Four-in-one permanent magnet synchronous motor
The four-in-one design integrating permanent magnet motor, motor controller, reducer and electromagnetic brake solves the problems of large installation space, high cost and lack of deceleration and braking of ordinary permanent magnet synchronous motors on engineering machinery equipment, realizes the compactness and safety of the motor, and prevents overheating through the water cooling system.
Patent Information
- Application Number
- CN202422236938.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-09-12
AI Technical Summary
Ordinary permanent magnet synchronous motors have problems such as large installation space, high cost and lack of deceleration and braking functions in engineering machinery equipment.
A four-in-one permanent magnet synchronous motor is designed, which integrates the permanent magnet motor, motor controller, reducer and electromagnetic brake in a single casing. The external current is converted into direct current through a rectifier and supplied to the motor controller. The speed and torque are adjusted using a planetary reduction mechanism, and the electromagnetic brake automatically locks the reduction mechanism when power is lost.
The motor has a compact structure, small size, and light weight, which not only ensures high safety but also reduces equipment installation space and production costs. It also has an integrated water cooling system to prevent overheating.
Smart Images
Figure CN223414719U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of motors, and in particular to a four-in-one permanent magnet synchronous motor. Background Art
[0002] With the widespread application of new energy permanent magnet synchronous motors in engineering machinery and equipment, the limitations of ordinary permanent magnet synchronous motors in cost, structure, and installation space have gradually become apparent.
[0003] (1) Ordinary permanent magnet synchronous motors and motor controllers are separate entities and need to be installed separately on the equipment, which increases the equipment installation space and indirectly increases the cost of the entire equipment;
[0004] (2) Ordinary permanent magnet synchronous motors do not have a reducer and have a high speed. A reducer with a large reduction ratio is required to achieve a low speed. The larger the reduction ratio of a similar reducer, the higher the price, which increases the cost of the entire machine.
[0005] (3) Ordinary permanent magnet synchronous motors do not have a power-off braking function, and a brake needs to be installed separately on the equipment, which increases the equipment installation space and also increases the production and manufacturing cost of the entire equipment. Utility Model Content
[0006] In order to solve the above technical problems, the present application provides a four-in-one permanent magnet synchronous motor, which has the advantages of ensuring the safety and functional diversity of the motor while integrating the permanent magnet motor, motor controller, reducer and electromagnetic brake into an all-in-one machine, with an integrated casing, compact structure, small size and light weight.
[0007] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:
[0008] A four-in-one permanent magnet synchronous motor, characterized in that it includes a housing, wherein a permanent magnet motor, a reducer linked to the permanent magnet motor, and a motor controller for controlling the working state of the permanent magnet motor are arranged in the housing, and a rectifier component for converting external current to drive the permanent magnet motor to rotate is arranged on the housing;
[0009] The reducer includes a planetary reduction mechanism connected to the output shaft of the permanent magnet motor and an electromagnetic brake for controlling the operation of the planetary reduction mechanism.
[0010] To implement the above technical solution, the external three-phase AC power is rectified into DC power through a rectifier as one of the options for the power input of the controller part, or the external DC power is directly input into the motor controller for use as power supply. The motor controller receives the power output by the rectifier part and drives the permanent magnet motor to control the corresponding output torque and speed; the output shaft of the permanent magnet motor is output through the planetary reduction mechanism to reduce the output speed and increase the output torque at the same time. When the motor loses power, the electromagnetic brake automatically locks the planetary reduction mechanism due to power failure, thereby ensuring the safety of the motor. In addition, because the permanent magnet synchronous motor, motor controller, reducer and electromagnetic brake are integrated into an all-in-one machine, the casing is integrated, the structure is compact, the volume is small and the weight is light.
[0011] As a preferred solution of the present application, the shell includes a middle shell, a front cover shell and a rear cover shell are respectively provided at both ends of the middle shell, the permanent magnet motor is arranged in the middle shell, the motor controller is arranged in the rear cover shell, the reducer is arranged in the front cover shell, and O-ring end face seals are provided between the front cover shell, the rear cover shell and the middle shell.
[0012] To implement the above technical solution, O-ring end face seals are provided between the front cover, the rear cover and the middle shell, so that the motor can reach the IP68 waterproof level.
[0013] As a preferred solution of the present application, the outer periphery of the middle shell is uniformly provided with axially penetrating water channels, and ribs for partitioning are provided between the water channels. The rear end cover shell (13) and the middle shell water channel matching portion are provided with grooves that can communicate with adjacent middle shell through-water channels, and the front end cover shell (12) and the middle shell water channel matching portion are provided with grooves that communicate with adjacent middle shell through-water channels. The groove of the front end cover shell and the groove of the rear end cover shell differ by an angle of the middle shell through-water channel. When the front end cover shell, the middle shell and the rear end cover shell are connected into one by bolts, a closed serpentine water channel is formed.
[0014] To implement the above technical solution, when the front cover, middle cover and rear cover are connected into one by bolts, a closed serpentine water channel is formed, so that the motor can be water-cooled as a whole, reducing the internal temperature of the shell caused by resistance heating and mechanical friction heating after long-term use of various components of the motor, thereby affecting the functionality and service life of electronic components.
[0015] As a preferred solution of the present application, the planetary reduction mechanism includes a sun gear connected to the output shaft of the permanent magnet motor, a planet carrier is provided on the outer sleeve of the sun gear, a number of planetary gears that are meshed with the sun gear for transmission are provided on the planet carrier, a ring gear is provided on the housing, the planetary gears are meshed with the ring gear for transmission, and an output wheel shaft extending out of the housing is provided on the planet carrier.
[0016] To implement the above technical solution, when the sun gear rotates, it will drive the planetary gears to rotate around their own rotation axes. When the planetary gears rotate, they will engage with the ring gear, causing the planetary gears to rotate around the ring gear. As a result, the planetary gears will rotate around the sun gear while rotating, thereby driving the planetary carrier to rotate, thereby causing the output wheel shaft on the planetary carrier to rotate, that is, the motor rotor passes through the setting of the planetary gears, sun gear and ring gear, thereby adjusting the output speed and torque.
[0017] As a preferred solution of the present application, the electromagnetic brake includes a brake gear ring arranged at the end of the planetary carrier and a yoke assembly arranged on the housing, a friction plate baffle is screwed to one end of the yoke assembly close to the permanent magnet motor, an armature is slidingly arranged inside the yoke assembly, a plurality of inner friction plates and outer friction plates are arranged between the armature and the friction plate, and the plurality of inner friction plates and outer friction plates are axially installed at intervals, a groove for sliding the outer friction plate is provided on the yoke assembly, a latching tooth for cooperating with the brake gear ring is provided on the inner friction plate, a coil for energizing and adsorbing the armature is provided in the yoke assembly, and a compression spring for pressing the armature toward the planetary carrier is provided between the yoke assembly and the armature.
[0018] To implement the above technical solution, when the electromagnetic brake is de-energized, there is no current in the coil, no magnetic lines of force in the yoke, and no electromagnetic force is generated. Therefore, the electromagnetic brake armature, under the thrust of the compression spring, compresses the inner and outer friction plates, preventing relative rotation between the plates by friction. The planetary carrier is thus fixed relative to the front housing via the brake gear ring mounted on the planetary carrier, the compressed inner and outer friction plate groups, and the yoke assembly, eliminating rotational freedom. When the electromagnetic brake is energized, the current in the coil generates an electromagnetic force in the yoke. This electromagnetic force overcomes the thrust of the compression spring and moves the armature to the right, releasing the compressed friction plate group and creating a gap between the inner and outer friction plates, allowing them to rotate freely relative to each other. This allows the planetary carrier to rotate freely relative to the front housing.
[0019] As a preferred solution of the present application, a detachable front end cover is provided at the end of the front end housing, and the front end cover and the front end housing are radially sealed by an O-ring.
[0020] Implementing the above technical solution facilitates the installation of various components in the above reducer.
[0021] As a preferred solution of the present application, the rectifier component includes rectification and filtering electrical elements for rectifying the external input three-phase AC power into DC power as part of the power input of the controller, and a relay for selecting between external three-phase AC power input and external DC power input.
[0022] To implement the above technical solution, the rectifier and filter electrical components rectify the external input three-phase AC power into DC power as part of the power input of the controller; through internal relay switching, the external three-phase AC power input and the external DC power input can be selected.
[0023] As a preferred solution of the present application, the motor controller includes a main control board, an IGBT drive module and an IGBT module electrically connected to the main control board.
[0024] As a preferred solution of the present application, a copper plate is provided on the IGBT module, an IGBT water cooling module is provided on the copper plate, a serpentine cooling water channel is provided in the IGBT water cooling module, and IGBT cooling water joints connected to the serpentine cooling water channel are provided at both ends of the serpentine cooling water channel.
[0025] To implement the above technical solution, a sealed cooling water channel is formed between the IGBT water plate and the cooling copper plate. The heat-conducting copper plate is attached to the IGBT module, and IGBT cooling water connectors connected to the cooling water channel are provided at both ends.
[0026] As a preferred solution of the present application, the IGBT cooling water joint is connected to the serpentine water channel in the housing.
[0027] By implementing the above technical solution, the IGBT can be cooled by water, thereby ensuring the service life of the cooled IGBT, and the cooling water path of the entire motor is as shown in the figure, forming an integrated water-cooled cooling system, ensuring the cleanliness of the external pipeline, thereby facilitating external wiring and other assembly.
[0028] In summary, this application includes at least one of the following beneficial technical effects:
[0029] 1. That is, the external three-phase AC power is rectified into DC power through a rectifier as one of the options for the controller part's power input, or the external DC power is directly input into the motor controller for power supply. The motor controller receives the power output by the rectifier part and drives the permanent magnet motor to control the corresponding output torque and speed; the output shaft of the permanent magnet motor is output through the planetary reduction mechanism to reduce the output speed and increase the output torque at the same time. When the motor loses power, the electromagnetic brake automatically locks the planetary reduction mechanism due to power failure, thereby ensuring the safety of the motor. In addition, because the permanent magnet synchronous motor, motor controller, reducer and electromagnetic brake are integrated into an all-in-one machine, the casing is integrated, the structure is compact, the size is small and the weight is light. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.
[0032] Figure 2 It is a side view of an embodiment of the present application.
[0033] Figure 3 It is a cross-sectional view of an embodiment of the present application.
[0034] Figure 4 It is a schematic diagram of the internal structure of an embodiment of the present application.
[0035] Figure 5 It is an exploded view of the reducer in the embodiment of the present application.
[0036] Figure 6 This is a flow diagram of the cooling water channel inside the shell in the embodiment of the present application.
[0037] Figure 7 It is a structural diagram of the IGBT waterway board in an embodiment of the present application.
[0038] Figure numerals: 1. Shell; 11. Middle shell; 12. Front cover; 13. Rear cover; 14. Water channel; 15. Rib plate; 2. Permanent magnet motor; 21. Stator; 22. Rotor; 3. Reducer; 31. Planetary reduction mechanism; 311. Sun gear; 312. Planet carrier; 313. Planetary gear; 314. Ring gear; 315. Output wheel shaft; 32. Electromagnetic brake; 321. Brake gear ring; 322. Yoke assembly; 323. Friction plate baffle; 324. Armature; 325. Inner friction plate; 326. Outer friction plate; 327. Slide; 328. Coil; 4. Motor controller; 41. Main control board; 42. IGBT module; 43. IGBT water channel board; 44. Serpentine cooling water trough; 45. Thermal conductive copper plate; 5. Rectifier assembly. DETAILED DESCRIPTION
[0039] The following is combined with Figure 1-7 This application is described in further detail.
[0040] The embodiment of the present application discloses a four-in-one permanent magnet synchronous motor. Figure 1 and Figure 3The four-in-one permanent magnet synchronous motor includes a housing 1, which houses a permanent magnet motor 2, a reducer 3 linked to the permanent magnet motor 2, and a motor controller 4 for controlling the operating state of the permanent magnet motor 2. The housing 1 is also equipped with a rectifier assembly 5 for converting external current to drive the permanent magnet motor 2. Specifically, the rectifier converts external three-phase AC power into DC power as power input for the controller, or directly inputs external DC power into the motor controller 4 for power supply. The motor controller 4 receives the power output from the rectifier and drives the permanent magnet motor 2 to output torque and speed according to control requirements.
[0041] Reference Figure 3 and Figure 6 Housing 1 comprises a center housing 11, with a front cover 12 and a rear cover 13 at either end. Both front and rear covers 12 and 13 are screwed to center housing 11, and O-ring end seals are provided between front and rear covers 12 and 13 and center housing 11 to ensure a tight seal. Permanent magnet motor 2 is disposed within center housing 11, motor controller 4 is disposed within rear cover 13, and reducer 3 is disposed within front cover 12. In order to reduce the internal temperature of the shell 1 caused by resistance heating and mechanical friction heating after long-term use of various components of the motor, which affects the functionality and service life of the electronic components, the side walls of the middle shell 11 are evenly provided with axially penetrating water channels 14, and ribs 15 for partition are provided between the water channels 14. The matching part of the rear end cover 13 and the water channel 14 of the middle shell 11 is provided with a groove that can communicate with the through-water channels 14 of adjacent middle shells 11. The matching part of the front end cover 12 and the water channel 14 of the middle shell 11 is provided with a groove that communicates with the through-water channels 14 of adjacent middle shells 11. The groove of the front end cover and the groove of the rear end cover differ by an angle of the through-water channel 14 of the middle shell 11. After the front end cover, the middle shell 11 and the rear end cover are connected into one by bolts, a closed serpentine water channel is formed, so that the motor can be water-cooled as a whole to ensure. In order to prevent water leakage between the front end cover 12 and the middle shell 11, and between the rear end cover 13 and the middle shell 11, radial O-ring sealing and end face O-ring sealing are respectively adopted between the front end cover 12 and the middle shell 11, and between the rear end cover 13 and the middle shell 11.
[0042] Reference Figure 1 and Figure 2 The rectifier assembly 5 includes rectifier and filter components for rectifying the external three-phase AC power input into DC power as part of the controller's power input, as well as a relay for selecting between the external three-phase AC power input and the external DC power input. The rectifier and filter components rectify the external three-phase AC power input into DC power as part of the controller's power input; the internal relay switches between the external three-phase AC power input and the external DC power input.
[0043] Reference Figure 1 and Figure 3 The motor controller 4 includes a main control board 41, an IGBT driver module electrically connected to the main control board 41, and an IGBT module 42. The IGBT module 42 is connected to the permanent magnet motor 2. The main control board 41 controls the IGBT driver module, which controls the IGBT module 42 to output a controllable AC voltage, current, and frequency after receiving the DC power input from the rectifier assembly 5, thereby controlling the motor's output torque and speed as required.
[0044] Reference Figure 1 and Figure 3 Because the IGBT module 42 is used for power conversion and output, its temperature can easily become excessively high. Therefore, an IGBT water cooling module is installed on the IGBT module 42. The IGBT water cooling module includes an IGBT water channel plate 43 and a heat-conducting copper plate 45. A serpentine cooling water trough 44 is provided in the IGBT water channel plate 43. The end-face sealing effect of an O-ring forms a sealed cooling water channel 14 between the IGBT water channel plate 43 and the cooling copper plate. The heat-conducting copper plate 45 is attached to the IGBT module 42. IGBT cooling water connectors are provided at both ends of the cooling water channel 14, connecting to the IGBT itself. The IGBT cooling water connectors are connected to the serpentine water channel in the housing 1, allowing the IGBT to be water-cooled, thereby ensuring the service life of the cooled IGBT. As shown in the figure, the cooling water channel of the entire motor forms an integrated water-cooled cooling system, ensuring the cleanliness of the external piping and facilitating external wiring and other assembly.
[0045] Reference Figure 1 and Figure 3 The permanent magnet motor 2 includes a stator 21 fixed to the inner wall of the middle housing 11. A rotor 22 is mounted within the stator 21. The rotor 22 is supported by the front and rear housing bearings, respectively. The front and rear housings engage the middle housing 11 through stoppers, ensuring the centering of the rotor 22. When energized, the rotor 22 rotates, converting electrical energy into mechanical kinetic energy.
[0046] Reference Figure 3 and Figure 4 The reducer 3 includes a planetary reduction mechanism 31 connected to the output shaft of the permanent magnet motor 2 and an electromagnetic brake 32 for controlling the operation of the planetary reduction mechanism 31 .
[0047] Reference Figure 3 and Figure 5The planetary reduction mechanism 31 includes a sun gear 311 connected to the output shaft of the permanent magnet motor 2. That is, the sun gear 311 is arranged on the rotating shaft of the rotor 22 so that the sun gear 311 can rotate with the rotor 22. A planet carrier 312 is provided on the outer surface of the sun gear 311. The planet carrier 312 is provided with a plurality of planetary gears 313 that mesh with the sun gear 311 for transmission. The housing 1 is provided with a ring gear 314, and the planetary gears 313 mesh with the ring gear 314 for transmission. The planet carrier 312 is provided with an output gear shaft 315 that extends out of the housing 1. That is, when the sun gear 311 rotates, it drives the planetary gears 313 to rotate about their own axes. When the planetary gears 313 rotate, they engage with the ring gear 314, causing the planetary gears 313 to rotate around the ring gear 314. In turn, the planetary gears 313 rotate while revolving around the sun gear 311, which in turn drives the planetary carrier 312 to rotate, thereby rotating the output shaft 315 on the planetary carrier 312. That is, the motor rotor 22 passes through the planetary gears 313, sun gear 311, and ring gear 314, thereby adjusting the output speed and torque. A rotary oil seal is provided between the output shaft 315 and the front cover to ensure a good sealing effect.
[0048] Reference Figure 3 and Figure 6 The electromagnetic brake 32 includes a brake gear ring 321 arranged at the end of the planetary carrier 312 and a yoke assembly 322 arranged on the housing 1. A friction plate baffle 323 is screwed to one end of the yoke assembly 322 close to the permanent magnet motor 2. An armature 324 is slidably arranged inside the yoke assembly 322. A plurality of inner friction plates 325 and outer friction plates 326 are arranged between the armature 324 and the friction plate. The plurality of inner friction plates 325 and the outer friction plates 326 are axially installed at intervals. A sliding groove 327 for the outer friction plate 326 to slide is provided on the yoke assembly 322, so that the outer friction plate 326 is restricted by the sliding groove 327 and can only move axially but cannot rotate. The inner friction plate 325 is provided with a latching tooth that cooperates with the brake gear ring 321. The yoke assembly 322 is provided with a coil 328 for energizing and attracting the armature 324. A compression spring is provided between the yoke assembly 322 and the armature 324 for pressing the armature 324 toward the planetary carrier 312.
[0049] When electromagnetic brake 32 is de-energized, there is no current in coil 328, no magnetic lines of force in the yoke, and no electromagnetic force is generated. Therefore, the armature 324 of electromagnetic brake 32, under the thrust of the compression spring, compresses the inner and outer friction plates 326. Friction prevents relative rotation between the inner and outer friction plates 326. Thus, planet carrier 312 is fixedly connected to the front end housing via the brake gear ring 321 mounted on planet carrier 312, the compressed inner and outer friction plates 326, and the yoke assembly, eliminating rotational freedom.
[0050] When the electromagnetic brake 32 is energized, the current in the coil 328 generates an electromagnetic force in the yoke. Under this electromagnetic force, the armature 324 overcomes the thrust of the compression spring and moves rightward. This releases the compressed friction plate assembly, creating a gap between the inner and outer friction plates 326. This allows the inner and outer friction plates 326 to rotate freely relative to each other. This allows the planet carrier 312 to rotate freely relative to the front cover.
[0051] To facilitate installation of the various components of the reducer 3, a removable front cover is installed at the end of the front housing. An O-ring is used to radially seal the front cover and the front housing. The cable outlet of the electromagnetic brake 32 is sealed with a cable gland to ensure that the entire motor achieves IP68 sealing.
[0052] The implementation principle of a four-in-one permanent magnet synchronous motor according to the present invention is as follows: a rectifier is used to convert external three-phase AC power into DC power, which is then used as power input for the controller. Alternatively, external DC power can be directly input and sent to the motor controller 4 for power supply. The motor controller 4 receives the power output from the rectifier and drives the permanent magnet motor 2 to output torque and speed according to control requirements. The sun gear 311 rotates along with the rotor 22. When the sun gear 311 rotates, it drives the planetary gears 313 to rotate around their own axis. When the planetary gears 313 rotate, they engage with the ring gear 314, causing the planetary gears 313 to rotate around the ring gear 314. This causes the planetary gears 313 to rotate while simultaneously revolving around the sun gear 311, which in turn drives the planetary carrier 312 to rotate, thereby rotating the output shaft 315 on the planetary carrier 312. This causes the motor rotor 22 to pass through the planetary gears 313, sun gear 311, and ring gear 314, thereby adjusting the output speed and torque. When electromagnetic brake 32 is de-energized, there is no current in coil 328, no magnetic lines of force in the yoke, and no electromagnetic force is generated. Therefore, the armature 324 of electromagnetic brake 32, under the thrust of the compression spring, compresses the inner and outer friction plates 326. Friction prevents relative rotation between the inner and outer friction plates 326. Thus, planet carrier 312 is fixedly connected to the front end housing via the brake gear ring 321 mounted on planet carrier 312, the compressed inner and outer friction plates 326, and the yoke assembly, eliminating rotational freedom.
[0053] When the electromagnetic brake 32 is energized, the current in the coil 328 generates an electromagnetic force in the yoke. Under this electromagnetic force, the armature 324 overcomes the thrust of the compression spring and moves rightward. This releases the compressed friction plate assembly, creating a gap between the inner and outer friction plates 326. This allows the inner and outer friction plates 326 to rotate freely relative to each other. This allows the planet carrier 312 to rotate freely relative to the front cover.
[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A four-in-one permanent magnet synchronous motor, characterized in that: The invention comprises a housing (1), wherein a permanent magnet motor (2), a reducer (3) linked to the permanent magnet motor (2), and a motor controller (4) for controlling the working state of the permanent magnet motor (2) are arranged in the housing (1); and a rectifier component (5) for converting external current to drive the permanent magnet motor (2) to rotate is arranged on the housing (1); The reducer (3) comprises a planetary reduction mechanism (31) connected to the output shaft of the permanent magnet motor (2) and an electromagnetic brake (32) for controlling the operation of the planetary reduction mechanism (31).
2. The four-in-one permanent magnet synchronous motor according to claim 1, characterized in that: The housing (1) comprises a middle housing (11), a front end housing (12) and a rear end housing (13) are respectively provided at both ends of the middle housing (11), the permanent magnet motor (2) is provided in the middle housing (11), the motor controller (4) is provided in the rear end housing (13), and the reducer (3) is provided in the front end housing (12).
3. The four-in-one permanent magnet synchronous motor according to claim 2, characterized in that: The outer periphery of the middle shell (11) is uniformly provided with axially penetrating water channels (14), and ribs (15) for partitioning are provided between the water channels (14). The matching portion of the rear end cover shell (13) and the water channel (14) of the middle shell (11) is provided with a groove that can communicate with the through water channels (14) of adjacent middle shells (11). The matching portion of the front end cover shell (12) and the water channel (14) of the middle shell (11) is provided with a groove that communicates with the through water channels (14) of adjacent middle shells (11). The groove of the front end cover shell and the groove of the rear end cover shell differ by an angle of the through water channel (14) of the middle shell (11). After the front end cover shell (12), the middle shell (11) and the rear end cover shell (13) are connected into one by bolts, a closed serpentine water channel is formed.
4. The four-in-one permanent magnet synchronous motor according to claim 1, characterized in that: The planetary reduction mechanism (31) comprises a sun gear (311) connected to the output shaft of the permanent magnet motor (2); a planet carrier (312) is provided on the outside of the sun gear (311); a plurality of planetary gears (313) meshing with the sun gear (311) are provided on the planet carrier (312); a ring gear (314) is provided on the housing (1); the planetary gears (313) mesh with the ring gear (314) for transmission; and an output wheel shaft (315) extending out of the housing (1) is provided on the planet carrier (312).
5. The four-in-one permanent magnet synchronous motor according to claim 4, characterized in that: The electromagnetic brake (32) comprises a brake gear ring (321) arranged at the end of the planetary carrier (312) and a yoke assembly (322) arranged on the housing (1); a friction plate baffle (323) is screwed to one end of the yoke assembly (322) close to the permanent magnet motor (2); an armature (324) is slidably arranged in the yoke assembly (322); a plurality of inner friction plates (325) and outer friction plates (326) are arranged between the armature (324) and the friction plate; the plurality of inner friction plates (325) The outer friction plate (326) is axially installed at intervals. The yoke assembly (322) is provided with a slide groove (327) for the outer friction plate (326) to slide. The inner friction plate (325) is provided with a latching tooth that cooperates with the brake gear ring (321). The yoke assembly (322) is provided with a coil (328) for energizing and adsorbing the armature (324). A compression spring is provided between the yoke assembly (322) and the armature (324) for pressing the armature (324) toward the planet carrier (312).
6. The four-in-one permanent magnet synchronous motor according to claim 2, characterized in that: The end of the front end housing is provided with a detachable front end cover, and the front end cover and the front end housing are radially sealed by an O-ring.
7. The four-in-one permanent magnet synchronous motor according to claim 1, characterized in that: The rectifier assembly (5) comprises rectifier and filter electrical components for rectifying external input three-phase alternating current into direct current as a partial power input of the controller, and a relay for selecting between external three-phase alternating current input and external direct current input.
8. The four-in-one permanent magnet synchronous motor according to claim 7, characterized in that: The motor controller (4) comprises a main control board (41), an IGBT drive module electrically connected to the main control board (41), and an IGBT module (42).
9. The four-in-one permanent magnet synchronous motor according to claim 8, characterized in that: The IGBT module (42) is provided with a copper plate, an IGBT water cooling module is provided on the copper plate, a serpentine cooling water channel (14) is provided in the IGBT water cooling module, and IGBT cooling water joints communicating with the serpentine cooling water channel (14) are provided at both ends of the serpentine cooling water channel (14).
10. The four-in-one permanent magnet synchronous motor according to claim 8, characterized in that: The IGBT cooling water connector is in communication with a serpentine water path in the housing (1).