CN101285523A - Electric control system for stepless speed transmission for automobile - Google Patents
Electric control system for stepless speed transmission for automobile Download PDFInfo
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Abstract
The invention relates to a transmission electric control system, which is an automobile non-stage transmission electric control system and comprises a TMS320LF2812 DSP controller, a power supply circuit, a pulse input circuit, a read analog input circuit, a read digital input circuit, a pulse output circuit, a digital output circuit, a CAN interface circuit and an SCI interface circuit. The automobile non-stage transmission electric control system adopts a TI high-performance DSP control chip which has abundant on-chip resources and interfaces and stronger data processing capacity than an ordinary 16 bit singlechip; an advanced integrated circuit technology and high-standard devices are adopted to ensure that the product is suitable to be used under various bad operating conditions such as wide temperature range, high humidity, dust, severe vibration and strong electromagnetic interference; moreover, modularized design is adopted to increase the efficiency and the quality of hardware design, shorten development time and reduce development cost.
Description
Technical field
The invention belongs to automotive field, relate to a kind of speed changer automatical control system, specifically electric control system for stepless speed transmission for automobile.
Background technique
The stepless change transmission has the incomparable advantage of conventional speed change transmission.Since stepless change transmission (CVT) with have grade transmission that the difference of principle is arranged, by the continuous variation of ECU (Electrical Control Unit) control speed ratio, the jump of speed ratio in the time of the gear shift of MT can not occurring, so passenger's just steady acceleration of automobile of feeling, and can not feel shifting shock.The maneuverability of automobile is simplified greatly, reduced driver's labor intensity.The electric controlling stepless variable speed system bring velocity ratio, speed and moment of torsion faster, more accurate control, guarantee motor and speed changer better matching, different driving modes is provided, for example sports type, economical and Ruiss Controll, thus make the user obtain omnibearing " enjoyment of travelling ".Automatical control system is the important component part of CVT, has the people to liken it brain of CVT to visually.Automatical control system is by the state of a series of sensor monitoring system, and the status information that system is current is passed to electronic control single (TCU), the intention that TCU comes identification of driver according to the information that obtains, the operating conditions of judgement system, and send control corresponding by a series of algorithm and instruct, output to system is revised, and system is moved by certain mode.There is huge sale of automobile market in our country, automotive industry is one of national industry of China, yet China to the research of CVT speed changer owing to start late, though as the Xi Yena of the A6 of Audi, Guangzhou Honda degree of flying, FIAT with send the homemade vehicle tops such as flag cloud of Leo, Cherry to use the CVT speed changer, all rely on external import.
Summary of the invention
The objective of the invention is to propose the electric control system for stepless speed transmission for automobile of a kind of high-performance, high reliability and reusability.
Purpose of the present invention can be achieved through the following technical solutions:
Electric control system for stepless speed transmission for automobile comprises TMS320LF2812 dsp controller, power supply circuits, pulse input circuit, simulated measurement input circuit, digital quantity input circlult, impulse output circuit, digital quantity output circuit, CAN interface circuit and SCI interface circuit;
The power module of the output termination TMS320LF2812 dsp controller of power supply circuits;
The output terminal of the input termination engine load sensor of pulse input circuit, engine rotation speed sensor, CVT driving disc speed probe and CVT driven disc speed probe, the capture module of the output termination TMS320LF2812 dsp controller of pulse input circuit;
The input termination slave cylinder oil pressure sensor of simulated measurement input circuit and the output terminal of oil temperature sensor, the A/D module of the output termination TMS320LF2812 dsp controller of simulated measurement input circuit;
The output terminal of the input termination gear selector of digital quantity input circlult, system's power on signal device, brake petal switch and mode selector, the I/O module of the output termination TMS320LF2812 dsp controller of digital quantity input circlult;
The PWM module of the input termination TMS320LF2812 dsp controller of impulse output circuit, output termination high-speed switch valve, clutch valve, active cylinder solenoid valve and the slave cylinder solenoid valve of impulse output circuit;
The I/O module of the input termination TMS320LF2812 dsp controller of digital quantity output circuit, the output termination gear of digital quantity output circuit, key locking electromagnet;
The CAN module of the input termination TMS320LF2812 dsp controller of CAN interface circuit, the output termination vehicle body computer instrument display of CAN interface circuit;
The SCI module of the input termination TMS320LF2812 dsp controller of SCI interface circuit, the output termination notebook PC serial ports parameter calibration device of SCI interface circuit.
Purpose of the present invention can also further realize by following technical measures:
Aforesaid electric control system for stepless speed transmission for automobile, wherein said power supply circuits comprise the TPS70151 chip, electric capacity and resistance, the power supply input end VIN1 of TPS70151 chip and VIN2 pin connect power supply and respectively pass through a capacity earth, power supply output terminal VSENSOR1 and VSENSOR 2 pins connect the power module of TMS320LF2812 dsp controller, the EN pin of TPS70151 chip, SEQ pin and GND pin ground connection, the moving reset button of MR1 pin catcher, the MR2 pin connects the PG1 pin, VOUT1 pin and VSENSOR1 pin join and pass through two shunt capacitance ground connection, VOUT 2 pins and VSENSOR2 pin join and pass through two shunt capacitance ground connection, the RESET pin connects the XRS pin of TMS320LF2812 dsp controller by a resistance, and the PG1 pin joins by the output terminal of resistance and VOUT1 pin.
Aforesaid electric control system for stepless speed transmission for automobile, wherein said pulse input circuit comprises open-collector voltage comparator, electric capacity and resistance, the reverse input end connecting resistance of voltage comparator and electric capacity constitute low-pass filter, and connect input signal, the positive input of voltage comparator connects comparative voltage by resistance, the output terminal of voltage comparator connects by resistance and draws voltage, and connects the seizure mouth of TMS320LF2812 dsp controller.
Aforesaid electric control system for stepless speed transmission for automobile, wherein said simulated measurement input circuit comprises voltage-stabiliser tube and resistance, voltage-stabiliser tube and a resistance are formed and are joined circuit and ground connection in the lump, the input end of simulated measurement input circuit is by a resistance eutral grounding, connect the input end of the parallel circuit of a voltage-stabiliser tube and a resistance composition again by a resistance, the A/D module of the output termination TMS320LF2812 dsp controller of the parallel circuit of a voltage-stabiliser tube and a resistance composition.
Aforesaid electric control system for stepless speed transmission for automobile, wherein said digital quantity input circlult is chip TLP281-4, the input end of chip TLP281-4 connects power supply by a resistance, and output terminal connects power supply by a resistance and connects the I/O pin of TMS320LF2812 dsp controller.
Aforesaid electric control system for stepless speed transmission for automobile, wherein said impulse output circuit and digital quantity output circuit are chip BTS723, the Vbb of chip BTS723 and SPU pin connect power supply, IN1 pin and IN2 pin connect the PWM output pin of TMS320LF2812 dsp controller, the OUT pin is that output pin connects solenoid valve, ST1 and ST2 pin connect the DG1 and the DG2 pin of TMS320LF2812 dsp controller, and the GND pin is by a resistance eutral grounding.
Aforesaid electric control system for stepless speed transmission for automobile, wherein said CAN interface circuit is the SN65HVD230 chip, the TXN pin of SN65HVD230 chip connects the CANTXA output pin of TMS320LF2812 dsp controller, the RXD pin connects the CANRXA output pin of TMS320LF2812 dsp controller, the RS pin is by a resistance eutral grounding, GND pin ground connection, VCC pin connect power supply and by a capacity earth, pin CANH and CANL are output pin.
Aforesaid electric control system for stepless speed transmission for automobile, wherein said SCI interface circuit is the MAX232ESE chip, pin VCC connects power supply, join and ground connection by electric capacity and pin GND simultaneously, between 1 pin and 3 pin, all connect an electric capacity between 4 pin and 5 pin, 2 pin and 6 pin are respectively by a capacity earth, R2IN links to each other with notebook PC with the T20UT pin, R20UT links to each other with the SCIRX pin of TMS320LF2812 dsp controller, and the T2IN pin links to each other with the SCITX pin of TMS320LF2812 dsp controller.
Advantage of the present invention is: (1) high-performance: adopt the High Performance DSP control chip of TI, have resource and interface on the abundant sheet, data processing performance is stronger than common 16 single-chip microcomputers, greatly enhances product performance; (2) high reliability: adopt advanced integrated circuit technique and high standard components and parts, products-hardware design and manufacturing process are all implemented in strict accordance with high reliability request, guarantee that product is applicable to various bad working environments such as wide temperature range, high humidity, dust, high vibration, strong electromagnetic; (3) reusability: system adopts modular design, by the realization of classifying of its function, can be used for equally realizing on the AT, AMT iso-variable velocity case automatical control system of said function demand, improved hardware design efficient and quality, shortening development time, reduce development cost.
Description of drawings
Fig. 1 is a system block diagram of the present invention.
Fig. 2 is the circuit diagram of power supply circuits of the present invention.
Fig. 3 is the circuit diagram of pulse input circuit.
Fig. 4 is the circuit diagram of simulated measurement input circuit.
Fig. 5 is the circuit diagram of digital quantity input circlult.
Fig. 6 is the circuit diagram of impulse output circuit and digital quantity output circuit.
Fig. 7 is the circuit diagram of CAN interface circuit.
Fig. 8 is the circuit diagram of SCI interface circuit.
Embodiment
Embodiment one
The system block diagram of present embodiment comprises TMS320LF2812 dsp controller, power supply circuits, pulse input circuit, simulated measurement input circuit, switching value input circlult, impulse output circuit, switching value output circuit, CAN interface circuit and SCI interface circuit as shown in Figure 1;
The power module of the output termination TMS320LF2812 dsp controller of power supply circuits;
The output terminal of the input termination engine load sensor of pulse input circuit, engine rotation speed sensor, CVT driving disc speed probe and CVT driven disc speed probe, the capture module of the output termination TMS320LF2812 dsp controller of pulse input circuit;
The input termination slave cylinder oil pressure sensor of simulated measurement input circuit and the output terminal of oil temperature sensor, the A/D module of the output termination TMS320LF2812 dsp controller of simulated measurement input circuit;
The output terminal of the input termination gear selector of digital quantity input circlult, system's power on signal device, brake petal switch and mode selector, the I/O module of the output termination TMS320LF2812 dsp controller of digital quantity input circlult;
The PWM module of the input termination TMS320LF2812 dsp controller of impulse output circuit, output termination high-speed switch valve, clutch valve, active cylinder solenoid valve and the slave cylinder solenoid valve of impulse output circuit;
The I/O module of the input termination TMS320LF2812 dsp controller of digital quantity output circuit, the output termination gear of digital quantity output circuit, key locking electromagnet;
The CAN module of the input termination TMS320LF2812 dsp controller of CAN interface circuit, the output termination vehicle body computer instrument display of CAN interface circuit;
The SCI module of the input termination TMS320LF2812 dsp controller of SCI interface circuit, the output termination notebook PC serial ports parameter calibration device of SCI interface circuit.
Fig. 2 is the circuit diagram of power supply circuits of the present invention, and chip is selected TPS70151 for use, is divided into 3.3V and 1.8V power supply.Power pack VIN1 and VIN2 connect the 5V level, and two pins meet 0.1uF capacitor C 3 and C4 over the ground.The EN pin is an effectively directly ground connection of enable pin low level.SEQ pin and GND pin ground connection, SEQ is an output level sequencing pin.F2812 is a dual power supply: kernel is 1.8V, and the I/O mouth is 3.3V, and needs to consider to power on order.SEQ connects low level by the explanation of chip data, and 3.3V is powered on earlier, powers on behind the 1.8V.VSENSOR1 and VSENSOR 2 pins are that output voltage is regulated pin, because system is output as fixing 3.3V and 1.8V voltage, therefore need not connect adjusting resistance, move voltage output end on directly.This chip provides two reset pin MR1 and MR2, and low level is effective, and we move reset button SW1 with road reset pin MR1 catcher wherein.Another road reset pin MR2 welding system voltage monitoring pin PG1, when the output voltage VO UT1 of system be lower than normal value 55% the time output low level, thereby make chip produce reset signal RESET, controller is resetted thereby the RESET pin is connected to the XRS pin of TMS320LF2812DSP controller.Corresponding energization pins VDD33 of TMS320LF2812 dsp controller and VDD18 are received in VOUT1 and VOUT2 carry-out part tap capacitor C 8 and C9 voltage stabilizing after capacitor C 10 and the C11 filtering.
Fig. 3 is the circuit diagram of pulse input circuit, is made up of open-collector voltage comparator, electric capacity and resistance.Pulse input signal connects the reverse input end of voltage comparator C78 by resistance R 112, and the connection of the reverse input end of resistance R 112 and voltage comparator C78 is crossed and connect a capacitor C 74 ground connection.The positive input of voltage comparator C78 meets comparative voltage VCC by resistance R 114, and by resistance R 115 ground connection.The seizure mouth of the output termination TMS320LF2812 dsp controller of voltage comparator C78, and meet voltage VDD33 by resistance R 111.Reverse input end connecting resistance electric capacity at voltage comparator C78 constitutes low-pass filter, when high-frequency interferencing signal is scurried into it is filtered.The positive input of voltage comparator C78 is the comparing voltage value that is provided with.Pulse signal is received 2812 seizure mouth after by open-collector voltage comparator C78 shaping.
Fig. 4 is the circuit diagram of simulated measurement input circuit, simulated measurement input circuit comprises voltage-stabiliser tube and resistance, voltage-stabiliser tube ZD9 forms a circuit in parallel and a ground connection with a resistance R 34, the input end of described simulated measurement input circuit is by resistance R 32 ground connection, connect the input end of the parallel circuit of voltage-stabiliser tube ZD9 and resistance R 34 compositions again by a resistance R 33, the A/D module of the output termination TMS320LF2812 dsp controller of the parallel circuit of voltage-stabiliser tube ZD9 and resistance R 34 compositions.A/D module with input TMS320LF2812 dsp controller after oil pressure, the temperature signal process divider resistance dividing potential drop.Voltage-stabiliser tube ZD9 carries out voltage stabilizing to the voltage Presig of input, prevents the A/D module of the excessive damage controller of voltage.
Fig. 5 is the circuit diagram of digital quantity input circlult, and the input end of chip TLP281-4 meets power vd D12 by a resistance R 50, and output terminal meets power vd D33 by a resistance R 58 and connects the IOF13 pin of TMS320LF2812 dsp controller.The digital quantity input circlult adopts photoelectric isolating device U6D input controller IOF13 pin to the signal Manual of input, connect a capacitor C 35 between No. 7 ports of electrical isolation device U6D and No. 8 ports, No. 9 port ground connection, No. 10 ports connect the IOF13 pin of TMS320LF2812 dsp controller, and meet voltage VDD33 by resistance R 58, No. 7 ports are input end, and input signal connects port No. 7 by resistance R 54, and input signal also meets power vd D12 by resistance R 50.
Fig. 6 is the circuit diagram of impulse output circuit and digital quantity output circuit, and the circuit diagram of impulse output circuit and digital quantity output circuit is identical, and driving chip is the BTS723 of Infineon, for two-way drives.Pin Vbb meets power supply 12V voltage VDD12, and pin SPU meets voltage VDD33, because 2812 controller drives are limited in one's ability, controls big current drive signal by IN1 and IN2 pin that the T2PWM2 and the T2PWM6 output pin of 2812 controllers are received chip.The output of OUT pin drives solenoid valve.Pin ST1 and ST2 are the feedback of status pins, receive the DG1 of controller and the solenoid-driven signal is exported in the conduct of DG2 pin to system monitoring.The GDD pin is by resistance R 95 ground connection.Output termination high-speed switch valve, clutch valve, active cylinder solenoid valve and the slave cylinder solenoid valve of impulse output circuit just need be used two impulse output circuits shown in Figure 6, and 4 output pins of two impulse output circuits connect the input end of four valves.The output termination gear of digital quantity output circuit, key locking electromagnet only need connect an output pin of digital quantity output circuit the input end of gear, key locking electromagnet.
Fig. 7 is the circuit diagram of CAN interface circuit, and the bus signals that the CANTXA pin of TMS320LF2812 dsp controller is sent by chip SN65HVD230 is converted to the differential level signal of CAN bus, is dealt into bus by CANL and two pins of CANH and gets on.Then the signal on the bus is received by the RXD pin and issue on the CANRXA pin of MS320LF2812 dsp controller.The VCC pin meets power vd D33 and passes through a capacitor C 25 ground connection.Pin GND ground connection, pin RS is by resistance R 37 ground connection.
Fig. 8 is the circuit diagram of SCI interface circuit, and chip is selected the MAX232 chip of Ti company for use, and this chip is the two-way transceiver, and this example is used second channel.Energization pins VCC connects a capacitor C 51 to ground simultaneously for meeting 5V power vd D5, plays voltage regulation filtering.Pin GND ground connection.Between 1 pin and 3 pin, all connect an electric capacity between 4 pin and 5 pin, 2 pin and 6 pin are respectively by a capacity earth.The serial signal of upper-position unit being sent by 8 pin R2IN receives chip internal and is dealt into the T2IN pin that the serial received pin SCIRX. controller of 2812 controllers issues MAX232 by the SCITX pin with signal by R20UT after treatment and sends to upper-position unit through after the inter-process by T20UT then.
Native system is to the collection of engine speed, CVT main driven shaft rotating speed, and the pulse signal of sensor output is input to the seizure timer after treatment, calculates each rotating speed.The warm fuel injection pressure signal of oil enters A/D converter by sample circuit.In the I/O input signal, the shelves that on behalf of the driver, gear signal hang, wherein D-forward gears; The N-neutral; The R-reverse gear; P-locking shelves; M (manual mode).Mode selector is used for selecting the different control mode of CVT: economic model, dynamic mode and general mode.In control procedure, system is according to the gear that obtains, engage corresponding clutch, then to input signal collection and processing, calculate corresponding velocity ratio according to control strategy, then, by output PWM drive signal control hydrovalve, control corresponding main slave cylinder oil pressure, make CVT realize stepless change.
Native system can comprise following module:
By the supply module that power supply circuits are formed, vehicle power is 12V, and analog electrical road binders temperature, oil pressure power pack are 5V.F2812 is a dual power supply: kernel is 1.8V, and the I/O mouth is 3.3V; And need to consider to power on order: 3.3V powers on earlier, powers on behind the 1.8V.Here select the power source special chip TPS70151 of TI company: this is a two-way LDO, built-in order control, hand reset, electrification reset, 500mA/3.3V, the 250mA/1.8V of powering on, satisfy the power reguirements of system fully, the similar chip of big electric current can be used TPS70351 if desired.
The CAN bus communication module of forming by the CAN interface circuit, this module has automatic diagnostic function, fault for speed changer and the generation of vehicle transmission mechanism, but automatic diagnosis also produces the corresponding standard failure code and communicates according to standard agreement by CAN bus and vehicle body computer, submit fault message as required to, ensure running safety and make things convenient for car inspection and repair.
By the SCI system communication module that the SCI interface circuit is formed, this module can be carried out online modification and optimization to the transmission system Control Parameter by serial ports, finishes parameter calibration.
The signal processing module of forming by TMS320LF2812 dsp controller, pulse input circuit, simulated measurement input circuit, digital quantity input circlult, impulse output circuit and digital quantity output circuit.Totally 48 of the CVT interface signals that this automatical control system relates to, removing working control signals such as power supply and ground wire has 31 the tunnel.2 road analog input signals are wherein arranged: oily gentle oil pressure 13 way switch amounts input; The input of 4 road pulsed quantities; The output of 8 way switch amounts, the output of 4 road pulsed quantities.
Collection of simulant signal need be nursed one's health (amplify or dwindle) to signal according to the size of signal; Amplify and adopt universal amplifier such as LM324 to amplify, through handling, output is at 0V-5V for native system sensor die analog signal.Because therefore the AD acquisition range of processor adopts precision resistance dividing potential drop method that it is dwindled at 0-3V.
Rotational speed pulse signal: the input and output shaft tach signal is the 5V pulse signal.In order it to be carried out shaping filter and to realize level conversion, select for use open-collector voltage comparator (LM339) comparative voltage to be set at input end, on output termination 3.3V, draw, make its signal meet the I/O mouth electrical characteristic of F2812.
For engine rotational speed signal and throttle signal, its voltage magnitude can adopt same processing of circuit at 12V.All can adopt this to handle circuit for similar pulse signal and realize shaping filter and level conversion.
The switching signal of input is that 12V needs filtering and level conversion equally, and this type of circuit can be realized by optic coupling element.This type of circuit also can be used for the switching signal exported, as long as the voltage and the resistance value of input/output terminal are suitably selected for use.
The high-power driving signal: can reach 8A as the drive circuit of the big electric currents of needs such as solenoid-driven is optional with its maximum instantaneous electric current of power tube (BTS723G), steady-state current can reach 4A, can satisfy the demand of system's solenoid-driven.The similar chip of bigger electric current can be selected BTS724G for use if desired.
The present invention can also have other mode of execution, and the technological scheme that equal replacement of all employings or equivalent transformation form all drops within the protection domain of requirement of the present invention.
Claims (8)
1. electric control system for stepless speed transmission for automobile is characterized in that: comprise TMS320LF2812DSP controller, power supply circuits, pulse input circuit, simulated measurement input circuit, digital quantity input circlult, impulse output circuit, digital quantity output circuit, CAN interface circuit and SCI interface circuit;
The power module of the output termination TMS320LF2812DSP controller of described power supply circuits;
The output terminal of the input termination engine load sensor of described pulse input circuit, engine rotation speed sensor, CVT driving disc speed probe and CVT driven disc speed probe, the capture module of the output termination TMS320LF2812DSP controller of described pulse input circuit;
The input termination slave cylinder oil pressure sensor of described simulated measurement input circuit and the output terminal of oil temperature sensor, the A/D module of the output termination TMS320LF2812DSP controller of described simulated measurement input circuit;
The output terminal of the input termination gear selector of described digital quantity input circlult, system's power on signal device, brake petal switch and mode selector, the I/O module of the output termination TMS320LF2812DSP controller of described digital quantity input circlult;
The PWM module of the input termination TMS320LF2812DSP controller of described impulse output circuit, output termination high-speed switch valve, clutch valve, active cylinder solenoid valve and the slave cylinder solenoid valve of described impulse output circuit;
The I/O module of the input termination TMS320LF2812DSP controller of described digital quantity output circuit, the output termination gear of described digital quantity output circuit, key locking electromagnet;
The CAN module of the input termination TMS320LF2812DSP controller of described CAN interface circuit, the output termination vehicle body computer instrument display of described CAN interface circuit;
The SCI module of the input termination TMS320LF2812DSP controller of described SCI interface circuit, the output termination notebook PC serial ports parameter calibration device of described SCI interface circuit.
2. electric control system for stepless speed transmission for automobile as claimed in claim, it is characterized in that: described power supply circuits comprise the TPS70151 chip, electric capacity and resistance, the power supply input end VIN1 of described TPS70151 chip and VIN2 pin connect power supply and respectively pass through a capacity earth, power supply output terminal VSENSOR1 and VSENSOR 2 pins connect the power module of TMS320LF2812 dsp controller, the EN pin of described TPS70151 chip, SEQ pin and GND pin ground connection, the moving reset button of MR1 pin catcher, the MR2 pin connects the PG1 pin, VOUT1 pin and VSENSOR1 pin join and pass through two shunt capacitance ground connection, VOUT 2 pins and VSENSOR2 pin join and pass through two shunt capacitance ground connection, the RESET pin connects the XRS pin of TMS320LF2812 dsp controller by a resistance, and the PG1 pin joins by the output terminal of resistance and VOUT1 pin.
3. electric control system for stepless speed transmission for automobile as claimed in claim 1, it is characterized in that: described pulse input circuit comprises open-collector voltage comparator, electric capacity and resistance, the reverse input end connecting resistance of described voltage comparator and electric capacity constitute low-pass filter, and connect input signal, the positive input of described voltage comparator connects comparative voltage by resistance, the output terminal of described voltage comparator connects by resistance and draws voltage, and connects the seizure mouth of TMS320LF2812 dsp controller.
4. electric control system for stepless speed transmission for automobile as claimed in claim 1, it is characterized in that: described simulated measurement input circuit comprises voltage-stabiliser tube and resistance, described voltage-stabiliser tube and a resistance are formed and are joined circuit and ground connection in the lump, the input end of described simulated measurement input circuit is by a resistance eutral grounding, connect the input end of the parallel circuit of a voltage-stabiliser tube and a resistance composition again by a resistance, the A/D module of the output termination TMS320LF2812DSP controller of the parallel circuit of a described voltage-stabiliser tube and a resistance composition.
5. electric control system for stepless speed transmission for automobile as claimed in claim 1, it is characterized in that: described digital quantity input circlult is chip TLP281-4, the input end of described chip TLP281-4 connects power supply by a resistance, and output terminal connects power supply by a resistance and connects the IOF13 pin of TMS320LF2812 dsp controller.
6. electric control system for stepless speed transmission for automobile as claimed in claim 1, it is characterized in that: described impulse output circuit and digital quantity output circuit are chip BTS723, the Vbb of described chip BTS723 and SPU pin connect power supply, IN1 pin and IN2 pin connect the T1PWM and the T2PWM output pin of TMS320LF2812DSP controller, the OUT pin is an output pin, ST1 and ST2 pin connect the DG1 and the DG2 pin of TMS320LF2812 dsp controller, and the GND pin is by a resistance eutral grounding.
7. electric control system for stepless speed transmission for automobile as claimed in claim 1, it is characterized in that: described CAN interface circuit is the SN65HVD230 chip, the TXN pin of described SN65HVD230 chip connects the CANTXA output pin of TMS320LF2812 dsp controller, the RXD pin connects the CANRXA output pin of TMS320LF2812 dsp controller, the RS pin is by a resistance eutral grounding, GND pin ground connection, VCC pin connect power supply and by a capacity earth, pin CANH and CANL are output pin.
8. electric control system for stepless speed transmission for automobile as claimed in claim 1, it is characterized in that: described SCI interface circuit is the MAX232ESE chip, pin VCC connects power supply, join and ground connection by electric capacity and pin GND simultaneously, between 1 pin and 3 pin, all connect an electric capacity between 4 pin and 5 pin, 2 pin and 6 pin are respectively by a capacity earth, R2IN links to each other with notebook PC with the T2OUT pin, R2OUT links to each other with the SCIRX pin of TMS320LF2812 dsp controller, and the T2IN pin links to each other with the SCITX pin of TMS320LF2812 dsp controller.
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| CN2008101007869A CN101285523B (en) | 2008-05-13 | 2008-05-13 | Electric control system for stepless speed transmission for automobile |
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| CN2008101007869A CN101285523B (en) | 2008-05-13 | 2008-05-13 | Electric control system for stepless speed transmission for automobile |
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| CN101174783B (en) * | 2007-10-31 | 2010-11-17 | 中国科学院国家天文台南京天文光学技术研究所 | Arc driving heavy caliber astronomical telescope |
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