WO2020153635A1

WO2020153635A1 - Electric drive control device

Info

Publication number: WO2020153635A1
Application number: PCT/KR2020/000425
Authority: WO
Inventors: 김지환; 정준호
Original assignee: 주식회사 만도
Priority date: 2019-01-23
Filing date: 2020-01-09
Publication date: 2020-07-30
Also published as: KR20200091646A; KR102607264B1

Abstract

The present invention relates to an electric drive control device for controlling an electric motor that generates a driving force. To this end, an electric drive control device for controlling an electric motor that generates a driving force, according to the present invention, comprises: a first control unit arranged on one side of a motor housing in which the electric motor is accommodated, so as to control the electric motor; a second control unit which is arranged to face the first control unit, and which controls the electric motor together with the first control unit or independently of the first control unit; a heat dissipating unit for dissipating heat generated by the first control unit and the second control unit; and a sealing unit for preventing moisture from entering the space in which the first control unit and the second control unit are arranged.

Description

Electric drive control device

The present invention relates to an electric drive control device that performs control of an electric motor that generates a driving force.

In a vehicle's Electric Power Steering (EPS) system, a packaging technology that integrally configures an electronic control unit (ECU) that controls a rotational speed or rotational torque of an electric motor with an electric motor is adopted.

In particular, as the vehicle's electric vehicle system increases, the fail/safety-related safety regulations (ISO26262) are intensifying, and redundancy design is used as a countermeasure. Two electronic controls are mounted inside.

On the other hand, the above-described redundancy design is made of a dual design of the same electronic control unit, and the two electronic control units operate mutually and operate independently.

However, in the conventional electronic control unit, the space in which the two electronic control units are arranged communicates with each other so that foreign matter such as moisture flowing into one space moves to the other space, causing both electronic control units to fail. As a result, there is a problem that the purpose of redundancy design cannot be achieved.

Therefore, it is urgent to solve these problems.

The technical problem to be solved in the present invention is to provide an electric drive control device that is partitioned so that the space in which the two controllers are arranged is independent of each other while preventing moisture from entering the space in which the two controllers are arranged.

In addition, it is to provide an electric drive control device that does not change the size of the entire device even if a sealing portion for blocking the inflow of water is provided.

The electric drive control device according to the present invention for solving the above technical problem is an electric drive control device that performs control of an electric motor that generates a driving force, and is disposed on one side of a motor housing in which the electric motor is housed. A first control unit for controlling, and a second control unit that is disposed opposite to the first control unit and controls the electric motor together with the first control unit or independently of the first control unit, and the first control unit and the second control unit. It includes a heat dissipation unit that dissipates heat generated by the control unit and a sealing unit that blocks moisture from entering the space where the first control unit and the second control unit are disposed.

In this case, the sealing unit may divide the space in which the first control unit is disposed and the space in which the second control unit is disposed to be independent of each other.

In addition, the heat dissipation unit is disposed between the first control unit and the second control unit, and includes a plate-shaped first heat dissipation member that extends along the rotational axis direction of the electric motor, and the sealing unit surrounds the first heat dissipation member. It can be arranged along.

At this time, a first insertion groove extending along the rotational axis direction of the electric motor is formed on the side surface of the first heat dissipation member, and a second extension extending along the radial direction of the electric motor is formed on the front surface of the first heat dissipation member. An insertion groove is formed, and the sealing portion can be inserted into the first insertion groove and the second insertion groove.

In addition, a cover portion coupled along the rotational axis direction of the electric motor so as to surround the first control portion and the second control portion may be further included, and the sealing portion may be fixedly disposed along an inner circumferential surface of the cover portion.

At this time, the sealing portion is disposed along the direction of the rotation axis of the electric motor, the first sealing member is inserted into the first insertion groove, and the second sealing is disposed along the radial direction of the electric motor and inserted into the second insertion groove It may include a member.

In addition, protrusions may be formed in at least one of the first sealing member and the second sealing member in the same direction as the direction in which the first insertion groove or the second insertion groove is formed.

In addition, the cover portion may be manufactured by a double injection method so that the sealing portion is fixedly disposed on the inner circumferential surface of the cover portion.

Alternatively, an annular second heat dissipation member is provided at a rear surface of the first heat dissipation member disposed adjacent to the electric motor, and the sealing part is disposed along the circumference of the second heat dissipation member so as to be pressed by one end of the cover part. A third sealing member may be further included.

At this time, the cover portion may be formed with a first ventilation hole communicating the space in which the first control unit is disposed with the outside, and a second ventilation hole communicating with the exterior space in which the second control unit is disposed.

At this time, a filter member may be provided on the inner circumferential surfaces of the first ventilation hole and the second ventilation hole, respectively.

The electric drive control apparatus of the present invention having the above-described configuration prevents moisture from entering the space where the two control units are arranged, and at the same time, the space where the two control units are arranged is partitioned so as to be independent of each other, thereby preventing a control failure due to water inflow. At the same time, even if one control unit fails, it is possible to stably operate through the other control unit.

In addition, even if a sealing part is provided to block the inflow of moisture, there is no change in size of the entire device, so that independent waterproofing is possible within the same package.

1 is a perspective view showing an electric drive control device according to the present invention.

Figure 2 is a perspective view showing a state in which the cover portion of the electric drive control device according to the present invention is separated.

3 and 4 are views showing a control unit according to the present invention, FIG. 3 is a perspective view, and FIG. 4 is a front view.

5 is a perspective view showing a cover portion of the electric drive control device according to the present invention.

6 is a perspective view of a part of the electric drive control device according to the present invention, cut away.

7 is a perspective view showing a state in which the cover portion of the electric drive control apparatus according to the present invention is perspective.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily practice. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. In the drawings, parts not related to the description are omitted in order to clearly describe the present invention, and the same reference numerals are attached to the same or similar elements throughout the specification.

In this specification, the terms "include" or "have" are intended to indicate the presence of features, numbers, steps, actions, components, parts or combinations thereof described in the specification, but one or more other features. It should be understood that the presence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance. In addition, when a part such as a layer, film, region, plate, etc. is said to be "above" another part, this includes not only the case "directly above" the other part but also another part in the middle. Conversely, when a portion of a layer, film, region, plate, or the like is said to be “under” another portion, this includes not only the case “underneath” another portion, but also another portion in the middle.

1 is a perspective view showing an electric drive control device according to the present invention, FIG. 2 is a perspective view showing a state in which the cover portion of the electric drive control device according to the present invention is separated, and FIGS. 3 and 4 are according to the present invention 3 is a perspective view, FIG. 4 is a front view, FIG. 5 is a perspective view showing a cover portion of the electric drive control device according to the present invention, and FIG. 6 is a part of the electric drive control device according to the present invention It is a perspective view showing a cutaway, Figure 7 is a perspective view showing a state in which the cover portion of the electric drive control device according to the present invention.

The electric drive control apparatus according to the present invention relates to an electric drive control apparatus that performs control of an electric motor that generates a driving force.

Such an electric motor may be applied to an electric power steering (EPS) of a vehicle. Specifically, the aforementioned electric motor may serve to generate a steering assist force corresponding to the detected steering angle and torque according to the steering wheel operation of the driver.

1 to 4, a control unit 100 for controlling the electric motor is disposed on one side of the motor housing 10 in which the aforementioned electric motor is housed, and the control unit 100 is manufactured according to a redundancy design. It includes a first control unit 110 and a second control unit 120.

The first control unit 110 may be implemented on one circuit board, and one circuit board may be a printed circuit board (PCB) board.

Also, the second control unit 120 is disposed to face the first control unit 110 described above, and controls the electric motor together with the first control unit 110 or independently of the first control unit 110. As described above, the second control unit 120 may also be implemented on one circuit board, and one circuit board may be a PCB board. In addition, the second control unit 120 may perform a role of controlling the electric motor together with the first control unit 110, or as a redundancy of the first control unit 110, when the first control unit 110 is operated, it does not operate. While maintaining the state, the control function of the electric motor may be performed only when the first control unit 110 cannot perform the control function of the electric motor due to a failure or the like.

At this time, the electric drive control apparatus according to the present invention is provided with a heat dissipation unit 200 for dissipating heat generated by the first control unit 110 and the second control unit 120, and such heat dissipation unit 200 has mechanical properties And an aluminum alloy material such as ADC12, which is advantageous in thermal conductivity and the like.

In addition, a sealing unit 300 is provided to block moisture from entering the space where the first control unit 110 and the second control unit 120 are disposed, and the sealing unit 300 includes the first control unit 110 and the first control unit 110. 2 The first control unit 110 and the second control unit 120 are stably operated by preventing moisture such as moisture from entering the space where the control unit 120 is disposed.

In addition, the above-described sealing unit 300 is divided so that the space in which the first control unit 110 is disposed and the space in which the second control unit 120 is disposed are independent of each other. That is, the sealing unit 300 prevents moisture from entering the space where the first control unit 110 and the second control unit 120 are disposed, and at the same time, the first control unit 110 and the second control unit 120 are disposed. Since the spaces are partitioned so that they are independent from each other, the control unit 100 due to the inflow of moisture is prevented, and at the same time, even when one control unit 100 fails, stable operation is possible through the other control unit 100. Is done.

The heat dissipation unit 200 is disposed between the first control unit 110 and the second control unit 120, and includes a plate-shaped first heat dissipation member 210 that extends along the direction of the rotating shaft 20 of the electric motor. . Since the first heat dissipation member 210 is connected to the first control unit 110 and the second control unit 120, heat generated from the first control unit 110 and the second control unit 120 is transferred to the first heat dissipation member 210. It is transmitted and discharged to the motor housing 10 or the outside through the second heat dissipation member 220 to be described later.

The above-described sealing part 300 may be disposed along the circumference of the first heat dissipation member 210. That is, since the sealing portion 300 is disposed along the periphery of the plate-shaped first heat dissipation member 210 disposed between the first control unit 110 and the second control unit 120, the first control unit 110 is disposed In addition to preventing moisture from entering the space and the space in which the second control unit 120 is disposed, it is also possible to prevent moisture from moving into one space even if water is introduced into one space. Stable operation is possible.

At this time, a first insertion groove 211 is formed on the side surface of the first heat dissipation member 210 and extends along the direction of the rotating shaft 20 of the electric motor, and the radius of the electric motor is formed on the front surface of the first heat dissipation member 210. The second insertion groove 212 extending along the direction is formed, and the above-described sealing part 300 may be inserted into the first insertion groove 211 and the second insertion groove 212.

That is, by forming the first insertion groove 211 and the second insertion groove 212 on the side and front of the first heat dissipation member 210, respectively, so that the sealing portion 300 is inserted, the moisture blocking effect is improved. In addition, it is possible to prevent an increase in the volume of the entire device due to the sealing portion 300. That is, since there is no change in size of the entire device, independent waterproofing is possible within the same package.

In addition, as shown in Figure 5, the first control unit 110 and the second control unit 120 further includes a cover unit 130 that is coupled along the direction of the rotation axis 20 of the electric motor, and described above The sealing portion 300 may be configured to be fixedly disposed along the inner circumferential surface of the cover portion 130.

As described above, when the sealing part 300 is fixedly arranged on the inner circumferential surface of the cover part 130, it is not necessary to separately install the sealing part 300, thereby reducing the time required for installation.

At this time, when the coupling of the cover part 130 is completed, the sealing part 300 is configured to be inserted into the first insertion groove 211 and the second insertion groove 212.

The sealing part 300 is disposed along the direction of the rotating shaft 20 of the electric motor and is inserted into the first insertion groove 211, the first sealing member 310, and is disposed along the radial direction of the electric motor to insert the second The second sealing member 320 may be inserted into the groove 212.

That is, the formation direction of the first insertion groove 211 formed on the side surface of the first heat dissipation member 210, the coupling direction of the cover portion 130, and the first sealing member 310 fixed to the inner circumferential surface of the cover portion 130 ) Is arranged in the same direction as the rotating shaft 20 of the electric motor. With this configuration, the first sealing member 310 can be installed while moving in a sliding manner along the first insertion groove 211 in the process of coupling the cover part 130, and since these directions are formed in the same way, the cover part ( 130) In the bonding process, the first sealing member 310 is stably installed without deformation, thereby effectively blocking moisture inflow.

In addition, as shown in FIG. 6, at least one of the first sealing member 310 and the second sealing member 320 is formed in a direction in which the first insertion groove 211 or the second insertion groove 212 is formed.

Protrusions

311 and 321 may be formed in the same direction as.

That is, as described above, in the process of coupling the cover 130, the first sealing member 310 is installed while moving in a sliding manner along the first insertion groove 211, thereby causing the first sealing member 310 And the first insertion groove 211, the frictional resistance is generated at the contact portion, and when the frictional resistance is increased, the coupling of the cover 130 is not easy, and the first sealing member 310 is deformed. It is installed in a state, water may be introduced, and the reuse of the cover 130 may be impossible as the first sealing member 310 leaves the cover 130, but as described above, the first sealing When the protrusion 311 is formed on the member 310, the contact area of the portion where the first sealing member 310 and the first insertion groove 211 come into contact with each other is reduced, so that frictional resistance between them can be reduced.

In addition, when the direction of the protrusion 311 formed on the first sealing member 310 is formed in the same direction as the formation direction of the first insertion groove 211, it is possible to effectively block the inflow of moisture after the cover 130 is installed. .

Similarly, as illustrated in FIG. 6, protrusions 321 may be formed on the second sealing member 320. The protrusion 321 is formed to extend in the same direction as the formation direction of the second insertion groove 212, and may be protruded along the coupling direction of the cover portion 130. When the protrusion 321 is formed in this way, the front end of the protrusion 321 is deformed while coming into contact with the second insertion groove 212 when the cover part 130 is engaged, and the coupling of the cover part 130 in this state Upon completion, it effectively blocks moisture inflow. In addition, when the protrusion 321 is formed as described above, even if the second sealing member 320 is not sufficiently elastically deformed by the fastening force of the cover portion 130, the protrusion 321 is elastically deformed to effectively block moisture inflow.

In addition, the cover portion 130 may be manufactured by a double injection method so that the sealing portion 300 is integrally fixedly disposed on the inner circumferential surface of the cover portion 130. That is, after disposing the sealing portion 300 inside the injection mold of the cover portion 130, the cover portion 130 is injected, and if the sealing portion 300 is fastened without having to separately install the sealing portion 300, Since the sealing part 300 is also installed, the assembling property is improved.

An annular second heat dissipation member 220 is provided on the rear surface of the first heat dissipation member 210 disposed adjacent to the aforementioned electric motor. The rotating shaft 20 of the electric motor is disposed on one side of the motor housing 10, and the above-described second heat dissipation member 220 is disposed on the other side of the motor housing 10. The second heat dissipation member 220 is formed with a screw hole in communication with a screw hole formed in the motor housing 10 so that the second heat dissipation member 220 is placed in the motor housing 10 to be fastened through a screw. Can. In addition, between the second heat dissipation member 220 and the motor housing 10, an O-ring to prevent inflow of moisture such as moisture may be disposed.

The second heat dissipation member 220 may be integrally formed on the rear surface of the first heat dissipation member 210.

In this case, the sealing unit 300 may further include a third sealing member 330 disposed along the circumference of the second heat dissipation member 220. As described above, when the third sealing member 330 is installed along the periphery of the second heat dissipation member 220, the cover part 130 is coupled to the rotating shaft 20 of the electric motor along the direction of rotation. It is pressurized by one end, and through this, it is possible to effectively prevent moisture from entering.

In addition, the cover 130 includes a first ventilation hole 131 communicating the space in which the first control unit 110 is disposed with the outside, and a second communicating space in which the second control unit 120 is disposed with the outside. Ventilation holes 132 may be formed. That is, in the process of using the electric motor, heat is generated in the first control unit 110 and the second control unit 120, and the heat is discharged to the outside through the heat dissipation unit 200 described above, but remains undischarged. The air inside the space in which the first control unit 110 and the second control unit 120 are disposed may be heated by heat. As described above, when the air inside is heated, the pressure increases. As described above, when the first vent hole 131 and the second vent hole 132 are formed in the cover part 130, the heated air is discharged to the outside. As the first control unit 110 and the second control unit 120, the high-pressure state in the space in which it is disposed may be resolved, thereby causing the cover unit 130 to be damaged or the first control unit 110 and the second control unit ( The circuit provided in 120) can be prevented from being burned.

In addition, a filter member 131a is provided on the inner circumferential surfaces of the first ventilation hole 131 and the second ventilation hole 132 so that moisture from outside does not flow through the first ventilation hole 131 and the second ventilation hole 132. 132a) may be provided, respectively.

The

filter members

131a and 132a function to pass air inside the space in which the first control unit 110 and the second control unit 120 are disposed, and block moisture from passing outside. A membrane filter may be used as the

filter members

131a and 132a, and the membrane filter is a membrane-like filter, in which uniform micropores are formed in the membrane, and the diameter of these pores can pass through the air. It is preferable that the external moisture is formed in a size that does not pass, and through this, it is possible to effectively prevent the inflow of moisture while resolving the high pressure state inside the space in which the first control unit 110 and the second control unit 120 are disposed. .

Although one embodiment of the present invention has been described, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art to understand the spirit of the present invention, within the scope of the same spirit, addition and modification of components However, other embodiments may be easily proposed by deletion, addition, or the like, but this will also be considered to be within the scope of the present invention.

Claims

An electric drive control device that performs control of an electric motor that generates a driving force,

A first control unit disposed on one side of the motor housing in which the electric motor is housed to control the electric motor;

A second control unit disposed opposite to the first control unit and controlling the electric motor together with the first control unit or independently of the first control unit;

A heat dissipation unit that dissipates heat generated by the first control unit and the second control unit; And

A sealing unit blocking moisture from entering the space where the first control unit and the second control unit are disposed;

Electric drive control device comprising a.
According to claim 1,

The sealing unit is divided into a space in which the first control unit is disposed and a space in which the second control unit is disposed, so that the electric drive control device is divided.
According to claim 1,

The heat dissipation unit is disposed between the first control unit and the second control unit, and includes a plate-shaped first heat dissipation member extending along the rotation axis direction of the electric motor,

The sealing portion is an electric drive control device disposed along the circumference of the first heat dissipation member.
According to claim 3,

A first insertion groove is formed on the side surface of the first heat dissipation member and extends along the rotation axis direction of the electric motor.

A second insertion groove extending in the radial direction of the electric motor is formed on the front surface of the first heat dissipation member,

The sealing portion is an electric drive control device that is inserted into the first insertion groove and the second insertion groove.
According to claim 4,

Further comprising a cover portion coupled along the rotation axis direction of the electric motor so as to surround the first control unit and the second control unit,

The sealing portion is an electric drive control device that is fixedly arranged along the inner circumferential surface of the cover portion.
The method of claim 5,

The sealing portion is disposed along the direction of the rotation axis of the electric motor, the first sealing member is inserted into the first insertion groove, and the second sealing member is disposed along the radial direction of the electric motor and inserted into the second insertion groove. Electric drive control device comprising.
The method of claim 6,

An electric drive control device in which at least one of the first sealing member and the second sealing member has a protrusion formed in the same direction as the direction in which the first insertion groove or the second insertion groove is formed.
The method of claim 5,

An electric drive control device manufactured by a double injection method so that the cover portion is integrally disposed on the inner circumferential surface of the cover portion.
The method of claim 5,

An annular second heat dissipation member is provided at a rear surface of the first heat dissipation member disposed adjacent to the electric motor,

The sealing portion further includes a third sealing member disposed along the circumference of the second heat dissipation member so as to be pressed by one end of the cover portion.
The method of claim 5,

An electric drive control device in which the first vent hole communicating the space in which the first control unit is disposed is communicated with the outside, and a second vent hole communicating the space in which the second control unit is disposed is communicated with the outside.
The method of claim 10,

An electric drive control device that is provided with filter members on inner circumferential surfaces of the first ventilation hole and the second ventilation hole, respectively.