Three-phase permanent magnet motor system, motor controller and harmonic current suppression assembly thereof

Abstract

This utility model relates to the field of motor controller components, specifically to a three-phase permanent magnet motor system and its motor controller, as well as a harmonic current suppression component. The harmonic current suppression component includes an insulating base with wiring harness through-holes for the three-phase wiring harness to pass through and be fixed therein. A harmonic current suppression ring is also installed on the surface of the wiring harness through-holes on the insulating base. A heat dissipation base is also provided on the side of the harmonic current suppression ring facing away from the insulating base. The heat dissipation base has corresponding wiring harness through-holes and a cooling structure for cooling the harmonic current suppression ring. A heat transfer connection exists between the harmonic current suppression ring and the cooling structure. In use, the cooling structure on the heat dissipation base cools the harmonic current suppression ring, preventing overheating and ensuring the normal operation of the three-phase permanent magnet motor controller.

Description

Technical Field

[0001] This utility model relates to the field of motor controller components, specifically to a three-phase permanent magnet motor system and its motor controller and harmonic current suppression components. Background Technology

[0002] With increasingly stringent environmental protection requirements and the rapid development of new energy sources, electric vehicles have emerged. The motor system, as the heart of a new energy vehicle, plays a crucial role in its operation. The motor system includes the motor and the motor controller. The motor controller contains power transistors, which have fast switching characteristics, resulting in a high rate of current change. This high rate of current change generates harmonic currents in the three-phase wiring harness at its three-phase output terminals. Within the motor, the motor shaft, its mounted bearings, and the motor housing form a closed loop. When harmonic currents are generated in the three-phase wiring harness, they induce impact currents between the two bearings of the motor. This causes electrolytic corrosion of the motor shaft and bearings, leading to serious quality problems and significant economic losses.

[0003] To address the aforementioned issues, existing motor controllers typically incorporate harmonic current suppression components at their three-phase output terminals. These components include an insulating housing with a magnetic ring mounted on it. This magnetic ring is fitted around the outside of the three-phase wiring harness to suppress harmonic currents generated on the harness. The magnetic ring effectively suppresses harmonic currents caused by the rapid switching of power transistors within the motor controller, inhibiting induced currents on the motor shaft and bearings and preventing electrolytic corrosion. However, the magnetic ring's temperature rises during operation, and this heat is transferred through the insulating housing to the motor controller housing, and then to other components within the controller, affecting the normal operation of the motor controller. Utility Model Content

[0004] The purpose of this invention is to provide a harmonic current suppression component to solve the problem that the harmonic current suppression loop of existing harmonic current suppression components heats up during operation, affecting the normal operation of the motor controller; the purpose of this invention is also to provide a three-phase permanent magnet motor controller to solve the problem that the harmonic current suppression loop of existing motor controllers heats up during operation, affecting the normal operation of the motor controller; the purpose of this invention is also to provide a three-phase permanent magnet motor system to solve the problem that the harmonic current suppression loop of existing motor controllers heats up during operation, affecting the normal operation of the motor controller.

[0005] The harmonic current suppression component of this utility model is installed inside the motor controller housing at the output end of the three-phase current. It includes an insulating base, on which a wire harness through hole is provided for the three-phase wire harness to pass through and be fixed therein. On the surface of the wire harness through hole of the insulating base, a harmonic current suppression ring is also installed for fitting on the outside of the three-phase wire harness to suppress the generation of harmonic current on the three-phase wire harness. On the side of the harmonic current suppression ring facing away from the insulating base, a heat dissipation base is also provided. The heat dissipation base is provided with a corresponding wire harness through hole for the wire harness to pass through and then into the wire harness through hole on the insulating base. The heat dissipation base is provided with a cooling structure for cooling the harmonic current suppression ring. There is a heat transfer connection between the harmonic current suppression ring on the insulating base and the cooling structure of the heat dissipation base.

[0006] Furthermore, the cooling structure is a suppression ring cooling water channel provided in the heat dissipation base, in the side wall near the harmonic current suppression ring. The suppression ring cooling water channel has an inlet and an outlet connected to the main cooling water channel of the entire motor controller.

[0007] Furthermore, the harmonic current suppression ring is elliptical or racetrack-shaped, and its internal space can allow three-phase wire harnesses to pass through simultaneously, so that the harmonic current on the three-phase wire harnesses can be suppressed at the same time using the same harmonic current suppression ring. The outline of the cooling water channel of the suppression ring is consistent with the outline of the harmonic current suppression ring and the two coincide in the axial direction. The wire harness through hole on the heat sink is located inside the cooling water channel of the suppression ring and coincides in the axial direction with the wire harness through hole on the insulating base.

[0008] Furthermore, the inlet and outlet of the suppression ring cooling channel, which are used to connect with the main cooling channel, are located at both ends of the suppression ring cooling channel, so that the coolant enters through the inlet of the suppression ring cooling channel and flows in parallel and out through the outlet.

[0009] Furthermore, the harmonic current suppression ring and the cooling water channel of the suppression ring are connected by a heat-conducting pad for heat transfer. The heat-conducting pad is sandwiched between the insulating base and the heat dissipation base, and its two sides are respectively attached to the side walls of the harmonic current suppression ring and the heat dissipation base to ensure the heat transfer effect. The heat-conducting pad is ring-shaped, and its outer contour is not smaller than the outer contour of the harmonic current suppression ring, and its inner contour is not larger than the inner contour of the harmonic current suppression ring.

[0010] Furthermore, the insulating base is provided with heat dissipation fins for dissipating heat from the harmonic current suppression ring.

[0011] Furthermore, the insulating base is provided with a slot for mounting a harmonic current suppression ring, and the harmonic current suppression ring is interference-fitted into the slot.

[0012] Furthermore, the side wall of the insulating base, which is parallel to the arrangement direction of the three wire harness through holes, is provided with an operating port through which bolts can be inserted laterally to fix the three-phase wire harness.

[0013] This utility model proposes a novel technical solution: A wire harness through-hole is provided on the insulating base for the three-phase wire harness to pass through and be fixed therein. A harmonic current suppression ring is installed on the surface of the wire harness through-hole on the insulating base. A heat dissipation base is also provided on the side of the harmonic current suppression ring facing away from the insulating base. The heat dissipation base has corresponding wire harness through-holes for the wire harness to pass through and then into the wire harness through-hole on the insulating base. The heat dissipation base is provided with a cooling structure for cooling the harmonic current suppression ring. A heat transfer connection is established between the harmonic current suppression ring on the insulating base and the cooling structure of the heat dissipation base. During use, the cooling structure on the heat dissipation base cools the harmonic current suppression ring, preventing overheating and preventing the heat generated by the harmonic current suppression ring during operation from being transferred to other components through the motor controller housing, thus ensuring the normal operation of the three-phase permanent magnet motor controller.

[0014] Another aspect of this utility model provides a three-phase permanent magnet motor controller. The three-phase permanent magnet motor controller includes a controller housing. Inside the controller housing, at the output end of the three-phase current, a harmonic current suppression component is provided. The harmonic current suppression component includes an insulating base. The insulating base is provided with a wire harness through hole for the three-phase wire harness to pass through and be fixed therein. A harmonic current suppression ring for fitting on the outside of the three-phase wire harness to suppress the generation of harmonic current on the three-phase wire harness is also installed on the surface of the wire harness through hole of the insulating base. A heat dissipation base is provided on the side of the harmonic current suppression ring facing away from the insulating base. The heat dissipation base is provided with a corresponding wire harness through hole for the wire harness to pass through and then into the wire harness through hole on the insulating base. The heat dissipation base is provided with a cooling structure for cooling the harmonic current suppression ring. There is a heat transfer connection between the harmonic current suppression ring on the insulating base and the cooling structure of the heat dissipation base.

[0015] Furthermore, the cooling structure is a suppression ring cooling water channel provided in the heat dissipation base, in the side wall near the harmonic current suppression ring. The suppression ring cooling water channel has an inlet and an outlet connected to the main cooling water channel of the entire motor controller.

[0016] Furthermore, the harmonic current suppression ring is elliptical or racetrack-shaped, and its internal space can allow three-phase wire harnesses to pass through simultaneously, so that the harmonic current on the three-phase wire harnesses can be suppressed at the same time using the same harmonic current suppression ring. The outline of the cooling water channel of the suppression ring is consistent with the outline of the harmonic current suppression ring and the two coincide in the axial direction. The wire harness through hole on the heat sink is located inside the cooling water channel of the suppression ring and coincides in the axial direction with the wire harness through hole on the insulating base.

[0017] Furthermore, the inlet and outlet of the suppression ring cooling channel, which are used to connect with the main cooling channel, are located at both ends of the suppression ring cooling channel, so that the coolant enters through the inlet of the suppression ring cooling channel and flows in parallel and out through the outlet.

[0018] Furthermore, the harmonic current suppression ring and the cooling water channel of the suppression ring are connected by a heat-conducting pad for heat transfer. The heat-conducting pad is sandwiched between the insulating base and the heat dissipation base, and its two sides are respectively attached to the side walls of the harmonic current suppression ring and the heat dissipation base to ensure the heat transfer effect. The heat-conducting pad is ring-shaped, and its outer contour is not smaller than the outer contour of the harmonic current suppression ring, and its inner contour is not larger than the inner contour of the harmonic current suppression ring.

[0019] Furthermore, the insulating base is provided with heat dissipation fins for dissipating heat from the harmonic current suppression ring.

[0020] Furthermore, the insulating base is provided with a slot for mounting a harmonic current suppression ring, and the harmonic current suppression ring is interference-fitted into the slot.

[0021] Furthermore, the side wall of the insulating base, which is parallel to the arrangement direction of the three wire harness through holes, is provided with an operating port through which bolts can be inserted laterally to fix the three-phase wire harness.

[0022] This utility model proposes a novel technical solution: A wire harness through-hole is provided on the insulating base for the three-phase wire harness to pass through and be fixed therein. A harmonic current suppression ring is installed on the surface of the wire harness through-hole on the insulating base. A heat dissipation base is also provided on the side of the harmonic current suppression ring facing away from the insulating base. The heat dissipation base has corresponding wire harness through-holes for the wire harness to pass through and then into the wire harness through-hole on the insulating base. The heat dissipation base is provided with a cooling structure for cooling the harmonic current suppression ring. A heat transfer connection is established between the harmonic current suppression ring on the insulating base and the cooling structure of the heat dissipation base. During use, the cooling structure on the heat dissipation base cools the harmonic current suppression ring, preventing overheating and preventing the heat generated by the harmonic current suppression ring during operation from being transferred to other components through the motor controller housing, thus ensuring the normal operation of the three-phase permanent magnet motor controller.

[0023] Another aspect of this utility model provides a three-phase permanent magnet motor system, which includes a motor and a motor controller. The motor controller includes a controller housing, and a harmonic current suppression component is provided inside the controller housing at the output end of the three-phase current. The harmonic current suppression component includes an insulating base, and the insulating base is provided with a wire harness through hole for the three-phase wire harness to pass through and be fixed therein. A harmonic current suppression ring for being fitted on the outside of the three-phase wire harness to suppress the generation of harmonic current on the three-phase wire harness is also installed on the surface where the opening of the wire harness through hole of the insulating base is located. A heat dissipation base is also provided on the side of the harmonic current suppression ring facing away from the insulating base. The heat dissipation base is provided with a corresponding wire harness through hole for the wire harness to pass through and then into the wire harness through hole on the insulating base. The heat dissipation base is provided with a cooling structure for cooling the harmonic current suppression ring, and there is a heat transfer connection between the harmonic current suppression ring on the insulating base and the cooling structure of the heat dissipation base.

[0024] Furthermore, the cooling structure is a suppression ring cooling water channel provided in the heat dissipation base, in the side wall near the harmonic current suppression ring. The suppression ring cooling water channel has an inlet and an outlet connected to the main cooling water channel of the entire motor controller.

[0025] Furthermore, the harmonic current suppression ring is elliptical or racetrack-shaped, and its internal space can allow three-phase wire harnesses to pass through simultaneously, so that the harmonic current on the three-phase wire harnesses can be suppressed at the same time using the same harmonic current suppression ring. The outline of the cooling water channel of the suppression ring is consistent with the outline of the harmonic current suppression ring and the two coincide in the axial direction. The wire harness through hole on the heat sink is located inside the cooling water channel of the suppression ring and coincides in the axial direction with the wire harness through hole on the insulating base.

[0026] Furthermore, the inlet and outlet of the suppression ring cooling channel, which are used to connect with the main cooling channel, are located at both ends of the suppression ring cooling channel, so that the coolant enters through the inlet of the suppression ring cooling channel and flows in parallel and out through the outlet.

[0027] Furthermore, the harmonic current suppression ring and the cooling water channel of the suppression ring are connected by a heat-conducting pad for heat transfer. The heat-conducting pad is sandwiched between the insulating base and the heat dissipation base, and its two sides are respectively attached to the side walls of the harmonic current suppression ring and the heat dissipation base to ensure the heat transfer effect. The heat-conducting pad is ring-shaped, and its outer contour is not smaller than the outer contour of the harmonic current suppression ring, and its inner contour is not larger than the inner contour of the harmonic current suppression ring.

[0028] Furthermore, the insulating base is provided with heat dissipation fins for dissipating heat from the harmonic current suppression ring.

[0029] Furthermore, the insulating base is provided with a slot for mounting a harmonic current suppression ring, and the harmonic current suppression ring is interference-fitted into the slot.

[0030] Furthermore, the side wall of the insulating base, which is parallel to the arrangement direction of the three wire harness through holes, is provided with an operating port through which bolts can be inserted laterally to fix the three-phase wire harness.

[0031] This utility model proposes a novel technical solution: A wire harness through-hole is provided on the insulating base for the three-phase wire harness to pass through and be fixed therein. A harmonic current suppression ring is installed on the surface of the wire harness through-hole on the insulating base. A heat dissipation base is also provided on the side of the harmonic current suppression ring facing away from the insulating base. The heat dissipation base has corresponding wire harness through-holes for the wire harness to pass through and then into the wire harness through-hole on the insulating base. The heat dissipation base is provided with a cooling structure for cooling the harmonic current suppression ring. A heat transfer connection is established between the harmonic current suppression ring on the insulating base and the cooling structure of the heat dissipation base. During use, the cooling structure on the heat dissipation base cools the harmonic current suppression ring, preventing overheating and preventing the heat generated by the harmonic current suppression ring during operation from being transferred to other components through the motor controller housing, thus ensuring the normal operation of the three-phase permanent magnet motor controller. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the magnetic field suppression component of this utility model;

[0033] In the diagram: 1. Insulating base; 11. Slot; 12. Wire harness through hole; 13. Heat dissipation fins; 14. Bolt; 15. Operating port; 2. Harmonic current suppression ring; 3. Thermal pad; 4. Heat dissipation base; 41. Wire harness through hole. Detailed Implementation

[0034] This utility model proposes a novel technical solution to address the problems existing in the above-mentioned technical solutions: A wire harness through-hole is provided on the insulating base for the three-phase wire harness to pass through and be fixed therein. A harmonic current suppression ring is installed on the surface of the wire harness through-hole on the insulating base. A heat dissipation base is also provided on the side of the harmonic current suppression ring facing away from the insulating base. The heat dissipation base has corresponding wire harness through-holes for the wire harness to pass through and then into the wire harness through-hole on the insulating base. The heat dissipation base is provided with a cooling structure for cooling the harmonic current suppression ring. A heat transfer connection is established between the harmonic current suppression ring on the insulating base and the cooling structure of the heat dissipation base. In use, the cooling structure on the heat dissipation base cools the harmonic current suppression ring, preventing overheating and preventing the heat generated by the harmonic current suppression ring during operation from being transferred to other components through the motor controller housing, thus ensuring the normal operation of the three-phase permanent magnet motor controller.

[0035] This utility model discloses a three-phase permanent magnet motor system including a motor and a three-phase permanent magnet motor controller. The three-phase permanent magnet motor controller includes a controller housing, and a power transistor is disposed inside the controller housing. In this embodiment, a SiC MOSFET with higher switching speed is used. Of course, in other embodiments, Si MOSFET or Si IGBT can also be used. A harmonic current suppression component is provided inside the controller housing at the three-phase current output terminal. The harmonic current suppression component includes an insulating base 1. The controller housing is provided with a limiting groove that can limit the position of the insulating base 1. The insulating base 1 is provided with a wire harness through hole 12 for the three-phase wire harness to pass through and be fixed therein. A harmonic current suppression ring 2 (i.e., magnetic ring) is also installed on the surface of the wire harness through hole 12 of the insulating base 1 for fitting on the outside of the three-phase wire harness to suppress the generation of harmonic current on the three-phase wire harness. A heat dissipation base 4 is also provided on the side of the harmonic current suppression ring 2 facing away from the insulating base 1. The heat dissipation base 4 is provided with a corresponding wire harness through hole 41 for the wire harness to pass through it and then pass into the wire harness through hole 12 on the insulating base 1. The heat dissipation base 4 is provided with a cooling structure for cooling the harmonic current suppression ring 2. The harmonic current suppression ring 2 on the insulating base 1 and the cooling structure of the heat dissipation base 4 are heat-transfer connected. During use, the cooling structure on the heat sink 4 can cool the harmonic current suppression ring 2, preventing the harmonic current suppression ring 2 from overheating. It can also prevent the heat generated by the harmonic current suppression ring 2 during operation from being transferred to the components inside the motor controller through the motor controller housing, thus ensuring the normal operation of the three-phase permanent magnet motor controller.

[0036] The cooling structure is a suppression ring cooling water channel set inside the heat sink 4, on the side wall near the harmonic current suppression ring 2. The suppression ring cooling water channel has an inlet and an outlet connected to the main cooling water channel of the entire motor controller. The cooling water channel has a reliable cooling effect and utilizes the original main cooling water channel of the motor controller, saving costs. The harmonic current suppression ring 2 is elliptical or racetrack-shaped, and its internal space can allow three-phase wire harnesses to pass through simultaneously, so that the harmonic current of the three wire harnesses can be suppressed simultaneously using the same harmonic current suppression ring 2. The outline of the suppression ring cooling water channel is consistent with the outline of the harmonic current suppression ring 2 and the two coincide in the axial direction. The wire harness through hole 41 on the heat sink 4 is located inside the suppression ring cooling water channel and coincides in the axial direction with the wire harness through hole 12 on the insulating base 1. In this way, the suppression ring cooling water channel on the heat sink 4 can also dissipate heat from the wire harnesses passing through the wire harness through hole 41. The cooling channels of the harmonic current suppression ring 2 are also elliptical or racetrack-shaped. When the harmonic current suppression ring 2 is working and generating heat, the cooling channels of the suppression ring, which are structurally consistent and axially aligned with it, ensure reliable cooling while minimizing the length of the cooling channels and saving manufacturing costs. The inlet and outlet of the suppression ring cooling channels, which connect to the main cooling channels, are located at both ends of the suppression ring cooling channels, so that the coolant enters through the inlet of the suppression ring cooling channels and flows in parallel and exits through the outlet. The parallel flow of coolant can cool the corresponding sides of the harmonic current suppression ring 2 to an equal degree, ensuring the cooling effect.

[0037] like Figure 1 As shown, the harmonic current suppression ring 2 and the cooling water channel of the suppression ring are connected by a thermally conductive pad 3. The thermally conductive pad is sandwiched between the insulating base 1 and the heat dissipation base 4, and its two sides are respectively attached to the side walls of the harmonic current suppression ring 2 and the heat dissipation base 4 to ensure heat transfer effect. In this way, the heat on the harmonic current suppression ring 2 can be efficiently transferred to the cooling water channel of the suppression ring for efficient heat dissipation of the harmonic current suppression ring 2. The thermally conductive pad 3 is annular, and its outer contour is not smaller than the outer contour of the harmonic current suppression ring 2, and its inner contour is not larger than the inner contour of the harmonic current suppression ring 2. In this embodiment, the outer contour of the thermally conductive pad 3 is larger than the outer contour of the harmonic current suppression ring 2, and the inner contour is smaller than the inner contour of the harmonic current suppression ring 2. In this way, the thermally conductive pad 3 can increase the heat transfer contact area between the harmonic current suppression ring 2 and the heat dissipation base 4 to improve the heat dissipation effect. Of course, in other embodiments, the contour of the thermally conductive pad 3 can also be consistent with the contour of the harmonic current suppression ring 2.

[0038] The insulating base 1 has heat dissipation fins 13 on its sidewall for dissipating heat from the harmonic current suppression ring 2. The insulating base is made of thermally conductive material. Grooves are provided on the edge of the insulating base 1 at the surface where the harmonic current suppression ring 2 is located. Eleven spaced ribs are arranged within the grooves to form the heat dissipation fins 13. The distance between two ribs at the ends is greater than the length of the harmonic current suppression ring 2, thus further improving the heat dissipation effect on the harmonic current suppression ring 2. Of course, the number of grooves and heat dissipation fins can be set according to actual needs. An operating port 15 is provided on the sidewall of the insulating base 1, parallel to the arrangement direction of the three wire harness through holes 12, allowing bolts 14 to be inserted laterally to fix the three-phase wire harness. The ends of the three-phase wire harnesses are provided with wire lugs. The wire lugs are inserted into the wire harness through holes 12 on the insulating base 1, and then bolts 14 are inserted through the clearance opening and pass through the wire lugs to fix the wire harnesses.

[0039] The insulating base 1 is provided with a slot 11 for mounting the harmonic current suppression ring 2, and the harmonic current suppression ring 2 is interference-fitted into the slot 11. This ensures the secure mounting of the harmonic current suppression ring 2, prevents its displacement, and guarantees its suppression effect. Simultaneously, after the harmonic current suppression ring 2 is mounted in the slot 11, the contact area between the harmonic current suppression ring 2 and the insulating base 1 increases, allowing for efficient heat transfer to the insulating base 1. At this time, the heat dissipation fins 13 on the insulating base 1 can efficiently dissipate heat from the harmonic current suppression ring 2, improving the heat dissipation effect.

[0040] Regarding the cooling structure, this utility model also provides other embodiments. In another embodiment, the cooling structure can also be a finned heat sink mounted on a heat sink base. The heat sink is heat-transfer connected to the harmonic current suppression ring to achieve heat dissipation for the harmonic current suppression ring.

[0041] Regarding the structure of the harmonic current suppression ring, this utility model also provides other embodiments. In another embodiment, the harmonic current suppression ring is circular and is arranged radially outward corresponding to each phase wire harness. In this case, the cooling water channel of the suppression ring on the heat sink can be arranged in an S-shape, as long as it can effectively dissipate heat from the harmonic current suppression ring.

[0042] Regarding the arrangement of the harmonic current suppression ring and the suppression ring cooling water channel, this utility model also provides other embodiments. In another embodiment, the harmonic current suppression ring and the suppression ring cooling water channel can be arranged at a certain distance in the axial direction, as long as it is ensured that the harmonic current suppression ring can be heat-transfer connected with the suppression ring cooling water channel.

[0043] Regarding the shape of the cooling water channel, this utility model also provides other embodiments. In another embodiment, the suppression ring cooling water channel can also be C-shaped. In this case, the inlet and outlet can be located at the two ends of the suppression ring cooling water channel, respectively.

[0044] Regarding the heat transfer connection between the harmonic current suppression ring and the suppression ring cooling water channel, this utility model also provides other embodiments. In another embodiment, the side of the harmonic current suppression ring facing the heat sink can be directly attached to the heat sink, as long as it can transfer its own heat to the suppression ring cooling water channel.

[0045] Regarding the installation of the harmonic current suppression ring, this utility model also provides other embodiments. In another embodiment, the harmonic current suppression ring can also be encapsulated in the insulating base, but it is necessary to ensure that the harmonic current suppression ring has a portion exposed on the lower surface of the insulating base for heat transfer connection with the suppression ring cooling water channel.

[0046] Another aspect of this utility model provides a three-phase permanent magnet motor controller. The controller housing of the three-phase permanent magnet motor controller is provided with slots for limiting the positions of the insulating base and the heat sink base. After the controller housing is installed, the insulating base and the heat sink base can be clamped within them to ensure that their positions do not shift. Since the implementation method of the three-phase permanent magnet motor controller is the same as the three-phase permanent magnet motor controller described above, it will not be repeated here.

[0047] Another aspect of this utility model provides a harmonic current suppression component. Since the implementation method of the harmonic current suppression component is the same as that of the above-mentioned harmonic current suppression component, it will not be described again here.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A harmonic current suppression component, characterized in that: Installed inside the motor controller housing at the output terminal of the three-phase current, it includes an insulating base. The insulating base has wire harness through holes for the three-phase wire harness to pass through and be fixed therein. On the surface of the wire harness through holes of the insulating base, there is also a harmonic current suppression ring for fitting on the outside of the three-phase wire harness to suppress the generation of harmonic current on the three-phase wire harness. On the side of the harmonic current suppression ring facing away from the insulating base, there is also a heat dissipation base. The heat dissipation base has corresponding wire harness through holes for the wire harness to pass through and then into the wire harness through holes on the insulating base. The heat dissipation base has a cooling structure for cooling the harmonic current suppression ring. There is a heat transfer connection between the harmonic current suppression ring on the insulating base and the cooling structure of the heat dissipation base.

2. The harmonic current suppression component according to claim 1, characterized in that: The cooling structure consists of a suppression ring cooling water channel located inside the heat sink body and on the side wall near the harmonic current suppression ring. The suppression ring cooling water channel has an inlet and an outlet that are connected to the main cooling water channel of the entire motor controller.

3. The harmonic current suppression component according to claim 2, characterized in that: The harmonic current suppression ring is elliptical or racetrack-shaped, and its internal space can allow three-phase wire harnesses to pass through simultaneously. This allows the same harmonic current suppression ring to suppress harmonic currents on the three-phase wire harnesses at the same time. The outline of the cooling water channel of the suppression ring is consistent with the outline of the harmonic current suppression ring and the two coincide in the axial direction. The wire harness through-hole on the heat sink is located inside the cooling water channel of the suppression ring and coincides in the axial direction with the wire harness through-hole on the insulating base.

4. The harmonic current suppression component according to claim 3, characterized in that: The inlet and outlet of the suppression ring cooling water channel, which are used to connect with the main cooling water channel, are located at both ends of the suppression ring cooling water channel, so that the coolant enters through the inlet of the suppression ring cooling water channel and flows in parallel and flows out through the outlet.

5. The harmonic current suppression component according to claim 3 or 4, characterized in that: The harmonic current suppression ring and the cooling water channel of the suppression ring are connected by a heat-conducting pad for heat transfer. The heat-conducting pad is sandwiched between the insulating base and the heat dissipation base, and its two sides are respectively attached to the side walls of the harmonic current suppression ring and the heat dissipation base to ensure the heat transfer effect. The heat-conducting pad is ring-shaped, and its outer contour is not smaller than the outer contour of the harmonic current suppression ring, and its inner contour is not larger than the inner contour of the harmonic current suppression ring.

6. The harmonic current suppression component according to any one of claims 1-4, characterized in that: The insulating base is provided with heat dissipation fins for dissipating heat from the harmonic current suppression ring.

7. The harmonic current suppression component according to any one of claims 1-4, characterized in that: The insulating base is provided with a slot for installing a harmonic current suppression ring, and the harmonic current suppression ring is interference-fitted into the slot.

8. The harmonic current suppression component according to any one of claims 1-4, characterized in that: The insulating base has an operating port on its side wall, which is parallel to the arrangement direction of the three wire harness through holes, so that bolts can be inserted laterally to fix the three-phase wire harness.

9. A three-phase permanent magnet motor controller, comprising a controller housing, wherein a harmonic current suppression component is provided inside the controller housing at the output terminal of the three-phase current, characterized in that... The harmonic current suppression component is the harmonic current suppression component applied to the output terminal of the motor controller as described in any one of claims 1-8.

10. A three-phase permanent magnet motor system, comprising a motor and a motor controller, the motor controller comprising a controller housing, wherein a harmonic current suppression component is provided inside the controller housing at the output terminal of the three-phase current, characterized in that... The harmonic current suppression component is the harmonic current suppression component applied to the output terminal of the motor controller as described in any one of claims 1-8.

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