Integrated permanent magnet synchronous motor

Abstract

The invention relates to the field of motors, and provides an integrated permanent magnet synchronous motor which comprises a motor body, a controller, a controller shell, a pi-shaped filter and a common mode filter, the controller shell is detachably connected with the motor body, and the controller, the pi-shaped filter and the common mode filter are all arranged in the controller shell. And the motor body, the pi-shaped filter and the common-mode filter are electrically connected with the controller. The permanent magnet synchronous motor solves the problems that a permanent magnet synchronous motor in the prior art is high in cost, tedious in installation and arrangement and low in integration degree, and achieves the technical effects that the motor body is connected with the controller shell, and then the controller is arranged in the controller shell, so that the motor body and the controller are integrated into a whole; therefore, the reliability of the motor is improved, the space utilization is saved, the maintenance cost is reduced, the efficiency is improved, the flexibility is enhanced, and the electromagnetic interference failure can be effectively avoided by arranging the pi-shaped filter and the common-mode filter.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an integrated permanent magnet synchronous motor. Background Art

[0002] At present, the aerial work machinery industry mostly uses three-phase asynchronous motors. Although they can meet the use requirements, three-phase asynchronous motors have disadvantages such as low conversion efficiency, low power factor, low power density, and poor speed regulation performance.

[0003] In order to solve the above problems, some existing technologies apply permanent magnet synchronous motors to the aerial work machinery industry. Although permanent magnet synchronous motors can solve the defects of three-phase asynchronous motors such as low conversion efficiency, low power factor, low power density, and poor speed regulation performance, the aerial work field is currently designed based on a low-voltage platform, and the motor and controller of the permanent magnet synchronous motor are designed separately, which is costly, cumbersome to install and arrange, and has a low degree of integration. Summary of the invention

[0004] The present invention provides an integrated permanent magnet synchronous motor to solve the defects of the permanent magnet synchronous motor in the prior art, such as high cost, complicated installation and arrangement, and low degree of integration. The integrated permanent magnet synchronous motor can save space, reduce maintenance costs, improve efficiency, and enhance flexibility.

[0005] The present invention provides an integrated permanent magnet synchronous motor, comprising a motor body, a controller, a controller housing, a π-shaped filter and a common mode filter. The controller housing is detachably connected to the motor body, the controller, the π-shaped filter and the common mode filter are all arranged in the controller housing, and the motor body, the π-shaped filter and the common mode filter are all electrically connected to the controller.

[0006] An integrated permanent magnet synchronous motor provided according to the present invention also includes a power board and a first shielding cover, the first shielding cover is arranged in the controller housing, the power board is arranged in the first shielding cover, and the power board is electrically connected to the controller.

[0007] An integrated permanent magnet synchronous motor provided according to the present invention also includes a motor back seat and a resolver. The motor back seat is connected between the motor body and the controller housing. The resolver is installed on the motor back seat, and the resolver is electrically connected to the controller.

[0008] An integrated permanent magnet synchronous motor provided according to the present invention also includes a second shielding cover, the second shielding cover is connected to the rear seat of the motor, and the resolver is arranged in the second shielding cover.

[0009] An integrated permanent magnet synchronous motor provided according to the present invention also includes a back cover, and the back cover is connected to one end of the controller housing away from the motor body.

[0010] An integrated permanent magnet synchronous motor provided according to the present invention also includes heat dissipation fins, and the heat dissipation fins are arranged on the side of the rear cover facing away from the controller housing.

[0011] According to an integrated permanent magnet synchronous motor provided by the present invention, a heat dissipation hole is opened on the rear cover.

[0012] An integrated permanent magnet synchronous motor provided according to the present invention also includes a three-phase line. The three-phase line is arranged on a power board, and one end of the three-phase line away from the power board is connected to the motor body.

[0013] According to an integrated permanent magnet synchronous motor provided by the present invention, a common-mode filter includes a common-mode inductor, a first filter capacitor, a second filter capacitor, a first diode and a second diode. The common-mode inductor is connected in series between the CAN interface and the motor drive chip, the first filter capacitor, the second filter capacitor, the first diode and the second diode are connected in parallel between the common-mode inductor and the CAN interface in sequence, and the CAN interface is electrically connected to the controller.

[0014] According to an integrated permanent magnet synchronous motor provided by the present invention, the common mode filter further includes a jumper capacitor, which is arranged in the controller housing and connected in series between the interface ground and the digital ground.

[0015] The integrated permanent magnet synchronous motor provided by the present invention: First, by connecting the motor body and the controller housing to each other and then arranging the controller in the controller housing, the motor body and the controller are integrated into one, thereby improving the reliability of the motor, saving space utilization, reducing maintenance costs, while improving efficiency and enhancing flexibility.

[0016] Second, by integrating the motor body and the controller into one, the motor has the advantages of high power density, high efficiency, small size and light weight.

[0017] Third, a π-shaped filter is set at the high-voltage input end of the controller to cut off the propagation of the high-voltage part of the electromagnetic interference signal. The filter can block the disturbance signal inside the motor controller from propagating outward through the DC cable to avoid the formation of a larger range of conducted and radiated disturbances. By setting a common-mode filter at the low-voltage output end of the controller, the propagation path of the low-voltage part of the electromagnetic interference is cut off; different filtering parameters are set according to different low-voltage signals to prevent the surface conducted disturbance signal from propagating outward through the low-voltage wiring harness to form conducted and radiated disturbances; and then the setting of the π-shaped filter and the common-mode filter can effectively avoid electromagnetic interference failure, ensure good electromagnetic compatibility, and ensure that the motor body and the controller do not interfere with each other and work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a stereoscopic diagram of the integrated permanent magnet synchronous motor provided by the present invention.

[0020] Figure 2 It is a stereoscopic diagram of the motor rear seat of the integrated permanent magnet synchronous motor provided by the present invention.

[0021] Figure 3 The present invention provides a circuit diagram of a π-shaped filter of an integrated permanent magnet synchronous motor device.

[0022] Figure 4 The present invention is a circuit diagram of a common-mode filter of an integrated permanent magnet synchronous motor.

[0023] Figure 5 It is a working flow chart of the integrated permanent magnet synchronous motor device provided by the present invention.

[0024] Reference numerals: 1: Motor body; 101: Motor seat; 102: Mounting ear; 103: Motor back seat; 104: Resolver; 105: Second shielding cover; 106, Motor driver chip, 2: Controller housing; 201: Mounting plate; 3: Back cover; 301: Heat dissipation hole; 302: Heat dissipation fin; 4: π-shaped filter; 5: Common mode filter; 6: Power board; 601: CAN interface; 602: Common mode inductor; 603: First filter capacitor; 604: First diode; 605: Second diode; 606: Second filter capacitor; 607: Jumper capacitor; 608: Interface ground; 609: Digital ground; 7: First shielding cover; 8: Controller; 9: LISN circuit; 10: Three-phase line. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Combine the following Figures 1 to 5The integrated permanent magnet synchronous motor of the present invention includes a motor body 1, a controller 8, a controller housing 2, a π-shaped filter 4 and a common mode filter 5. The controller housing 2 is detachably connected to the motor body 1. The controller 8, the π-shaped filter 4 and the common mode filter 5 are all arranged in the controller housing 2. The motor body 1, the π-shaped filter 4 and the common mode filter 5 are all electrically connected to the controller 8.

[0027] In the above embodiment, it should be noted that the circuit of the π-shaped filter 4 is a π-shaped filter circuit of the prior art, and the specific working principle is: at low frequency, the impedance of the inductor Lf is low, so the inductor Lf can be regarded as a short circuit, and the impedance of the capacitor Cf and the capacitor Cd is also relatively low. The impedance of the entire circuit is low and the signal can pass smoothly; DUT is the controller 8.

[0028] At high frequencies, the impedance of the inductor Lf is high, which is equivalent to an open circuit, while the impedance of the capacitors Cf and Cd is relatively high. The impedance of the entire circuit is high, so the high-frequency signal is suppressed and cannot pass through.

[0029] The control circuit of the controller 8 adopts the circuit of the controller circuit of the prior art, the control circuit input end of the controller 8 is electrically connected to the power supply, and the π-shaped filter circuit of the π-shaped filter 4 is arranged between the LISN circuit 9 after the power supply and the control circuit of the controller 8; the motor body 1 is a permanent magnet synchronous motor in the prior art, and its circuit and working principle are the same as the circuit and working principle of the permanent magnet synchronous motor in the prior art.

[0030] Specifically, the motor body 1 includes permanent magnets, stators, rotors, bearings, motor housings, junction boxes and other structures. Its working principle is that when three-phase alternating current is passed through the stator winding, a rotating magnetic field will be generated around the stator. The speed of this rotating magnetic field is proportional to the frequency of the current and inversely proportional to the number of pole pairs of the motor; the permanent magnets on the rotor generate a constant magnetic field. When the rotor rotates, this constant magnetic field rotates with the rotation of the rotor. When the rotating magnetic field of the stator interacts with the constant magnetic field of the rotor, electromagnetic induction will be generated in the rotor winding. According to Faraday's law of electromagnetic induction and the Lorentz force law, when the conductor moves in the magnetic field, an induced electromotive force and a force, namely the Lorentz force, will be generated in the conductor. In a permanent magnet synchronous motor, the current in the rotor winding is acted upon by the stator's rotating magnetic field, which causes the rotor to rotate, thereby generating an electromagnetic torque.

[0031] A common mode filter 5 is provided between the output end of the controller 8 and the input end of the motor body 1 .

[0032] The controller housing 2 is connected to the motor body 1 by screwing.

[0033] A sealing ring is provided between the controller housing 2 and the motor body 1 to achieve dustproof and waterproof effects while effectively reducing electromagnetic interference.

[0034] The motor casing of the motor body 1 is grounded, the bearing at one end of the motor body 1 is insulated, and an insulating coating is sprayed on the outer surface of the bearing using a spraying process, so that the motor body 1 is protected from electrical corrosion of the bearing by the current, and at the same time, the circulating current flowing through the motor shaft and the bearing is cut off, thereby achieving the effect of reducing electromagnetic interference from the source.

[0035] It also includes a motor seat 101, a hanging ear 102 and a mounting plate 201. The motor seat 101 is provided on the side of the motor body 1 by screwing or welding to ensure the reliable installation of the motor. The side of the motor body 1 is also provided with a hanging ear 102 by welding to increase the convenience of installing the motor. The side of the controller housing 2 is provided with a mounting plate 201 by screwing.

[0036] The motor housing of the motor body 1 is also provided with heat dissipation fins to ensure the heat dissipation effect and thus ensure the service life of the motor.

[0037] The controller housing 2 is made of an EMI metal shielding cover structure.

[0038] The technical effects achieved by the above embodiment are as follows: First, by connecting the motor body 1 and the controller housing 2 to each other and then setting the controller 8 in the controller housing 2, the motor body 1 and the controller 8 are integrated into one, thereby improving the reliability of the motor, saving space utilization, reducing maintenance costs, and improving efficiency and enhancing flexibility.

[0039] Second, by integrating the motor body 1 and the controller 8 into one, the motor has the advantages of high power density, high efficiency, small size and light weight.

[0040] Third, a π-shaped filter 4 is provided at the high-voltage input end of the controller 8 to cut off the propagation of the high-voltage part of the electromagnetic interference signal. The filter can block the disturbance signal inside the motor controller from propagating outward through the DC cable to avoid the formation of a larger range of conducted and radiated disturbances. By providing a common-mode filter 5 at the low-voltage output end of the controller 8, the propagation path of the low-voltage part of the electromagnetic interference is cut off; different filtering parameters are set according to different low-voltage signals to prevent the surface conducted disturbance signal from propagating outward through the low-voltage wiring harness to form conducted and radiated disturbances; and further, the setting of the π-shaped filter 4 and the common-mode filter 5 can effectively avoid electromagnetic interference failure, ensure good electromagnetic compatibility, and ensure that the motor body 1 and the controller 8 do not interfere with each other and work normally.

[0041] Optional, such as Figure 1 and Figure 5As shown, it also includes a power board 6 and a first shielding cover 7 . The first shielding cover 7 is arranged in the controller housing 2 . The power board 6 is arranged in the first shielding cover 7 . The power board 6 is electrically connected to the controller 8 .

[0042] In the above optional embodiment, it should be noted that the power amplifier circuit of the power board 6 is the power amplifier circuit of the motor controller of the prior art; specifically, the power amplifier circuit of the power board 6 is connected in series after the common mode filter circuit of the common mode filter 5, and is used to be directly electrically connected to the input end of the motor body 1; its power amplifier circuit includes structures such as a preamplifier, a drive amplifier and a power amplifier; the working principle is that the input signal is initially amplified by the preamplifier to improve the voltage amplitude and signal-to-noise ratio of the signal. The signal amplified by the preamplifier is sent to the drive amplifier for further amplification, and the drive amplifier provides sufficient drive current for the power amplifier to ensure that the power amplifier can work normally. The power amplifier finally amplifies the signal sent by the drive amplifier to form a high-power signal to drive the load. In the power amplification process, the power amplifier needs to withstand a large current and voltage, so it is required to have a high output power and efficiency. The signal amplified by the power amplifier is output to the motor body 1 to realize the operation of the motor body 1; the power board 6 is installed on the controller 8 or on the inner wall of the first shielding cover 7 by screwing or clamping.

[0043] The first shielding cover 7 is an EMI metal shielding cover; the first shielding cover 7 is connected to the controller housing 2 by screwing, welding, clamping, bonding, etc.; the common mode filter 5 is connected to the controller 8 by welding, plugging, or connecting with a signal line; the π-shaped filter 4 is connected to the controller 8 by welding, plugging, or connecting with a signal line.

[0044] The controller 8, power board 6, π-shaped filter 4 and common-mode filter 5 are arranged in partitions, and EMI metal shielding covers are arranged on the periphery of the π-shaped filter 4 and the common-mode filter 5, thereby realizing the compartment arrangement of the filter circuit, the control circuit and the power amplifier circuit, and realizing the spatial isolation of the high and low voltage parts inside the motor controller 8. There is an EMI shielding compartment between the low voltage and the high voltage to prevent the interference signal from directly propagating to the outside in the form of radiation interference through the common-mode filter 5 of the low voltage part.

[0045] The beneficial effect of the above optional embodiment is that the first shielding cover 7 can prevent the electromagnetic radiation of the power amplifier circuit of the power board 6 from reaching the control circuit of the controller 8. Similarly, after the interference of the common mode filter circuit is absorbed, it will not be repeatedly interfered by the control circuit of the controller 8.

[0046] Optional, such as Figure 1 , Figure 2 and Figure 5As shown, it also includes a motor rear seat 103 and a resolver 104 . The motor rear seat 103 is connected between the motor body 1 and the controller housing 2 . The resolver 104 is installed on the motor rear seat 103 . The resolver 104 is electrically connected to the controller 8 .

[0047] The motor further comprises a second shielding cover 105 . The second shielding cover 105 is connected to the motor rear seat 103 , and the resolver 104 is disposed in the second shielding cover 105 .

[0048] In the above optional embodiments, it should be noted that the second shielding cover 105 is connected to the motor rear seat 103 by means of screw connection or snap connection, the motor rear seat 103 is connected to the motor body 1 by means of screw connection or snap connection, an O-ring is arranged between the motor rear seat 103 and the motor body 1, the motor rear seat 103 is connected to the controller housing 2 by means of screw connection, a rubber O-ring is arranged between the motor rear seat 103 and the controller housing 2, and the setting of the O-ring effectively reduces electromagnetic interference while meeting the sealing requirements; the resolver 104 is connected to the motor rear seat 103 by means of screw connection, snap connection or interference fit.

[0049] The second shielding cover 105 is an EMI metal shielding cover.

[0050] The beneficial effect of the above optional embodiment is as follows: through the setting of the second shielding cover 105, since in some high-performance motors, the installation position of the resolver 104 is close to the inside of the motor body 1, its magnetic field is more susceptible to the influence and interference of the motor leakage magnetic field, and the second shielding cover 105 can effectively shield these interferences and significantly optimize the quality of the resolver output signal.

[0051] In addition, the second shielding cover 105 can also protect the resolver 104 from physical damage, such as dust, oil, etc., thereby extending the service life.

[0052] Optional, such as Figure 1 As shown, a rear cover 3 is also included, and the rear cover 3 is connected to one end of the controller housing 2 which faces away from the motor body 1 .

[0053] In the above optional embodiments, it should be noted that the controller housing 2 and the back cover 3 are connected by screwing, snapping, bonding or the like, and a sealing ring is provided between the controller housing 2 and the back cover 3 .

[0054] The beneficial effect of the above optional embodiment is that the controller 8 can be effectively sealed by the arrangement of the rear cover 3 to ensure the reliability and service life of the motor.

[0055] Optionally, a heat dissipation fin 302 is further included, and the heat dissipation fin 302 is provided on the side of the rear cover 3 facing away from the controller housing 2 .

[0056] In the above optional embodiment, it should be noted that the heat dissipation fins 302 and the back cover 3 are formed in one piece.

[0057] The beneficial effect of the above optional embodiment is that the heat dissipation fins 302 can be provided to effectively dissipate the heat of the motor, thereby ensuring the heat dissipation effect of the motor and thereby increasing the service life of the motor.

[0058] Optional, such as Figure 1 As shown, a heat dissipation hole 301 is provided on the back cover 3 .

[0059] In the above optional embodiment, it should be noted that a plurality of heat dissipation holes 301 are provided on the back cover 3 , and the plurality of heat dissipation holes 301 are arranged on the back cover 3 in a rectangular array.

[0060] The beneficial effects of the above optional embodiments are as follows: the heat dissipation effect of the motor is further increased by the provision of the heat dissipation holes 301, the service life of the motor is further increased, and the reliability of the motor is guaranteed.

[0061] Optional, such as Figure 1 As shown, a three-phase line 10 is also included. The power board 6 is provided with the three-phase line 10 , and one end of the three-phase line 10 facing away from the power board 6 is connected to the motor body 1 .

[0062] In the above optional embodiment, it should be noted that a rectangular metal shielding cover is provided at the three-phase line 10 using tinplate, and the good conductivity of tinplate is used to absorb electromagnetic interference transmitted through the air, so as to effectively shield electromagnetic interference.

[0063] Optional, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the common-mode filter 5 includes a common-mode inductor 602, a first filter capacitor 603, a second filter capacitor 606, a first diode 604 and a second diode 605. The common-mode inductor 602 is connected in series between the CAN interface 601 and the motor driver chip 106, the first filter capacitor 603, the second filter capacitor 606, the first diode 604 and the second diode 605 are connected in parallel between the common-mode inductor 602 and the CAN interface 601, and the CAN interface 601 is electrically connected to the controller 8.

[0064] In the above optional embodiments, it should be noted that the first filter capacitor 603, the second filter capacitor 606, the first diode 604 and the second diode 605 are filter capacitors and diodes connected in parallel on the signal line of the CAN bus.

[0065] The first diode 604 and the second diode 605 are both transient suppression diodes, the impedance of the common-mode inductor 602 is between 120Ω per 100MHz and 2200Ω per 100MHz, preferably, the impedance of the common-mode inductor 602 is 600Ω per 100MHz; the capacitance of the first filter capacitor 603 and the second filter capacitor 606 is selected in the range of 22PF to 1000pF, preferably, the capacitance of the first filter capacitor 603 and the second filter capacitor 606 is 100pF.

[0066] The beneficial effects of the above optional embodiments are as follows: the common-mode interference on the differential line can be filtered out by setting the common-mode inductor 602, electrostatic protection can be performed by setting the first diode 604 and the second diode 605, and a low-impedance return path can be provided for electromagnetic interference by setting the first filter capacitor 603 and the second filter capacitor 606; furthermore, the propagation path of the low-voltage part of the electromagnetic interference can be cut off by the common-mode inductor 602, the first filter capacitor 603, the second filter capacitor 606, the first diode 604 and the second diode 605, and different filtering parameters are set according to different low-voltage signals to prevent surface conduction interference signals from propagating outward through the low-voltage wiring harness to form conducted and radiated interference.

[0067] Optional, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the common mode filter 5 further includes a jumper capacitor 607 , which is disposed in the controller housing 2 , and is connected in series between the interface ground 608 and the digital ground 609 .

[0068] In the above optional embodiment, it should be noted that the digital ground 609, also called the logic ground, is the zero potential of various switch signals. The interface ground 608 generally refers to the ground wire used at the connection point between circuits or systems.

[0069] The capacitance of the jumper capacitor 607 is 1000 pF.

[0070] The beneficial effects of the above optional embodiment are: electromagnetic interference can be suppressed and additional starting force can be provided for the motor through the setting of the jumper capacitor 607, thereby increasing the starting convenience of the motor.

[0071] The working principle of the motor is as follows: when in use, the power supply is turned on, and the power supply transmits the electrical signal to the LISN circuit 9, which eliminates or reduces the high-frequency noise and electromagnetic interference on the external power line through the LISN circuit 9 and then inputs it into the π-shaped filter circuit of the π-shaped filter 4. After the π-shaped filter circuit of the π-shaped filter 4 cuts off the high-voltage part of the electromagnetic interference signal, the electrical signal is transmitted to the control circuit of the controller 8, and then the motor start signal output by the controller 8 needs to pass through the common-mode circuit of the common-mode filter 5 to cut off the propagation of the low-voltage part of the electromagnetic interference, and then is transmitted to the motor drive chip 106 of the motor body 1, and then is amplified by the power amplifier circuit of the power board 6 to drive the motor body 1 to start working. At the same time, the resolver 104 will feed back the rotation parameters of the motor body 1 to the controller 8 in real time so that the controller 8 can adjust the control parameters in real time to ensure the stable operation of the motor body 1.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated permanent magnet synchronous motor, characterized in that: The invention comprises a motor body (1), a controller (8), a controller housing (2), a π-shaped filter (4) and a common-mode filter (5), wherein the controller housing (2) is detachably connected to the motor body (1), the controller (8), the π-shaped filter (4) and the common-mode filter (5) are all arranged in the controller housing (2), and the motor body (1), the π-shaped filter (4) and the common-mode filter (5) are all electrically connected to the controller (8).

2. The integrated permanent magnet synchronous motor according to claim 1, characterized in that: It also comprises a power board (6) and a first shielding cover (7), wherein the first shielding cover (7) is arranged in the controller housing (2), the power board (6) is arranged in the first shielding cover (7), and the power board (6) is electrically connected to the controller (8).

3. The integrated permanent magnet synchronous motor according to claim 1, characterized in that: It also includes a motor back seat (103) and a resolver (104), wherein the motor back seat (103) is connected between the motor body (1) and the controller housing (2), the resolver (104) is mounted on the motor back seat (103), and the resolver (104) is electrically connected to the controller (8).

4. The integrated permanent magnet synchronous motor according to claim 3, characterized in that: It also comprises a second shielding cover (105), the second shielding cover (105) being connected to the motor rear seat (103), and the resolver (104) being arranged in the second shielding cover (105).

5. The integrated permanent magnet synchronous motor according to any one of claims 1 to 4, characterized in that: It also comprises a rear cover (3), and one end of the controller housing (2) facing away from the motor body (1) is connected to the rear cover (3).

6. The integrated permanent magnet synchronous motor according to claim 5, characterized in that: It also comprises a heat dissipation fin (302), and the heat dissipation fin (302) is provided on a side of the rear cover (3) facing away from the controller housing (2).

7. The integrated permanent magnet synchronous motor according to claim 5, characterized in that: The rear cover (3) is provided with heat dissipation holes (301).

8. The integrated permanent magnet synchronous motor according to claim 2, characterized in that: It also comprises a three-phase line (10), the three-phase line (10) being arranged on the power board (6), and one end of the three-phase line (10) facing away from the power board (6) being connected to the motor body (1).

9. The integrated permanent magnet synchronous motor according to claim 1, characterized in that: The common-mode filter (5) comprises a common-mode inductor (602), a first filter capacitor (603), a second filter capacitor (606), a first diode (604) and a second diode (605); the common-mode inductor (602) is connected in series between the CAN interface (601) and the motor drive chip (106); the first filter capacitor (603), the second filter capacitor (606), the first diode (604) and the second diode (605) are connected in parallel between the common-mode inductor (602) and the CAN interface (601); and the CAN interface (601) is electrically connected to the controller (8).

10. The integrated permanent magnet synchronous motor according to claim 9, characterized in that: The common mode filter (5) further comprises a jumper capacitor (607), wherein the jumper capacitor (607) is arranged in the controller housing (2), and the jumper capacitor (607) is connected in series between an interface ground (608) and a digital ground (609).

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