An electric machine

Abstract

A motor comprises a flexible circuit assembly, the flexible circuit assembly comprises a flexible circuit part and a first connecting part, the flexible circuit part and the first connecting part are an integral piece, the flexible circuit part has a conductive layer, the flexible circuit part is provided with a winding at the conductive layer, the flexible circuit assembly comprises an encoder, and the encoder is attached to the first connecting part. The motor comprises a flexible circuit assembly, the flexible circuit assembly comprises a flexible circuit part and a first connecting part, the flexible circuit part and the first connecting part are an integral piece, the flexible circuit part has a conductive layer, the flexible circuit part is provided with a winding at the conductive layer, the flexible circuit assembly comprises an encoder, and the encoder is attached to the first connecting part. The connection reliability of the encoder and the first connecting part is high, and the reliability of motor detection is improved.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more particularly to a motor. Background Technology

[0002] Slotless AC motors are widely used in fields where miniaturization and high performance are required, such as robots and medical devices.

[0003] Because it is necessary to detect the rotation speed and running angle of the motor, an encoder is currently used for detection. The encoder is fixedly mounted on the PCB board, and the motor is connected to the PCB board through 2 power lines and 3 signal lines. There are many wires, and they are usually soldered to the PCB by hand, which is prone to cold solder joints. The reliability of motor detection needs to be further improved. Utility Model Content

[0004] This application provides a motor, the motor including a flexible circuit assembly, the flexible circuit assembly including a flexible circuit part and a first connecting part, the flexible circuit part and the first connecting part being an integral part, the flexible circuit part having a conductive layer, the flexible circuit part having a winding on the conductive layer, the flexible circuit assembly including an encoder, the encoder being mounted on the first connecting part.

[0005] The motor includes a flexible circuit assembly, which includes a flexible circuit section and a first connecting section. The flexible circuit section and the first connecting section are an integral part. The flexible circuit section has a conductive layer and a winding on the conductive layer. The flexible circuit assembly includes an encoder, which is mounted on the first connecting section. The connection between the encoder and the first connecting section has high reliability, thereby improving the reliability of motor detection. Attached Figure Description

[0006] Figure 1 This is a three-dimensional structural diagram of the motor of this application;

[0007] Figure 2 for Figure 1 A cross-sectional view;

[0008] Figure 3 for Figure 2 A partially enlarged structural diagram of part A;

[0009] Figure 4 for Figure 1 A schematic diagram of the structure of the electric motor after removing its outer casing;

[0010] Figure 5 for Figure 1 A schematic diagram of a partial structure;

[0011] Figure 6 for Figure 5 A magnified schematic diagram of part A in the middle section;

[0012] Figure 7 This is a schematic diagram of the structure of the flexible circuit board of this application before winding, which has three-phase windings and two coils in each phase winding.

[0013] Figure 8 for Figure 7 A schematic diagram of the coil arrangement within the A-phase stator winding;

[0014] Figure 9 for Figure 7 A schematic diagram of the coil arrangement within the B-phase stator winding;

[0015] Figure 10 for Figure 7 A schematic diagram of the coil arrangement within the C-phase stator winding;

[0016] Figure 11 This is a schematic diagram of the structure of the flexible circuit board of this application before winding, which has three-phase windings and each phase winding has three coils.

[0017] Figure 12 for Figure 11 A schematic diagram of the coil arrangement in one phase of the stator winding of a three-phase winding;

[0018] Figure 13 for Figure 11 A schematic diagram of the coil arrangement in one of the stator windings of a three-phase winding;

[0019] Figure 14 for Figure 11 A schematic diagram of the coil arrangement in one phase of the stator winding of a three-phase winding;

[0020] Figure 15 This is a partial structural diagram of the first and fourth connecting parts of this application, both of which are rigid circuit boards.

[0021] Figure label:

[0022] Stator yoke 1,

[0023] Flexible circuit section 2, second substrate 21, first coil 221, first sub-oblique segment 2211, second sub-oblique segment 2212, third sub-oblique segment 2213, fourth sub-oblique segment 2214, first vertical segment 2215, second vertical segment 2216, second coil 222, third coil 223, fourth coil 224, fifth coil 225, sixth coil 226, seventh coil 227, eighth coil 228, ninth coil 229, first conductive layer 23, second conductive layer 24, first conductive part 25, first sub-conductive part 251, second sub-conductive part 252, second conductive part 26, third sub-conductive part 261, fourth sub-conductive part 262, fifth sub-conductive part 263.

[0024] Driver's bare die / Driver 3, MCU's bare die / MCU4

[0025] First connecting part 5, first support member 6, second connecting part 7, first sub-connecting part 71, second sub-connecting part 72, third connecting part 8, plug-in terminal 9, second support member 10, fourth connecting part 20, fifth connecting part 30

[0026] Encoder 02,

[0027] Housing 03, bearing support 04, first groove 041, first mounting cavity 042

[0028] Rotor 05, magnetic component 051, rotor shaft 052, first stop part 0521, second stop part 0522, first bearing 06, end cover 07, second bearing 08, magnetic disc 09. Detailed Implementation

[0029] refer to Figures 1-3 An electric motor includes a flexible circuit assembly, which includes a flexible circuit section 2 and a first connecting section 5. The flexible circuit section 2 and the first connecting section 5 are integral. The flexible circuit section 2 has a conductive layer and a winding on the conductive layer. The flexible circuit assembly includes an encoder, which is attached to the first connecting section.

[0030] The flexible circuit assembly includes a flexible circuit section 2 and a first connecting section 5, which are integral components. The flexible circuit section 2 has a conductive layer and a winding on the conductive layer. The flexible circuit assembly includes an encoder, which is mounted on the first connecting section. The encoder and the first connecting section 5 have high reliability in connection, thereby improving the reliability of motor detection.

[0031] The flexible circuit assembly includes a driver die / driver 3 and an MCU die / MCU4. The driver die / driver 3 is mounted on the first connection part 5, and the MCU die / MCU4 is mounted on the first connection part 5. The connection between the driver die / driver 3 and the MCU die / MCU4 and the first connection part 5 has high reliability, thereby improving the reliability of control and / or drive.

[0032] The bare die / driver 3 and the bare die / MCU 4 of the MCU are mounted with the first connection part 5 to form a complete electrical path, realizing functions such as signal transmission and power supply, which is conducive to the miniaturization of the motor and the integration of drive and control.

[0033] A bare die has an integrated circuit structure, and bare die mounting includes the following core steps:

[0034] Placement: Precisely align the bare die and place it on the first connecting part 5.

[0035] Fixation: Mechanical fixation is achieved through adhesive materials (such as conductive silver paste).

[0036] Connection: Establishing an electrical path.

[0037] The steps for mounting the encoder, driver, MCU and the first connection part are similar to those described above, and will not be repeated here.

[0038] refer to Figure 3 The bare die / driver 3 and the bare die / MCU 4 of the MCU are located on the same side of the first connection part 5, which can reduce the steps of equipment repositioning, simplify the production line configuration, and the pick and place machine only needs to optimize parameters (such as Z-axis height) for a single plane, reducing debugging time. Adhesive, solder paste and other auxiliary materials can be sprayed in the same area, reducing costs.

[0039] refer to Figure 3 The bare die of the driver / driver 3 and the bare die of the MCU / MCU4 are disposed separately in the first connection part 5 to reduce the height of the motor; or, the bare die of the driver / driver 3 and the bare die of the MCU / MCU4 are stacked to reduce the radial dimension of the motor.

[0040] The motor includes an encoder 02, which is mounted on the first connecting part 5 and is located on the side of the first connecting part 5 away from the bare die / drive 3 of the drive.

[0041] refer to Figure 2 The motor includes a rotor 05 and a magnetic disc 09. The rotor 05 includes a rotor shaft 052 with a first mounting groove recessed at one end face of the rotor shaft. The magnetic disc 09 is located in the first mounting groove. In the axial direction of the rotor shaft 052, the encoder 02 is disposed opposite to the magnetic disc 09.

[0042] refer to Figure 3 and Figure 5 The first connecting part 5 is a flexible circuit board. The flexible circuit assembly includes a first support member 6. The first connecting part 5 is disposed on the first support member 6. The first support member 6 is made of a material with a certain degree of hardness, such as plastic, to support the first connecting part 5, reduce the deformation of the first connecting part 5, facilitate the installation and positioning of the encoder 02, and improve the stability of the encoder mounting. Alternatively, the first connecting part 5 may be a rigid circuit board, and the flexible circuit part and the first connecting part 5 may be in the form of a rigid-flex board, which will not be elaborated here.

[0043] refer to Figure 1The motor includes a stator, a housing 03 and a bearing support 04. The stator includes a stator yoke 1, which has a receiving cavity. The flexible circuit section 2 is wound in the receiving cavity.

[0044] refer to Figures 7-14 The flexible circuit section 2 includes a second substrate 21 and has at least two conductive layers, including a first conductive layer 23 and a second conductive layer 24. The first conductive layer 23 is located on one side of the second substrate 21, and the second conductive layer 24 is located on the other side of the second substrate 21. The winding includes a coil, with a portion of the same coil located on the first conductive layer 23 and another portion of the same coil located on the second conductive layer 24. The flexible circuit section includes a first conductive portion 25 penetrating the second substrate 21, which electrically connects the portion of the same coil located on the first conductive layer 23 and the portion located on the second conductive layer 24. Alternatively, the winding includes a coil located on the same conductive layer. The winding is disposed in the flexible circuit section 2, and the winding is formed on the conductive layers on both sides of the second substrate 21. This allows the radial thickness of the winding to be relatively thinner than the thickness of the stator winding formed by enameled wire, resulting in better heat dissipation. Furthermore, this approach reduces the risk of coil misalignment, thereby improving magnetic field balance and consistency.

[0045] The flexible circuit section 2 is formed by rolling a flexible circuit board. Before rolling, it, along with the first connecting section 5 and the second connecting section 7 and the third connecting section 8 described below, are formed on the same flexible substrate by etching and other processes to create windings and the necessary signal transmission, power supply and other circuits. Then, the part belonging to the flexible circuit section 2 is rolled into a single unit, which is easy to process, has a compact structure and high stability. At the same time, the wafers of the MCU and control components are packaged and mounted on the first connecting section 5, resulting in a compact structure, high reliability and mass production capability.

[0046] The second substrate 21 is made of polyimide or other materials with high temperature resistance and good insulation properties to prevent short circuits between the two conductive layers. The coil is disposed within the conductive layer, which protects the coil. The manufacturing process of the flexible circuit section 2, the first connection section 5, etc., can employ existing production processes, using photolithography, etching, and deposition techniques to achieve high-precision manufacturing of the coil.

[0047] refer to Figure 7 and Figure 11 Each phase winding includes at least two coils connected in series. The flexible circuit section 2 includes a second conductive section 26, through which two coils of the same phase winding are electrically connected.

[0048] The second conductive portion 26 is disposed near the center of the second substrate 21 relative to the first conductive portion 25. The first conductive portion 25 includes a plurality of first sub-conductive portions 251 and a plurality of second sub-conductive portions 252. The first sub-conductive portions 251 and the second sub-conductive portions 252 are located on opposite sides of the second substrate 21, and the second conductive portion 26 is located between the first sub-conductive portions 251 and the second sub-conductive portions 252.

[0049] The coil includes oblique segments. In the same coil, the oblique segment located on the first conductive layer 23 is defined as the first oblique segment, and the oblique segment located on the second conductive layer 24 is defined as the second oblique segment. The first sub-conductive part 251 is electrically connected to the adjacent first oblique segment and the second oblique segment located on one side of the second substrate 21, and the second sub-conductive part 252 is electrically connected to the adjacent first oblique segment and the second oblique segment located on the other side of the second substrate 21.

[0050] The first sub-conductive portion 251 is arranged in the length direction of the flexible circuit portion 2 (before winding), and the second sub-conductive portion 252 is arranged in the length direction of the flexible circuit portion 2 (before winding). The first sub-conductive portion 251 and the second sub-conductive portion 252 are parallel.

[0051] The first oblique segment includes multiple first sub-oblique segments 2211 and multiple second sub-oblique segments 2212 arranged side by side; the second oblique segment includes multiple third sub-oblique segments 2213 and multiple fourth sub-oblique segments 2214 arranged side by side; the coil includes a vertical segment. In the same coil, the vertical segment located in the first conductive layer 23 is defined as the first vertical segment 2215, and the vertical segment located in the second conductive layer 24 is defined as the second vertical segment 2216. The first vertical segment 2215 is electrically connected to the first sub-oblique segments 2211 and the second sub-oblique segments 2212, and the second vertical segment 2216 is electrically connected to the third sub-oblique segments 2213 and the fourth sub-oblique segments 2214.

[0052] Next, taking a three-phase motor as an example, refer to... Figures 7-10 Each phase has two coils, including a first coil 221, a second coil 222, a third coil 223, a fourth coil 224, a fifth coil 225, and a sixth coil 226. The first coil 221 and the fourth coil 224 form the A-phase winding, the third coil 223 and the sixth coil 226 form the B-phase winding, and the second coil 222 and the fifth coil 225 form the C-phase winding. In the attached diagram, the coils represented by solid lines are located in the first conductive layer 23, and those represented by dashed lines are located in the second conductive layer 24.

[0053] The second conductive part 26 includes a third sub-conductive part 261, a fourth sub-conductive part 262 and a fifth sub-conductive part 263. The third sub-conductive part 261 is electrically connected to the first coil 221 and the fourth coil 224. The fourth sub-conductive part 262 is electrically connected to the third coil 223 and the sixth coil 226. The fifth sub-conductive part 263 is electrically connected to the second coil 222 and the fifth coil 225.

[0054] The first vertical segment 2215 and the second vertical segment 2216 of the same phase are arranged opposite to each other. That is, the second vertical segment 2216 of the first coil 221 is arranged opposite to the first vertical segment 2215 of the fourth coil 224. In the projection of the first surface, the second vertical segment 2216 of the first coil 221 and the first vertical segment 2215 of the fourth coil 224 coincide. The same arrangement is made for phase B and phase C, which will not be described in detail here.

[0055] refer to Figures 11-14 Each phase winding has three coils: coil 221, coil 222, coil 223, coil 224, coil 225, coil 226, coil 227, coil 228, and coil 229. Coils 221, 222, and 223 form one phase winding of the three-phase winding; coils 224, 225, and 226 form another phase winding; and coils 227, 228, and 229 form yet another phase winding. In the attached diagram, coils represented by solid lines are located in the first conductive layer 23, while those represented by dashed lines are located in the second conductive layer 24.

[0056] The second conductive part 26 includes a third sub-conductive part 261, a fourth sub-conductive part 262, and a fifth sub-conductive part 263. The third sub-conductive part 261 is electrically connected to the first coil 221 and the third coil 223. The third coil 223 is directly connected to the second coil 222. The fourth sub-conductive part 262 is electrically connected to the fourth coil 224 and the sixth coil 226. The sixth coil 226 and the fifth coil 225 are directly connected. The fifth sub-conductive part 263 is electrically connected to the seventh coil 227 and the ninth coil 229. The ninth coil 229 and the eighth coil 228 are directly connected.

[0057] The first vertical segment 2215 of one phase and the second vertical segment 2216 of another phase are arranged opposite to each other. That is, the second vertical segment 2216 of one phase of the three-phase winding is arranged opposite to the first vertical segment 2215 of another phase of the three-phase winding, and the second vertical segment 2216 of another phase of the three-phase winding is arranged opposite to the first vertical segment 2215 of yet another phase of the three-phase winding. In the projection of the first surface, the second vertical segment 2216 of one phase of the three-phase winding coincides with the first vertical segment 2215 of another phase of the three-phase winding, and the second vertical segment 2216 of another phase of the three-phase winding coincides with the first vertical segment 2215 of yet another phase of the three-phase winding. This will not be elaborated here.

[0058] After winding, in the radial direction of the flexible circuit section 2, the first vertical segment 2215 of the first coil 221 is opposite to the second vertical segment 2216 of the ninth coil 229, the first vertical segment 2215 of the second coil 222 is opposite to the second vertical segment 2216 of the eighth coil 228, and the first vertical segment 2215 of the third coil 223 is opposite to the second vertical segment 2216 of the seventh coil 227.

[0059] The first conductive part 25 can be formed by forming a hole in the second substrate 21 by mechanical drilling, laser drilling, etc., and then copper plating is performed in the hole. The second conductive part 26 can be formed in the same way, which will not be described in detail here.

[0060] Before winding, the flexible circuit section can be polygonal, circular, elliptical, etc., which will not be elaborated here.

[0061] refer to Figure 2 The outer shell 03 is fitted onto the stator yoke 1 and the bearing support 04. The bearing support 04 is located on one side of the flexible circuit section. The bearing support 04 has a first groove 041, which is recessed into the outer peripheral wall of the bearing support 04. The flexible circuit assembly includes a second connecting part 7, which is integral with the flexible circuit section. The flexible circuit section is located at one end of the second connecting part 7, and the first connecting part 5 is located at the other end of the second connecting part 7. At least a portion of the second connecting part 7 is located in the first groove 041, and the first connecting part 5 is located inside the outer shell 03, which is beneficial for the miniaturization of the motor.

[0062] refer to Figure 2 In the axial direction of the flexible circuit section 2, the first connecting part 5 is opposite to the flexible circuit section 2.

[0063] refer to Figure 2 and Figure 4The second connecting portion 7 includes a first sub-connecting portion 71 and a second sub-connecting portion 72. The first sub-connecting portion 71 extends axially in the flexible circuit portion 2 and extends from the end of the second sub-connecting portion 72 away from the flexible circuit portion. The second sub-connecting portion 72 extends radially in the flexible circuit portion. The second sub-connecting portion 72 is at least partially opposite to the stator yoke 1, reducing the size of the motor. The second sub-connecting portion 72 is located on one side of the stator yoke 1 and is bonded to the stator yoke 1, reducing the sway of the second connecting portion 7 during motor operation, reducing the possibility of tearing between the second connecting portion 7 and the flexible circuit portion, and improving the reliability and lifespan of the motor.

[0064] refer to Figure 1 and Figures 5-6 The flexible circuit assembly includes a third connecting part 8 and a plug-in terminal 9. The third connecting part 8 and the first connecting part 5 are an integral part. The third connecting part 8 extends from the first connecting part 5 and is a flexible circuit board. The plug-in terminal 9 is attached to the third connecting part 8 to improve the reliability of the motor.

[0065] refer to Figure 1 and Figures 5-6 The motor includes a second support member 10, and a housing 03 is sleeved on the second support member 10. The second support member 10 is disposed near the end face of the housing 03. A third connecting part 8 is attached to the side of the second support member 10 facing away from the first encoder 02. A portion of the third connecting part 8 is sandwiched between the plug-in terminal 9 and the second support member 10. The second support member 10 is interference-fitted with the housing 03. The second support member 10 is provided with a groove. The third connecting part 8 can be adaptively bent and pass through the groove to partially adhere to the second support member 10, thereby further fixing the plug-in terminal 9. The structure is compact.

[0066] refer to Figure 2 The motor includes a rotor 05, which includes a magnetic component 051 and a rotor shaft 052. The magnetic component 051 is fixedly connected to the rotor shaft 052. The two ends of the stator yoke 1 are through-connected. The magnetic component 051 is located in the accommodating cavity. The flexible circuit part 2 is located between the inner wall of the stator yoke 1 and the outer wall of the magnetic component 051. The bearing support 04 has a first mounting cavity 042. The motor includes a first bearing 06, which is located in the first mounting cavity 042. The rotor shaft 052 has a first stop part 0521. The first bearing 06 is sleeved on the rotor shaft 052, and the first bearing 06 abuts against the first stop part 0521. The motor includes an end cover 07, and a housing 03 is sleeved on the end cover 07. The motor includes a second bearing 08, one side of which abuts against the end cover 07. The rotor shaft 052 has a second stop part 0522. The second bearing 08 is sleeved on the rotor shaft 052, and the other side of the second bearing 08 abuts against the second stop part 0522.

[0067] refer to Figure 15The first connecting part 5 is a rigid circuit board. The flexible circuit assembly includes a fourth connecting part 20, which is also a rigid circuit board and is opposite to the first connecting part 5. The flexible circuit assembly includes a fifth connecting part 30, which is also a flexible circuit board. The first connecting part 5, the fourth connecting part 20, and the fifth connecting part 30 are a single unit. The bare die / driver 3 is mounted on the first connecting part 5 and / or the bare die / MCU 4 of the MCU is mounted on the fourth connecting part 20. Figure 15 The bare die of the driver / driver 3 is mounted on the first connection part 5, and the bare die of the MCU / MCU4 is mounted on the fourth connection part 20. This will not be described in detail here.

[0068] The flexible circuit assembly includes a third connecting part 8 and a plug-in terminal 9. The third connecting part 8 and the fourth connecting part 20 are an integral piece. The third connecting part 8 extends from the fourth connecting part 20. The third connecting part 8 is a flexible circuit board, and the plug-in terminal 9 is attached to the third connecting part 8.

[0069] The motor described in this application can be used in medical robots, humanoid robots, drones, gimbals, aerospace, etc., which will not be elaborated here.

Claims

1. An electric motor, characterized in that, The motor includes a flexible circuit assembly, which includes a flexible circuit section (2) and a first connection section (5). The flexible circuit section (2) and the first connection section (5) are an integral piece. The flexible circuit section (2) has a conductive layer and a winding is provided on the conductive layer. The flexible circuit assembly includes an encoder (02) which is attached to the first connection section (5).

2. The motor according to claim 1, characterized in that, The first connecting part (5) is a flexible circuit board, and the flexible circuit assembly includes a first support member (6), with the first connecting part (5) disposed on the first support member (6); or the first connecting part (5) is a rigid circuit board.

3. The motor according to claim 1, characterized in that, The flexible circuit assembly includes a second connecting part (7), which is integral with the flexible circuit part (2). The flexible circuit part (2) is located at one end of the second connecting part (7), and the first connecting part (5) is located at the other end of the second connecting part (7). In the axial direction of the flexible circuit part (2), the first connecting part (5) is opposite to the flexible circuit part (2).

4. The motor according to claim 3, characterized in that, The motor includes a rotor (05) and a magnetic disc (09). The rotor (05) includes a rotor shaft (052) with a first mounting groove recessed at one end face of the rotor shaft (052). The magnetic disc (09) is located in the first mounting groove. The encoder (02) is disposed opposite to the magnetic disc (09) in the axial direction of the rotor shaft (052).

5. The motor according to claim 4, characterized in that, The motor includes a stator, a housing (03), and a bearing support (04). The stator includes a stator yoke (1) with a receiving cavity. The flexible circuit part (2) is wound in the receiving cavity. The housing (03) is sleeved on the stator yoke (1) and the housing (03) is sleeved on the bearing support (04). The bearing support (04) is located on one side of the flexible circuit part (2). The bearing support (04) has a first groove (041) recessed in the outer peripheral wall of the bearing support (04). At least a portion of the second connecting part (7) is located in the first groove (041).

6. The motor according to claim 5, characterized in that, The second connecting portion (7) includes a first sub-connecting portion (71) and a second sub-connecting portion (72). The first sub-connecting portion (71) extends axially in the flexible circuit portion (2) and extends from the end of the second sub-connecting portion (72) away from the flexible circuit portion (2). The second sub-connecting portion (72) extends radially in the flexible circuit portion (2). The second sub-connecting portion (72) is at least partially opposite to the stator yoke (1) and is located on one side of the stator yoke (1).

7. The motor according to claim 6, characterized in that, The rotor (05) includes a magnetic component (051), which is fixedly connected to the rotor shaft (052). The stator yoke (1) has two through-holes. The magnetic component (051) is located in the accommodating cavity. The flexible circuit section (2) is located between the inner wall of the stator yoke (1) and the outer wall of the magnetic component (051). The bearing support (04) has a first mounting cavity (042). The motor includes a first bearing (06), which is located in the first mounting cavity (042). The rotor shaft (052) has a first stop portion (0521). The first bearing (06) is sleeved on the rotor shaft (052), and the first bearing (06) abuts against the first stop portion (0521). The motor includes an end cover (07), and the outer shell (03) is sleeved on the end cover (07). The motor includes a second bearing (08), one side of the second bearing (08) abuts against the end cover (07). The rotor shaft (052) has a second stop portion (0522), and the second bearing (08) is sleeved on the rotor shaft (052). The other side of the second bearing (08) abuts against the second stop portion (0522).

8. The motor according to any one of claims 1-6, characterized in that, The flexible circuit assembly includes a driver die / driver (3) and / or an MCU die / MCU (4), wherein the driver die / driver (3) is mounted on the first connection portion (5) and / or the MCU die / MCU (4) is mounted on the first connection portion (5).

9. The motor according to claim 8, characterized in that, The bare die / driver (3) of the driver and the bare die / MCU (4) of the MCU are located on the same side of the first connection part (5), and the bare die / driver (3) of the driver and the bare die / MCU (4) of the MCU are dispersed in the first connection part (5); or, the bare die / driver (3) of the driver and the bare die / MCU (4) of the MCU are stacked.

10. The motor according to claim 9, characterized in that, The encoder (02) is located on the side of the first connection part (5) away from the bare die / driver (3) of the driver, or the wafer of the encoder is located on the side of the first connection part (5) away from the bare die / driver (3) of the driver.

11. The motor according to claim 8, characterized in that, The first connecting part (5) is a rigid circuit board, the flexible circuit assembly includes a fourth connecting part (20), the fourth connecting part (20) is a rigid circuit board, the fourth connecting part (20) is opposite to the first connecting part (5), the flexible circuit assembly includes a fifth connecting part (30), the fifth connecting part (30) is a flexible circuit board, the first connecting part (5), the fourth connecting part (20) and the fifth connecting part (30) are an integral piece, the bare die / driver (3) of the driver is mounted on the first connecting part (5) and / or the bare die / MCU (4) of the MCU is mounted on the fourth connecting part (20).

12. The motor according to claim 11, characterized in that, The flexible circuit assembly includes a third connection part (8) and a plug-in terminal (9). The third connection part (8) and the fourth connection part (20) are an integral part. The third connection part (8) extends from the fourth connection part (20). The third connection part (8) is a flexible circuit board. The plug-in terminal (9) is attached to the third connection part (8).

13. The motor according to any one of claims 1-6, characterized in that, The flexible circuit section (2) includes a second substrate (21) and has at least two conductive layers, including a first conductive layer (23) and a second conductive layer (24). The first conductive layer (23) is located on one side of the second substrate (21), and the second conductive layer (24) is located on the other side of the second substrate (21). The winding includes a coil, a portion of which is located on the first conductive layer (23), and another portion of which is located on the second conductive layer (24). The flexible circuit section (2) includes a first conductive portion (25) penetrating the second substrate (21). The first conductive portion (25) is electrically connected to the portion of the same coil located on the first conductive layer (23) and the portion located on the second conductive layer (24). Alternatively, the winding includes a coil, and the same coil is located on the same conductive layer.

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