Rotary electric machine device and electric power steering device

Abstract

The rotating electric machine apparatus according to the present disclosure includes: a rotating electric machine having a rotating shaft; a control unit which is arranged side by side with the rotating motor in the axial direction along the axis of the rotating shaft and controls the rotating motor; and an electromagnetic shield covering the control unit, the control unit having: a control substrate extending in the axial direction and to which an external connection terminal is connected; and a filter unit that attenuates noise components propagating to the external connection terminal, and the electromagnetic shield covers the entire control substrate and is formed in a cylindrical shape including a first top portion having a through-hole through which the external connection terminal is inserted, and a second top portion disposed closer to the rotating electric machine side than the first top portion. At least a part of the filter unit is mounted on the control substrate, and is disposed between the first apex and the second apex in the axial direction.

Description

Technical Field

[0001] This disclosure relates to rotary electric motor devices and electric power steering devices. Background Technology

[0002] Conventionally, rotary motor devices integrating the rotary motor and control unit are known. For example, the rotary motor and control unit are arranged side-by-side along the axis of rotation of the rotary motor. The control unit includes a power module that supplies current to the windings of the rotary motor and a control board on which a control circuit section for controlling the power module is mounted. In the rotary motor device of Patent Document 1, a so-called longitudinal arrangement is used, in which the power module and control board are arranged axially. In the rotary motor device of Patent Document 2, a so-called transverse arrangement is used, in which the power module and control board are arranged perpendicularly to the axial direction.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 6608555

[0006] Patent Document 2: International Publication No. 2018 / 047342

[0007] Patent Document 3: International Publication No. 2021 / 192202 Summary of the Invention

[0008] The technical problem that the invention aims to solve

[0009] In a rotary electric motor device, noise is generated from the control unit. In the rotary electric motor device of Patent Document 3, a filter section and an electromagnetic shield are provided to suppress the propagation of noise generated by the control unit to the outside of the rotary electric motor device. In the structure of Patent Document 3, a portion of the control board protrudes through the electromagnetic shield to the outside of the electromagnetic shield, and the filter section is disposed on this protrusion. In this case, the through-hole formed in the electromagnetic shield becomes larger, and noise generated in the control unit may leak to the outside through the through-hole.

[0010] In view of the above, the present disclosure aims to provide a rotary motor device and an electric power steering device that can suppress the increase in the size of the rotary motor device and suppress the propagation of noise generated in the control unit to the outside of the rotary motor device.

[0011] Technical solutions to solve technical problems

[0012] One aspect of the rotary motor device disclosed herein includes: a rotary motor having a rotating shaft; a control unit arranged side-by-side with the rotary motor in an axial direction along the axis of the rotating shaft and controlling the rotary motor; and an electromagnetic shield covering the control unit, the control unit having: a control substrate extending along the axial direction and connected to an external connection terminal; and a filter section attenuating noise components propagating to the external connection terminal, the electromagnetic shield covering the entire control substrate and formed as a cylinder including a first top having a through hole for insertion of the external connection terminal and a second top disposed on the side of the rotary motor closer to the first top than the first top, at least a portion of the filter section being mounted on the control substrate and disposed in the axial direction between the first top and the second top.

[0013] One aspect of the electric power steering system disclosed herein includes the aforementioned rotary motor device.

[0014] Invention Effects

[0015] According to this disclosure, a rotary motor device and an electric power steering device can be provided, which can suppress the increase in the size of the rotary motor device and suppress the propagation of noise generated in the control unit to the outside of the rotary motor device. Attached Figure Description

[0016] Figure 1 This is a circuit diagram of the rotary motor device according to Embodiment 1.

[0017] Figure 2 This is a cross-sectional view showing the structure of the electronic device involved in Embodiment 1.

[0018] Figure 3 This is a top view of the electromagnetic shielding component involved in Embodiment 1.

[0019] Figure 4 This is a top view of the rotary electric motor device according to Embodiment 1, showing the state after the housing and electromagnetic shielding have been removed.

[0020] Figure 5 This is a partial cross-sectional view of the rotary electric motor device according to Embodiment 1.

[0021] Figure 6 This is a diagram showing the control board involved in Embodiment 1 as viewed from the first orthogonal direction.

[0022] Figure 7 This is a top view of the electromagnetic shielding component involved in a variation of Embodiment 1.

[0023] Figure 8This is a partial cross-sectional view of the rotary electric motor device according to Embodiment 2.

[0024] Figure 9 This is a partial cross-sectional view of the rotary electric motor device according to Embodiment 3.

[0025] Figure 10 This is a diagram showing the control board involved in Embodiment 4 as viewed from the first orthogonal direction.

[0026] Figure 11 This is a partial cross-sectional view of the rotary electric motor device according to Embodiment 5.

[0027] Figure 12 This is a partial cross-sectional view of the rotary electric motor device according to Embodiment 6.

[0028] Figure 13 This is a partial cross-sectional view of the rotary electric motor device according to Embodiment 7.

[0029] Figure 14 This is a circuit diagram of the rotary motor device according to Embodiment 8.

[0030] Figure 15 This is a cross-sectional view showing the structure of the rotary electric motor device according to Embodiment 8.

[0031] Figure 16 This is a diagram showing the control board involved in Embodiment 8 as viewed from the first orthogonal direction.

[0032] Figure 17 This is a diagram showing the control board involved in the modified example of Embodiment 8 as viewed from the first orthogonal direction.

[0033] Figure 18 This is a schematic structural diagram of the electric power steering device according to Embodiment 9. Detailed Implementation

[0034] The embodiments of this disclosure will now be described with reference to the accompanying drawings. However, the scope of this disclosure is not limited to the following embodiments, and modifications can be made freely within the scope of the technical concept of this disclosure.

[0035] Implementation method 1.

[0036] Figure 1 This is a circuit diagram of the rotary motor device 100 according to Embodiment 1. Figure 2 This is a cross-sectional view of the rotary motor device 100.

[0037] like Figure 1 and Figure 2As shown, the rotary motor device 100 includes a control unit 1 and a rotary motor 2. The control unit 1 and the rotary motor 2 are integrated. The rotary motor device 100 is used, for example, in an electric power steering system mounted on a vehicle. The rotary motor device 100 may also have the function of generating electricity through the drive of a load and using the regenerated electricity to charge a battery.

[0038] like Figure 1 As shown, the control unit 1 includes an inverter circuit 3, a control circuit section 4, a power relay switching element 5, a filter section 17, etc. A battery 6 (power source), an ignition switch 7, and sensors 8 are connected to the control unit 1. Sensors 8 include, for example, a steering angle sensor located near the vehicle's steering wheel to detect the steering angle, a torque sensor to detect the steering torque, and a speed sensor to detect the vehicle's speed.

[0039] Rotary motor 2 is, for example, a three-phase brushless rotary motor. The three phases are U-phase, V-phase, and W-phase. Rotary motor 2 has three-phase windings. Figure 1 In this diagram, the three-phase windings are represented by the symbols Ua, Va, and Wa. The three-phase windings Ua, Va, and Wa are connected in a delta configuration. Alternatively, the three-phase windings Ua, Va, and Wa can be connected in a Y configuration. The rotary motor 2 can be a 2-pole, 2-pair brushed rotary motor. The rotary motor 2 is equipped with a rotating shaft 21 for detecting the rotary motor 2 (see reference). Figure 2 ) Rotation sensor 9 for rotation angle.

[0040] Inverter circuit 3 includes smoothing capacitors 30U, 30V, and 30W respectively, corresponding to the three-phase windings Ua, Va, and Wa; upper arm switching elements 31U, 31V, and 31W; lower arm switching elements 32U, 32V, and 32W; shunt resistors 33U, 33V, and 33W; and rotating motor relay switching elements 34U, 34V, and 34W. Furthermore, the circuit structures corresponding to phases U, V, and W are identical in inverter circuit 3. Therefore, the following explanation refers to phase U. That is, the following explanation also applies to phases V and W.

[0041] The upper arm switching element 31U is electrically connected to the positive terminal of the battery 6, and the lower arm switching element 32U is electrically connected to the negative terminal of the battery 6. The upper arm switching element 31U and the lower arm switching element 32U are connected in series. A rotary motor relay switching element 34U is connected between the upper arm switching element 31U and the lower arm switching element 32U. The rotary motor relay switching element 34U switches the power supply from the portion between the upper arm switching element 31U and the lower arm switching element 32U to the winding Ua of the rotary motor 2, enabling and disabling the flow. The smoothing capacitor 30U functions to suppress power supply voltage fluctuations and noise during switching. A shunt resistor 33U is connected between the lower arm switching element 32U and ground. The shunt resistor 33U is used to detect the current flowing through the winding Ua of the rotary motor 2.

[0042] The control circuit section 4 controls the inverter circuit 3. The control circuit section 4 includes a CPU (Central Processing Unit) 10, a drive circuit 11, an input circuit 12, a power supply circuit 13, etc.

[0043] Power is supplied from battery 6 to power circuit 13 based on the ignition signal from ignition switch 7. Power circuit 13 uses the power supplied from battery 6 to generate a power supply voltage for the normal operation of the various electronic components constituting control unit 1. Power from battery 6 is also supplied to inverter circuit 3 via filter section 17 and power relay switching element 5.

[0044] Sensor class 8 is connected to input circuit 12. Information from sensor class 8 is transmitted to CPU 10 via input circuit 12. Based on this information, CPU 10 calculates and outputs control quantities corresponding to the magnitudes of the currents supplied to the three-phase windings Ua, Va, and Wa of the rotating motor 2, respectively. The output signal of CPU 10 is transmitted to drive circuit 11. Drive circuit 11 drives inverter circuit 3 based on the calculation results of CPU 10. The control of drive circuit 11 is performed on each of the three phases (U phase, V phase, W phase) of rotating motor 2, independently supplying current from inverter circuit 3 to the three-phase windings Ua, Va, and Wa.

[0045] The detection result of the rotation sensor 9 is fed back to the input circuit 12. The CPU 10 uses the rotation angle information obtained from the rotation sensor 9 to calculate the rotation angle of the rotation shaft 21 of the rotary motor 2. Additionally, although not shown in the diagram, the potential difference between the two ends of the shunt resistors 33U, 33V, and 33W, as well as the voltage at the terminals of the three-phase windings Ua, Va, and Wa of the rotary motor 2, are also fed back to the input circuit 12. Based on this information, the CPU 10 calculates the difference between the calculated current value and the detected value, and performs feedback control.

[0046] A power relay switching element 5 is disposed between the battery 6 and the inverter circuit 3. Based on a drive signal from the drive circuit 11, the power relay switching element 5 switches the supply and disconnection of current from the battery 6 to the inverter circuit 3. The power relay switching element 5 can disconnect the current supply to the rotating motor 2.

[0047] CPU10 has an anomaly detection function for detecting abnormalities in the three-phase windings Ua, Va, Wa, etc., of the sensor class 8, drive circuit 11, inverter circuit 3, and rotating motor 2. When an anomaly is detected, CPU10 cuts off the current supply to the phase with the detected anomaly by turning off the corresponding upper arm switching elements 31U, 31V, 31W, lower arm switching elements 32U, 32V, 32W, or rotating motor relay switching elements 34U, 34V, 34W. Alternatively, CPU10 can also turn off the power relay switching element 5, cutting off the current supply to all phases.

[0048] The filter section 17 suppresses noise generated in the inverter circuit 3. Specifically, switching noise is generated due to the PWM (Pulse Width Modulation) control of the inverter circuit 3. The filter section 17 is provided to suppress the transmission of this switching noise from the rotating motor device 100 to the outside. The power supply line and the GND (Ground) line are connected from the battery 6 to the filter section 17.

[0049] The filter section 17 includes a constant-mode coil 17a (coil) and capacitors 17b, 17c, and 17d. The constant-mode coil 17a is used for constant-mode noise. Capacitor 17b is a cross-line capacitor or an X-capacitor. Capacitors 17c and 17d are line bypass capacitors or Y-capacitors. The filter section 17 is an EMI (Electromagnetic Interface) filter that suppresses conducted and radiated noise generated in the inverter circuit 3. The midpoint 17e between capacitors 17c and 17d is the vehicle body ground, electrically connected to the vehicle body via a part of the rotary motor unit 100.

[0050] Furthermore, depending on the noise generated in the rotary motor device 100, the filter section 17 may include a common-mode coil as a coil for common-mode noise, or the normal-mode coil 17a may be omitted. The number of capacitors included in the filter section 17 may be two or less or four or more.

[0051] Next, refer to Figures 2-7 The structure of each part of the rotary electric motor device 100 is explained.

[0052] In this specification, the direction along the axis O of the rotation shaft 21 of the rotary motor 2 is referred to as the axial direction Z. For example... Figure 2 As shown, the rotary motor 2 and the control unit 1 are arranged side-by-side and integrated along the Z-axis. Along the Z-axis, the side where the control unit 1 is located is called the upper side, and the side where the rotary motor 2 is located is called the lower side. The view from the Z-axis is called a top view. The view viewed from the Z-axis is called a top view. Alternatively, the Z-axis may not be perpendicular to the vertical direction. A direction orthogonal to the Z-axis is called the first orthogonal direction X. A direction orthogonal to both the Z-axis and the first orthogonal direction X is called the second orthogonal direction Y. Along the first orthogonal direction X, the side away from the axis center O of the rotation axis 21 is called the outer side of the first orthogonal direction X, and the side facing the axis center O of the rotation axis 21 is called the inner side of the first orthogonal direction X. Along the second orthogonal direction Y, the side away from the axis center O of the rotation axis 21 is called the outer side of the second orthogonal direction Y, and the side facing the axis center O of the rotation axis 21 is called the inner side of the second orthogonal direction Y.

[0053] The rotary electric motor 2 has a rotor and a stator (not shown). The rotor and stator are housed in a rotary electric motor housing 25. The rotor is fixed to a rotating shaft 21. Multiple permanent magnets are arranged on the outer circumferential surface of the rotor. These permanent magnets are arranged such that their polarities (S pole and N pole) alternate circumferentially on the outer circumferential surface of the rotor. The stator is arranged with gaps on the outer circumferential side of the rotor. Three-phase windings Ua, Va, and Wa are wound on the stator. The three-phase windings Ua, Va, and Wa are either distributed or concentrated on the stator. The ends (not shown) of the three-phase windings Ua, Va, and Wa extend towards the control unit 1.

[0054] Next, the structure of the control unit 1 will be described. The control unit 1 includes a control board 14, a power module 35, and a busbar unit 36.

[0055] The control unit 1 is covered by a housing 40. The housing 40 covers the upper part and the outer periphery of the control unit 1. Since the components constituting the control unit 1 are housed in the housing 40, damage to these components can be prevented. A power connector 42 and a signal connector 43 are arranged on the upper part of the housing 40.

[0056] The power connector 42 has a first retaining member 421 and a power connection terminal 422 (external connection terminal) extending downward from the first retaining member 421. The signal connector 43 has a second retaining member 431 and a signal connection terminal 432 extending downward from the second retaining member 431. The first retaining member 421, the second retaining member 431, and the housing 40 are integrally molded from resin material. The power connection terminal 422 and the signal connection terminal 432 are housed in the housing 40. The power connection terminal 422 and the signal connection terminal 432 are inserted through through holes (not shown) formed in the control substrate 14 and are electrically connected to the circuit pattern formed in the control substrate 14. A larger current of the power system flows through the power connector 42, and a smaller current of the signal system flows through the signal connector 43.

[0057] An electromagnetic shielding element 37 with a topped cylindrical shape is provided on the inner side of the housing 40. The electromagnetic shielding element 37 covers the control board 14, the power module 35, and the busbar unit 36. The electromagnetic shielding element 37 is made of metal. The electromagnetic shielding element 37 suppresses noise generated in the control unit 1 from being released to the outside.

[0058] The electromagnetic shielding member 37 has a stepped shape. Specifically, the electromagnetic shielding member 37 has a first top 37a, a second top 37b located below the first top 37a, and a connecting portion 37c connecting the first top 37a and the second top 37b.

[0059] Figure 3 This is a top view of electromagnetic shielding component 37. (Example) Figure 3 As shown, the first top 37a has a through hole 371. The power connection terminal 422 of the power connector 42 and the signal connection terminal 432 of the signal connector 43 are inserted into the through hole 371. The second top 37b has a hole for the second screw 60a (see reference). Figure 5 Through-hole 372. Through-holes for positioning during assembly can also be formed in electromagnetic shielding component 37.

[0060] return Figure 2 A radiator 34 is disposed inside the housing 40. The radiator 34 has a cylindrical base 342 and a column portion 341 protruding upward from the center of the base 342.

[0061] The column portion 341 is disposed inside the electromagnetic shield 37. The column portion 341 extends along the axial direction Z. The axial Z end of the column portion 341 is fixed to the base portion 342. That is, the column portion 341 is cantilevered and supported by the base portion 342.

[0062] Figure 4 This is a top view of the rotary motor assembly 100, showing the state after the housing 40 and electromagnetic shielding 37 have been removed. Figure 4As shown in the top view, the column portion 341 is a rectangle that is longer in the second orthogonal direction Y. A power module 35 is disposed on one side of the column portion 341 in the second orthogonal direction Y. A control board 14 is disposed on one side of the column portion 341 in the first orthogonal direction X. A screw fastening base 343 for fixing the control board 14 to the heat sink 34 is provided on one side of the column portion 341 in the first orthogonal direction X. A busbar unit 36 ​​is disposed on the other side of the column portion 341 in the first orthogonal direction X.

[0063] The base 342 has a large-diameter portion 342a and a small-diameter portion 342b disposed above the large-diameter portion 342a and having a smaller diameter than the large-diameter portion 342a. A rotary motor housing 25 and a casing 40 are fixed to the outer peripheral surface of the large-diameter portion 342a. The base 342 is supported by the rotary motor housing 25. An electromagnetic shielding member 37 is fixed to the outer peripheral surface of the small-diameter portion 342b. Insertion holes (not shown) are formed in the base 342 for the ends of the three-phase windings Ua, Va, and Wa to be inserted. Although not shown, the ends of the three-phase windings Ua, Va, and Wa extend upwards through the insertion holes and connect to the busbar unit 36.

[0064] The power module 35 is longitudinally positioned along the side of the column 341 in the second orthogonal direction Y. Additionally, in Figure 2 In the diagram, power module 35 is located on the rear side of column 341 and is indicated by a double-dotted line. Power module 35 includes upper arm switching elements 31U, 31V, and 31W of inverter circuit 3, lower arm switching elements 32U, 32V, and 32W, shunt resistors 33U, 33V, and 33W, and rotating motor relay switching elements 34U, 34V, and 34W. (The text repeats itself here.) Figure 4 As shown, a first terminal 351 connected to the control board 14 is provided at one end of the power module 35 in the first orthogonal direction X, and a second terminal 352 connected to the busbar unit 36 ​​is provided at the other end. For example, the control board 14 and the first terminal 351 are connected by soldering, and the busbar unit 36 ​​and the second terminal 352 are connected by TIG (Tungsten Insert Gas) soldering.

[0065] Busbar unit 36 ​​has a busbar base 361. The busbar base 361 has a busbar 362 and a resin busbar bracket 363 for embedding the busbar 362. The smoothing capacitors 30U, 30V, and 30W of the inverter circuit 3 and the constant mode coil 17a of the filter section 17 are mounted on the busbar base 361. The busbar 362 is connected to the ends of the three-phase windings Ua, Va, and Wa of the rotating motor 2, the second terminal 352 of the power module 35, the terminals of the smoothing capacitors 30U, 30V, and 30W, the terminals of the constant mode coil 17a, and the power connection terminals 422 (power terminals and GND terminals) of the power connector 42.

[0066] The control board 14 is longitudinally arranged along one side of the post portion 341 in the first orthogonal direction X. That is, the control board 14 is arranged to extend along the axial direction Z and the second orthogonal direction Y. The control board 14 has a first surface 14a facing the inner side of the first orthogonal direction X and a second surface 14b facing the outer side of the first orthogonal direction X. The control circuit section 4, the power relay switching element 5, and the capacitors 17b, 17c, and 17d of the filter section 17 are mounted on the control board 14. In addition, in Figure 2 The control circuit section 4 and the power relay switching element 5 are omitted from the illustration. Additionally, circuit components (not shown) for controlling the inverter circuit 3 are mounted on the control board 14.

[0067] Furthermore, since the current flowing through the drive circuit 11 is relatively small, the drive circuit 11 is mounted on the control board 14. However, the drive circuit 11 can also be configured in the power module 35. Alternatively, since the current flowing through the power relay switching element 5 is relatively large, the power relay switching element 5 can be configured in the power module 35 instead of the control board 14.

[0068] Figure 5 This is a partial cross-sectional view showing the area around the upper part 141 of the control board 14 of the rotary electric motor device 100. (See attached image.) Figure 5 As shown, capacitors 17b, 17c, and 17d are disposed on the upper portion 141 of the control board 14. Capacitors 17b, 17c, and 17d are disposed in the Z-axis direction between the first top 37a and the second top 37b. In this embodiment, capacitors 17b, 17c, and 17d are disposed as a whole above the second top 37b (on the side of the first top 37a). Furthermore, power supply connection terminal 422 and signal connection terminal 432 are connected to the upper portion 141. The filter section 17 prevents noise generated in the inverter circuit 3 from leaking to the outside through the power supply connection terminal 422. Figure 5 In this example, capacitors 17b, 17c, and 17d are disposed on the second surface 14b of the control substrate 14. Capacitors 17b, 17c, and 17d may also be disposed on the first surface 14a of the control substrate 14.

[0069] A through hole 143 is formed on the control substrate 14 for inserting the first screw 60b. A GND pattern 142 is formed on the outer periphery of the through hole 143 on the second surface 14b of the control substrate 14. The GND pattern 142 constitutes part of the wiring pattern that is electrically connected to capacitors 17b, 17c, 17d and power supply connection terminal 422. The GND pattern 142 together with capacitors 17b, 17c, 17d constitutes the filter section 17. Since the filter section 17 is constituted by the GND pattern 142, the reliability of the connection with the power supply connection terminal 422 can be improved while suppressing costs.

[0070] A grounding busbar 38 is provided between the control board 14 and the electromagnetic shield 37. The grounding busbar 38 is electrically connected to the GND pattern 142 and the electromagnetic shield 37. The grounding busbar 38 is formed in an L-shape having a first plate portion 38a and a second plate portion 38b.

[0071] The lower surface of the second plate portion 38b is in contact with the lower surface of the second top portion 37b. A through hole 382 is formed in the second plate portion 38b for inserting the second screw 60a. A fastened portion 39 for fastening the second screw 60a is formed on the lower surface of the second plate portion 38b. The fastened portion 39 is configured to sandwich the second plate portion 38b between itself and the second top portion 37b. The fastened portion 39 is, for example, a hexagonal nut. A resin bracket 61 (resin component) is provided on the lower surface of the second plate portion 38b. The second plate portion 38b is supported from below by the resin bracket 61. The resin bracket 61 is assembled to the grounding busbar 38 by pressing or the like. The resin bracket 61 is held in a non-rotatable manner by the fastened portion 39.

[0072] Along the axis of the second screw 60a, the second top 37b, the second plate portion 38b, and the fastened portion 39 are arranged sequentially from above. In this state, the second screw 60a is inserted from above through the through holes 372 and 382 and fastened to the fastened portion 39. Thus, the second plate portion 38b and the second top 37b are fixed to each other in a close-fitting state, and are electrically connected. Furthermore, at this time, the axis of the second screw 60a is arranged perpendicular to the second top 37b.

[0073] With this structure, it is not necessary to install a fixing component above the second screw 60a to fix the electromagnetic shield 37 and the grounding busbar 38 to each other. Therefore, it is not necessary to ensure the axial Z distance between the electromagnetic shield 37 and the housing 40 for fixing the grounding busbar 38, and it is possible to suppress the increase in the size of the control unit 1 in the axial Z direction.

[0074] In addition, such as Figure 7As shown, a notch 373 can also be provided on the second top 37b in a manner that surrounds the through hole 372. By providing the notch 373, the second top 37b is easier to deform, and the second plate portion 38b and the second top 37b can be fixed more reliably.

[0075] The first plate portion 38a is in contact with the second surface 14b of the control substrate 14. The first plate portion 38a is in contact with the GND pattern 142 of the control substrate 14. A through hole 381 for the insertion of the first screw 60b is formed in the first plate portion 38a. The resin bracket 61 is provided with a downwardly protruding portion 61a. The second plate portion 38b is covered by the protruding portion 61a from the outside of the first orthogonal direction X. A through hole 611 for the insertion of the first screw 60b is formed in the protruding portion 61a. The outer periphery of the through hole 143 of the first surface 14a of the control substrate 14 is supported by the screw fastening base 343 of the heat sink 34.

[0076] Along the axis of the first screw 60b, the protrusion 61a, the first plate portion 38a, the control substrate 14, and the screw fastening base 343 are arranged sequentially toward the inner side of the first orthogonal direction X. In this state, the first screw 60b is inserted through the through holes 611, 381, and 143 from the outer side of the first orthogonal direction X and fastened to the screw fastening base 343. Thus, with the first plate portion 38a in close contact with the control substrate 14, the first plate portion 38a and the control substrate 14 are fixed to the screw fastening base 343, and the first plate portion 38a is electrically connected to the GND pattern 142. In addition, at this time, the axis of the first screw 60a is arranged perpendicular to the control substrate 14.

[0077] Since the first plate portion 38a is positioned outside the first orthogonal direction X of the control board 14, and the first screw 60b is fastened from the outside of the first orthogonal direction X, it is possible to fix the grounding busbar 38 and the control board 14 to the heat sink 34 without, for example, providing a fixing component above the heat sink 34. Therefore, it is possible to suppress the increase in the size of the control unit 1 in the axial Z direction.

[0078] According to the above structure, the GND pattern 142 and the electromagnetic shield 37 are electrically connected via the grounding busbar 38. Furthermore, the first screw 60b is electrically connected to the heat sink 34 by fastening it to the screw fastening base 343. However, the electromagnetic shield 37 and the GND pattern 142 are not electrically connected to the first screw 60b and the heat sink 34. That is, a protrusion 61a of a resin bracket 61, which is an insulating material, is sandwiched between the head of the first screw 60b and the first plate portion 38a. Additionally, the shaft portion of the first screw 60b does not contact the inner surface of the through hole 381 of the first plate portion 38a or the inner surface of the through hole 143 of the control substrate 14. For example, a resin collar, which is an insulating material, may also be disposed on the inner surface of the through hole 381 of the first plate portion 38a and the inner surface of the through hole 143 of the control substrate 14. Therefore, the first screw 60b is electrically insulated from the grounding busbar 38 and the control board 14. Furthermore, the first surface 14a of the control board 14 is electrically insulated from the screw fastening base 343. Therefore, the capacitors 17b, 17c, and 17d of the filter section 17 are grounded via the grounding busbar 38 and the electromagnetic shielding member 37, instead of via the heat sink 34 on which the power module 35, which serves as a noise source, is mounted. Thus, the filter section 17 can effectively suppress the noise generated in the power module 35 (inverter circuit 3).

[0079] Figure 6 This is a view of the control board 14 as seen from the first orthogonal direction X. Figure 6 In the diagram, the first top part 37a and the second top part 37b of the electromagnetic shielding component 37 are indicated by double-dotted lines. Additionally, the second screw 60a is indicated by a dashed line.

[0080] like Figure 6 As shown, when viewed from the first orthogonal direction X, the grounding busbar 38 is positioned at a location overlapping the center of the control board 14 in the second orthogonal direction Y. Additionally, when viewed from the first orthogonal direction X, screws 60a and 60b are also positioned at a location overlapping the center of the control board 14 in the second orthogonal direction Y. Screws 60a and 60b are arranged such that the axis of the second screw 60a, the axis of the first screw 60b, and the axis O of the rotation shaft 21 are all on the same plane. Therefore, by using screws 60a and 60b, the control board 14 can be fixed relative to the electromagnetic shield 37 at the center of the second orthogonal direction Y, improving the vibration resistance and durability of the control board 14.

[0081] As described above, the rotary motor device 100 according to this embodiment includes: a rotary motor 2 having a rotation shaft 21, a control unit 1 arranged side-by-side with the rotary motor 2 in the Z-axis direction and controlling the rotary motor 2, and an electromagnetic shield 37 covering the control unit 1. The control unit 1 has a control board 14 extending in the Z-axis direction and having a power connection terminal 422 connected to a power connector 42, and a filter section 17 for attenuating noise components propagating to the power connection terminal 422. The electromagnetic shield 37 covers the entire control board 14 and is formed in a cylindrical shape, including a first top 37a having a through hole 371 through which the power connection terminal 422 is inserted, and a second top 37b disposed on the side of the rotary motor 2 closer to the first top 37a than the first top 37a. Capacitors 17b, 17c, and 17d of the filter section 17 are mounted on the control board 14 and disposed in the Z-axis direction between the first top 37a and the second top 37b.

[0082] Because capacitors 17b, 17c, and 17d are mounted on the control board 14, compared to the case where a dedicated board and support structure are provided for mounting capacitors 17b, 17c, and 17d, the increase in the size of the rotary motor device 100 can be suppressed, and the cost of the rotary motor device 100 can be reduced. Furthermore, because capacitors 17b, 17c, and 17d are arranged in the Z-axis direction between the first top 37a and the second top 37b, they can be positioned close to the power supply connection terminal 422, and the filter section 17 can effectively attenuate noise components propagating to the power supply connection terminal 422. The control board 14 is entirely covered by an electromagnetic shielding member 37, and a through hole 371 for the power supply connection terminal 422 to be inserted is formed in the first top 37a of the electromagnetic shielding member 37. Therefore, compared to a case where a portion of the control board 14 protrudes outward from the electromagnetic shield 37 through it, the size of the through-hole 371 can be reduced, and the leakage of noise generated in the control unit 1 to the outside through the through-hole 371 can be suppressed. Thus, the propagation of noise generated in the control unit 1 to the outside of the rotary motor device 100 can be suppressed.

[0083] The electromagnetic shielding member 37 has a stepped shape, which has a first top 37a and a second top 37b. By forming a through hole 371 in the first top 37a and using the second top 37b for, for example, fixing to the control substrate 14, the size of the through hole 371 in the first top 37a can be further reduced.

[0084] Additionally, a filter section 17 is formed on the control board 14 and has a GND pattern 142 that is electrically connected to the power supply connection terminal 422. The control unit 1 has a grounding busbar 38 that electrically connects the GND pattern 142 and the electromagnetic shield 37.

[0085] Therefore, the filter section 17 can be grounded via the grounding busbar 38 and the electromagnetic shielding member 37.

[0086] In addition, the rotary motor device 100 also includes a heat sink 34 disposed inside the electromagnetic shield 37. The control unit 1 has a first screw 60b that fixes the grounding busbar 38 and the control board 14 relative to the heat sink 34, and a resin bracket 61 disposed between the grounding busbar 38 and the first screw 60b.

[0087] The grounding busbar 38 and the control board 14 can be fixed relative to the heat sink 34 by the first screw 60b. Furthermore, a resin bracket 61 is disposed between the grounding busbar 38 and the first screw 60b, providing insulation between them. Therefore, the filter section 17 can be grounded via the grounding busbar 38 and the electromagnetic shield 37, without passing through the heat sink 34 where the power module 35, which serves as a noise source, is mounted. This allows for more effective attenuation of noise components propagating to the power connection terminal 422 via the filter section 17.

[0088] In addition, along the axis of the first screw 60b, the resin bracket 61, the grounding busbar 38, the control board 14 and the heat sink 34 are arranged in sequence toward the axis O of the rotation axis 21.

[0089] Therefore, the grounding busbar 38 and the control board 14 can be easily fixed relative to the heat sink 34 using the first screw 60b.

[0090] Additionally, the control unit 1 has a second screw 60a that secures the grounding busbar 38 relative to the second top 37b.

[0091] The grounding busbar 38 can be fixed relative to the second top 37b by means of the second screw 60a.

[0092] Additionally, the control unit 1 has a fastened portion 39 configured to sandwich a grounding busbar 38 between itself and the second top 37b, for fastening by the second screw 60a.

[0093] This allows for more reliable fixing of the grounding busbar 38 relative to the second top 37b.

[0094] In addition, the grounding busbar 38 and the second top 37b are arranged side by side along the axial direction Z.

[0095] Therefore, the second screw 60a can be tightened from above in the Z-axis direction, and the grounding busbar 38 can be more easily fixed relative to the second top 37b.

[0096] Additionally, the control unit 1 includes a grounding busbar 38, a first screw 60b for mounting the grounding busbar 38 to the control board 14, and a second screw 60a for mounting the grounding busbar 38 to the second top 37b. The axes of the first screw 60b and the second screw 60a are arranged on the same plane, including the axis O of the rotation shaft 21.

[0097] Therefore, by using screws 60a and 60b, the control board 14 can be reliably fixed relative to the electromagnetic shield 37, thereby improving the vibration resistance and durability of the control board 14.

[0098] In addition, the axis of the first screw 60b is arranged perpendicularly to the control base plate 14, and the axis of the second screw 60a is arranged perpendicularly to the second top 37b.

[0099] Therefore, the grounding busbar 38 and the control board 14 can be reliably fixed without loosening using the first screw 60b, and the grounding busbar 38 and the electromagnetic shield 37 can be reliably fixed without loosening using the second screw 60a. Thus, the vibration resistance and durability of the control board 14 can be improved.

[0100] In addition, the rotary motor device 100 also has a housing 40 that houses the power supply connection terminal 422 and covers the electromagnetic shielding 37.

[0101] Since the components constituting the control unit 1 are housed in the housing 40, damage to these components can be prevented. In addition, by arranging the control board 14 and the electromagnetic shield 37 inside the housing 40, the increase in the size of the rotary motor device 100 can be suppressed.

[0102] Implementation method 2.

[0103] Next, the rotary electric motor device according to Embodiment 2 will be described. The basic structure of the rotary electric motor device according to this embodiment is the same as that of the rotary electric motor device in Embodiment 1, so the description will focus on the differences.

[0104] Figure 8 This is a partial cross-sectional view of the rotary electric motor device 101 according to Embodiment 2. (See attached image.) Figure 8 As shown, in this embodiment, the fastening part 39 is not provided, and the second screw 60a is screwed into the internal thread portion 383 formed on the grounding busbar 38. The internal thread portion 383 is formed by performing flanging and thread cutting on the grounding busbar 38. By screwing the second screw 60a into the internal thread portion 383, the electromagnetic shield 37 and the grounding busbar 38 are connected. In addition, a recess 612 is formed in the resin bracket 61 to receive the front end of the shaft portion of the second screw 60a.

[0105] In this configuration, the electromagnetic shield 37 and the grounding busbar 38 can be electrically connected without the need for the fastening part 39. Therefore, the cost of the rotary motor assembly 101 can be reduced.

[0106] Implementation method 3.

[0107] Next, the rotary electric motor device according to Embodiment 3 will be described. The basic structure of the rotary electric motor device according to this embodiment is the same as that of the rotary electric motor device in Embodiment 1, so the description will focus on the differences.

[0108] Figure 9 This is a partial cross-sectional view of the rotary electric motor device 102 according to Embodiment 3. (See attached image.) Figure 9 As shown, in this embodiment, screws 60a and 60b are not used in fixing the grounding busbar 38, and through holes 381 and 382 are not formed in the grounding busbar 38. Through holes 143 are not formed in the control substrate 14. The first plate portion 38a is joined to the GND pattern 142 of the control substrate 14 by soldering. For example, the first plate portion 38a is surface-mounted to the GND pattern 142 by reflow solder. The second plate portion 38b is pressed into contact with the second top portion 37b. For example, during assembly, the lower surface of the second top portion 37b can be brought into contact with the second plate portion 38b while the grounding busbar 38 is bent by the second top portion 37b. Alternatively, the grounding busbar 38 can be formed of an elastic member such as a leaf spring. In this case, the elasticity of the grounding busbar 38 allows the second plate portion 38b to be firmly pressed against the second top portion 37b.

[0109] As described above, in the rotary electric motor device 102 according to this embodiment, the grounding busbar 38 is joined to the GND pattern 142 by welding and pressed into contact with the second top 37b. In this case, the GND pattern 142 and the electromagnetic shield 37 can be electrically connected via the grounding busbar 38 without the need for screws or the like. Therefore, the cost of the rotary electric motor device 102 can be reduced.

[0110] Furthermore, the grounding busbar 38 presses into contact with the second top 37b through elastic deformation. This allows for a more reliable electrical connection between the electromagnetic shield 37 and the grounding busbar 38.

[0111] Implementation method 4.

[0112] Next, the rotary electric motor device according to Embodiment 4 will be described. The basic structure of the rotary electric motor device according to this embodiment is the same as that of the rotary electric motor device in Embodiment 1, so the description will focus on the differences.

[0113] Figure 10This is a diagram showing the control board 14 of the rotary electric motor device 103 according to Embodiment 1, viewed from the first orthogonal direction X. Figure 10 In the diagram, the first top part 37a and the second top part 37b of the electromagnetic shielding component 37 are indicated by double-dotted lines. Additionally, the second screw 60a is indicated by a dashed line.

[0114] like Figure 10 As shown, in this embodiment, when viewed from the first orthogonal direction X, the second screw 60a is positioned at a location overlapping the center of the control board 14 in the second orthogonal direction Y, and the first screw 60b is positioned at a location away from the center of the control board 14 in the second orthogonal direction Y. The axis of the second screw 60a is positioned on a first plane including the axis O of the rotation shaft 21, and the axis of the first screw 60b is positioned on a second plane parallel to the first plane. Even in this case, the grounding busbar 38 can be fixed to the control board 14 and the electromagnetic shield 37 using the screws 60a and 60b, and the GND pattern 142 can be electrically connected to the electromagnetic shield 37 via the grounding busbar 38. In addition, by adjusting the positions of the screws 60a and 60b, the design freedom is increased. Therefore, it is possible to suppress the increase in the size of the rotary motor device 103 and reduce the cost of the rotary motor device 103.

[0115] Alternatively, when viewed from the first orthogonal direction X, the first screw 60b can be positioned at a location overlapping the center of the control substrate 14 in the second orthogonal direction Y, and the second screw 60a can be positioned at a location away from the center of the control substrate 14 in the second orthogonal direction Y.

[0116] Implementation method 5.

[0117] Next, the rotary electric motor device according to Embodiment 5 will be described. The basic structure of the rotary electric motor device according to this embodiment is the same as that of the rotary electric motor device in Embodiment 1, so the description will focus on the differences.

[0118] Figure 11 This is a partial cross-sectional view of the rotary electric motor device 104 according to Embodiment 5. (See attached image.) Figure 11 As shown, in this embodiment, the constant-mode coil 17a is disposed on the upper part 141 of the control board 14. That is, capacitors 17b, 17c, 17d and the constant-mode coil 17a are mounted on the control board 14 and disposed in the Z-axis direction between the first top 37a and the second top 37b. As a result, after noise is absorbed by the electromagnetic shielding member 37, noise can be reduced more effectively by the filter section 17.

[0119] Implementation method 6.

[0120] Next, the rotary electric motor device according to Embodiment 6 will be described. The basic structure of the rotary electric motor device according to this embodiment is the same as that of the rotary electric motor device in Embodiment 1, so the description will focus on the differences.

[0121] Figure 12 This is a partial cross-sectional view of the rotary electric motor device 105 according to Embodiment 6. (See attached image.) Figure 12 As shown, in this embodiment, capacitors 17b, 17c, and 17d are arranged in the axial direction Z, and the positions of the sides of capacitors 17b, 17c, and 17d coincide with the position of the upper surface (outer surface) of the second top 37b. Therefore, after noise is absorbed by the electromagnetic shielding member 37, the noise can be immediately reduced by the filter section 17.

[0122] Implementation method 7.

[0123] Next, the rotary electric motor device according to Embodiment 7 will be described. The basic structure of the rotary electric motor device according to this embodiment is the same as that of the rotary electric motor device in Embodiment 1, so the description will focus on the differences.

[0124] Figure 13 This is a partial cross-sectional view of the rotary electric motor device 106 according to Embodiment 7. (See attached image.) Figure 13 As shown, in this embodiment, capacitors 17b, 17c, and 17d are arranged to overlap with the upper surface (outer surface) of the second top 37b in the Z-axis direction. That is, a portion of capacitors 17b, 17c, and 17d is positioned below the upper surface of the second top 37b. In this case, after noise is absorbed by the electromagnetic shielding member 37, noise can also be immediately reduced by the filter section 17.

[0125] Implementation method 8.

[0126] Next, the rotary electric motor device according to Embodiment 8 will be described. The basic structure of the rotary electric motor device according to this embodiment is the same as that of the rotary electric motor device in Embodiment 1, so the description will focus on the differences.

[0127] Figure 14 This is a circuit diagram of the rotary motor device 107 according to Embodiment 8. Figure 15 This is a cross-sectional view of the rotary electric motor device 107.

[0128] like Figure 14 and Figure 15As shown, in this embodiment, the rotary motor 2 has two sets of three-phase windings. Specifically, in addition to the three-phase windings Ua, Va, and Wa, the rotary motor 2 also has a second three-phase winding Ub, Vb, and Wb. Furthermore, the rotary motor device 100 has two sets of control units 1A and 1B. Control units 1A and 1B each have the same structure as the control unit 1 described in Embodiment 1. Therefore, in this embodiment, the structural components of the first control unit 1A are prefixed with the same designation as the corresponding structural components in Embodiment 1. Similarly, the structural components of the second control unit 1B are prefixed with the same designation as the corresponding structural components in Embodiment 1.

[0129] Hereinafter, descriptions of structures identical to those in Embodiment 1 will be omitted, and the focus will be on the differences. For example, control unit 1A includes inverter circuit 3A, control circuit section 4A, power relay switching element 5A, and filter section 17A. The structures of these inverter circuit 3A, control circuit section 4A, power relay switching element 5A, and filter section 17A are the same as those of inverter circuit 3, control circuit section 4, power relay switching element 5, and filter section 17 described in Embodiment 1. Furthermore, control unit 1B includes inverter circuit 3B, control circuit section 4B, power relay switching element 5B, and filter section 17B.

[0130] The first control unit 1A operates the control circuit 4A and the inverter circuit 3A based on input information from the sensor type 8 and the rotation sensor 9, etc. This drives the rotating shaft 21 via the three-phase windings Ua, Va, and Wa. The second control unit 1B operates the control circuit 4B and the inverter circuit 3B based on input information from the sensor type 8 and the rotation sensor 9, etc. This drives the rotating shaft 21 via the three-phase windings Ub, Vb, and Wb. By configuring two control units 1A and 1B, the rotating motor 2 can be driven independently, thus ensuring system redundancy.

[0131] Next, the structure of each part of the rotary electric motor device 107 will be described. For example... Figure 15 As shown, control unit 1A includes control board 14A, power module 35A, and busbar unit 36A. Control unit 1B includes control board 14B, power module 35B, and busbar unit 36B.

[0132] Control units 1A and 1B are covered by housing 40. A power connector 42A and a signal connector 43A, connected to control unit 1A, and a power connector 42B and a signal connector 43B, connected to control unit 1B, are disposed on the upper part of housing 40. Power connector 42A has a first retaining member 421A and a power connection terminal 422A (external connection terminal) extending downward from the first retaining member 421A. Signal connector 43A has a second retaining member 431A and a signal connection terminal 432A extending downward from the second retaining member 431A. Power connector 42B has a third retaining member 421B and a power connection terminal 422B (external connection terminal) extending downward from the third retaining member 421B. Signal connector 43B has a fourth retaining member 431B and a signal connection terminal 432B extending downward from the fourth retaining member 431B. The first retaining member 421A, the second retaining member 431A, the third retaining member 421B, the fourth retaining member 431B, and the housing 40 are integrally molded from resin material. The power connection terminal 422A, the signal connection terminal 432A, the power connection terminal 422B, and the signal connection terminal 432B are housed in the housing 40.

[0133] An electromagnetic shielding member 37 covering the control units 1A and 1B is provided on the inner side of the housing 40. In this embodiment, the electromagnetic shielding member 37 has a first top 37a, two second tops 37b located below the first top 37a, and two connecting portions 37c that connect the first top 37a and the two second tops 37b respectively. A power connection terminal 422A, a signal connection terminal 432A, a power connection terminal 422B, and a signal connection terminal 432B are inserted through a through hole 371 formed in the first top 37a.

[0134] A heat sink 34 is disposed inside the housing 40. A power module 35A is disposed on one side of the pillar 341 of the heat sink 34 in the second orthogonal direction Y. A power module 35B is disposed on the other side of the pillar 341 in the second orthogonal direction Y. That is, the power modules 35A and 35B are disposed sandwiching the pillar 341 in the second orthogonal direction Y. In addition, Figure 15 In the diagram, the positions of power modules 35A and 35B are indicated by double-dotted lines. Additionally, although not shown in the diagram, power module 35A has a first terminal connected to control board 14A at one end in the first orthogonal direction X, and a second terminal connected to busbar unit 36A at the other end. Similarly, power module 35B has a first terminal connected to control board 14B at one end in the first orthogonal direction X, and a second terminal connected to busbar unit 36B at the other end.

[0135] A control substrate 14A is disposed on one side of the pillar portion 341 in the first orthogonal direction X. A control substrate 14B is disposed on the other side of the pillar portion 341 in the first orthogonal direction X. That is, the control substrates 14A and 14B are disposed sandwiching the pillar portion 341 in the first orthogonal direction X.

[0136] Capacitors 17b, 17c, and 17d of filter section 17A are disposed on the upper part 141A of control board 14A. The capacitors 17b, 17c, and 17d of filter section 17A are disposed between the first top 37a and the second top 37b in the Z-axis direction. Capacitors 17b, 17c, and 17d of filter section 17B are disposed on the upper part 141B of control board 14B. The capacitors 17b, 17c, and 17d of filter section 17B are disposed between the first top 37a and the second top 37b in the Z-axis direction.

[0137] A grounding busbar 38A is provided between the control board 14A and the electromagnetic shield 37. The grounding busbar 38A electrically connects the GND pattern 142A of the control board 14A and the electromagnetic shield 37. Similar to Embodiment 1, the grounding busbar 38A is mounted to the control board 14A by a first screw 60b and to one of the two second tops 37b by a second screw 60a. The grounding busbar 38A can also be fixed by the same method as in Embodiments 2 and 3.

[0138] A grounding busbar 38B is provided between the control board 14B and the electromagnetic shield 37. The grounding busbar 38B electrically connects the GND pattern 142B of the control board 14B and the electromagnetic shield 37. Similar to Embodiment 1, the grounding busbar 38B is mounted to the control board 14B by a first screw 60b and to the other of the two second tops 37b by a second screw 60a. The grounding busbar 38B can also be fixed by the same method as in Embodiments 2 and 3.

[0139] Busbar unit 36A is positioned outside the control substrate 14A in the first orthogonal direction X. The busbar base 361A of busbar unit 36A is arranged parallel to the control substrate 14A. Busbar unit 36B is positioned outside the control substrate 14B in the first orthogonal direction X. The busbar base 361B of busbar unit 36B is arranged parallel to the control substrate 14B.

[0140] Figure 16 This is a view of the control board 14A as seen from the first orthogonal direction X. Additionally, in Figure 16 In the diagram, the first top part 37a and the second top part 37b of the electromagnetic shielding component 37 are indicated by double-dotted lines. Additionally, the second screw 60a is indicated by a dashed line, and the busbar unit 36A is indicated by a single-dotted line.

[0141] like Figure 16 As shown, when viewed from the first orthogonal direction X, busbar unit 36A is configured to overlap with control board 14A. The connection portion (i.e., the first screw 60b) between busbar unit 36A and grounding busbar 38A and control board 14A is configured separately in the first orthogonal direction X, and the connection portion (i.e., the second screw 60a) between busbar unit 36A and grounding busbar 38A and electromagnetic shield 37 is configured separately in the axial direction Z. Similarly, when viewed from the first orthogonal direction X, busbar unit 36B is configured to overlap with control board 14B. The connection portion between busbar unit 36B and grounding busbar 38B and control board 14B is configured separately in the first orthogonal direction X, and the connection portion between busbar unit 36B and electromagnetic shield 37 is configured separately in the axial direction Z. Therefore, it is possible to prevent the busbar units 36A and 36B from contacting the connection portions of the grounding busbars 38A and 38B and the control board 14A and 14B, as well as the connection portions of the grounding busbars 38A and 38B and the electromagnetic shield 37, while effectively arranging the busbar units 36A and 36B inside the electromagnetic shield 37.

[0142] In addition, Figure 16 In the example, screws 60a and 60b are configured such that the axis of the second screw 60a, the axis of the first screw 60b, and the axis O of the rotation shaft 21 are located on the same plane. Therefore, by using screws 60a and 60b, the control boards 14A and 14B can be fixed relative to the electromagnetic shielding member 37 at the center of the second orthogonal direction Y, thereby improving the vibration resistance and durability of the control boards 14A and 14B.

[0143] In addition, such as Figure 17 As shown, the connection portion between the grounding busbar 38A and the control board 14A (i.e., the first screw 60b), and the connection portion between the grounding busbar 38A and the electromagnetic shield 37 (i.e., the second screw 60a) can also be arranged at different positions in the second orthogonal direction Y. Similarly, the connection portion between the grounding busbar 38B and the control board 14B, and the connection portion between the grounding busbar 38B and the electromagnetic shield 37 can also be arranged at different positions in the second orthogonal direction Y. Even in this case, the connection portions between the busbar units 36A and 36B and the grounding busbars 38A and 38B and the control boards 14A and 14B, and the connection portion between the grounding busbars 38A and 38B and the electromagnetic shield 37 are arranged separately. Therefore, it is possible to prevent the busbar units 36A and 36B from contacting these connection portions. In addition, as described above, by adjusting the positions of the screws 60a and 60b, the degree of design freedom is increased. Therefore, the busbar units 36A and 36B can be configured more effectively inside the electromagnetic shield 37, and the increase in the size of the rotary motor device 107 can be suppressed.

[0144] Implementation method 9.

[0145] The rotary motor devices described in Embodiments 1 to 8 can be applied to electric power steering systems for vehicles. Hereinafter, [the following will be used...] Figure 18 The electric power steering device 150 according to Embodiment 9 will be described. Furthermore, structural elements having the same function and effect as those in Embodiment 1 will be assigned the same reference numerals and their descriptions will be omitted.

[0146] Figure 18 This is a schematic structural diagram of the electric power steering device 150 according to Embodiment 9. In the illustrated example, the electric power steering device 150 is a rack-and-pinion type electric power steering device. The electric power steering device 150 includes a rotary motor device 100, a steering wheel 151, a torque sensor 152, and a speed sensor 153.

[0147] When the driver operates the steering wheel 151, causing the vehicle's steering mechanism to generate steering torque, the torque sensor 152 detects this steering torque and outputs it to the rotary motor device 100. Additionally, the speed sensor 153 detects the vehicle's speed and outputs it to the rotary motor device 100. Based on the inputs from the torque sensor 152 and the speed sensor 153, the rotary motor device 100 generates an auxiliary torque to assist the steering torque and provides this auxiliary torque to the steering mechanism of the vehicle's front wheels 154. The torque sensor 152 and the speed sensor 153 are... Figure 1 It is part of sensor class 8. The rotating electric motor device 100 can also generate auxiliary torque based on information other than torque sensor 152 and speed sensor 153.

[0148] By miniaturizing the rotary motor unit 100 used in the electric power steering system 150, vehicle compatibility is improved. Reducing the cost of the rotary motor unit 100 also reduces the overall cost of the electric power steering system 150. The same applies when rotary motor units 101 to 107 are used instead of the rotary motor unit 100.

[0149] Furthermore, the technical scope of this disclosure is not limited to the described embodiments, and various modifications can be made without departing from the spirit of this disclosure.

[0150] For example, the rotary motor device 100 can be used for purposes other than the electric power steering device 150. Additionally, the above embodiments or variations can be appropriately combined.

[0151] Label Explanation

[0152] 1. Control Units 1A and 1B

[0153] 2 Rotary motor

[0154] Filter sections 17, 17A, and 17B

[0155] 17a Standard Mode Coil (Coil)

[0156] Capacitors 17b, 17c, and 17d

[0157] 21 Rotation axis

[0158] 34 Radiator

[0159] Busbar Units 36, 36A, and 36B

[0160] 37 Electromagnetic shielding components

[0161] 37a Top of 1

[0162] 37b Top 2

[0163] 38, 38A, 38B grounding busbars

[0164] 39 Fastened part

[0165] 40 Housing

[0166] 60a Screw 2

[0167] 60b First Screw

[0168] 61 Resin bracket (resin component)

[0169] Rotating electrical machinery 100, 101, 102, 103, 104, 105, 106, 107

[0170] 142, 142A, 142B GND patterns (wiring patterns)

[0171] 150 Electric Power Steering System

[0172] 361, 361A, 361B Busbar Base

[0173] 422, 422A, 422B Power supply connection terminals (external connection terminals)

[0174] O axis.

Claims

1. A rotary electric motor device, characterized in that, include: A rotary motor having a rotating shaft; A control unit, which is arranged side-by-side with the rotary motor in an axial direction along the axis of rotation and controls the rotary motor; and An electromagnetic shielding component that covers the control unit. The control unit has: A control substrate, extending along the axial direction and connected to external connection terminals; and A filter section that attenuates noise components propagating to the external connection terminal. The electromagnetic shielding component covers the entire control substrate and is formed in a cylindrical shape. The cylindrical shape includes a first top with a through hole for the external connection terminal to pass through, and a second top disposed on the side of the rotary motor that is closer to the first top than the first top. At least a portion of the filter section is mounted on the control substrate and is disposed axially between the first top and the second top.

2. The rotary electric motor device as described in claim 1, characterized in that, The filter section has a wiring pattern formed on the control substrate and electrically connected to the external connection terminal. The control unit has a grounding busbar that electrically connects the wiring pattern and the electromagnetic shielding.

3. The rotary motor device as described in claim 2, characterized in that, It also includes a heat sink, which is disposed inside the electromagnetic shield. The control unit has: The first screw secures the grounding busbar and the control board to the heat sink. as well as A resin component disposed between the grounding busbar and the first screw.

4. The rotary electric motor device as described in claim 3, characterized in that, Along the axis of the first screw, the resin component, the grounding busbar, the control board, and the heat sink are arranged sequentially toward the axis of rotation.

5. The rotary electric motor device according to any one of claims 2 to 4, characterized in that, The control unit has a second screw for fixing the grounding busbar to the second top.

6. The rotary electric motor device as described in claim 5, characterized in that, The control unit has a fastening part that is configured to sandwich the grounding busbar between itself and the second top, for fastening by the second screw.

7. The rotary electric motor device as described in claim 5 or 6, characterized in that, The grounding busbar and the second top are arranged side by side along the axial direction.

8. The rotary electric motor device as described in claim 2, characterized in that, The grounding busbar is joined to the wiring pattern by welding and is pressed into contact with the second top.

9. The rotary electric motor device as claimed in claim 8, characterized in that, The grounding busbar is pressed into contact with the second top through elastic deformation.

10. The rotary electric motor device according to any one of claims 1 to 7, characterized in that, The control unit has: grounding busbar; The first screw, which mounts the grounding busbar to the control board; and The second screw, which mounts the grounding busbar to the second top, The axis of the first screw and the axis of the second screw are arranged on the same plane, including the axis of the rotation shaft.

11. The rotary electric motor apparatus according to any one of claims 1 to 7, characterized in that, The control unit has: grounding busbar; The first screw, which mounts the grounding busbar to the control board; and The second screw, which mounts the grounding busbar to the second top, The axis of the second screw is disposed on a first plane including the axis of the rotation shaft, and the axis of the first screw is disposed on a second plane parallel to the first plane.

12. The rotary electric motor device as claimed in claim 10 or 11, characterized in that, The axis of the first screw is arranged perpendicularly to the control base plate, and the axis of the second screw is arranged perpendicularly to the second top.

13. The rotary electric motor device according to any one of claims 2 to 12, characterized in that, The control unit has a busbar base that is arranged parallel to the control board and on which a portion of the filter section is mounted. The base of the busbar is separated from the connection portion between the grounding busbar and the control board.

14. The rotary electric motor apparatus according to any one of claims 1 to 13, characterized in that, It also has a housing that houses the external connection terminals and covers the electromagnetic shielding.

15. The rotary electric motor apparatus according to any one of claims 1 to 14, characterized in that, The filter section includes a capacitor. The capacitor is mounted on the control substrate and is disposed axially between the first top and the second top.

16. The rotary electric motor device according to any one of claims 1 to 14, characterized in that, The filter section includes a capacitor and a coil. The capacitor and the coil are mounted on the control substrate and are arranged axially between the first top and the second top.

17. The rotary electric motor device as claimed in claim 15 or 16, characterized in that, The capacitor is configured such that its entirety is positioned closer to the first top side than the second top.

18. The rotary electric motor device as described in claim 15 or 16, characterized in that, The capacitor is configured such that the position of the side of the capacitor in the axial direction coincides with the position of the outer surface of the second top.

19. The rotary electric motor device as described in claim 15 or 16, characterized in that, The capacitor is configured to overlap the outer surface of the second top in the axial direction.

20. An electric power steering device, characterized in that, Includes the rotary electric motor device as described in any one of claims 1 to 19.

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