KR20110106575A - Eletronic control unit of electric power steering apparatus and electric power steering apparatus for vehicle having the same - Google Patents

Eletronic control unit of electric power steering apparatus and electric power steering apparatus for vehicle having the same Download PDF

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Publication number
KR20110106575A
KR20110106575A KR1020100025685A KR20100025685A KR20110106575A KR 20110106575 A KR20110106575 A KR 20110106575A KR 1020100025685 A KR1020100025685 A KR 1020100025685A KR 20100025685 A KR20100025685 A KR 20100025685A KR 20110106575 A KR20110106575 A KR 20110106575A
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KR
South Korea
Prior art keywords
circuit board
printed circuit
metal
heat sink
metal printed
Prior art date
Application number
KR1020100025685A
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Korean (ko)
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KR101393156B1 (en
Inventor
최대근
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주식회사 만도
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Priority to KR1020100025685A priority Critical patent/KR101393156B1/en
Publication of KR20110106575A publication Critical patent/KR20110106575A/en
Application granted granted Critical
Publication of KR101393156B1 publication Critical patent/KR101393156B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0403—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box
    • B62D5/0406—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box including housing for electronic control unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
    • B62D5/046—Controlling the motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/03—Reducing weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/05—Reducing production costs, e.g. by redesign
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2410/00—Constructional features of vehicle sub-units
    • B60Y2410/114—Shields, e.g. for heat protection

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  • Engineering & Computer Science (AREA)
  • Power Steering Mechanism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)

Abstract

The present invention relates to an electronic control apparatus of an electric steering apparatus and an electric steering apparatus of an automobile having the same. According to the present invention, a metal printed circuit board equipped with a field effect transistor is arranged horizontally with a main printed circuit board and directly connected to a heat sink. This eliminates the need for a jig or additional process for joining the metal printed circuit board to the main printed circuit board, which improves manufacturability and assembly, and reduces manufacturing costs, and between the metal printed circuit board and the main printed circuit board and the heat sink. By coating and combining insulation grease with good heat dissipation, it is possible to prevent breakage of field effect transistors due to high heat, to prevent errors, and to maximize heat dissipation effect while reducing weight and cost of an electronic control device.

Description

ELECTRONIC CONTROL DEVICE OF ELECTRONIC STEERING DEVICE AND ELECTRONIC STEERING APPARATUS OF THE INVENTION

The present invention relates to an electronic control apparatus of an electric steering apparatus. More specifically, metal printed circuit boards equipped with field effect transistors are arranged horizontally with the main printed circuit board and mounted directly on the heat sink, eliminating the need for jig or additional process for joining the metal printed circuit board to the main printed circuit board. It improves manufacturability and assembly, and reduces manufacturing cost, and prevents breakage of field effect transistors due to high heat by applying and bonding insulating grease with good insulation and heat dissipation between these metal printed circuit boards and main printed circuit boards and heat sinks. The present invention relates to an electronic control apparatus of an electric steering apparatus capable of maximizing heat dissipation effect while preventing errors and reducing weight and cost of the electronic control apparatus, and an electric steering apparatus of an automobile having the same.

In general, as a steering device of a vehicle, a hydraulic power steering device (HPS) using a hydraulic pressure of a hydraulic pump is used. However, since the 1990s, electric power steering devices (EPS) using electric motors have become increasingly common.

In the case of the hydraulic steering system, the hydraulic pump, which is a power source for supplying steering auxiliary power, is driven by the engine and always consumes energy regardless of whether the steering wheel is rotated. In the case of the electric steering system, the steering wheel is rotated by the rotation of the steering wheel. When steering torque is generated, the motor supplies steering auxiliary power proportional to the generated steering torque. Therefore, the use of the electric steering apparatus can improve the energy efficiency compared to using the hydraulic steering apparatus.

1 is a configuration diagram schematically showing a general electric steering device, Figure 2 is a perspective view showing a state in which a conventional electronic control device is mounted on the electric steering device.

As shown in these figures, generally, the electric steering apparatus includes a steering system 100 extending from the steering wheel 101 to both wheels 108 and an auxiliary power mechanism for supplying steering assistance power to the steering system 100. And 120.

The steering system 100 has a top end connected to the steering wheel 101 and a bottom end connected to the pinion shaft 104 via a pair of universal joints 103 to rotate together with the steering wheel 101. It is configured to include). In addition, the pinion shaft 104 is connected to the rack bar 109 via the rack-pinion mechanism 105, and both ends of the rack bar 109 are connected to the wheel 108 through the tie rod 106 and the knuckle arm 107. Connected.

The rack-pinion mechanism part 105 is formed by engaging the pinion gear 111 formed at the lower end of the pinion shaft 104 and the rack gear 112 formed at one side of the outer circumferential surface of the rack bar 109. Through the rack-pinion mechanism 105, the rotational movement of the pinion shaft 104 changes to the linear movement of the rack bar 109.

Therefore, when the driver operates the steering wheel 101, the pinion shaft 104 rotates, and the rack bar 109 linearly moves in the axial direction according to the rotation of the pinion shaft 104, and the linear movement of the rack bar 109 is performed. The tie rods 106 and knuckle arms 107 are steered through the wheels.

The auxiliary power mechanism 120 includes a torque sensor 121 that senses steering torque applied by the driver to the steering wheel 101 and outputs an electrical signal proportional to the detected steering torque, and is transmitted from the torque sensor 121. An electronic control unit (ECU) 123 for generating a control signal based on an electrical signal, a motor 130 for generating steering assistance power based on a control signal transmitted from the electronic control device 123, and In order to transmit the steering assistance power generated by the motor 130 to the steering shaft 102 is configured to include a reducer 113 consisting of a worm shaft and a worm wheel.

In such an electric steering apparatus, the electronic controller 123 is one of the core parts of the electric steering apparatus. The electronic controller 123 analyzes the electric signal transmitted from the external sensor, and grasps the driver's steering intention and driving condition of the vehicle, and calculates the amount of control current of the motor using various logics mounted thereon. To control the motor.

2 is an exploded perspective view illustrating an electronic control apparatus of a conventional electric steering apparatus. As illustrated, the conventional electronic control apparatus 123 includes a heat sink 210 and a main printed circuit board 230. ) And a cover 240.

The main printed circuit board 230 includes a capacitor, a shunt resistor, a field effect transistor 225 mounted on the metal printed circuit board 220, a coil, and a microcomputer. It is equipped with components such as relay, current sensor and power connector.

The cover 240 is positioned to be spaced apart from the main printed circuit board 230 by a predetermined distance and is formed of metal. The heat sink 210 generates high heat from a plurality of heat generating parts mounted therein, such as the field effect transistor 225, when the electronic control device 123 is driven. It is a device for releasing into the air.

Since the heat sink 210 must dissipate heat quickly, the heat sink 210 is made of metal such as aluminum or copper having good thermal conductivity. The heat sink 210 is coupled to the main printed circuit board 230 and the cover 240 by fixing means such as bolts.

In the conventional electronic control apparatus, since the metal printed circuit board is vertically coupled to the main printed circuit board, a jig or a process for this is additionally required, resulting in a low manufacturing and assembly ability and an increase in manufacturing cost.

In addition, although a large amount of heat is generated in the metal printed circuit board on which the field effect transistor is mounted as a current required for driving the motor flows, the heat dissipation effect of the metal printed circuit board and the heat dissipation layer is inferior.

In addition, since the heat radiation of the metal printed circuit board is not properly made, the expensive field effect transistor is damaged or an error occurs.

Accordingly, the present invention has been made to solve the above problems, by arranging a metal printed circuit board equipped with a field effect transistor horizontally with the main printed circuit board and directly mounted to the heat sink to mount the metal printed circuit board to the main printed circuit board. It eliminates the need for jig or additional process for joining, which improves manufacturability and assembly, and reduces manufacturing costs.By applying and insulating insulating grease with good insulation and heat dissipation between the metal printed circuit board and the main printed circuit board and the heat sink. The purpose is to prevent breakage of field effect transistors due to high heat, to prevent errors, and to maximize the heat dissipation effect while reducing the weight and cost of the electronic control apparatus.

In order to achieve the above object, an embodiment of the present invention provides an electronic control apparatus for an electric steering apparatus including a heat sink, a shunt resistor, a main printed circuit board, and a metal printed circuit board, wherein the metal printed circuit board is the main board. An electronic control apparatus for an electric steering apparatus, characterized in that arranged side by side with a printed circuit board.

In addition, another embodiment of the present invention, an automobile including a motor for generating a steering auxiliary power based on a control signal transmitted from an electronic control device including a heat sink and a shunt resistor and a main printed circuit board and a metal printed circuit board. The electric steering apparatus of claim 1, wherein the electronic control apparatus provides the electric steering apparatus of an automobile, wherein the metal printed circuit board is arranged in parallel with the main printed circuit board.

According to the present invention, a jig or an additional process for coupling the metal printed circuit board to the main printed circuit board is required by arranging the metal printed circuit board on which the field effect transistor is mounted horizontally with the main printed circuit board and directly mounted on the heat sink. This improves the manufacturability and assembly, and reduces the manufacturing cost.

In addition, by insulating and greaseing insulating grease between the substrate and the heat sink, it prevents damage of the field effect transistor due to high heat, prevents errors, and maximizes the heat dissipation effect while reducing the weight and cost of the electronic control device. It will work.

1 is a configuration diagram schematically showing a general electric steering device,
2 is an exploded perspective view showing an electronic control apparatus of a conventional electric steering apparatus;
3 and 4 are exploded perspective views of the electronic control apparatus of the electric steering apparatus according to an embodiment of the present invention viewed from one side and the other side.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used to refer to the same components as much as possible even if displayed on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but there may be another configuration between each component. It is to be understood that the elements may be "connected", "coupled" or "connected".

3 and 4 are exploded perspective views of the electronic control apparatus of the electric steering apparatus according to an embodiment of the present invention viewed from one side and the other side.

As shown in these drawings, the electronic control apparatus 300 of the electric steering apparatus according to an embodiment of the present invention includes a heat sink 320, a shunt resistor 333, a main printed circuit board 330, and metal printing. It is configured to include a circuit board 340 and the cover 310, the metal printed circuit board 340 is characterized in that arranged in parallel with the main printed circuit board 330.

That is, the terminal 343 of the metal printed circuit board 340 is coupled to the main printed circuit board 330, and the metal substrate of the metal printed circuit board 340 is coupled to the heat sink 320 by the fastening member 350. Since the metal printed circuit board 340 and the main printed circuit board 330 are arranged horizontally side by side, there is no need for a jig or an additional process for coupling the metal printed circuit board 340 to the main printed circuit board 330. This improves manufacturability and assembly and reduces manufacturing costs.

The cover 310, which is formed of metal, is spaced apart from the main printed circuit board 330 by a predetermined distance and is coupled to the heat sink 320.

The main printed circuit board 330 is equipped with a capacitor 331, a shunt resistor 333, a coil 335, a microcomputer, a relay, a current sensor, a power connector 337, and the like.

The capacitor 331 absorbs the ripple current included in the current supplied to the motor, the shunt resistor 333 senses the current supplied to the motor, and the coil removes electromagnetic noise. The microcomputer calculates steering assistance power based on steering torque or vehicle speed.

The metal printed circuit board 340 includes a field effect transistor 345 or other elements mounted on the metal substrate, and a fastening hole 347a for fastening with the heat sink 320.

The field effect transistor 345 switches the current supplied to the motor according to the magnitude and direction of the steering assist power, and the field effect transistor 345 or a circuit of the elements is printed on the metal substrate.

The heat sink 320 is a device that dissipates heat generated in the main printed circuit board 330 and the metal printed circuit board 340 into the air. The heat sink 320 is coupled to the cover 310 together with the metal printed circuit board 340. A fastening hole 347b for fastening is provided.

The heat sink 320 is a device for dissipating heat generated and transmitted from a plurality of heat generating parts mounted therein, such as the field effect transistor 345, to the outside air when the electronic controller 300 is driven. ) Is made of metal such as aluminum or copper, which has good thermal conductivity because it needs to dissipate heat quickly.

The heat dissipation plate 320 has a metal support printed circuit board 340 and a main printed circuit board 330 arranged side by side in parallel to each other, and have a support surface 325 provided below the substrate to form a metal print. The circuit board 340 and the main printed circuit board 330 are horizontally arranged to be supported by the support surface 325.

In addition, insulating grease is applied to the heat sink 320 at the corresponding positions of the shunt resistor 333 and the metal printed circuit board 340, that is, the support surface 325, so that the shunt resistor 333 and the metal printed circuit board are provided. The heat dissipation plate 320, the main printed circuit board 330, and the metal printed circuit board 340 are coupled to the cover 310 while 340 prevents a short circuit with the heat sink 320 and dissipates heat.

The support surface 325 of the heat dissipation plate 320 is formed at a corresponding position between the shunt resistor 333 and the metal printed circuit board 340, and an insulating grease is applied to these support surfaces 325 to apply these shunt resistors ( 333 and the metal printed circuit board 340 prevents a short circuit between the heat sink 320 and dissipates heat, while the heat sink 320, the main printed circuit board 330, and the metal printed circuit board 340 are covered ( 310 may be combined.

Therefore, the heat dissipation performance is improved as compared with the conventional electronic control device, so that the durability life of expensive components is long, the error due to overheating is reduced, and the cost is reduced.

After the heat sink 320 is combined with the main printed circuit board 330 and the metal printed circuit board 340 by the insulating grease applied to the support surface 325, the insulating grease also serves as a heat dissipation therebetween. Insulating grease takes heat from the main printed circuit board 330 and the metal printed circuit board 340 and transfers the heat to the heat sink 320.

Insulating grease is used in the general industry, and is made of a material having high insulation and heat transfer rate based on silicon, synthetic silicon, urethane, etc. Rapid heat transfer from the heat sink 320 to the heat sink 320 prevents a short circuit.

Meanwhile, referring to FIG. 1, the electronic control apparatus 300 may include a steering wheel 101 of a vehicle, a pinion shaft connected to the steering wheel 100, and having a pinion gear 111 formed at one side thereof. A rack bar 109 having a rack gear 112 meshing with the pinion gear 111 and a torque sensor 121 for sensing steering torque applied to the steering wheel 101 and outputting an electrical signal; And a control signal based on an electrical signal transmitted from the torque sensor 121, and includes a heat sink 320, a shunt resistor 333, a main printed circuit board 330, a metal printed circuit board 340, and a cover ( An electric steering apparatus of an automobile including an electronic control apparatus 300 including a 310 and a motor 130 generating steering assistance power based on a control signal transmitted from the electronic control apparatus 300 is configured. .

Here, since the electronic control device 300 is the same as the electronic control device 300 of the electric steering apparatus according to an embodiment of the present invention described above will be omitted.

According to the present invention, a jig or an additional process for coupling the metal printed circuit board to the main printed circuit board is required by arranging the metal printed circuit board on which the field effect transistor is mounted horizontally with the main printed circuit board and directly mounted on the heat sink. This improves the manufacturability and assembly, and reduces the manufacturing cost.

In addition, by applying and bonding insulating grease with good insulation and heat dissipation between the metal printed circuit board and the main printed circuit board and the heat sink, it prevents damage of the field effect transistor due to high heat and prevents errors. The cost can be reduced while maximizing the heat dissipation effect.

In the above description, all elements constituting the embodiments of the present invention are described as being combined or operating in combination, but the present invention is not necessarily limited to the embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more.

In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be included, unless otherwise stated, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meanings as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

310: cover 320: heat sink
325: support surface 330: main printed circuit board
333: shunt resistor 340: metal printed circuit board
345: field effect transistor 350: fastening member

Claims (10)

In the electronic control device of the electric steering apparatus including a heat sink, a shunt resistor, a main printed circuit board and a metal printed circuit board,
And the metal printed circuit board is arranged side by side with the main printed circuit board. The method of claim 1,
And a terminal of the metal printed circuit board is coupled to the main printed circuit board, and a metal substrate of the metal printed circuit board is coupled to the heat dissipation plate. The method of claim 1,
The heat dissipation plate, the electronic control device of the electric steering apparatus characterized in that the support surface is provided so that the metal printed circuit board and the main printed circuit board is arranged side by side and coupled. The method of claim 1,
Insulating grease is applied to the heat sink to the corresponding position of the shunt resistor and the metal printed circuit board and coupled to the main printed circuit board and the metal printed circuit board. The method of claim 3, wherein
The support surface of the heat sink is formed in a corresponding position of the shunt resistor and the metal printed circuit board, the insulating grease is applied to the support surface is coupled to the main printed circuit board and the metal printed circuit board, characterized in that Electronic controller of electric steering system. In a motor-driven steering apparatus of a motor vehicle comprising a motor for generating steering assistance power based on a control signal transmitted from an electronic control apparatus including a heat sink and a shunt resistor and a main printed circuit board and a metal printed circuit board,
The electronic control device,
And the metal printed circuit board is arranged in parallel with the main printed circuit board. The method according to claim 6,
And the terminal of the metal printed circuit board is coupled to the main printed circuit board, and the metal substrate of the metal printed circuit board is coupled to the heat sink. The method according to claim 6,
The heat dissipation plate is an electric steering apparatus of a vehicle, characterized in that the support surface is provided so that the metal printed circuit board and the main printed circuit board is arranged side by side and coupled. The method according to claim 6,
Insulating grease is applied to the heat sink to the corresponding position of the shunt resistor and the metal printed circuit board is coupled to the main printed circuit board and the metal printed circuit board. The method of claim 8,
The support surface of the heat sink is formed in a corresponding position of the shunt resistor and the metal printed circuit board, the insulating grease is applied to the support surface is coupled to the main printed circuit board and the metal printed circuit board, characterized in that Motorized steering of automobiles.
KR1020100025685A 2010-03-23 2010-03-23 Eletronic Control Unit of Electric Power Steering Apparatus and Electric Power Steering Apparatus for Vehicle having The Same KR101393156B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100025685A KR101393156B1 (en) 2010-03-23 2010-03-23 Eletronic Control Unit of Electric Power Steering Apparatus and Electric Power Steering Apparatus for Vehicle having The Same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100025685A KR101393156B1 (en) 2010-03-23 2010-03-23 Eletronic Control Unit of Electric Power Steering Apparatus and Electric Power Steering Apparatus for Vehicle having The Same

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KR20110106575A true KR20110106575A (en) 2011-09-29
KR101393156B1 KR101393156B1 (en) 2014-05-09

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KR1020100025685A KR101393156B1 (en) 2010-03-23 2010-03-23 Eletronic Control Unit of Electric Power Steering Apparatus and Electric Power Steering Apparatus for Vehicle having The Same

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015152622A1 (en) * 2014-03-31 2015-10-08 대우전자부품(주) Printed circuit board having radiating and grounding functions
CN109318982A (en) * 2018-08-02 2019-02-12 江苏大学 A kind of hybrid power steering system characteristic parameter matching method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015152622A1 (en) * 2014-03-31 2015-10-08 대우전자부품(주) Printed circuit board having radiating and grounding functions
CN109318982A (en) * 2018-08-02 2019-02-12 江苏大学 A kind of hybrid power steering system characteristic parameter matching method
CN109318982B (en) * 2018-08-02 2021-05-25 江苏大学 Parameter matching method for hybrid power steering system

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Publication number Publication date
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