Motor control device

Abstract

The present invention discloses a motor control device. The motor control device of one embodiment of the present invention includes: a first electronic control unit, including a first substrate and a first connector, and performing motor control, wherein the first connector has a first identification component and is combined with the first substrate; a second electronic control unit, including a second substrate and a second connector, and performing motor control, wherein the second connector has a second identification component different from the first identification component and is combined with the second substrate; a first heat dissipation component, formed in a plate shape, combined with the first electronic control unit on one side and combined with the second electronic control unit on the other side, and having a first interference component, the first interference component is formed at a position that does not interfere with the first identification component but interferes with the second identification component to prevent the second electronic control unit from being combined on the one side.

Description

Technical Field

[0001] The present invention relates to a motor control device, and more particularly, to a motor control device that is arranged on one side of a motor to control the driving of the motor. Background Art

[0002] In the vehicle's electric power steering (EPS) system, etc., an electronic control unit (ECU) that controls the rotation speed and torque of the motor is configured separately from the vehicle's main ECU. Recently, packaging technology that integrates such an ECU with the motor has been used.

[0003] In addition, with the increase in vehicle electrical systems and the strengthening of safety regulations (ISO26262) related to failure / safety, redundancy design is being adopted as a countermeasure. In order to apply redundancy to the control of the motor, an additional electronic control unit is required. This means configuring two electronic control units in the package.

[0004] On the other hand, according to the redundant design, when two electronic control units are used to control the motor, each electronic control unit should be set at a predetermined position in consideration of the connection with the wiring harness. However, since the shapes of the substrates and connectors of each electronic control unit are very similar, there is a possibility that the connection positions of each electronic control unit are interchanged. If the connection positions of each electronic control unit are reversed, the wiring harness and the electronic control unit will not match each other, resulting in motor control problems.

[0005] Based on this, a technology to prevent incorrect assembly is being developed so that the two electronic control units in the motor control device can be combined at pre-set positions. At the same time, ensuring space efficiency and reducing the package size in the packaging of the motor and electronic control unit are also becoming important technical issues.

[0006] (Prior art literature)

[0007] (Patent Document)

[0008] Authorized patent 10-0737135 "Electronic control unit for motor drive of vehicle" announced on July 2, 2007 Summary of the invention

[0009] (Problem to be solved)

[0010] The present invention is used to solve the above-mentioned prior art problems. An object of the present invention is to provide a motor control device having a structure for preventing incorrect assembly so that two electronic control units can be respectively combined at preset positions.

[0011] In addition, another object of the present invention is to provide a motor control device that has high space efficiency and can minimize the package size.

[0012] (Methods of solving the problem)

[0013] According to one aspect of the present invention, there is provided a motor control device, comprising: a first electronic control unit, comprising a first substrate and a first connector, and performing motor control, wherein the first connector has a first identification component and is coupled to the first substrate; a second electronic control unit, comprising a second substrate and a second connector, and performing motor control, wherein the second connector has a second identification component different from the first identification component and is coupled to the second substrate; a first heat dissipation component, formed in a plate shape, coupled to the first electronic control unit on one side and to the second electronic control unit on the other side, and having a first interference component, the first interference component being formed at a position that does not interfere with the first identification component but interferes with the second identification component to prevent the second electronic control unit from being coupled to the one side.

[0014] In this case, the first identification member may be composed of a protrusion protruding toward one side of the first heat dissipation member, and the first interference member may be composed of a protrusion formed on one side of the first heat dissipation member.

[0015] In addition, the first identification member and the first interference member may be arranged side by side and adjacent to each other in a state where the first electronic control unit is coupled to one surface of the first heat dissipation member.

[0016] In addition, the first heat dissipation component may further include a second interference component formed at a position that does not interfere with the second identification component but interferes with the first identification component to prevent the first electronic control unit from being coupled to the other surface.

[0017] In addition, the second identification member may be composed of a protrusion protruding toward the other surface of the first heat dissipation member, and the second interference member may be composed of a protrusion formed on the other surface of the first heat dissipation member.

[0018] In addition, the second identification member and the second interference member may be arranged side by side and adjacent to each other in a state where the second electronic control unit is coupled to the other surface of the first heat dissipation member.

[0019] In addition, the first heat dissipating member may be arranged on the opposite side of the output shaft of the motor along an axis extending in the longitudinal direction of the motor.

[0020] In addition, one end of the first substrate and one end of the second substrate are arranged adjacent to the end on the opposite side of the output shaft of the motor; the first connector can be connected to the other end of the first substrate, and the second connector is connected to the other end of the second substrate.

[0021] In addition, the motor control device of the present invention may further include a second heat sink member that is coupled to an end portion on the opposite side of the output shaft of the motor and is connected to the first heat sink member.

[0022] In addition, the second heat dissipation member may be formed in a ring shape.

[0023] In addition, the first substrate includes a first power circuit, the second substrate includes a second power circuit, and the first heat dissipation component may include: a first contact portion protruding from a surface in contact with the first substrate to contact the first power circuit; and a second contact portion protruding from another surface in contact with the second substrate to contact the second power circuit.

[0024] In addition, when viewed from a vertical direction, the first contact portion and the second contact portion may be formed in a shape in which at least a portion does not overlap.

[0025] (Effects of the Invention)

[0026] According to an embodiment of the present invention, assembly errors of the electronic control unit can be effectively prevented by providing an identification component on the electronic control unit and an interference component on the heat dissipation component.

[0027] According to an embodiment of the present invention, each structure of the motor control device is arranged on the opposite side of the output shaft of the motor with the axis extending in the longitudinal direction of the motor, thereby ensuring space efficiency and minimizing the size of the package. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a perspective view of a state where a cover is separated in a motor package including a motor control device according to an embodiment of the present invention.

[0029] Figure 2 and Figure 3 The present invention is a perspective view showing a state where a first electronic control unit and a second electronic control unit are separated from each other in a motor control device according to an embodiment of the present invention at different angles.

[0030] Figure 4 It is an exploded perspective view of a first electronic control unit of a motor control device according to an embodiment of the present invention.

[0031] Figure 5 It is an exploded perspective view of a second electronic control unit of a motor control device according to an embodiment of the present invention.

[0032] Figure 6 This is an enlarged view showing a first identification component and a second identification component of a motor control device according to an embodiment of the present invention.

[0033] Figure 7 It is a perspective view showing a combined state of a first electronic control unit and a first heat sink in a motor control device according to an embodiment of the present invention.

[0034] Figure 8 The diagram shows a normal connection state and an assembly error state between a first electronic control unit and a first heat sink in a motor control device according to an embodiment of the present invention.

[0035] Fig. 9 It is a perspective view showing a coupled state of a second electronic control unit and a first heat sink in a motor control device according to an embodiment of the present invention.

[0036] (Explanation of Reference Numerals)

[0037] 1: Motor

[0038] 3: Motor control device

[0039] 31: First electronic control unit

[0040] 32: Second electronic control unit

[0041] 33: First heat dissipation component

[0042] 34: Second heat dissipation component

[0043] 35: Cover DETAILED DESCRIPTION

[0044] The embodiments of the present invention are described in detail below with reference to the accompanying drawings so that a person having ordinary knowledge in the technical field to which the present invention belongs can easily implement the present invention. The present invention can be implemented in various forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted in the accompanying drawings, and the same reference numerals are given to the same or similar components throughout the specification.

[0045] In this specification, terms such as "including" or "having" should be understood to specify the existence of features, numbers, steps, actions, components, parts or these combinations recorded in the specification, and do not exclude in advance the existence or additional possibilities of one or more other features, numbers, steps, actions, components, parts or these combinations.

[0046] Figure 1 This is a perspective view of a state where a cover is separated in a motor package including a motor control device according to an embodiment of the present invention. Figure 2 and Figure 3 The present invention is a perspective view showing a state where a first electronic control unit and a second electronic control unit are separated from each other in a motor control device according to an embodiment of the present invention at different angles.

[0047] The motor control device 3 of one embodiment of the present invention is a device for controlling the motor 1. More specifically, the motor control device of one embodiment of the present invention can control one or more of the rotation speed and torque of the motor 1. In this case, the motor 1 can be applied to the electric power steering (EPS) of the vehicle. That is, the motor 1 can generate a steering assist force corresponding to one or more of the steering angle and torque detected according to the steering wheel operation of the driver.

[0048] Reference Figure 1 The motor control device 3 of one embodiment of the present invention can be arranged on the opposite side of the output shaft 11 of the motor 1 along the axis A extending in the length direction of the motor 1. That is, the motor control device 3 of one embodiment of the present invention can be connected to the motor 1 and arranged on the opposite side of the output shaft 11 in the middle of both sides of the motor housing 12.

[0049] Reference Figures 1 to 3 The motor control device 3 according to an embodiment of the present invention includes a first electronic control unit 31 , a second electronic control unit 32 , a first heat dissipation component 33 , a second heat dissipation component 34 and a cover 35 .

[0050] The first electronic control unit 31 receives power and signals transmitted from the outside to control the motor 1. Here, the outside may be a main sub-control unit of the vehicle. In addition, in the case where the motor 1 is composed of a double winding, it can be considered that the connection between the first electronic control unit 31 and one of the double windings is responsible for half of the output of the motor 1.

[0051] Reference Figure 4 In one embodiment of the present invention, the first electronic control unit 31 includes a first substrate 311 and a first connector 312 .

[0052] The first substrate 311 may be formed of a PCB (Printed Circuit Board). One end of the first substrate 311 is disposed adjacent to the end on the opposite side of the output shaft 11 of the motor 1, and the other end is connected to the first connector 312.

[0053] In one embodiment of the present invention, a first slot 3111 is formed at the other end of the first substrate 311 combined with the first connector 312, so that the first identification component 3121 of the first connector 312 can protrude toward one side of the first substrate 311. That is, the first identification component 3121 of the first connector 312 can protrude toward one side of the first heat dissipation component 33 through the first slot 3111 of the first substrate 311.

[0054] Various circuit elements for controlling the motor 1 are disposed on the first substrate 311. In more detail, the first substrate 311 may include a first power circuit 3112 and a first control circuit (not shown).

[0055] The first power circuit 3112 is composed of one or more power elements and is disposed on the first substrate 311. The first power circuit 3112 converts power supplied from the outside through the first connector 312 into power suitable for driving the motor 1.

[0056] The first power circuit 3112 may include a first power terminal connected to the first busbar 13 of the motor 1. At this time, the first busbar 13 may be a terminal connected to the first winding of the double winding of the motor 1.

[0057] The first power circuit 3112 is a main heat generating part in the first electronic control unit 31. Accordingly, the first power circuit is a main target for heat dissipation through the first heat dissipation member 33 as described below.

[0058] The first control circuit is composed of one or more control elements and is disposed on the first substrate 311. The first control circuit controls the first power circuit and the like based on a signal supplied from the outside through the first connector 312, thereby controlling the motor 1.

[0059] The first control circuit generates relatively less heat than the first power circuit 3112. Accordingly, as described below, the first control circuit may not be in direct contact with the first heat dissipation component 33.

[0060] The first connector 312 has a first identification component 3121 and is combined with the first substrate 311. In one embodiment of the present invention, the first connector 312 is connected to the first wiring harness of the vehicle. That is, the first connector 312, as a structure for implementing the first electronic control unit 31, has a key code specification that is distinguished from the second connector 322.

[0061] In one embodiment of the present invention, the first identification component 3121 is formed by a protrusion protruding toward one side of the first heat dissipation component 33. More specifically, the first identification component 3121 is formed by a protrusion protruding toward one side of the first substrate 311 through a first slot 3111 formed at the other end of the first substrate 311.

[0062] On the other hand, the first connector 312 includes a first input connector 312a and a first output connector 312b. The first input connector 312a transmits external power and signals to the first substrate 311, and the first output connector 312b can transmit one or more of position sensing information and torque information of the motor to the outside.

[0063] The second electronic control unit 32 receives power and signals transmitted from the outside to control the motor 1. Here, the outside may be the main electronic control unit of the vehicle. In addition, in the case where the motor 1 is composed of a double winding, it can be considered that the connection between the second electronic control unit 32 and the other winding of the double winding that is not connected to the first electronic control unit 31 is responsible for half of the output of the motor 1.

[0064] Reference Figure 5 In one embodiment of the present invention, the second electronic control unit 32 includes a second substrate 321 and a second connector 322 .

[0065] The second substrate 321 may be formed of a PCB (Printed Circuit Board). One end of the second substrate 321 is disposed adjacent to the end on the opposite side of the output shaft 11 of the motor 1 , and the other end is connected to the second connector 322 .

[0066] In one embodiment of the present invention, a second slot 3211 is formed at the other end of the second substrate 321 coupled to the second connector 322, so that the second identification component 3221 of the second connector 322 can protrude toward one side of the second substrate 321. That is, the second identification component 3221 of the second connector 322 protrudes toward the other side of the first heat dissipation component 33 through the second slot 3211 of the second substrate 321.

[0067] Various circuit elements for controlling the motor 1 are arranged on the second substrate 321. In more detail, the second substrate 321 may include a second power circuit 3212 and a second control circuit (not shown).

[0068] The second power circuit 3212 is composed of one or more power elements and is disposed on the second substrate 321. The second power circuit converts power supplied from the outside into power suitable for driving the motor 1 through the second connector 322.

[0069] The second power circuit 3212 may include a second power terminal connected to the second busbar 14 of the motor 1. At this time, the second busbar 14 may be a terminal connected to the second winding of the double winding of the motor 1.

[0070] The second power circuit 3212 is a main heat generating part in the second electronic control unit 32. Accordingly, the second power circuit 3212 is the main target of heat dissipation by the first heat dissipation member 33, similarly to the first power circuit 3112.

[0071] The second control circuit is composed of one or more control elements and is disposed on the second substrate 321. The second control circuit controls the second power circuit and the like based on a signal supplied from the outside through the second connector 322, thereby controlling the motor 1.

[0072] The second control circuit generates relatively less heat than the second power circuit 3212. Accordingly, the second control circuit may not be in direct contact with the first heat dissipation component 33.

[0073] The second connector 322 has a second identification component 3221 different from the first identification component 3121, and is combined with the second substrate 321. In one embodiment of the present invention, the second connector 322 is connected to the second wiring harness of the vehicle. That is, the second connector 322, as a structure for implementing the second electronic control unit 32, has a key code specification that is distinguished from the first connector 312.

[0074] In one embodiment of the present invention, the second identification component 3221 is formed by a protrusion protruding toward the other side of the first heat dissipation component 33. More specifically, the second identification component 3221 is formed by a protrusion protruding toward one side of the second substrate 321 through a second slot 3211 formed at the other end of the second substrate 321.

[0075] Reference Figure 6 In one embodiment of the present invention, it can be confirmed that the second identification component 3221 has the same shape as the first identification component 3121, but has a different position. That is, in one embodiment of the present invention, the second identification component 3221 is different from the first identification component 3121 in the position of formation on the connector.

[0076] On the other hand, the second connector 322 includes a second input connector 322a and a second output connector 322b. The second input connector 322a transmits external power and signals to the second substrate 321, and the second output connector 322b can transmit one or more of the position sensing information and torque information of the motor to the outside.

[0077] The first heat dissipation component 33 is a plate-shaped component that performs heat dissipation of the first electronic control unit 31 and the second electronic control unit 32. In one embodiment of the present invention, the first electronic control unit 31 is coupled to one surface of the first heat dissipation component 33, and the second electronic control unit 32 is coupled to the other surface.

[0078] More specifically, one or more screw fastening portions 331a and 331b are formed on one side and the other side of the first heat dissipation component 33, respectively, and the first substrate 311 and the second substrate 321 can be fastened by screws S. The screw fastening portions 331a and 331b can be formed to protrude at the same height as or lower than the first contact portion 333a and the second contact portion 333b described later.

[0079] The first heat dissipation component 33 has a first interference component 332a, which is formed at a position that does not interfere with the first identification component 3121 but interferes with the second identification component 3221 to prevent the second electronic control unit 32 from being combined on one side. In one embodiment of the present invention, the first interference component 332a is formed by a protrusion formed on one side of the first heat dissipation component 33.

[0080] exist Figure 7 The figure shows the combination state of the first electronic control unit and the first heat sink in the motor control device according to one embodiment of the present invention. In order to clearly show the combination state of the first electronic control unit 31 and the first heat sink 33. Figure 7 A portion of the first substrate 311 is omitted.

[0081] Reference Figure 7 In one embodiment of the present invention, the first identification component 3121 and the first interference component 332a are arranged side by side in a state where the first electronic control unit 31 is combined with one side of the first heat dissipation component 33. In addition, the protrusion of the first interference component 332a may be lower than the height of the first contact portion 333a described later.

[0082] The first interference member 332a is formed at a position that does not interfere with the first identification member 3121 but interferes with the second identification member 3221. Figure 8 As shown, the first electronic control unit 31 can be combined with one side of the first heat dissipation component 33, but the second electronic control unit 32 cannot be combined with one side of the first heat dissipation component 33. Accordingly, assembly errors are prevented.

[0083] In addition, the first heat dissipation component 33 further has a second interference component 332b, which is formed at a position that does not interfere with the second identification component 3221 but interferes with the first identification component 3121, so as to prevent the first electronic control unit 31 from being combined on the other side. In one embodiment of the present invention, the second interference component 332b is composed of a protrusion formed on the other side of the first heat dissipation component 33.

[0084] exist Fig. 9FIG. 2 shows the combination state of the second electronic control unit and the first heat sink in the motor control device of one embodiment of the present invention. In order to clearly show the combination state of the second electronic control unit 32 and the first heat sink 33, Fig. 9 A portion of the second substrate 321 is omitted.

[0085] Reference Fig. 9 In one embodiment of the present invention, the second identification component 3221 and the second interference component 332b are arranged side by side in a state where the second electronic control unit 32 is combined with the other surface of the first heat dissipation component 33. In addition, the protrusion of the second interference component 332b is lower than the height of the second contact portion 333b described later.

[0086] The second interference part 332b is formed at a position that does not interfere with the second identification part 3221 but interferes with the first identification part 3121. Figure 8 For the same reason as described above, the second electronic control unit 32 can be combined with the other side of the first heat dissipation component 33 , but the first electronic control unit 31 cannot be combined with the other side of the first heat dissipation component 33 .

[0087] In one embodiment of the present invention, the first heat dissipation component 33 has: a first contact portion 333a protruding from a side in contact with the first substrate 311 to contact the first power circuit 3112; and a second contact portion 333b protruding from the other side in contact with the second substrate 321 to contact the second power circuit 3212.

[0088] As described above, the first power circuit 3112 and the second power circuit 3212 are the main heat sources of the first electronic control unit 31 and the second electronic control unit 32. The first contact portion 333a and the second contact portion 333b directly contact the first power circuit 3112 and the second power circuit 3212 that generate relatively more heat to facilitate heat dissipation.

[0089] Reference Figure 2 and Figure 3 When viewed in a vertical direction, the first contact portion 333a and the second contact portion 333b form a shape in which at least a portion does not overlap. With such a structure, the heat dissipation area is dispersed, and the heat dissipation efficiency can be improved.

[0090] The second heat dissipation member 34 is disposed in contact with the end portion on the opposite side of the output shaft 11 of the motor 1 and is a member connected to the first heat dissipation member 33. In one embodiment of the present invention, the second heat dissipation member 34 is formed in a ring shape. In addition, the first heat dissipation member 33 is connected to the inner circumference of the second heat dissipation member 34. Accordingly, the heat transferred through the first heat dissipation member 33 can be discharged to the outside through the second heat dissipation member 34.

[0091] In one embodiment of the present invention, the second heat dissipation member 34 is coupled to the end portion on the opposite side of the output shaft 11 on both sides of the motor housing 12. More specifically, the end portion of the motor housing 12 formed in a cylindrical shape has one or more screw holes, and the second heat dissipation member 34 has screw holes 341 at positions corresponding to the screw holes 121. Since the screws are inserted and fastened to the screw holes 341 of the second heat dissipation member 34 and the screw holes of the motor housing 12, the second heat dissipation member 34 can be coupled to the motor 1.

[0092] On the other hand, a sealing member may be disposed between the second heat sink 34 and the motor housing 12 to ensure sealing. For example, the sealing member may be an O-ring.

[0093] In one embodiment of the present invention, the first heat dissipation component 33 and the second heat dissipation component 34 may be formed as one body. In addition, the material thereof may be made of an aluminum alloy material which is advantageous in mechanical properties and thermal conductivity.

[0094] The cover 35 protects the first electronic control unit 31, the second electronic control unit 32, the first heat sink 33, etc. from external foreign matter, etc. In one embodiment of the present invention, the cover 35 is formed in a cylindrical shape connected to the motor housing 12, and one side in the length direction is open, and a first through portion 351a and a second through portion 351b are formed on the other side, which can penetrate the first connector 312 and the second connector 322.

[0095] On the other hand, in one embodiment of the present invention, the motor position sensing unit may be arranged in contact with the end portion on the opposite side of the output shaft 11 of the motor 1. The first electronic control unit 31 and the second electronic control unit 32 may be connected to the motor position sensing unit, and the first electronic control unit 31 and the second electronic control unit 32 receive sensing information from the motor position sensing unit and transmit the information to the outside through the first output connector 312b and the second output connector 322b, respectively.

[0096] An embodiment of the present invention has been described, but the concept of the present invention is not limited to the embodiment presented in this specification. Practitioners who understand the concept of the present invention can easily propose the present invention within the scope of the same concept by adding, changing, deleting, and adding components, and this also falls within the scope of the concept of the present invention.

Claims

1. A motor control device, comprising: a first electronic control unit including a first substrate and a first connector, and performing motor control, wherein the first connector has a first identification component and is coupled to the first substrate; a second electronic control unit including a second substrate and a second connector, and performing motor control, wherein the second connector has a second identification component different from the first identification component and is coupled to the second substrate; The first heat dissipation component is formed in a plate shape, combines the first substrate and the first connector on one side and combines the second substrate and the second connector on the other side, and has a first interference component, which is formed at a position that does not interfere with the first identification component but interferes with the second identification component to prevent the second electronic control unit from being combined on the one side.

2. The motor control device according to claim 1, characterized in that: The first identification member is composed of a protrusion protruding toward one side of the first heat dissipation member, and the first interference member is composed of a protrusion formed on one side of the first heat dissipation member.

3. The motor control device according to claim 2, characterized in that: The first identification member and the first interference member are arranged side by side and adjacent to each other in a state where the first electronic control unit is coupled to one surface of the first heat dissipation member.

4. The motor control device according to claim 1, characterized in that: The first heat dissipation component further has a second interference component formed at a position that does not interfere with the second identification component but interferes with the first identification component to prevent the first electronic control unit from being coupled to the other surface.

5. The motor control device according to claim 4, characterized in that: The second identification member is composed of a protrusion protruding toward the other surface of the first heat dissipation member, and the second interference member is composed of a protrusion formed on the other surface of the first heat dissipation member.

6. The motor control device according to claim 5, characterized in that: The second identification member and the second interference member are arranged side by side and adjacent to each other in a state where the second electronic control unit is coupled to the other surface of the first heat dissipation member.

7. The motor control device according to claim 1, characterized in that: The first heat dissipating member is arranged on the opposite side to the output shaft of the motor along an axis extending in the longitudinal direction of the motor.

8. The motor control device according to claim 7, characterized in that: One end of the first substrate and one end of the second substrate are arranged adjacent to the end portion on the opposite side of the output shaft of the motor; The first connector is coupled to the other end of the first substrate, and the second connector is coupled to the other end of the second substrate.

9. The motor control device according to claim 7, characterized in that: Also includes: The second heat sink is coupled to an end portion on the opposite side of the output shaft of the motor and is connected to the first heat sink.

10. The motor control device according to claim 9, characterized in that: The second heat dissipation member is formed in a ring shape.

11. The motor control device according to claim 1, characterized in that: The first substrate includes a first power circuit, and the second substrate includes a second power circuit; The first heat dissipation component comprises: a first contact portion protruding from a surface contacting the first substrate to contact the first power circuit; and a second contact portion protruding from another surface contacting the second substrate to contact the second power circuit.

12. The motor control device according to claim 11, characterized in that: When viewed from a vertical direction, the first contact portion and the second contact portion are formed in a shape in which at least a portion does not overlap.

Images