Electric drive control device

Abstract

Electric drive control device. According to an embodiment of the present invention, an electric drive control device for controlling an electric motor that generates a driving force includes: a first electronic control unit, which is arranged on a side opposite to the drive shaft of a motor housing that accommodates the electric motor, among two sides in the direction of the drive shaft of the electric motor, and is configured to control the electric motor; and a second electronic control unit, which is arranged opposite to the first electronic control unit in the direction of the drive shaft, and is configured to control the electric motor.

Description

Technical Field

[0001] The present invention relates to an electric drive control device, and more particularly, to an electric drive control device for controlling an electric motor that generates a driving force. Background Art

[0002] The packaging technology of an electronic control unit (ECU) that controls the rotation speed and rotation torque of the motor is being adopted in the electric power steering (EPS) system of the vehicle, etc. In this regard, in order to overcome the limitation of the installation space in the vehicle, it is necessary to improve the layout efficiency in the package and reduce the size of the package.

[0003] In particular, as the number of electrical systems in vehicles increases, redundant design is being used as a countermeasure in the trend of strengthening safety regulations (ISO26262) related to failure / safety. However, since two ECUs should be installed in a package in order to reflect the redundant design, it is increasingly necessary to further improve the layout efficiency in the package and reduce the size of the package.

[0004] In addition, in the above-mentioned redundant design, the same ECU is designed to be redundant. Since the two ECUs perform mutual monitoring and operate independently, each of the ECUs should have a unique identification (ID). However, the two ECUs designed to have a redundant design usually have the same hardware (H / W) structure. When a software (S / W) method such as boundary scanning is used to assign a unique ID to each of the ECUs having the same appearance and then perform an assembly process, it is difficult to distinguish the two ECUs, and as a result, confusion between them may occur, which may cause assembly failure. In addition, there is a problem that when the IDs of the two ECUs are identified using pull-up resistors and pull-down resistors in hardware, the IDs should be managed separately in a mass production line. Summary of the invention

[0005] The present invention aims to provide an electric drive control device which improves packaging arrangement efficiency and reduces packaging size by forming an electronic control unit integrally with an electric motor.

[0006] The present invention is also directed to an electric drive control device that effectively performs heat dissipation of an electronic control unit provided along a drive shaft of an electric motor.

[0007] The present invention also aims to provide an electric drive control device that is efficient in production and management.

[0008] According to one aspect of the present invention, there is provided an electric drive control device for controlling an electric motor that generates a driving force, the electric drive control device comprising: a first electronic control unit, which is arranged on a side opposite to the drive shaft of a motor housing that accommodates the electric motor, among two sides in the direction of the drive shaft of the electric motor, and is configured to control the electric motor; and a second electronic control unit, which is arranged opposite to the first electronic control unit in the direction of the drive shaft, and is configured to control the electric motor.

[0009] In this case, the electric drive control device may also include a heat dissipation component, which is arranged on the side opposite to the drive shaft of the motor housing on both sides in the direction of the drive shaft of the motor, and is configured to dissipate the heat generated in the first electronic control unit and the second electronic control unit.

[0010] The heat dissipation component may include: a first annular heat dissipation component, which is arranged to contact the end opposite to the drive shaft of the motor among the end portions on both sides of the motor housing; and a plate-shaped second heat dissipation component, which is arranged between the first electronic control unit and the second electronic control unit in the direction of the drive shaft and has one side connected to the first heat dissipation component.

[0011] The first heat dissipation member may be coupled to an end portion opposite to the driving shaft of the motor among end portions at both sides of the motor case.

[0012] The first electronic control unit and the second electronic control unit may each include a power circuit unit associated with the power supplied to the motor, and the second heat dissipation member may include a protrusion, which protrudes so that the power circuit unit of the first electronic control unit and the power circuit unit of the second electronic control unit are in contact with one side surface and another side surface of the second heat dissipation member that are in contact with the first electronic control unit and the second electronic control unit.

[0013] The protrusions may have a shape in which at least one portion thereof does not overlap each other when viewed in the vertical direction.

[0014] Each of the first electronic control unit and the second electronic control unit may be implemented on one circuit board.

[0015] The electric drive control device may also include a connecting plate, which is arranged on the end opposite to the drive shaft of the motor among the ends on both sides of the motor housing and is configured to connect the first electronic control unit and the second electronic control unit to the motor.

[0016] The connection board may include a first connection terminal and a second connection terminal, wherein the first connection terminal and the second connection terminal are connected to any one of the first electronic control unit and the second electronic control unit, and the first connection terminal and the second connection terminal may each have a unique identification (ID) assigned respectively by hardware.

[0017] The first electronic control unit and the second electronic control unit may be identified by a unique ID of the first connection terminal and a unique ID of the second connection terminal, respectively.

[0018] The connection plate may include a motor position sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present invention will become more apparent to those skilled in the art by describing in detail exemplary embodiments of the present invention with reference to the accompanying drawings, in which:

[0020] Figure 1 is a perspective view of an electric drive package including an electric drive control device according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Exploded stereogram of

[0022] Figure 3 yes Figure 1 A side view of the electric drive control device with the cover removed;

[0023] Figure 4 and Figure 5 are respectively a perspective view and a plan view of a first electronic control unit of an electric drive control device according to an embodiment of the present invention;

[0024] Figure 6 and Figure 7 are a side view and a plan view, respectively, of a heat dissipation member of an electric drive control device according to an embodiment of the present invention; and

[0025] Figure 8 2 is a plan view of a connection plate of an electric drive control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Hereinafter, embodiments of the present invention that can be easily performed by those skilled in the art will be described in detail with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Parts that are not related to the description are omitted in the accompanying drawings to clearly illustrate the present invention. Throughout this specification, the same reference numerals are used to represent the same or similar components.

[0027] It should also be understood that the terms “comprises,” “including,” “includes,” and / or “comprising,” when used in this specification, indicate the presence of the described features, integers, steps, operations, elements, parts, or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

[0028] Figure 1 is a perspective view of an electric drive package including an electric drive control device according to an embodiment of the present invention, Figure 2 yes Figure 1 , and Figure 3 yes Figure 1 Side view of the electric drive control unit with the cover removed.

[0029] Reference Figures 1 to 3 The electric drive control device 3 according to the embodiment of the present invention is a device for controlling the motor that generates the driving force, and is disposed on one side opposite to the drive shaft 11 of the motor among the two sides of the motor housing 1 that accommodates the motor. The electric drive control device 3 may be disposed along an axis A extending along the drive shaft 11. In addition, the electric drive control device 3 may include a first electronic control unit 31a, a second electronic control unit 31b, a heat dissipation member 33, a connection plate 35, and a cover 37.

[0030] In this case, the motor in the motor housing 1 may be applied to an electric power steering (EPS) system of a vehicle. Specifically, the motor may be used to generate a steering assist force corresponding to a steering angle detected from a driver's steering wheel manipulation and a torque.

[0031] The first electronic control unit 31a is provided on the side opposite to the drive shaft 11 among both sides of the motor housing 1 in the direction of the axis A, and controls the motor. Figure 4 and Figure 5 , the first electronic control unit 31a may include a power circuit unit 311a, a connection pin unit 313a, a connector unit 315a, a control circuit unit 317a and a screw hole 319a. In addition, the first electronic control unit 31a may be implemented on a circuit board. The circuit board may be a printed circuit board (PCB).

[0032] The power circuit unit 311a is a circuit associated with the power supplied to the motor, and converts the power supplied from the outside into power suitable for driving the motor. The power circuit unit 311a is a main heat generating unit of the first electronic control unit 31a, and at least one part thereof is arranged to contact the protrusion 3331 of the second heat dissipation member 333 so as to smoothly dissipate heat, as will be described below.

[0033] The connection pin unit 313a is an interface that enables the motor to be connected to the first electronic control unit 31a. Through the connection pin unit 313a, power supplied from the power circuit unit 311a is supplied to the motor, and sensing information related to the motor is transmitted to the first electronic control unit 31a.

[0034] The connector unit 315a is an interface that enables the first electronic control unit 31a to be connected to an external power source (not shown) and an external device (not shown). The connector unit 315a may include: a first connector 3151a for transmitting control information of the first electronic control unit 31a or sensing information related to the motor to the outside; and a second connector 3153a connected to the external power source.

[0035] The control circuit unit 317a is a portion for controlling the power circuit unit 311a, the connection pin unit 313a, the connector unit 315a, etc. The control circuit unit 317a has a relatively small calorific value compared to the power circuit unit 311a.

[0036] The screw hole 319a is a portion into which a screw S for coupling the first electronic control unit 31a to the heat dissipation member 33 is inserted. Of course, coupling between the first electronic control unit 31a and the heat dissipation member 33 may be performed in various ways other than the method using the screw S. Therefore, the screw hole 319a may not be provided.

[0037] The second electronic control unit 31b is a unit that is disposed opposite to the first electronic control unit 31a in the direction of the axis A to control the motor. The second electronic control unit 31b may have the same configuration as the first electronic control unit 31a, and the appearance of the second electronic control unit 31b may be the same as the appearance of the first electronic control unit 31a. In addition, like the first electronic control unit 31a, the second electronic control unit 31b may be implemented on one circuit board, and more specifically, on one PCB.

[0038] The second electronic control unit 31b can be used to control the motor together with the first electronic control unit 31a, can serve as a redundant unit of the first electronic control unit 31a and not operate during the operation of the first electronic control unit 31a, and can control the motor only when the first electronic control unit 31a cannot control the motor due to a malfunction, etc.

[0039] The heat dissipation member 33 is provided on the side opposite to the drive shaft 11 of the motor among both sides of the motor housing 1 in the axis A direction, and dissipates heat generated in the first electronic control unit 31a and the second electronic control unit 31b. Figure 6 and Figure 7 The heat dissipation member 33 may include a first heat dissipation member 331 and a second heat dissipation member 333 .

[0040] The first heat dissipation member 331 is an annular member arranged to contact the end opposite to the drive shaft 11 of the motor among the ends on both sides of the motor housing 1. The first heat dissipation member 331 can be connected to the end opposite to the drive shaft 11 of the motor among the ends on both sides of the motor housing. The first heat dissipation member 331 may include a screw hole 3311 formed on its outer peripheral surface, which is communicated with the screw hole 319a protruding from the end of the motor housing 1, and can be fastened with a screw in a state where the first heat dissipation member 331 is arranged on the end of the motor housing 1. In addition, as Figure 2 As shown in FIG. 1 , an O-ring 34 may be provided between the first heat radiating member 331 and the motor case 1 in order to ensure airtightness to prevent penetration of moisture, foreign matter, etc.

[0041] The second heat dissipation member 333 is a plate-shaped member that is disposed between the first electronic control unit 31a and the second electronic control unit 31b along the axis A and has one side connected to the first heat dissipation member 331. Heat generated in the first electronic control unit 31a and the second electronic control unit 31b is transferred to the first heat dissipation member 331 through the second heat dissipation member 333 and dissipated to the motor housing 1 or the outside. The second heat dissipation member 333 may include a protrusion 3331, a non-protrusion 3333, and a screw hole 3335.

[0042] The protrusion 3331 is a portion that protrudes so that at least a portion of the power circuit unit 311a of the first electronic control unit 31a and at least a portion of the power circuit unit of the second electronic control unit 31b are in contact with one side surface and the other side surface of the second heat dissipation member 333 that are in contact with the first electronic control unit 31a and the second electronic control unit 31b, respectively. The protrusion 3331 enables a relatively large amount of heat in the power circuit unit 311a of the first electronic control unit 31a and the power circuit unit of the second electronic control unit 31b to be smoothly conducted through direct contact.

[0043] The protrusions 3331 formed on one side surface and the other side surface of the second heat dissipation member 333 may be formed in an offset form rather than overlapping each other in the vertical direction. That is, in one embodiment of the present invention, when viewed in the vertical direction, the protrusions 3331 formed on one side surface and the other side surface of the second heat dissipation member 333 have a shape in which at least one portion thereof does not overlap each other. With this structure, the heat dissipation area can be widened, so that heat dissipation can be performed more effectively.

[0044] The non-protrusion 3333 is a portion formed on one side surface and the other side surface of the second heat dissipation member 333 at the periphery of the protrusion 3331 at a relatively lower height than the protrusion 3331. The non-protrusion 3333 forms a space that can be cooled by air between the first electronic control unit 31a, the second electronic control unit 31b, and the second heat dissipation member 333.

[0045] The screw hole 3335 is a portion that communicates with the screw hole 319a of the first electronic control unit 31a and the screw hole of the second electronic control unit 31b when the first electronic control unit 31a and the second electronic control unit 31b are provided. The screw hole 3335 enables the first electronic control unit 31a and the second electronic control unit 31b to be connected to the heat dissipation member 33 by screws (not shown).

[0046] Furthermore, the first heat dissipation member 331 and the second heat dissipation member 333 may be integrally formed and may be made of an aluminum alloy material ADC12 or the like which is advantageous in terms of mechanical properties and thermal conductivity.

[0047] The connection plate 35 is a portion that is provided at an end opposite to the drive shaft 11 of the motor among the ends on both sides of the motor housing 1 and connects the first electronic control unit 31a and the second electronic control unit 31b to the motor. Figure 8 , the connecting board 35 may be made into a circuit board and the circuit board may be a PCB.

[0048] In addition, the connecting plate 35 can be configured so that one surface thereof contacts the end surface of one side of the motor housing 1 in a form perpendicular to the first electronic control unit 31a and the second electronic control unit 31b, and can include a first connecting terminal 351, a first resistor 352, a second connecting terminal 353, a second resistor 354, a motor position sensor 355 and a screw hole 356.

[0049] Each of the first connection terminal 351 and the second connection terminal 353 is a portion connected to any one of the first electronic control unit 31a and the second electronic control unit 31b. Each of the first connection terminal 351 and the second connection terminal 353 may be formed as a slot connected to one of the connection pin units 313a of the first electronic control unit 31a and the connection pin units of the second electronic control unit 31b. In this case, the first connection terminal 351 and the second connection terminal 353 may each have a unique identification (ID) assigned respectively with hardware.

[0050] When a unique ID is assigned to each of the first connection terminal 351 and the second connection terminal 353, the first electronic control unit 31a and the second electronic control unit 31b implemented as the same PCB cannot be identified by software installed in the first electronic control unit 31a or the second electronic control unit 31b, but can be identified by hardware by determining which of the first connection terminal 351 and the second connection terminal 353 they are connected to.

[0051] For example, even when the first electronic control unit 31a and the second electronic control unit 31b are implemented as the same PCB and thus the first electronic control unit 31a and the second electronic control unit 31b cannot be distinguished from each other in appearance, the first electronic control unit 31a can be connected to the first connection terminal 351, and the second electronic control unit 31b can be connected to the second connection terminal 353. In this way, the first electronic control unit 31a and the second electronic control unit 31b can be identified on the connection board 35 in hardware, so that the first electronic control unit 31a and the second electronic control unit 31b do not need to be identified and managed separately in the manufacturing process, and assembly failure due to confusion can be prevented.

[0052] The first resistor 352 and the second resistor 354 are used to identify the first connection terminal 351 and the second connection terminal 353 in appearance, and any one of the first resistor 352 and the second resistor 354 can be a pull-up resistor, and the other can be a pull-down resistor. Therefore, the first connection terminal 351 and the second connection terminal 353 can be identified by appearance.

[0053] The motor position sensor 355 senses the position of a rotor of the electric motor provided in the motor housing 1 and transmits information on the position to the first electronic control unit 31 a and the second electronic control unit 31 b .

[0054] The screw hole 356 is a hole for inserting a screw for fixing the connection plate 35 to the end surface of the motor housing 1. Depending on the fastening method between the connection plate 35 and the motor housing 1, the screw hole 356 may be omitted or deformed.

[0055] The cover 37 may be a portion for protecting the electric drive control device 3 from external foreign matter and the like, and may be formed in a cylindrical shape having one open side, such as Figure 1 and Figure 2 A through hole through which the connector unit 315a of the first electronic control unit 31a and the connector unit of the second electronic control unit 31b can pass and a vent hole for air inflow and outflow may be formed on the other side that is not open, and the cover 37 may include a dust filter D covering the vent hole or the like.

[0056] According to the present invention, the following effects can be provided by the above-mentioned configuration.

[0057] According to the present invention, it is possible to provide an electric drive control device that improves layout efficiency in a package and reduces the package size by forming an electronic control unit integrally with a motor.

[0058] According to the present invention, it is possible to provide an electric drive control device that effectively performs heat dissipation of an electronic control unit provided along a drive shaft of a motor by a heat dissipation member provided along the drive shaft of the motor.

[0059] According to the present invention, it is possible to provide an electric drive control device in which a unique ID is assigned to a connection terminal of a connection board in hardware so that efficiency of production and management is ensured when two electronic control units are installed.

[0060] Although the present invention has been described with reference to the exemplary embodiments of the present invention, the spirit of the present invention is not limited to the embodiments proposed in this specification. Those skilled in the art who understand the spirit of the present invention can easily propose other embodiments by adding, changing or deleting elements within the scope of the same concept, and these other embodiments are also within the spirit of the present invention.

[0061] CROSS-REFERENCE TO RELATED APPLICATIONS

[0062] This application claims priority to and the benefit of Korean Patent Application No. 10-2018-0055480, filed on May 15, 2018, the disclosure of which is hereby incorporated by reference in its entirety.

Claims

1. An electric drive control device for controlling an electric motor that generates a driving force, the electric drive control device comprising: a first electronic control unit disposed on a side opposite to the drive shaft of a motor housing accommodating the motor, of both sides in a direction of a drive shaft of the motor, and configured to control the motor; as well as a second electronic control unit, which is disposed opposite to the first electronic control unit in the direction of the drive shaft and is configured to control the electric motor, The electric drive control device further includes a heat dissipation member, which is disposed on one side of the motor housing opposite to the drive shaft of the motor and configured to dissipate heat generated in the first electronic control unit and the second electronic control unit. Wherein, the heat dissipation component comprises: an annular first heat dissipation member disposed to contact an end portion opposite to the drive shaft of the electric motor among end portions on both sides of the motor housing; and A plate-shaped second heat radiating member is provided between the first electronic control unit and the second electronic control unit in the direction of the drive shaft and has one side connected to the first heat radiating member.

2. The electric drive control device according to claim 1, wherein: The first heat radiating member is coupled to an end portion opposite to the driving shaft of the electric motor among end portions on both sides of the motor case.

3. The electric drive control device according to claim 1, wherein: The first electronic control unit and the second electronic control unit each include a power supply circuit unit associated with power supplied to the electric motor, and The second heat dissipating member includes a protruding portion protruding so that the power circuit unit of the first electronic control unit and the power circuit unit of the second electronic control unit contact one side surface and the other side surface of the second heat dissipating member contacting the first electronic control unit and the second electronic control unit.

4. The electric drive control device according to claim 3, wherein: When viewed in the vertical direction, the protrusions have a shape in which at least one portion thereof does not overlap each other.

5. The electric drive control device according to claim 1, wherein: Each of the first electronic control unit and the second electronic control unit is implemented on a circuit board.

6. The electric drive control device according to claim 5 further includes a connecting plate, which is arranged on the end opposite to the drive shaft of the motor among the ends on both sides of the motor housing, and is configured to connect the first electronic control unit and the second electronic control unit to the motor.

7. The electric drive control device according to claim 6, wherein: The connection plate includes a first connection terminal and a second connection terminal, the first connection terminal and the second connection terminal are connected to any one of the first electronic control unit and the second electronic control unit, and The first connection terminal and the second connection terminal each have a unique identification ID assigned by hardware.

8. The electric drive control device according to claim 7, wherein: The first electronic control unit and the second electronic control unit are identified by the unique ID of the first connection terminal and the unique ID of the second connection terminal, respectively.

9. The electric drive control device according to claim 7, wherein: The connecting plate includes a motor position sensor.

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