Frequency converter integrated permanent magnet motor

Abstract

The utility model relates to a frequency converter integrated type permanent magnet motor, and relates to the technical field of permanent magnet motors, the frequency converter integrated type permanent magnet motor comprises a motor body and a frequency converter arranged on the motor body, the end side of the motor body is provided with a heat dissipation cover, and the heat dissipation cover covers one end, away from an output shaft, of the motor body; the motor comprises a motor body, a heat dissipation cover is arranged in the motor body, fan blades are rotatably arranged in the heat dissipation cover, the fan blades are in transmission connection with a rotating shaft of the motor body, heat dissipation holes are formed in the heat dissipation cover, a plugging plate is rotatably arranged on the heat dissipation cover, a first communication hole is formed in the plugging plate, and the first communication hole is movably communicated with the heat dissipation holes. And an adjusting assembly for rotationally adjusting the plugging plate is further arranged in the heat dissipation cover. The size of the air inlet can be conveniently adjusted according to the actual rotating speed of the permanent magnet motor, so that the heat dissipation efficiency is matched with the rotating speed of the motor, and the energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the technical field of permanent magnet motors, and in particular to a permanent magnet motor with an integrated frequency converter. Background Technology

[0002] Currently, permanent magnet motors mainly consist of components such as a stator, rotor, and end covers. The stator is made of laminated laminations to reduce iron losses during motor operation and contains three-phase AC windings called the armature. The rotor can be made in a solid form or made of laminated laminations, and it is fitted with permanent magnet material.

[0003] Since the speed of a permanent magnet motor is proportional to the frequency of the power supply and the torque is also proportional to the current, the speed and torque of the motor can be precisely controlled by changing the frequency and voltage of the power supply. Therefore, under normal circumstances, a frequency converter is used to precisely adjust and control the speed of the motor.

[0004] A Chinese patent document with publication number CN220754563U discloses a self-cooled permanent magnet synchronous motor with integrated motor drive, including a motor, an output shaft arranged axially on the motor, heat sinks distributed circumferentially on the motor, heat sink fins distributed on the end face of the motor away from the output shaft, a heat dissipation unit covered on the side of the motor away from the output shaft, a control slot opened on the top of the motor, a frequency conversion drive unit inserted in the control slot, and the frequency conversion drive unit electrically connected to the motor and the heat dissipation unit.

[0005] Regarding the aforementioned technologies, permanent magnet motors and frequency converters generate a large amount of heat during operation, thus requiring heat dissipation. The fan rotation speed is related to the motor speed. If the size of the air inlet remains constant, a small air inlet can easily affect heat exchange efficiency, while a large air inlet can easily increase the pressure loss of the cooling system, leading to increased energy consumption. Therefore, improvements are needed. Utility Model Content

[0006] In order to facilitate the adjustment of the air inlet size according to the actual speed of the permanent magnet motor, so as to match the heat dissipation efficiency with the motor speed and reduce energy consumption, this application provides a permanent magnet motor with integrated frequency converter.

[0007] The technical solution for the inverter-integrated permanent magnet motor provided in this application is as follows:

[0008] An integrated frequency converter permanent magnet motor includes a motor body and a frequency converter mounted on the motor body. A heat sink is provided on one end of the motor body, covering the end of the motor body away from the output shaft. A fan blade is rotatably mounted inside the heat sink and is connected to the rotating shaft of the motor body. The heat sink has heat dissipation holes and a sealing plate is rotatably mounted on the heat sink. The sealing plate has a first connecting hole that is movably connected to the heat dissipation holes. An adjustment component for rotating and adjusting the sealing plate is also provided inside the heat sink.

[0009] By adopting the above technical solution, since the motor operates at a constant speed under normal circumstances, the frequency converter needs to maintain a stable output frequency to ensure stable heat dissipation efficiency at the current motor operating frequency. By rotating the sealing plate, the setting adjustment component adjusts the rotation of the sealing plate when the motor rotates, thereby adjusting the area where the heat dissipation port coincides with the first connecting hole. This adjusts the air intake at the air inlet according to the current motor speed, thus adapting to the heat dissipation efficiency under the current motor operating state, reducing energy consumption while improving the overall heat dissipation efficiency of the motor.

[0010] The air intake volume can be adjusted by adjusting the overlapping area of ​​the first connecting hole and the heat dissipation hole through the adjustment component.

[0011] Optionally, the adjustment assembly includes a rotating cylinder located at the rotation axis of the sealing plate, a torsion spring located at the rotation center, and an adjustment component for adjusting the rotation angle of the sealing plate. The rotating cylinder is coaxially arranged with the rotation axis of the motor body.

[0012] By adopting the above technical solution, the angle of the rotating cylinder is adjusted by the adjustable component. When the motor is not working, the rotating cylinder rotates under the elastic restoring force of the torsion spring. This minimizes the overlap between the heat dissipation vent and the first connecting hole when the motor is not working, thereby reducing the air intake and dust entry, and achieving dust prevention for the fan blades.

[0013] Optionally, the adjusting component includes an adjusting block slidably disposed on the rotating cylinder, the rotating cylinder having a rotating groove, the adjusting block having the same radial direction as the rotating cylinder, one side wall of the adjusting block being inclined, the inclined side of the adjusting block being movably fitted with the inner side wall of the rotating groove, and a sliding component for sliding adjustment of the adjusting block being provided inside the heat sink.

[0014] By adopting the above technical solution, when it is necessary to adjust the air intake volume, the adjusting block is slidable by the sliding component. Since the inclined side of the adjusting block is in close contact with the inner wall of the rotating groove, the rotating cylinder and the sealing plate are rotated as the adjusting block slides, thereby realizing the rotation adjustment of the sealing plate. The rotation angle of the sealing plate is adjusted by adjusting the sliding length of the adjusting block.

[0015] Optionally, the fan blade's shaft extends movably into the rotating cylinder, and the sliding member includes a sliding block elastically slidably disposed on the shaft. The end side of the sliding block movably protrudes from the shaft, and the protruding end side of the sliding block movably fits against the end side of the adjusting block located on the rotating cylinder.

[0016] By adopting the above technical solution, since the rotational speed of the fan blades is related to the rotational speed of the motor body shaft, the difference in the rotational speed of the fan blades results in a difference in the magnitude of the centrifugal force generated during rotation, thereby changing the length of the extended sliding block. Since one end of the extended sliding block is in contact with the end of the adjusting block, the adjusting block is adjusted when the sliding block is extended, thereby adjusting the rotation angle of the rotating cylinder and the sealing plate, and realizing the adjustment of the air intake volume according to the difference in rotational speed.

[0017] Optionally, a limiting block is slidably disposed inside the heat sink cover. A snap-fit ​​groove is provided on the side of the limiting block away from the inner wall of the heat sink cover. A snap-fit ​​block is provided at the end of the adjusting block away from the motor body. Multiple sets of snap-fit ​​blocks are provided. The multiple sets of snap-fit ​​blocks are movably snap-fitted and adapted to the snap-fit ​​groove. Furthermore, a clamping member is provided inside the heat sink cover for sliding adjustment of the limiting block.

[0018] By adopting the above technical solution, since the integrated motor operates at a constant speed under normal working conditions, the motor speed needs to be adjusted by the frequency converter each time the usage scenario is changed. Under the same usage conditions, the motor speed is basically the same, and thus the fan blade rotation speed is also basically the same. At the current rotation speed, the position of the adjusting block is fixed by the sliding limit block and the opening snap-fit ​​groove, thereby maintaining a stable air intake at the current motor rotation speed, reducing the vibration caused by the collision between the adjusting block and the sliding block during the operation of the motor body, and improving the stability of the motor body's working process and heat dissipation process.

[0019] Optionally, the abutting member includes an abutting block disposed on the inner wall of the heat sink cover. The abutting block is an electromagnet. A wire is embedded in the heat sink cover. A first contact is provided at one end of the heat sink cover near the motor body. A second contact is provided on the motor body. The first contact and the second contact are movably fitted together. The electromagnet is electrically connected to the motor body through the wire, the first contact, and the second contact. The abutting block is magnetically connected to the limiting block.

[0020] By adopting the above technical solution, when the permanent magnet motor is not working, there is no electricity in the wires, so the pressing block has no magnetic force. This allows the limiting block to be separated from the adjusting block. At this time, the sealing plate rotates to the position with the minimum air intake under the elastic restoring force of the torsion spring, thereby preventing dust from entering the heat sink through the heat dissipation holes and adhering to the fan blades, which affects the heat dissipation efficiency and reduces energy consumption.

[0021] When the motor body is working, the first contact and the second contact conduct electricity to energize the pressing block, so that the limiting block slides to the position corresponding to the adjusting block. At this time, during the operation of the motor body, the sliding block extends out of the fan blade shaft under the action of centrifugal force and presses against the adjusting block, so that the rotating cylinder and the sealing plate rotate.

[0022] Optionally, the fan blade's rotating shaft is movably sleeved on the motor body's rotating shaft. The fan blade's rotating shaft is provided with a key block, and the motor body's rotating shaft is provided with a keyway. The key block and the keyway are engaged and adapted to each other.

[0023] By adopting the above technical solution, and through the matching of the keyway and key block, the motor body drives the fan blades to rotate when it is working, thereby realizing the synchronous rotation of the fan blades and the motor body shaft, and achieving heat dissipation with different efficiencies at different rotation speeds.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By using the heat sink, the heat dissipation holes on the heat sink, and the rotating sealing plate on the heat sink, when it is necessary to adjust the air intake volume according to the speed of the motor body, the overlapping area between the first connecting hole and the heat dissipation hole on the sealing plate is adjusted by rotating the sealing plate, thereby adjusting the air intake volume.

[0026] 2. By using the rotating cylinder, the rotating groove on the rotating cylinder, and the sliding adjustment block, when it is necessary to adjust the air intake volume, the inclined side of the adjustment block is pressed against the side wall of the rotating groove by sliding the adjustment block, thereby driving the rotating cylinder to rotate, and thus realizing the adjustment of the air intake volume.

[0027] 3. By sliding the sliding block on the fan blade rotation shaft, when the fan blade rotates with the motor shaft, the centrifugal force causes the sliding block to protrude from the motor shaft, thereby pressing the sliding block against the adjusting block and driving the rotating cylinder to rotate, thus realizing the adjustment of the air intake volume. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the connection structure of the motor body, heat sink, and fan blades;

[0030] Figure 3 This is a schematic diagram of the connection structure of the motor body, heat sink, and fan blades from another perspective.

[0031] Figure 4 This is a schematic diagram of the connection structure of the sealing plate and the adjusting block;

[0032] Figure 5 yes Figure 3 A schematic diagram of the connection structure between parts B and C.

[0033] Reference numerals: 1. Motor body; 11. Inverter; 12. Heat sink; 13. Fan blade; 14. Heat dissipation hole; 15. First connecting hole; 16. Sealing plate; 2. Adjustment assembly; 21. Rotating cylinder; 22. Torsion spring; 23. Adjusting component; 231. Adjusting block; 232. Rotating groove; 24. Sliding component; 241. Sliding block; 25. Limiting block; 251. Snap-fit ​​groove; 252. Snap-fit ​​block; 26. Abutting component; 261. Abutting block; 262. Wire; 263. First contact; 264. Second contact; 3. Key block; 31. Keyway. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses an integrated permanent magnet motor with a frequency converter 11. (Refer to...) Figure 1 A permanent magnet motor integrated with a frequency converter 11 includes a motor body 1 and a heat sink 12 fixed to the side of the motor body 1 away from its output end by bolts. The frequency converter 11 is fixedly and electrically connected to the outer wall of the motor body 1. The heat sink 12 has multiple sets of heat dissipation holes 14. The multiple sets of heat dissipation holes 14 are evenly distributed along the circumference of the heat sink 12, and there is a gap between two adjacent sets of heat dissipation holes 14 that is not open.

[0036] A fan blade 13 is rotatably mounted inside the heat sink 12. The shaft of the motor body 1 is arranged through the side wall of the motor, and the shaft of the fan blade 13 is coaxial with the shaft of the motor body 1. The shaft of the fan blade 13 is sleeved on the shaft of the motor body 1, and a key block 3 is fixedly connected to the shaft of the fan blade 13. A key groove 31 is provided on the shaft of the motor body 1, and the key block 3 and the key groove 31 are engaged and matched.

[0037] A sealing plate is rotatably installed inside the heat sink 12. Multiple sets of first connecting holes 15 are opened on the sealing plate. The multiple sets of first connecting holes 15 are also evenly distributed along the circumference of the heat sink 12. At the same time, the multiple sets of first connecting holes 15 correspond one-to-one with multiple sets of heat dissipation holes 14. The heat dissipation holes 14 are arranged in a fan shape. The heat sink 12 is also equipped with an adjustment component 2 for rotating and adjusting the sealing plate.

[0038] Reference Figure 1 and Figure 2 The adjusting component 2 includes a rotating cylinder 21 fixedly connected to the shaft of the sealing plate 16. The end of the rotating cylinder 21 near the motor body 1 is open. The shaft of the fan blade 13 is movably inserted into the rotating cylinder 21. A torsion spring 22 is fixedly connected to the shaft of the rotating cylinder 21. A rotating groove 232 is provided on the rotating cylinder 21. An adjusting component 23 is also provided on the heat sink 12. The adjusting component 23 includes an adjusting block 231 slidably disposed on the heat sink 12. The adjusting block 231 passes through and is relatively slidably disposed in the rotating groove 232. The end of the adjusting block 231 is inclined. The width of the end of the adjusting block 231 away from the axis of the rotating cylinder 21 is smaller than the width of the end of the adjusting block 231 near the axis of the rotating cylinder 21. The inclined side of the adjusting block 231 is in contact with and abuts against the inner wall of the rotating groove 232.

[0039] Meanwhile, the heat sink 12 is also equipped with a sliding member 24 for sliding adjustment of the adjusting block 231, as shown in the reference. Figure 2 The sliding member 24 includes a sliding block 241 that is elastically slidably disposed on the rotating shaft of the fan blade 13. The sliding direction of the sliding block 241 is consistent with the radial direction of the rotating shaft of the fan blade 13. The end of the sliding block 241 away from the rotating shaft of the fan blade 13 is movably attached to the end of the adjusting block 231 near the axis of the rotating cylinder 21. The end side of the sliding block 241 is inclined, and the inclined side of the sliding block 241 is attached to the adjusting block 231.

[0040] Since the rotational speed of the fan blade 13 is related to the rotational speed of the motor body 1 shaft, the difference in the rotational speed of the fan blade 13 results in a difference in the magnitude of the centrifugal force generated during rotation, which in turn changes the length of the extended sliding block 241. Since one end of the extended sliding block 241 is in contact with the end side of the adjusting block 231, the adjusting block 231 is adjusted when the sliding block 241 is extended, thereby adjusting the rotation angle of the rotating cylinder 21 and the sealing plate 16, and realizing the adjustment of the air intake volume according to the difference in rotational speed.

[0041] Since the motor operates at a constant speed under normal conditions, the inverter 11 needs to maintain a stable output frequency in order to maintain a stable heat dissipation efficiency at the current operating frequency of the motor. A limit block 25 is slidably installed inside the heat sink 12. A snap-fit ​​groove 251 is opened on the side of the limit block 25 away from the inner wall of the heat sink 12. The snap-fit ​​groove 251 is serrated. A snap-fit ​​block 252 is provided on the side of the adjusting block 231 away from the motor body 1. The snap-fit ​​block 252 is movably snap-fitted and adapted to the snap-fit ​​groove 251. Since the integrated motor operates at a constant speed under normal working conditions, the speed of the motor needs to be adjusted by the frequency converter 11 each time the usage scenario is changed. Under the same usage conditions, the speed of the motor is basically the same, so the rotation speed of the fan blade 13 is also basically the same. At the current rotation speed, the position of the adjusting block 231 is fixed by the sliding limit block 25 and the opening snap-fit ​​groove 251, so as to maintain a stable air intake at the current motor rotation speed and reduce the vibration caused by the collision between the adjusting block 231 and the sliding block 241 during the operation of the motor body 1.

[0042] To facilitate the sliding adjustment of the limiting block 25, a retaining member 26 is also provided inside the heat sink 12. The retaining member 26 includes a retaining block 261 fixed to the inner wall of the heat sink 12. The retaining block 261 is an electromagnet. The limiting block 25 is elastically slidably disposed on the retaining block 261. When the retaining block 261 is energized, it and the limiting block 25 are repelled by the same polarity, thereby limiting the position of the limiting block 231 when the limiting block 25 slides to a position close to the adjusting block 231. A wire 262 connected to the retaining block 261 is embedded inside the heat sink 12. A first contact 263 connected to the wire 262 is provided at one end of the heat sink 12 near the motor body 1. A second contact 264 electrically connected to the motor body 1 is provided on the motor body 1. The first contact 263 and the second contact 264 are movably fitted together. The electromagnet is electrically connected to the motor body 1 through the wire 262, the first contact 263, and the second contact 264.

[0043] It should be noted that in this application, the fan blade 13 is directly connected to the shaft of the motor body 1. In other embodiments, the fan blade 13 may also be electrically connected to the inverter 11. That is, the fan blade 13 is not directly connected to the shaft of the motor body 1, but is electrically connected to the inverter 11 through the controller and the wire 262. The only structural changes here are the key block 3 and the keyway 31, and the rest of the structure remains unchanged.

[0044] The implementation principle of the integrated permanent magnet motor of the frequency converter 11 in this application embodiment is as follows: When the motor body 1 is working, the first contact 263 and the second contact 264 conduct electricity to energize the pressing block 261, so that the limiting block 25 slides to the position corresponding to the adjusting block 231. At this time, during the operation of the motor body 1, the sliding block 241 extends out of the rotating shaft of the fan blade 13 under the action of centrifugal force and presses against the adjusting block 231, so that the rotating cylinder 21 and the sealing plate 16 rotate, thereby realizing the adjustment of the air intake volume under the current speed of the motor body 1.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A permanent magnet motor with integrated frequency converter, comprising a motor body (1) and a frequency converter (11) disposed on the motor body (1), characterized in that: The motor body (1) is provided with a heat sink (12) on one end. The heat sink (12) covers the end of the motor body (1) away from the output shaft. A fan blade (13) is rotatably arranged inside the heat sink (12). The fan blade (13) is connected to the rotating shaft of the motor body (1). A heat dissipation hole (14) is opened on the heat sink (12). A sealing plate (16) is rotatably arranged on the heat sink (12). A first connecting hole (15) is opened on the sealing plate (16). The first connecting hole (15) is movably connected to the heat dissipation hole (14). An adjustment component (2) for rotating the sealing plate (16) is also provided inside the heat sink (12).

2. The inverter-integrated permanent magnet motor according to claim 1, characterized in that: The adjustment assembly (2) includes a rotating cylinder (21) located at the rotation axis of the sealing plate (16), a torsion spring (22) located at the rotation axis, and an adjustment component (23) for adjusting the rotation angle of the sealing plate (16). The rotating cylinder (21) is coaxially arranged with the rotation axis of the motor body (1).

3. The variable frequency drive integrated permanent magnet motor according to claim 2, characterized in that: The adjusting component (23) includes an adjusting block (231) slidably disposed on the rotating cylinder (21). The rotating cylinder (21) has a rotating groove (232). The adjusting block (231) is aligned with the radial direction of the rotating cylinder (21). One side wall of the adjusting block (231) is inclined. The inclined side of the adjusting block (231) is in contact with the inner side wall of the rotating groove (232). The heat sink (12) also has a sliding component (24) for sliding adjustment of the adjusting block (231).

4. The variable frequency drive integrated permanent magnet motor according to claim 3, characterized in that: The rotating shaft of the fan blade (13) extends into the rotating cylinder (21). The sliding member (24) includes a sliding block (241) that is elastically slidably disposed on the rotating shaft. The end side of the sliding block (241) protrudes from the rotating shaft and is in contact with the end side of the adjusting block (231) located on the rotating cylinder (21).

5. The inverter-integrated permanent magnet motor according to claim 4, characterized in that: A limiting block (25) is slidably disposed inside the heat sink (12). A snap-fit ​​groove (251) is provided on the side of the limiting block (25) away from the inner wall of the heat sink (12). A snap-fit ​​block (252) is provided at the end of the adjusting block (231) away from the motor body (1). Multiple sets of snap-fit ​​blocks (252) are provided. Multiple sets of snap-fit ​​blocks (252) are movably snap-fitted and adapted to the snap-fit ​​groove (251). A clamping member (26) for sliding adjustment of the limiting block (25) is provided inside the heat sink (12).

6. The variable frequency drive integrated permanent magnet motor according to claim 5, characterized in that: The clamping member (26) includes a clamping block (261) disposed on the inner wall of the heat sink (12). The clamping block (261) is an electromagnet. A wire (262) connected to the clamping block (261) is embedded in the heat sink (12). A first contact (263) connected to the wire (262) is provided at one end of the heat sink (12) near the motor body (1). A second contact (264) electrically connected to the motor body (1) is provided on the motor body (1). The first contact (263) and the second contact (264) are movably attached. The electromagnet is electrically connected to the motor body (1) through the wire (262), the first contact (263), and the second contact (264). The clamping block (261) is magnetically connected to the limiting block (25).

7. A frequency converter integrated permanent magnet motor according to claim 6, characterized in that: The rotating shaft of the fan blade (13) is movably sleeved on the rotating shaft of the motor body (1). The rotating shaft of the fan blade (13) is provided with a key block (3), and the rotating shaft of the motor body (1) is provided with a keyway (31). The key block (3) and the keyway (31) are engaged and adapted to each other.

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