechanical devices. The rotor core 2 is pressed into the inner wall of the rotor housing 1 by bonding and / or interference fit, but is not limited thereto.

[0019] The stator includes a stator core 3 and a stator bracket 5. The stator core 3 is fixedly fitted onto the left end bushing of the stator bracket 5 and corresponds to the rotor core 2. Coils 4 are wound around each stator tooth of the stator core 3. The driver 6 is fixedly installed on the right end side of the stator bracket 5, and the power wires and communication wires of the driver 6 are connected to the coils 4 through the through holes of the stator bracket. The left end bushing of the stator bracket 5 has a shaft hole and is connected to the rotating shaft 9 by an interference fit through a left bearing 10 and a right bearing 11. The rotor insert 8 is embedded in the end opening of the shaft hole of the stator bracket 5 and connects the rotating shaft 9 to the rotor housing 1. The fan 7 is located on the left side of the stator core 3 and is mounted on the rotor insert 8.

[0020] The rotor core 2 is provided with several magnetic circuits, the number of which is set according to the number of stator slots. For example... Figure 2 As shown, the magnetic circuit of the rotor core 2 includes an outer ring 21, a middle ring 22, and an inner ring 23. The stator core 3 has a first stator core 31, a second stator core 32, and a third stator core 33, corresponding to the number of the outer ring 21, the middle ring 22, and the inner ring 23 of the rotor core.

[0021] The rotor core 2 is provided with angled magnets, which are embedded or pasted on the surface or inside of the rotor core. The angled magnets can be a single piece of magnet or can be composed of upper and lower angled magnets. The upper and lower angled magnets are fixedly connected by adhesive bonding, but not limited to adhesive bonding.

[0022] A thermal bridge 14 is provided between the coil 4 and the stator support 5 near the driver 6. This thermal bridge 14 directly transfers the heat generated by the stator core 3 and the coil 4 to the stator support 5 for efficient heat dissipation. The thermal bridge 14 can be implemented using potting compound, molded thermal pads, or other methods. Figure 3As shown, the heat-conducting bridge 14 allows the heat generated by the iron loss of the stator core 3 and the copper loss of the coil 4 during operation to be directly transferred to the stator support 5 through the heat conduction path 15, for example... Figure 4 The heat conduction path 16 without thermal bridge 14 shown is shortened by about 80%, which reduces the stator temperature rise by 8°C, increases the motor efficiency by 2%, and increases the motor service life by 80%.

[0023] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Although the implementation process of this utility model has been described in detail above, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. All modifications and equivalent substitutions made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly. In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. An external rotor reluctance synchronous motor device, comprising a rotor, a stator, and a driver (6), wherein the rotor is disposed outside the stator and supported and connected by bearings, characterized in that, The stator includes a stator core (3) and a stator support (5). The stator core (3) is fixedly sleeved on the left end bushing of the stator support (5). Coils (4) are wound on each stator tooth slot of the stator core (3). The driver (6) is fixedly installed on the right end of the stator support (5) and electrically connected to the coils (4). A thermal bridge (14) is provided between the coils (4) on the right side of the stator core (3), i.e. the side near the driver (6), and the stator support (5). The heat generated by the stator core (3) and the coils (4) is directly transferred to the stator support (5) through the thermal bridge (14) for heat dissipation.

2. The external rotor reluctance synchronous motor device as described in claim 1, characterized in that, The rotor includes a rotor housing (1), a rotor core (2), a fan (7), a rotor insert (8), and a shaft (9). The rotor core (2) is fixed to the inner wall of the rotor housing (1) and is correspondingly arranged with the stator core (3); the left end of the stator support (5) has a shaft hole and is connected to the rotating shaft (9) by an interference fit through a bearing; the rotor insert (8) is embedded in the end opening of the shaft hole of the stator support (5) and connects the rotating shaft (9) to the rotor housing (1); the fan (7) is located on the left side of the stator core (3) and is installed on the rotor insert (8).

3. The external rotor reluctance synchronous motor device as described in claim 2, characterized in that, The rotor core (2) is pressed into the inner wall of the rotor housing (1) by bonding and / or interference fit.

4. The external rotor reluctance synchronous motor device as described in claim 2, characterized in that, The rotor core (2) is provided with several magnetic circuits, and the number of magnetic circuits is set according to the number of stator slots.

5. The external rotor reluctance synchronous motor device as described in claim 2, characterized in that, The rotor core (2) is provided with angled magnets.

6. The external rotor reluctance synchronous motor device as described in claim 5, characterized in that, The angled magnet is a single piece of magnet.

7. The external rotor reluctance synchronous motor device as described in claim 5, characterized in that, The oblique magnet includes an upper oblique magnet and a lower oblique magnet, which are glued and fixedly connected.

8. The external rotor reluctance synchronous motor device as described in claim 2, characterized in that, The bearings include a left bearing (10) and a right bearing (11), which are located on the left and right sides of the shaft hole respectively, and the outer rings of the bearings are interference-fitted with the shaft hole. The rotating shaft (9) is connected to the inner rings of the left bearing (10) and the right bearing (11) at the same time.

9. The external rotor reluctance synchronous motor device as described in claim 1, characterized in that, The thermal bridge (14) is set between the coil (4) and the stator support (5) by potting glue.

10. The external rotor reluctance synchronous motor device as described in claim 1, characterized in that, The heat-conducting bridge (14) is made of a molded heat-conducting sheet, which is attached between the coil (4) and the stator support (5).

Images