CN106427836A - CANFD gateway circuit for electric power-assisted steering - Google Patents
CANFD gateway circuit for electric power-assisted steering Download PDFInfo
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- CN106427836A CN106427836A CN201610977979.7A CN201610977979A CN106427836A CN 106427836 A CN106427836 A CN 106427836A CN 201610977979 A CN201610977979 A CN 201610977979A CN 106427836 A CN106427836 A CN 106427836A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
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- Details Of Connecting Devices For Male And Female Coupling (AREA)
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Abstract
The invention relates to the technical field of circuits, in particular to a CANFD gateway circuit for electric power-assisted steering. A temperature detection circuit is used for monitoring the temperature information of the whole circuit and a power supply reverse connection protective circuit is designed, so impact damage of voltage to the gateway hardware circuit is avoided; the whole gateway circuit is integrated and improved, so that the gateway circuit can be conveniently applied to various types of automobiles.
Description
Technical field
The present invention relates to field of circuit technology, is concretely a kind of CANFD gateway circuit for electric power steering.
Background technology
EPS mainly contains driver element, upper tubing string, jackshaft and four parts of manual steering gear, and gateway is just
It is the middle device as connection EPS and car load network.Gateway in vehicle is all the circuit that is managed using subregion at present
Feedback is attached, do so significantly increases the layout of circuit in vehicle, and easily occurs that power source temperature is too high to be burnt
Bad situation, once power supply is burned the disconnection that will result in car load network and EPS, causes vehicle to be paralysed, threatens driving
Safety.
A kind of CANFD gateway electricity of the function with detection power source temperature protection power supply of integration is devised for this present invention
Road.
Content of the invention
The present invention breaches a difficult problem for prior art, and devise a kind of integration protects power supply with detection power source temperature
The CANFD gateway circuit of function.
In order to achieve the above object, the present invention devises a kind of CANFD gateway circuit for electric power steering, bag
Include：MCU minimum system circuit, EMC filter circuit, power circuit, CAN communication circuit, power source reverse connection protection circuit, temperature detection
Circuit, it is characterised in that：MCU minimum system circuit is connected with power circuit, temperature sensing circuit, CAN communication circuit respectively, electricity
Source circuit is divided into 2 tunnels again and is connected with CAN communication circuit, power source reverse connection protection circuit respectively, power source reverse connection protection circuit also with
EMC filter circuit, CAN communication circuit are connected, and EMC filter circuit is connected with CAN communication circuit.
The MCU minimum system circuit is by main circuit board, crystal oscillating circuit, MCU debugging interface circuit and electric source filter circuit
Composition, the JP0 TDI of the wherein main circuit board of main circuit board, JP1 TDO, JP2 TCK, JP5 TRDY port are adjusted with MCU respectively
Examination interface circuit is connected, and EVCC, AVCC port of main circuit board is connected to electric source filter circuit, X1, X2 of main circuit board
Port is connected with crystal oscillating circuit, the RESET interface of main circuit board be divided into 2 tunnels respectively with power circuit, MCU debugging interface circuit phase
Connect, TXD1, RXD1, TXD2, RXD2, TJA1145 SOMI1, TJA1145 SIMO1, TJA1145 CLK1 of main circuit board,
TJA1145 SCSN1、TJA1051 S1、TJA1051 S2、TJA1145 SCSN2、TJA1145 SIMO2、TJA1145 CLK2、
TJA1145 SOMI2 port is connected with CAN communication circuit, and the MCUTemp port of main circuit board is connected with temperature sensing circuit, main
The AWOVSS port of circuit board is divided into 2 tunnels and is connected with the one end on ground, electric capacity C34 respectively, the other end of electric capacity C34 then with main electricity
The AWOVAL port of road plate is connected, the EVSS port ground connection of main circuit board, and the A0VSS port of main circuit board is also grounded, main circuit
The ISOVSS port of plate is divided into 2 tunnels and is connected with the one end on ground, electric capacity C33 respectively, the other end of electric capacity C33 and main circuit board
ISOVCL port is connected, and the FLMD0 of main circuit board is divided into the one end of 2 tunnels respectively with resistance R4, MCU debugging interface circuit and is connected,
The other end ground connection of resistance R4.
The crystal oscillating circuit is made up of electric capacity C35, electric capacity C36 and crystal oscillator Y1, one end of crystal oscillator Y1 be divided into 2 tunnels respectively with master
The X2 port of circuit board, one end of electric capacity C35 are connected, the other end of crystal oscillator Y1 be divided into X1 port of 2 tunnels respectively with main circuit board,
One end of electric capacity C36 is connected, and the other end of electric capacity C35 is connected with the other end of electric capacity C36 and is grounded.
The JP2 TCK end of the TCK/FPCK port of the debugging circuit board in the MCU debugging interface circuit and main circuit board
Mouth is connected, and the TDO/FPDT port of debugging circuit board is connected with the JP1 TDO port of main circuit board, the TDI/ of debugging circuit board
FPDT port is divided into JP0 TDI port of 2 tunnels respectively with main circuit board, one end of reserved resistance R15 and is connected, reserved resistance R15
Other end ground connection, the RDY port of debugging circuit board is connected with the JP5 TRDY port of main circuit board, debugging circuit board
RESET port is connected with the RESET port of main circuit board, the GND port ground connection of debugging circuit board, the FLMD0 of debugging circuit board
Port is connected with the FLMD0 port of main circuit board, and the vdd terminal mouth of debugging circuit board is connected with 5v power supply.
In the electric source filter circuit, AVCC port is divided into AVCC port of 9 tunnels respectively with main circuit board, 5v power supply, electric capacity
One end of C23, the EVCC port of main circuit board, one end of electric capacity C26, one end of electric capacity C27, one end of electric capacity C28, electric capacity
One end of C24, one end of electric capacity C25 is connected, and the other end of electric capacity C23 is connected with ground, and the other end of electric capacity C26 is divided into 5 tunnels
Respectively with ground, the other end of electric capacity C27, the other end of electric capacity C28, the other end of electric capacity C24, the other end phase of electric capacity C25
Even.
In the EMC filter circuit, one end of inductance L1 is divided into 5 tunnels, one end respectively with electric capacity C2, one end of electric capacity C3,
One end of electric capacity C4, one end of electric capacity C5, CAN communication circuit are connected, and the other end of electric capacity C2 is connected with one end of electric capacity C16,
The other end of electric capacity C3 is connected with one end of electric capacity C17, and the other end of electric capacity C4 is connected with one end of electric capacity C18, electric capacity C5's
The other end is connected with the other end of electric capacity C11, and the other end of inductance L1 is divided into 5 tunnels, one end respectively with electric capacity C6, electric capacity C7
One end, one end of electric capacity C8, one end of electrochemical capacitor C9, power source reverse connection protection circuit are connected, the other end of electric capacity C6 and electric capacity
One end of C12 is connected, and the other end of electric capacity C7 is connected with one end of electric capacity C13, one end of the other end of electric capacity C8 and electric capacity C14
Be connected, point solution electric capacity C9 the other end be divided into 9 tunnels respectively with ground, the other end of electric capacity C14, the other end of electric capacity C13, electric capacity
The other end of C12, the other end of electric capacity C11, the other end of electric capacity C18, the other end of electric capacity C17, the other end of electric capacity C16,
CAN communication circuit is connected.
In the power circuit, the RESET port of power supply chip is divided into 2 tunnels, respectively the RESET with MCU minimum system circuit
Port, one end of resistance R1 are connected, and the other end of resistance R1 is connected with 5v power supply, the DELAY port of power supply chip and electric capacity C10
One end be connected, the other end of electric capacity C10 ground connection, the VOUT port of power supply chip is divided into 2 tunnels, respectively with 5v power supply, electric capacity C15
One end be connected, the other end of electric capacity C15 is divided into 2 tunnels and is connected with the GND1 port of ground, power supply chip respectively, power supply chip
VIN port is divided into 2 tunnels, is connected with one end of power source reverse connection protection circuit, electric capacity C1 respectively, the other end ground connection of electric capacity C1, electricity
The EN port of source chip, is divided into the one end of 2 tunnels respectively with resistance R2, one end of resistance R3 and is connected, the other end of resistance R2 and electricity
Source reverse-connection protection circuit is connected, and the other end of resistance R3 is connected with CAN communication circuit, the GND2 port ground connection of power supply chip.
The CAN communication circuit is made up of secondary circuit one, secondary circuit two and connector, and one end of secondary circuit one is with MCU most
Mini system circuit is connected, and the CAN1 H port of the other end of secondary circuit one and connector, CAN1 L port are connected, secondary circuit two
One end is connected with MCU minimum system circuit, CAN2 H port, the CAN2 L port phase of the other end of secondary circuit two and connector
Even, the KL15 IN port of connector is divided into 2 tunnels and is connected with the KL15 OUT terminal mouth of EMC filter circuit, connector respectively, patches
The KL31 port of part is also connected with EMC filter circuit.
In the secondary circuit one, the BAT port of circuit chip one is connected with power source reverse connection protection circuit, circuit chip one
TXD port is divided into 2 tunnels and is connected with the TXD1 port of main circuit board in test point TP3, MCU minimum system circuit respectively, circuit core
The RXD port of piece one is divided into 2 tunnels and is connected with the RXD1 of main circuit board in test point TP2, MCU minimum system circuit respectively, circuit
The SCSN port of chip one is divided into the one end of 2 tunnels respectively with resistance R9, and one end of resistance R10 is connected, the other end of resistance R9 with
In MCU minimum system circuit, the TJA1145 SCSN1 port of main circuit board is connected, and the other end of resistance R10 and MCU minimum are
In system circuit, the TJA1051 S1 port of main circuit board is connected, and the SCK port of circuit chip one is main with MCU minimum system circuit
The TJA11475 CLK1 port of circuit board is connected, the SDO port of circuit chip one and main circuit board in MCU minimum system circuit
TJA1145 SOMI1 port be connected, the SDI port of circuit chip one is divided into 2 tunnels, one end respectively with resistance R13, resistance
One end of R14 is connected, and the other end of resistance R13 is connected with the TJA1145 SIMO1 of main circuit board in MCU minimum system circuit,
The other end of resistance R14 is connected with 5v power supply, and the VCC port of circuit chip one is connected with 5v power supply, the GND end of circuit chip one
Mouth ground connection, the WAKE port of circuit chip one is divided into the one end of 2 tunnels respectively with resistance R5, one end of resistance R8 and is connected, resistance R5
The other end be connected with 5v power supply, the other end of resistance R8 ground connection, the CANH port of circuit chip one is divided into 2 tunnels, respectively with survey
Pilot TP4,3 feet of common mode inductance L2 are connected, and 2 feet of common mode inductance L2 are divided into the one end of 5 tunnels respectively with resistance R6, electric capacity C19
One end, test point TP1,1 foot of electrostatic defending diode U4, connector CAN1 H port be connected, the other end of electric capacity C19
Ground connection, the other end of resistance R6 is connected with one end of resistance R7, and the other end of resistance R7 is divided into 2 tunnels respectively with electric capacity C21
End, one end of resistance R12 are connected, the other end ground connection of electric capacity C21, and the other end of resistance R12 is connected with one end of resistance R11,
The other end of resistance R11 is divided into 1 foot of 5 tunnels respectively with common mode inductance L2, one end of electric capacity C22, test point TP6, electrostatic defending
2 feet of diode U4, the CAN1 L port of connector are connected, the other end ground connection of electric capacity C22, and the 3 of electrostatic defending diode U4
Foot is grounded, and 4 feet of common mode inductance L2 are connected with the CANL port of test point TP5, circuit chip one, the VIO of circuit chip one
Port is connected with 5v power supply, and 5v power supply is grounded after being connected with electric capacity C20.
BAT port in the secondary circuit two in circuit chip two is connected with power source reverse connection protection circuit, circuit chip two
In TXD port be divided into two-way and be connected with the TXD2 of main circuit board in test point TP9, MCU minimum system circuit respectively, circuit core
The RXD port of piece two is divided into 2 tunnels and is connected with the RXD2 of main circuit board in test point TP8, MCU minimum system circuit respectively, circuit
The SCSN port of chip two is divided into the one end of 2 tunnels respectively with resistance R20, and one end of resistance R21 is connected, the other end of resistance R20
It is connected with the TJA1145 SCSN2 port of main circuit board in MCU minimum system circuit, the other end of resistance R21 and MCU are minimum
In circuit system, the TJA1051 S2 port of main circuit board is connected, in the SCK port of circuit chip two and MCU minimum system circuit
The TJA11475 CLK2 port of main circuit board is connected, the SDO port of circuit chip two and main circuit in MCU minimum system circuit
The TJA1145 SOMI2 port of plate is connected, and the SDI port of circuit chip two is divided into 2 tunnels, one end respectively with resistance R24, resistance
One end of R25 is connected, and the other end of resistance R24 is connected with the TJA1145 SIMO2 of main circuit board in MCU minimum system circuit,
The other end of resistance R25 is connected with 5v power supply, and the VCC port of circuit chip two is connected with 5v power supply, the GND end of circuit chip two
Mouthful ground connection, the EN PWR port of circuit chip two is connected with power circuit, the WAKE port of circuit chip two be divided into 2 tunnels respectively with
One end of resistance R16, one end of resistance R19 are connected, and the other end of resistance R16 is connected with 5v power supply, another termination of resistance R19
Ground, the CANH port of circuit chip one is divided into 2 tunnels, is connected with 3 feet of test point TP10, common mode inductance L3 respectively, common mode inductance
2 feet of L3 are divided into the one end of 5 tunnels respectively with resistance R17, one end of electric capacity C29, test point TP7, the 1 of electrostatic defending diode U6
Foot, the CAN2 H port of connector are connected, the other end of electric capacity C29 ground connection, one end of the other end of resistance R17 and resistance R18
It is connected, the other end of resistance R18 is divided into the one end of 2 tunnels respectively with electric capacity C31, one end of resistance R23 and is connected, and electric capacity C31's is another
One end is grounded, and the other end of resistance R23 is connected with one end of resistance R22, the other end of resistance R22 be divided into 5 tunnels respectively with common mode
1 foot of inductance L3, one end of electric capacity C32, test point TP12,2 feet of electrostatic defending diode U6, the CAN2 L port of connector
It is connected, the other end ground connection of electric capacity C32, the 3 feet ground connection of electrostatic defending diode U6,4 feet and the test point of common mode inductance L3
TP11, the CANL port of circuit chip two are connected, and the VIO port of circuit chip two is connected with 5v power supply, 5v power supply and electric capacity
It is grounded after C30 series connection.
The power source reverse connection protection circuit is made up of diode D1 and TVS diode D2, and the anode of diode D1 is filtered with EMC
Wave circuit is connected, and the negative electrode of diode D1 is divided into 3 tunnels, negative electrode respectively with TVS diode D2, power circuit, CAN communication circuit
It is connected, the plus earth of TVS diode D2.
In the temperature retrieval circuit one end of electric capacity C37 be divided into the one end of 4 tunnels respectively with resistance R26, the one of resistance R27
End, one end of critesistor NTC1, the MCU Temp port of main circuit board is connected in MCU minimum system circuit, and resistance R26's is another
One end is connected with the AVCC port of main circuit board in MCU minimum system circuit, and the other end of critesistor NTC1 is divided into 3 tunnels respectively
It is connected with the other end of ground, the other end of resistance R27, electric capacity C37.
The auspicious Sa RH850F1K series of the model of the main circuit board.
Model TPS7B6750QPWPR of the power supply chip.
The connector is TJA1145 chip.
The present invention compared with prior art, monitors the temperature information in whole circuit using temperature sensing circuit, while setting
Power source reverse connection protection circuit is counted, it is therefore prevented that impact failure of the voltage to gateway hardware circuit, the present invention is to whole gateway circuit
Carry out integrated and improved so as to easily can apply in various types of automobiles.
Description of the drawings
Fig. 1 is the MCU minimum system circuit in the present invention.
Fig. 2 is the EMC filter circuit in the present invention.
Fig. 3 is the power circuit in the present invention.
Fig. 4 is the CAN communication circuit in the present invention.
Fig. 5 is the power source reverse connection protection circuit in the present invention.
Fig. 6 is the temperature sensing circuit in the present invention.
Fig. 7 is link schematic diagram of the present invention in being embodied as.
Specific embodiment
In conjunction with accompanying drawing, the present invention is described further.
Referring to Fig. 1 ~ Fig. 7, the present invention devises a kind of CANFD gateway circuit for electric power steering, including：MCU
Minimum system circuit, EMC filter circuit, power circuit, CAN communication circuit, power source reverse connection protection circuit, temperature sensing circuit,
MCU minimum system circuit is connected with power circuit, temperature sensing circuit, CAN communication circuit respectively, and power circuit is divided into 2 tunnels again
It is connected with CAN communication circuit, power source reverse connection protection circuit respectively, power source reverse connection protection circuit is also led to EMC filter circuit, CAN
News circuit is connected, and EMC filter circuit is connected with CAN communication circuit.
In the present invention, MCU minimum system circuit is by main circuit board, crystal oscillating circuit, MCU debugging interface circuit and power filter
Circuit constitute, the JP0 TDI of the wherein main circuit board of main circuit board, JP1 TDO, JP2 TCK, JP5 TRDY port respectively with
MCU debugging interface circuit is connected, and EVCC, AVCC port of main circuit board is connected to electric source filter circuit, main circuit board
X1, X2 port is connected with crystal oscillating circuit, the RESET interface of main circuit board be divided into 2 tunnels respectively with power circuit, MCU debugging interface
Circuit is connected, TXD1, RXD1, TXD2, RXD2, TJA1145 SOMI1, TJA1145 SIMO1, TJA1145 of main circuit board
CLK1、TJA1145 SCSN1、TJA1051 S1、TJA1051 S2、TJA1145 SCSN2、TJA1145 SIMO2、TJA1145
CLK2, TJA1145 SOMI2 port is connected with CAN communication circuit, the MCUTemp port of main circuit board and temperature sensing circuit phase
Even, the AWOVSS port of main circuit board is divided into 2 tunnels and is connected with the one end on ground, electric capacity C34 respectively, and the other end of electric capacity C34 is then
It is connected with the AWOVAL port of main circuit board, the EVSS port ground connection of main circuit board, the A0VSS port of main circuit board is also grounded,
The ISOVSS port of main circuit board is divided into 2 tunnels and is connected with the one end on ground, electric capacity C33 respectively, the other end of electric capacity C33 and main electricity
The ISOVCL port of road plate is connected, and the FLMD0 of main circuit board is divided into the one end of 2 tunnels respectively with resistance R4, MCU debugging interface circuit
It is connected, the other end ground connection of resistance R4.
In the present invention, crystal oscillating circuit is made up of electric capacity C35, electric capacity C36 and crystal oscillator Y1, and one end of crystal oscillator Y1 is divided into 2 tunnels respectively
One end of X2 port, electric capacity C35 with main circuit board is connected, and the other end of crystal oscillator Y1 is divided into X1 of 2 tunnels respectively with main circuit board
Port, one end of electric capacity C36 are connected, and the other end of electric capacity C35 is connected with the other end of electric capacity C36 and is grounded.
The JP2 TCK end of the TCK/FPCK port of the debugging circuit board in the MCU debugging interface circuit and main circuit board
Mouth is connected, and the TDO/FPDT port of debugging circuit board is connected with the JP1 TDO port of main circuit board, the TDI/ of debugging circuit board
FPDT port is divided into JP0 TDI port of 2 tunnels respectively with main circuit board, one end of reserved resistance R15 and is connected, reserved resistance R15
Other end ground connection, the RDY port of debugging circuit board is connected with the JP5 TRDY port of main circuit board, debugging circuit board
RESET port is connected with the RESET port of main circuit board, the GND port ground connection of debugging circuit board, the FLMD0 of debugging circuit board
Port is connected with the FLMD0 port of main circuit board, and the vdd terminal mouth of debugging circuit board is connected with 5v power supply.
In the present invention in electric source filter circuit AVCC port be divided into AVCC port of 9 tunnels respectively with main circuit board, 5v power supply,
One end of electric capacity C23, the EVCC port of main circuit board, one end of electric capacity C26, one end of electric capacity C27, one end of electric capacity C28, electricity
Hold one end of C24, one end of electric capacity C25 is connected, and the other end of electric capacity C23 is connected with ground, and the other end of electric capacity C26 is divided into 5
Road respectively with ground, the other end of electric capacity C27, the other end of electric capacity C28, the other end of electric capacity C24, the other end of electric capacity C25
It is connected.
In the present invention, in EMC filter circuit, one end of inductance L1 is divided into 5 tunnels, one end respectively with electric capacity C2, electric capacity C3
One end, one end of electric capacity C4, one end of electric capacity C5, CAN communication circuit are connected, one end of the other end of electric capacity C2 and electric capacity C16
It is connected, the other end of electric capacity C3 is connected with one end of electric capacity C17, and the other end of electric capacity C4 is connected with one end of electric capacity C18, electric capacity
The other end of C5 is connected with the other end of electric capacity C11, and the other end of inductance L1 is divided into 5 tunnels, one end respectively with electric capacity C6, electric capacity
One end of C7, one end of electric capacity C8, one end of electrochemical capacitor C9, power source reverse connection protection circuit be connected, the other end of electric capacity C6 with
One end of electric capacity C12 is connected, and the other end of electric capacity C7 is connected with one end of electric capacity C13, and the other end of electric capacity C8 is with electric capacity C14's
One end be connected, point solution electric capacity C9 the other end be divided into 9 tunnels respectively with ground, the other end of electric capacity C14, the other end of electric capacity C13,
The other end of electric capacity C12, the other end of electric capacity C11, the other end of electric capacity C18, the other end of electric capacity C17, electric capacity C16 another
End, CAN communication circuit are connected.
In the power circuit, the RESET port of power supply chip is divided into 2 tunnels, respectively the RESET with MCU minimum system circuit
Port, one end of resistance R1 are connected, and the other end of resistance R1 is connected with 5v power supply, the DELAY port of power supply chip and electric capacity C10
One end be connected, the other end of electric capacity C10 ground connection, the VOUT port of power supply chip is divided into 2 tunnels, respectively with 5v power supply, electric capacity C15
One end be connected, the other end of electric capacity C15 is divided into 2 tunnels and is connected with the GND1 port of ground, power supply chip respectively, power supply chip
VIN port is divided into 2 tunnels, is connected with one end of power source reverse connection protection circuit, electric capacity C1 respectively, the other end ground connection of electric capacity C1, electricity
The EN port of source chip, is divided into the one end of 2 tunnels respectively with resistance R2, one end of resistance R3 and is connected, the other end of resistance R2 and electricity
Source reverse-connection protection circuit is connected, and the other end of resistance R3 is connected with CAN communication circuit, the GND2 port ground connection of power supply chip.
The CAN communication circuit is made up of secondary circuit one, secondary circuit two and connector, and one end of secondary circuit one is with MCU most
Mini system circuit is connected, and the CAN1 H port of the other end of secondary circuit one and connector, CAN1 L port are connected, secondary circuit two
One end is connected with MCU minimum system circuit, CAN2 H port, the CAN2 L port phase of the other end of secondary circuit two and connector
Even, the KL15 IN port of connector is divided into 2 tunnels and is connected with the KL15 OUT terminal mouth of EMC filter circuit, connector respectively, patches
The KL31 port of part is also connected with EMC filter circuit.
In the present invention, in secondary circuit one, the BAT port of circuit chip one is connected with power source reverse connection protection circuit, circuit chip
One TXD port is divided into 2 tunnels and is connected with the TXD1 port of main circuit board in test point TP3, MCU minimum system circuit respectively, electricity
The RXD port of road chip one is divided into 2 tunnels and is connected with the RXD1 of main circuit board in test point TP2, MCU minimum system circuit respectively,
The SCSN port of circuit chip one is divided into the one end of 2 tunnels respectively with resistance R9, and one end of resistance R10 is connected, and resistance R9's is another
End is connected with the TJA1145 SCSN1 port of main circuit board in MCU minimum system circuit, and the other end of resistance R10 is with MCU most
In mini system circuit, the TJA1051 S1 port of main circuit board is connected, the SCK port of circuit chip one and MCU minimum system circuit
The TJA11475 CLK1 port of middle main circuit board is connected, the SDO port of circuit chip one and main electricity in MCU minimum system circuit
The TJA1145 SOMI1 port of road plate is connected, and the SDI port of circuit chip one is divided into 2 tunnels, one end respectively with resistance R13, electricity
One end of resistance R14 is connected, the TJA1145 SIMO1 phase of the other end of resistance R13 and main circuit board in MCU minimum system circuit
Even, the other end of resistance R14 is connected with 5v power supply, and the VCC port of circuit chip one is connected with 5v power supply, circuit chip one
GND port is grounded, and the WAKE port of circuit chip one is divided into the one end of 2 tunnels respectively with resistance R5, one end of resistance R8 and is connected, electricity
The other end of resistance R5 is connected with 5v power supply, the other end ground connection of resistance R8, and the CANH port of circuit chip one is divided into 2 tunnels, respectively
It is connected with 3 feet of test point TP4, common mode inductance L2,2 feet of common mode inductance L2 are divided into the one end of 5 tunnels respectively with resistance R6, electric capacity
One end of C19, test point TP1,1 foot of electrostatic defending diode U4, the CAN1 H port of connector are connected, and electric capacity C19's is another
One end is grounded, and the other end of resistance R6 is connected with one end of resistance R7, the other end of resistance R7 be divided into 2 tunnels respectively with electric capacity C21
One end, one end of resistance R12 be connected, the other end of electric capacity C21 ground connection, one end phase of the other end of resistance R12 and resistance R11
Even, the other end of resistance R11 is divided into 1 foot of 5 tunnels respectively with common mode inductance L2, one end of electric capacity C22, test point TP6, electrostatic and prevents
2 feet of shield diode U4, the CAN1 L port of connector are connected, the other end ground connection of electric capacity C22, electrostatic defending diode U4's
3 feet are grounded, and 4 feet of common mode inductance L2 are connected with the CANL port of test point TP5, circuit chip one, the VIO of circuit chip one
Port is connected with 5v power supply, and 5v power supply is grounded after being connected with electric capacity C20.
BAT port in the present invention in secondary circuit two in circuit chip two is connected with power source reverse connection protection circuit, circuit core
TXD port in piece two is divided into two-way and is connected with the TXD2 of main circuit board in test point TP9, MCU minimum system circuit respectively, electricity
The RXD port of road chip two is divided into 2 tunnels and is connected with the RXD2 of main circuit board in test point TP8, MCU minimum system circuit respectively,
The SCSN port of circuit chip two is divided into the one end of 2 tunnels respectively with resistance R20, and one end of resistance R21 is connected, and resistance R20's is another
One end is connected with the TJA1145 SCSN2 port of main circuit board in MCU minimum system circuit, the other end of resistance R21 and MCU
In minimum system circuit, the TJA1051 S2 port of main circuit board is connected, and the SCK port of circuit chip two and MCU minimum system are electric
In road, the TJA11475 CLK2 port of main circuit board is connected, and the SDO port of circuit chip two is main with MCU minimum system circuit
The TJA1145 SOMI2 port of circuit board is connected, and the SDI port of circuit chip two is divided into 2 tunnels, one end respectively with resistance R24,
One end of resistance R25 is connected, the TJA1145 SIMO2 phase of the other end of resistance R24 and main circuit board in MCU minimum system circuit
Even, the other end of resistance R25 is connected with 5v power supply, and the VCC port of circuit chip two is connected with 5v power supply, circuit chip two
GND port is grounded, and the EN PWR port of circuit chip two is connected with power circuit, and the WAKE port of circuit chip two is divided into 2 tunnels
One end respectively with resistance R16, one end of resistance R19 are connected, and the other end of resistance R16 is connected with 5v power supply, and resistance R19's is another
One end is grounded, and the CANH port of circuit chip one is divided into 2 tunnels, is connected with 3 feet of test point TP10, common mode inductance L3 respectively, altogether
2 feet of mould inductance L3 are divided into the one end of 5 tunnels respectively with resistance R17, one end of electric capacity C29, test point TP7, two pole of electrostatic defending
1 foot of pipe U6, the CAN2 H port of connector are connected, the other end of electric capacity C29 ground connection, the other end of resistance R17 and resistance R18
One end be connected, the other end of resistance R18 is divided into the one end of 2 tunnels respectively with electric capacity C31, one end of resistance R23 and is connected, electric capacity
The other end ground connection of C31, the other end of resistance R23 is connected with one end of resistance R22, and the other end of resistance R22 is divided into 5 tunnels respectively
1 foot, one end of electric capacity C32, test point TP12 with common mode inductance L3,2 feet of electrostatic defending diode U6, the CAN2 of connector
L port is connected, the other end ground connection of electric capacity C32, the 3 feet ground connection of electrostatic defending diode U6,4 feet and the test of common mode inductance L3
Point TP11, the CANL port of circuit chip two are connected, and the VIO port of circuit chip two is connected with 5v power supply, 5v power supply and electricity
It is grounded after holding C30 series connection.
In the present invention, power source reverse connection protection circuit is made up of diode D1 and TVS diode D2, the anode of diode D1 with
EMC filter circuit is connected, and the negative electrode of diode D1 is divided into 3 tunnels, and negative electrode respectively with TVS diode D2, power circuit, CAN lead to
News circuit is connected, the plus earth of TVS diode D2.
In the present invention, in temperature retrieval circuit, one end of electric capacity C37 is divided into the one end of 4 tunnels respectively with resistance R26, resistance R27
One end, one end of critesistor NTC1, the MCU Temp port of main circuit board is connected in MCU minimum system circuit, resistance R26
The other end be connected with the AVCC port of main circuit board in MCU minimum system circuit, the other end of critesistor NTC1 is divided into 3 tunnels
It is connected with the other end of ground, the other end of resistance R27, electric capacity C37 respectively.
The auspicious Sa RH850F1K series of the model of main circuit board in the present invention, safe class is that ASILB, highest dominant frequency is
120MHz, with 6 CAN passages, supports CANFD function, highest communication speed up to 5Mbps, AD sampling precision 12bit, and
And with hardware security module（HSM）.
Model TPS7B6750QPWPR of power supply chip in the present invention, highest can bear the voltage of 40v, and maximum output is
450mA electric current, and stable 5v voltage can be provided when input voltage is for 6v ~ 18v, while protecting with Thermal shutdown and short circuit
Protective function.
In the present invention, connector is that TJA1145 chip, communication speed reaches as high as 2Mbuad, and with less electromagnetism
Radiation and higher anti-electromagnetic interference capability.
Referring to Fig. 7, in being embodied as, it is divided into the sending signal i.e. EPS controller 5 of conversion and passes the signal along to car load 6, connects
A number conversion of collecting mail is that car load 6 passes the signal along to EPS controller 5.
The step of sending signal is changed is as follows：
EPS controller 5 sends signal first, and signal is sent to EPS master chip 7, EPS master chip 7 through bus transceiver A4-1 and connects
The collection of letters number is simultaneously adjusted, and then with bus transceiver B4-2, the EPS signal after adjustment is sent to the present invention through debugging interface 3
1, and the EPS signal after debugging is fed back to EPS master chip 7 by debugging interface 3 simultaneously, and the present invention 1 is connected with power module 2,
The present invention 1 startup power supply is adjusted to EPS signal after receiving EPS signal, by the EPS signal transmission after adjustment to car load
6 simultaneously while feed back to debugging interface 3 by EPS signal.
Receive as follows the step of signal is changed：
Car load 6 sends car load signal first, and car load signal is sent to EPS master chip 7 through the present invention 1 and bus transceiver B4-2,
Car load signal is transferred again to debugging interface 3 and bus transceiver A4-1 by EPS master chip 7, and car load signal is entered by debugging interface 3
Row debugging, and the car load signal after debugging is sent to the present invention 1 and EPS master chip 7, the present invention 1 is received and is received and dispatched by bus
After the car load signal that device A4-1 is transmitted with debugging interface 3, power supply signal is transmitted to power module 2, then by car load signal transmission
To EPS controller 5.
Claims (15)
1. a kind of CANFD gateway circuit for electric power steering, including：MCU minimum system circuit, EMC filter circuit, electricity
Source circuit, CAN communication circuit, power source reverse connection protection circuit, temperature sensing circuit, it is characterised in that：MCU minimum system circuit divides
Be not connected with power circuit, temperature sensing circuit, CAN communication circuit, power circuit be divided into again 2 tunnels respectively with CAN communication circuit,
Power source reverse connection protection circuit is connected, and power source reverse connection protection circuit is also connected with EMC filter circuit, CAN communication circuit, and EMC is filtered
Circuit is connected with CAN communication circuit.
2. a kind of CANFD gateway circuit for electric power steering according to claim 1, it is characterised in that：Described
MCU minimum system circuit is made up of main circuit board, crystal oscillating circuit, MCU debugging interface circuit and electric source filter circuit, main circuit board
The JP0 TDI of wherein main circuit board, JP1 TDO, JP2 TCK, JP5 TRDY port respectively with MCU debugging interface circuit phase
Even, EVCC, AVCC port of main circuit board is connected to electric source filter circuit, X1, X2 port of main circuit board and crystal oscillator electricity
Road is connected, and the RESET interface of main circuit board is divided into 2 tunnels and is connected with power circuit, MCU debugging interface circuit respectively, main circuit board
TXD1, RXD1, TXD2, RXD2, TJA1145 SOMI1, TJA1145 SIMO1, TJA1145 CLK1, TJA1145 SCSN1,
TJA1051 S1、TJA1051 S2、TJA1145 SCSN2、TJA1145 SIMO2、TJA1145 CLK2、TJA1145 SOMI2
Port is connected with CAN communication circuit, and the MCUTemp port of main circuit board is connected with temperature sensing circuit, main circuit board
AWOVSS port is divided into 2 tunnels and is connected with the one end on ground, electric capacity C34 respectively, the other end of electric capacity C34 then with main circuit board
AWOVAL port is connected, the EVSS port ground connection of main circuit board, and the A0VSS port of main circuit board is also grounded, main circuit board
ISOVSS port is divided into 2 tunnels and is connected with the one end on ground, electric capacity C33 respectively, the other end of electric capacity C33 and main circuit board
ISOVCL port is connected, and the FLMD0 of main circuit board is divided into the one end of 2 tunnels respectively with resistance R4, MCU debugging interface circuit and is connected,
The other end ground connection of resistance R4.
3. a kind of CANFD gateway circuit for electric power steering according to claim 2, it is characterised in that：Described
Crystal oscillating circuit is made up of electric capacity C35, electric capacity C36 and crystal oscillator Y1, and one end of crystal oscillator Y1 is divided into X2 end of 2 tunnels respectively with main circuit board
Mouthful, one end of electric capacity C35 be connected, the other end of crystal oscillator Y1 be divided into X1 port of 2 tunnels respectively with main circuit board, the one of electric capacity C36
End is connected, and the other end of electric capacity C35 is connected with the other end of electric capacity C36 and is grounded.
4. a kind of CANFD gateway circuit for electric power steering according to claim 2, it is characterised in that：Described
The TCK/FPCK port of the debugging circuit board in MCU debugging interface circuit is connected with the JP2 TCK port of main circuit board, debugging electricity
The TDO/FPDT port of road plate is connected with the JP1 TDO port of main circuit board, and the TDI/FPDT port of debugging circuit board is divided into 2 tunnels
JP0 TDI port respectively with main circuit board, one end of reserved resistance R15 are connected, the other end ground connection of reserved resistance R15, adjust
The RDY port of examination circuit board is connected with the JP5 TRDY port of main circuit board, RESET port and the main circuit board of debugging circuit board
RESET port be connected, the GND port of debugging circuit board ground connection, FLMD0 port and the main circuit board of debugging circuit board
FLMD0 port is connected, and the vdd terminal mouth of debugging circuit board is connected with 5v power supply.
5. a kind of CANFD gateway circuit for electric power steering according to claim 2, it is characterised in that：Described
In electric source filter circuit, AVCC port is divided into AVCC port of 9 tunnels respectively with main circuit board, 5v power supply, one end of electric capacity C23, master
The EVCC port of circuit board, one end of electric capacity C26, one end of electric capacity C27, one end of electric capacity C28, one end of electric capacity C24, electric capacity
One end of C25 is connected, and the other end of electric capacity C23 is connected with ground, the other end of electric capacity C26 be divided into 5 tunnels respectively with ground, electric capacity
The other end of C27, the other end of electric capacity C28, the other end of electric capacity C24, the other end of electric capacity C25 are connected.
6. a kind of CANFD gateway circuit for electric power steering according to claim 1, it is characterised in that：Described
In EMC filter circuit, one end of inductance L1 is divided into 5 tunnels, one end respectively with electric capacity C2, one end of electric capacity C3, the one of electric capacity C4
End, one end of electric capacity C5, CAN communication circuit are connected, and the other end of electric capacity C2 is connected with one end of electric capacity C16, and electric capacity C3's is another
One end is connected with one end of electric capacity C17, and the other end of electric capacity C4 is connected with one end of electric capacity C18, the other end of electric capacity C5 and electricity
The other end for holding C11 is connected, and the other end of inductance L1 is divided into 5 tunnels, one end respectively with electric capacity C6, one end of electric capacity C7, electric capacity
One end of C8, one end of electrochemical capacitor C9, power source reverse connection protection circuit are connected, one end of the other end of electric capacity C6 and electric capacity C12
It is connected, the other end of electric capacity C7 is connected with one end of electric capacity C13, and the other end of electric capacity C8 is connected with one end of electric capacity C14, point solution
The other end of electric capacity C9 be divided into 9 tunnels respectively with ground, the other end of electric capacity C14, the other end of electric capacity C13, electric capacity C12 another
End, the other end of electric capacity C11, the other end of electric capacity C18, the other end of electric capacity C17, the other end of electric capacity C16, CAN communication electricity
Road is connected.
7. a kind of CANFD gateway circuit for electric power steering according to claim 1, it is characterised in that：Described
In power circuit, the RESET port of power supply chip is divided into 2 tunnels, RESET port respectively with MCU minimum system circuit, resistance R1
One end be connected, the other end of resistance R1 is connected with 5v power supply, and the DELAY port of power supply chip is connected with one end of electric capacity C10,
The other end ground connection of electric capacity C10, the VOUT port of power supply chip is divided into 2 tunnels, is connected with one end of 5v power supply, electric capacity C15 respectively,
The other end of electric capacity C15 is divided into 2 tunnels and is connected with the GND1 port of ground, power supply chip respectively, and the VIN port of power supply chip is divided into
2 tunnels, are connected with one end of power source reverse connection protection circuit, electric capacity C1 respectively, the other end ground connection of electric capacity C1, the EN end of power supply chip
Mouthful, it is divided into the one end of 2 tunnels respectively with resistance R2, one end of resistance R3 and is connected, the other end of resistance R2 and reverse power connection protection are electric
Road is connected, and the other end of resistance R3 is connected with CAN communication circuit, the GND2 port ground connection of power supply chip.
8. a kind of CANFD gateway circuit for electric power steering according to claim 1, it is characterised in that：Described
CAN communication circuit is made up of secondary circuit one, secondary circuit two and connector, one end of secondary circuit one and MCU minimum system circuit phase
Even, the CAN1 H port of the other end of secondary circuit one and connector, CAN1 L port are connected, and one end of secondary circuit two is with MCU most
Mini system circuit is connected, and the CAN2 H port of the other end of secondary circuit two and connector, CAN2 L port are connected, connector
KL15 IN port is divided into 2 tunnels and is connected with the KL15 OUT terminal mouth of EMC filter circuit, connector respectively, the KL31 port of connector
Also it is connected with EMC filter circuit.
9. a kind of CANFD gateway circuit for electric power steering according to claim 8, it is characterised in that：Described
In secondary circuit one, the BAT port of circuit chip one is connected with power source reverse connection protection circuit, and the TXD port of circuit chip one is divided into 2
Road is connected with the TXD1 port of main circuit board in test point TP3, MCU minimum system circuit respectively, the RXD port of circuit chip one
It is divided into 2 tunnels to be connected with the RXD1 of main circuit board in test point TP2, MCU minimum system circuit respectively, the SCSN end of circuit chip one
Mouth is divided into the one end of 2 tunnels respectively with resistance R9, and one end of resistance R10 is connected, the other end of resistance R9 and MCU minimum system circuit
The TJA1145 SCSN1 port of middle main circuit board is connected, the other end of resistance R10 and main circuit board in MCU minimum system circuit
TJA1051 S1 port be connected, the TJA11475 of the SCK port of circuit chip one and main circuit board in MCU minimum system circuit
CLK1 port is connected, the TJA1145 SOMI1 end of the SDO port of circuit chip one and main circuit board in MCU minimum system circuit
Mouth is connected, and the SDI port of circuit chip one is divided into 2 tunnels, and one end respectively with resistance R13, one end of resistance R14 are connected, resistance
The other end of R13 is connected with the TJA1145 SIMO1 of main circuit board in MCU minimum system circuit, the other end of resistance R14 and 5v
Power supply is connected, and the VCC port of circuit chip one is connected with 5v power supply, the GND port ground connection of circuit chip one, circuit chip one
WAKE port is divided into the one end of 2 tunnels respectively with resistance R5, one end of resistance R8 and is connected, the other end of resistance R5 and 5v power supply phase
Even, the other end ground connection of resistance R8, the CANH port of circuit chip one is divided into 2 tunnels, respectively with test point TP4, common mode inductance L2
3 feet be connected, 2 feet of common mode inductance L2 are divided into the one end of 5 tunnels respectively with resistance R6, one end of electric capacity C19, test point TP1, quiet
1 foot of electricity protection diode U4, the CAN1 H port of connector are connected, the other end ground connection of electric capacity C19, the other end of resistance R6
It is connected with one end of resistance R7, the other end of resistance R7 is divided into one end phase of the one end of 2 tunnels respectively with electric capacity C21, resistance R12
Even, the other end ground connection of electric capacity C21, the other end of resistance R12 is connected with one end of resistance R11, and the other end of resistance R11 is divided into
5 tunnels 1 foot respectively with common mode inductance L2, one end of electric capacity C22, test point TP6,2 feet of electrostatic defending diode U4, connector
CAN1 L port be connected, the other end of electric capacity C22 ground connection, the 3 feet ground connection of electrostatic defending diode U4, the 4 of common mode inductance L2
Foot is connected with the CANL port of test point TP5, circuit chip one, and the VIO port of circuit chip one is connected with 5v power supply, 5v electricity
Source is grounded after being connected with electric capacity C20.
10. a kind of CANFD gateway circuit for electric power steering according to claim 8, it is characterised in that：Described
BAT port in secondary circuit two in circuit chip two is connected with power source reverse connection protection circuit, and the TXD port in circuit chip two is divided
It is connected with the TXD2 of main circuit board in test point TP9, MCU minimum system circuit for two-way respectively, the RXD port of circuit chip two
It is divided into 2 tunnels to be connected with the RXD2 of main circuit board in test point TP8, MCU minimum system circuit respectively, the SCSN end of circuit chip two
Mouth is divided into the one end of 2 tunnels respectively with resistance R20, and one end of resistance R21 is connected, and the other end of resistance R20 and MCU minimum system are electric
In road, the TJA1145 SCSN2 port of main circuit board is connected, the other end of resistance R21 and main circuit in MCU minimum system circuit
The TJA1051 S2 port of plate is connected, the SCK port of circuit chip two and main circuit board in MCU minimum system circuit
TJA11475 CLK2 port is connected, the TJA1145 of the SDO port of circuit chip two and main circuit board in MCU minimum system circuit
SOMI2 port is connected, and the SDI port of circuit chip two is divided into 2 tunnels, one end respectively with resistance R24, one end phase of resistance R25
Even, the other end of resistance R24 is connected with the TJA1145 SIMO2 of main circuit board in MCU minimum system circuit, and resistance R25's is another
One end is connected with 5v power supply, and the VCC port of circuit chip two is connected with 5v power supply, the GND port ground connection of circuit chip two, circuit
The EN PWR port of chip two is connected with power circuit, and the WAKE port of circuit chip two is divided into 2 tunnels respectively with resistance R16
End, one end of resistance R19 are connected, and the other end of resistance R16 is connected with 5v power supply, the other end ground connection of resistance R19, circuit chip
One CANH port is divided into 2 tunnels, is connected with 3 feet of test point TP10, common mode inductance L3 respectively, and 2 feet of common mode inductance L3 are divided into 5
Road one end respectively with resistance R17, one end of electric capacity C29, test point TP7,1 foot of electrostatic defending diode U6, connector
CAN2 H port is connected, the other end ground connection of electric capacity C29, and the other end of resistance R17 is connected with one end of resistance R18, resistance R18
The other end be divided into the one end of 2 tunnels respectively with electric capacity C31, one end of resistance R23 and be connected, the other end ground connection of electric capacity C31, resistance
The other end of R23 is connected with one end of resistance R22, and the other end of resistance R22 is divided into 1 foot of 5 tunnels respectively with common mode inductance L3, electricity
One end of appearance C32, test point TP12,2 feet of electrostatic defending diode U6, the CAN2 L port of connector are connected, electric capacity C32's
The other end is grounded, 3 feet of electrostatic defending diode U6 ground connection, 4 feet of common mode inductance L3 and test point TP11, circuit chip two
CANL port is connected, and the VIO port of circuit chip two is connected with 5v power supply, and 5v power supply is grounded after being connected with electric capacity C30.
A kind of 11. CANFD gateway circuits for electric power steering according to claim 1, it is characterised in that：Described
Power source reverse connection protection circuit is made up of diode D1 and TVS diode D2, and the anode of diode D1 is connected with EMC filter circuit,
The negative electrode of diode D1 is divided into 3 tunnels, and negative electrode respectively with TVS diode D2, power circuit, CAN communication circuit are connected, TVS bis-
The plus earth of pole pipe D2.
A kind of 12. CANFD gateway circuits for electric power steering according to claim 1, it is characterised in that：Described
In temperature retrieval circuit, one end of electric capacity C37 is divided into the one end of 4 tunnels respectively with resistance R26, one end of resistance R27, critesistor
In one end of NTC1, MCU minimum system circuit, the MCU Temp port of main circuit board is connected, and the other end of resistance R26 is with MCU most
In mini system circuit, the AVCC port of main circuit board is connected, the other end of critesistor NTC1 be divided into 3 tunnels respectively with ground, resistance
The other end of R27, the other end of electric capacity C37 are connected.
A kind of 13. CANFD gateway circuits for electric power steering according to claim 2, it is characterised in that：Described
The auspicious Sa RH850F1K series of the model of main circuit board.
A kind of 14. CANFD gateway circuits for electric power steering according to claim 7, it is characterised in that：Described
Model TPS7B6750QPWPR of power supply chip.
A kind of 15. CANFD gateway circuits for electric power steering according to claim 8, it is characterised in that：Described
Connector is TJA1145 chip.
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|---|---|---|---|
| CN201610977979.7A CN106427836B (en) | 2016-11-08 | 2016-11-08 | A kind of CANFD gateway circuit for electric power steering |
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|---|---|---|---|
| CN201610977979.7A CN106427836B (en) | 2016-11-08 | 2016-11-08 | A kind of CANFD gateway circuit for electric power steering |
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| CN204241944U (en) * | 2014-11-28 | 2015-04-01 | 温州大学 | A kind of power system state monitoring apparatus for electronic aeromodelling aerocraft |
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| CN205647566U (en) * | 2016-04-26 | 2016-10-12 | 北京经纬恒润科技有限公司 | Controller area network gateway |
| CN206264963U (en) * | 2016-11-08 | 2017-06-20 | 博世华域转向系统有限公司 | A kind of CANFD gateway circuits for electric power steering |
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2016
- 2016-11-08 CN CN201610977979.7A patent/CN106427836B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015135911A1 (en) * | 2014-03-11 | 2015-09-17 | Zaptec Ip As | Power supply system for charging electric vehicles |
| CN204241944U (en) * | 2014-11-28 | 2015-04-01 | 温州大学 | A kind of power system state monitoring apparatus for electronic aeromodelling aerocraft |
| CN204719192U (en) * | 2015-05-05 | 2015-10-21 | 杭州标源微电子有限公司 | A kind of single lithium battery charging management chip failure detector circuit |
| CN205647566U (en) * | 2016-04-26 | 2016-10-12 | 北京经纬恒润科技有限公司 | Controller area network gateway |
| CN206264963U (en) * | 2016-11-08 | 2017-06-20 | 博世华域转向系统有限公司 | A kind of CANFD gateway circuits for electric power steering |
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