CN112769370B - EPS circuit board - Google Patents
EPS circuit board Download PDFInfo
- Publication number
- CN112769370B CN112769370B CN202011623322.3A CN202011623322A CN112769370B CN 112769370 B CN112769370 B CN 112769370B CN 202011623322 A CN202011623322 A CN 202011623322A CN 112769370 B CN112769370 B CN 112769370B
- Authority
- CN
- China
- Prior art keywords
- circuit board
- power
- motor
- current
- eps
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 230000005669 field effect Effects 0.000 description 34
- 101100119059 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ERG25 gene Proteins 0.000 description 7
- 101150015217 FET4 gene Proteins 0.000 description 5
- 101100484930 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) VPS41 gene Proteins 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 5
- 101150073536 FET3 gene Proteins 0.000 description 3
- 101150079361 fet5 gene Proteins 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
- Inverter Devices (AREA)
Abstract
An EPS circuit board is arranged on the upper part of a motor and used for driving the motor, and current detection resistors R1, R2 and R3 are arranged in the junction area of a power part S1 and a control part S2, so that the current detection resistors R1, R2 and R3 are wrapped by the power part S1, a sampling signal line is wrapped by the control part S2, and the noise interference of current sampling signals is reduced. Compared with the prior art, the invention has the advantages of stable sampling signal of the current detection resistance bit and difficult interference.
Description
Technical Field
The invention relates to the technical field of EPS, in particular to an EPS circuit board.
Background
In EPS (electric power steering) it is necessary to drive a motor by an inverter mounted on a substrate, and the inverter is composed of field effect transistor FET while a current detecting resistor is present for detecting the magnitude of the actual current of the motor.
In the traditional scheme, the positions of the three current detection resistors are placed irregularly and can be found, the sampling circuit is easy to interfere, and therefore the actual current of the motor detected by the microcontroller is inaccurate, and the motor cannot be controlled well.
Disclosure of Invention
The invention aims to provide an EPS circuit board with a current detection resistor layout structure.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
The current detection resistors R1, R2, R3 are arranged in the area where the power section S1 and the control section S2 are located, so that the current detection resistors R1, R2, R3 are wrapped by the power section S1, the sampling signal line is wrapped by the control section S2, and the current sampling signal noise is controlled to be at a reasonable level.
Compared with the prior art, the invention has the advantages of stable sampling signal of the current detection resistance bit and difficult interference.
Drawings
FIG. 1 is a schematic circuit diagram of an EPS circuit board of the present invention;
fig. 2 is a layout diagram of a current sensing resistor of an EPS circuit board according to the invention.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, the present invention relates to an EPS circuit board current detection resistor layout structure, and the EPS electronic control unit includes a power section S1 and a control section S2. The power part S1 is a power circuit part formed by power components such as field effect transistors FET1-FET11, an electrolytic capacitor C10, shunt resistors R1-R3 and the like, and the specific connection mode is as follows: the 6 field effect transistors FET1 to FET6 constitute an inverter circuit INV, and are connected between a positive electrode line ND+ of a potential B+ connected to a positive substrate connection portion CN+ and a negative electrode line ND-of a potential B+ connected to a negative substrate connection portion CN-. The electrolytic capacitor C10 is connected in parallel with the inverter circuit INV between the positive electrode line nd+ and the negative electrode line ND-. Shunt resistors R1-R3 are connected in series between the field effect transistors FET2, FET4, FET6 and the negative plate ND-, respectively. The field effect transistor FET10 and the field effect transistor FET11 are connected as semiconductor switches capable of cutting off power to a preceding stage of a node nd+ connecting the inverter circuit INV and the positive line of the electrolytic capacitor C10.
The field effect transistor FET1 and the field effect transistor FET2 are connected in series between the positive electrode line and the negative electrode line. The field effect transistor FET1 and the field effect transistor FET2 supply U-phase currents to the U-phase windings of the motor. The shunt resistor R1 is connected in series between the field effect transistor FET2 and the negative electrode line, and detects a current flowing through the shunt resistor R1. The field effect transistor FET7 is connected between the connection lines of the field effect transistor FET1 and the field effect transistor FET2 and the inverter output terminal TU. The field effect transistor FET7 cuts off or passes U-phase current.
The field effect transistor FET3 and the field effect transistor FET4 are connected in series between the positive electrode line and the negative electrode line. The field effect transistor FET3 and the field effect transistor FET4 supply V-phase current to the V-phase winding of the motor. The shunt resistor R2 is connected in series between the field effect transistor FET4 and the negative electrode line, and detects a current flowing through the shunt resistor R2. The field effect transistor FET8 is connected between the connection line of the field effect transistor FET3 and the field effect transistor FET4 and the inverter output terminal TV. The field effect transistor FET8 cuts off or passes V-phase current.
The field effect transistor FET5 and the field effect transistor FET6 are connected in series between the positive electrode line and the negative electrode line. The field effect transistor FET5 and the field effect transistor FET6 supply W-phase current to the W-phase winding of the motor. The shunt resistor R4 is connected in series between the field effect transistor FET6 and the negative electrode line, and detects a current flowing through the shunt resistor R3. The field effect transistor FET9 is connected between a line connecting the field effect transistor FET5 and the field effect transistor FET6 and the inverter output terminal TW. The field effect transistor FET9 cuts off or passes W-phase current.
The electrolytic capacitor C10 is connected in parallel with the inverter circuit INV between the positive electrode line nd+ and the negative electrode line ND-, and the electrolytic capacitor C10 smoothes the power supply voltage (the difference between the potential b+ and the potential B-.
The inverter INV composed of the field effect transistors FET1 to FET6 supplies the U-phase current, the V-phase current, and the W-phase current to the motor by being PWM-controlled, respectively. The inverter INV output terminal TU is connected to the motor power supply terminal T1 via the power supply line unit LNU. The inverter INV output terminal TV is connected to the motor power supply terminal T2 via the power supply line portion LNV. The inverter output terminal TW is connected to the motor power supply terminal T3 via the power supply line portion LNW.
The control section S1 is composed of a power circuit CC1, a microprocessor CC2, a driving circuit CC3, and other non-power devices not shown in fig. 1.
As shown in fig. 2, the present invention relates to an arrangement structure of current detection resistors of an EPS circuit board, wherein 3 dark boxes in the figure represent the current detection resistors R1, R2, R3, the left side of a black boundary in the middle vertical direction represents the power section S1, and the right side represents the control section S2. The current detection resistors R1, R2, R3 are disposed in the region where the power section S1 and the control section S2 interface, so that the power section of the current detection resistor is surrounded by the power section S1. Three short black lines on the right side of the current detection resistor represent sampling signal lines, and the sampling signal lines are wrapped by the control part S2. The layout mode can stabilize the current sampling signal and is not easy to interfere.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the concept of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (5)
1. An EPS circuit board installs in motor upper portion for driving motor, its characterized in that: comprises a power part S1, a control part S2 and a current detection resistor;
The control part S2 is used for outputting a driving signal required for driving the motor;
the power unit S1 supplies the current of the external power source to the motor according to the drive signal outputted from the control unit S2;
the current detection resistor is used for detecting the current flowing in the inverter circuit in the power part S1, and the current detection resistor is provided with a power part for passing the inverter current and a signal part for current sampling; the current detection resistor is configured in the area where the control part S2 and the power part S1 are in a boundary, so that the power part of the current detection resistor is wrapped by the power part S1, the signal part wiring is wrapped by the control part S2, and the noise interference of a current sampling signal is reduced;
the EPS circuit board is a single circuit board, and the power part S1 and the control part S2 are distributed left and right;
the bottom side of the circuit board is tightly matched with the radiator above the motor.
2. An EPS circuit board according to claim 1, characterized in that: a microprocessor and a power supply circuit are arranged on the bottom surface side of the circuit board, and a pre-drive circuit and a power component are arranged on the bottom surface side or the front surface side.
3. An EPS circuit board according to claim 1, characterized in that: a torque interface circuit and a CAN circuit are disposed in the vicinity of the external connection connector on the front side of the circuit board.
4. An EPS circuit board according to claim 1, characterized in that: a magnet is assembled at the center of the rotor of the motor near the end of the circuit board, and an angle decoding chip is arranged corresponding to the circuit board.
5. An EPS circuit board according to claim 1, characterized in that: the board side of the circuit board is provided with output terminals of a three-phase bridge circuit for generating an alternating current power supply for driving the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011623322.3A CN112769370B (en) | 2020-12-30 | 2020-12-30 | EPS circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011623322.3A CN112769370B (en) | 2020-12-30 | 2020-12-30 | EPS circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112769370A CN112769370A (en) | 2021-05-07 |
| CN112769370B true CN112769370B (en) | 2024-04-23 |
Family
ID=75698698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011623322.3A Active CN112769370B (en) | 2020-12-30 | 2020-12-30 | EPS circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112769370B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104039073A (en) * | 2013-03-06 | 2014-09-10 | 株式会社电装 | Electronic control unit |
| CN204465400U (en) * | 2015-04-08 | 2015-07-08 | 珠海英搏尔电气有限公司 | Sinusoidal wave control DC brushless motor controller |
| JP2017163774A (en) * | 2016-03-11 | 2017-09-14 | 日本精工株式会社 | Motor controller, and electric power steering device mounted with the same |
| CN109510562A (en) * | 2019-01-02 | 2019-03-22 | 广东美的暖通设备有限公司 | Power module, air conditioner |
| WO2019058668A1 (en) * | 2017-09-21 | 2019-03-28 | 日本電産株式会社 | Motor control method, power conversion device, motor module, and electric power steering device |
| CN109586517A (en) * | 2017-09-29 | 2019-04-05 | 日本电产艾莱希斯株式会社 | Circuit board, motor drive and electric power steering apparatus |
| WO2019189645A1 (en) * | 2018-03-30 | 2019-10-03 | 日本電産エレシス株式会社 | Electronic control unit for electric power steering |
| CN111284331A (en) * | 2018-12-07 | 2020-06-16 | 瑷司柏电子股份有限公司 | Motor control device with built-in shunt resistor and power transistor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4877265B2 (en) * | 2008-04-09 | 2012-02-15 | 三菱電機株式会社 | Electric power steering apparatus and manufacturing method thereof |
| JP5201171B2 (en) * | 2010-05-21 | 2013-06-05 | 株式会社デンソー | Semiconductor module and driving device using the same |
-
2020
- 2020-12-30 CN CN202011623322.3A patent/CN112769370B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104039073A (en) * | 2013-03-06 | 2014-09-10 | 株式会社电装 | Electronic control unit |
| CN204465400U (en) * | 2015-04-08 | 2015-07-08 | 珠海英搏尔电气有限公司 | Sinusoidal wave control DC brushless motor controller |
| JP2017163774A (en) * | 2016-03-11 | 2017-09-14 | 日本精工株式会社 | Motor controller, and electric power steering device mounted with the same |
| WO2019058668A1 (en) * | 2017-09-21 | 2019-03-28 | 日本電産株式会社 | Motor control method, power conversion device, motor module, and electric power steering device |
| CN109586517A (en) * | 2017-09-29 | 2019-04-05 | 日本电产艾莱希斯株式会社 | Circuit board, motor drive and electric power steering apparatus |
| WO2019189645A1 (en) * | 2018-03-30 | 2019-10-03 | 日本電産エレシス株式会社 | Electronic control unit for electric power steering |
| CN111284331A (en) * | 2018-12-07 | 2020-06-16 | 瑷司柏电子股份有限公司 | Motor control device with built-in shunt resistor and power transistor |
| CN109510562A (en) * | 2019-01-02 | 2019-03-22 | 广东美的暖通设备有限公司 | Power module, air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112769370A (en) | 2021-05-07 |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |