CN101456362A - Control circuit for intelligent electric vehicle controller - Google Patents
Control circuit for intelligent electric vehicle controller Download PDFInfo
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- CN101456362A CN101456362A CNA2007101508622A CN200710150862A CN101456362A CN 101456362 A CN101456362 A CN 101456362A CN A2007101508622 A CNA2007101508622 A CN A2007101508622A CN 200710150862 A CN200710150862 A CN 200710150862A CN 101456362 A CN101456362 A CN 101456362A
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Abstract
The invention discloses a control circuit of a controller of an intelligent electric vehicle, which comprises a power supply, a microprocessor, a circuit of a Hall sensor, a power field-effect transistor, a driving circuit, a circuit of a work power supply, a relay protection circuit, a current sampling circuit, a fault detecting circuit and an original edge current-limiting circuit of the power supply, wherein the power supply, the relay protection circuit, a motor, the field-effect transistor and the current sampling circuit are connected sequentially; the circuit of the work power supply is connected with the power supply; the driving circuit is connected with the microprocessor and the field-effect transistor respectively; the microprocessor controls to drive the conduction of the field-effect transistor, so as to control the conduction of the whole loop; the circuit of the Hall sensor, the relay protection circuit and the current sampling circuit are connected with the microprocessor respectively; the fault detecting circuit detects whether all the circuits work normally or not; the fault detecting circuit is connected with the microprocessor directly; and the original edge current-limiting circuit of the power supply is connected with the power supply, the motor and the relay protection circuit respectively and directly. The control circuit has the advantages of stable performance, high security and precise control.
Description
Technical field
The present invention relates to a kind of control circuit, relate in particular to a kind of control circuit for intelligent electric vehicle controller.
Background technology
Today that urban life is accelerated day by day; pursue efficient and also become the requirement of vast civic; and in the selection of the vehicle; battery-driven car has the easy to operate practical characteristics of energy-conserving and environment-protective; accepted by consumers in general, but electric subsequent rows mileage shortening, defectives such as hill climbing ability difference are whenever filled once in the storage battery existence; controller for electric vehicle of the prior art lacks necessary testing circuit and current foldback circuit, therefore can't realize the good protection to battery-driven car.The defective of its existence is as follows:
1. because not to the accurate detection of controller outgoing current, can't be to the Based Intelligent Control of controller outgoing current under the motor overload situation;
2. owing to the accurate interlock of Hall element signal and the pressure drop of power tube break-make is not detected, cause the dynamic judgement and the protection of driving and can't realize that power tube punctures and handle lost efficacy;
3. can't realize that embedded controller MCU crashes or the automatic afterwards protection of cutting off controller output of unusual damage
4. owing to there is not current foldback circuit, power supply is being under overcurrent or the short-circuit condition, and outgoing current constantly strengthened with the reduction of output voltage and forms conditions of streaking when the time-delay of control circuit caused overcurrent, and circuit stress is strengthened, and had reduced the reliability of power supply.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of have the former margin current circuit of power supply, stable performance, safe, control accurate control circuit for intelligent electric vehicle controller.
The present invention solves its technical matters and takes following technical scheme to realize: a kind of control circuit for intelligent electric vehicle controller of the present invention, comprise: power supply, microprocessor, be used to control motor speed Hall element circuit, power field effect pipe, be used to drive described power field effect pipe work driving circuit, be used for providing the working power circuit of stable operation power supply, relay protection circuit and current sampling circuit to described microprocessor; Described power supply; relay protection circuit; motor; field effect transistor is connected in turn with current sampling circuit; described working power circuit is connected with power supply; described driving circuit links to each other with described field effect transistor with microprocessor respectively; come the conducting of controlling and driving power field effect pipe by microprocessor; thereby control the conducting of whole loop; described Hall element circuit; described relay protection circuit links to each other with microprocessor respectively with described current sampling circuit; also comprise and detect each circuit part whether trouble detect circuit and the former margin current circuit of power supply of normal operation; described trouble detect circuit directly links to each other with microprocessor, the former margin current circuit of described power supply respectively with described power supply; motor; described relay protection circuit direct connection.
Trouble detect circuit described in its technical scheme comprises that is used to detect whether the be short-circuited motor short-circuit detecting circuit of fault of motor, and one is used to detect described controller and whether the driving testing circuit of driving phenomenon and one take place is used to detect that MCU takes place to crash or the MCU trouble detect circuit of faults such as unusual damage; Described driving testing circuit is connected between described power field effect pipe and the described microprocessor; described motor short-circuit detecting circuit is connected between described current sampling circuit and the described microprocessor, and described MCU trouble detect circuit is connected between described microprocessor and the relay protection circuit.
The former margin current circuit of power supply described in its technical scheme, comprise comparator, voltage transformer and PWM driving circuit, PWM drive pulse and benchmark Vref signal combination are reference voltage one tunnel input of device as a comparison, primary current signal another input of device as a comparison of sampling, the output of comparator links to each other with the SOFT end of PWM driving circuit, the driving pulsewidth of control PWM driving circuit.Comparator is made of aerotron V1, V2 and V3 in the former margin current circuit of described power supply, and the emitter of V1 and V2 links to each other with the Vref signal by resistance R 4; The base stage of V1 and V2 is two input ends of circuit as a comparison, and the base stage of V1 links to each other with the PWM drive pulse signal through resistance R 1 respectively, through resistance R 3 with link to each other with the Vref signal; Former sampling edge current signal outputs to the base stage of V2, and the collecting electrode of V1 links to each other with the base stage of V3, and the collecting electrode of V3 is the output of circuit as a comparison.
Driving circuit described in its technical scheme is made of three aerotrons, two resistance and an electric capacity; described relay protection circuit is made of a relay, a flywheel diode, an aerotron and a resistance; described MCU trouble detect circuit is made of a chemical capacitor, two diodes, aerotron and peripheral circuit thereof; described motor short-circuit detecting circuit is made of a sampling resistor, op amp and peripheral circuit thereof, and described driving testing circuit is made of two divider resistances and a diode.
The present invention compared with prior art has significant advantage and beneficial effect, is embodied in the following aspects:
The present invention have A/D conversion and outer interrupting channel by use embedded controller as main control chip, and be provided with the faulty condition testing circuit, can realize accurately detecting controller and export electric current on motor, and under overload situations Based Intelligent Control;
2. can realize cell pressure is accurately detected and exports steadily at under-voltage transient process middle controller, and can the accurate interlock of Hall element signal and the pressure drop of power field effect pipe break-make be detected, thereby avoid causing the driving phenomenon;
3. the output of automatic cut-out controller is protected after can realizing embedded controller MCU deadlock or unusual the damage;
4. compensate by the reference voltage of introducing pwm signal the overcurrent comparator; current-limiting points is constant relatively when guaranteeing the input voltage variation; output voltage reduces and electric current no longer trails during overcurrent protection; overcome traditional power supply current-limiting protection electric current and hangover and the excessive problem of current-limiting points drift have occurred; reduce the cal val of power device in the circuit, improved the reliability of Switching Power Supply.
Description of drawings
Fig. 1 is a diagram of circuit of the present invention;
Fig. 2 is schematic circuit diagram of the present invention;
Fig. 3 is the former margin current circuit of a power supply of the present invention schematic diagram.
The specific embodiment
Narrate below in conjunction with physical circuit figure given in the accompanying drawing technical scheme of the present invention is described in detail.
Referring to Fig. 1,2,3
The present invention includes power supply; the former margin current circuit of power supply; relay protection circuit; motor M and power field effect pipe Q8; driving circuit of embedded controller MCU control and driving power field effect transistor Q8; a hall sensing circuit directly links to each other with described embedded controller; a voltage detection circuit and a working power circuit are connected between described power supply and the embedded controller MCU; described embedded controller MCU trouble detect circuit is connected between relay protection circuit and the embedded controller MCU; a driving testing circuit is connected between described field effect transistor and the embedded controller MCU; a motor short-circuit detecting circuit is connected between described current sampling circuit and the embedded controller MCU, and described embedded controller MCU is also by the described relay protection circuit of aerotron Q3 direct control.
Described intelligent electric vehicle controller provides work energy for motor M and each integrated chip by power supply, the rotating speed of motor M is by the field effect transistor Q8 control that is connected between power supply and the motor M, field effect transistor Q8 intermittently connects and turn-offs, the rotating speed of motor M is then connected with the time of turn-offing by field effect transistor Q8 and is recently controlled, the time of connecting is long more, the rotating speed of motor M is fast more, and vice versa.The control signal that the user handled that described embedded controller MCU provides Hall element converts the pulse of different in width to, control Driver Circuit drives the turn-on and turn-off of field effect transistor, thereby the velocity of rotation of control motor, and monitor the operation of entire controller in real time by various samplings and testing circuit, realize effective control to whole intelligent electric vehicle controller.
Described working power circuit is made of a regulator block U4, resistance R 6, a capacitor C 8 and a chemical capacitor C7, the input of described regulator block U4 is drawn by the collecting electrode in the voltage sampling circuit, insert through resistance R 6 backs, be connected across between the mouth and ground of regulator block U4 after two capacitor C 7, the C8 parallel connection, and the positive pole of chemical capacitor links to each other with regulator block U4 mouth, after circuit energized, aerotron Q1 conducting, the mouth of regulator block U4 is promptly exported+the 5V working power.
Described driving circuit is by three aerotron Q5, Q6, Q7, and two resistance R 15, R17 and capacitor C 16 constitute, and wherein, Q7 is the positive-negative-positive aerotron.Resistance R 16 links to each other with the pulsewidth output PWM end of embedded controller MCU with capacitor C 16 backs in parallel one end, the other end links to each other with the base stage of aerotron Q5, the grounded emitter of aerotron Q5, collecting electrode links to each other with the base stage of aerotron Q6, Q7 respectively, the emitter of Q6, two aerotrons of Q7 links to each other, and links to each other with the grid of field effect transistor through resistance R 17 backs simultaneously.When the PWM of embedded controller end was exported the pulse of certain width, the driving step by step by each aerotron in the driving circuit made the field effect transistor intermittent conduction, thus the control rotating speed of motor.
Described relay protection circuit is made of a relay J 1, sustained diode 9, an aerotron Q3 and a resistance R 12; the base stage of described aerotron Q3 is connected with the data RB3 end of embedded controller through described resistance R 12 backs; the collecting electrode of aerotron Q4 directly links to each other in emitter and the MCU trouble detect circuit; collecting electrode links to each other with the coil of relay J 1; the other end of coil links to each other with positive source; the open contact of relay J 1 is serially connected between power supply and the motor, the coils from parallel connection of coils of sustained diode 9 and relay J 1.
The former margin current circuit of described power supply, comprise comparator, voltage transformer and PWM driving circuit, PWM drive pulse and benchmark Vref signal combination are reference voltage one tunnel input of device as a comparison, primary current signal another input of device as a comparison of sampling, the output of comparator links to each other with the SOFT end of PWM driving circuit, the driving pulsewidth of control PWM driving circuit.Comparator is made of aerotron V1, V2 and V3 in the former margin current circuit of described power supply, and the emitter of V1 and V2 links to each other with the Vref signal by resistance R 4; The base stage of V1 and V2 is two input ends of circuit as a comparison, and the base stage of V1 links to each other with the PWM drive pulse signal through resistance R 1 respectively, through resistance R 3 with link to each other with the Vref signal; Former sampling edge current signal outputs to the base stage of V2, and the collecting electrode of V1 links to each other with the base stage of V3, and the collecting electrode of V3 is the output of circuit as a comparison.
Principle of work: aerotron V1, V2 and V3 constitute comparator, are the reference voltage reference voltage of device as a comparison by resistance R 1, R2, R3 and capacitor C 1 introducing PWM drive pulse and benchmark Vref signal combination.The primary current signal of this voltage and sampling compares.When outgoing current increases, the corresponding increase of primary current, after surpassing reference voltage, aerotron V3 conducting, the collecting electrode of aerotron V3 also are that the SOFT terminal voltage reduces, and the driving pulsewidth of PWM chip is narrowed down, output voltage reduces, the driving pulsewidth of PWM narrows down reference voltage is further descended, compensation since the time-delay of control circuit when causing overcurrent outgoing current realize constant current or return characteristic with the defective that the reduction of output voltage continues to increase.When input voltage raises, PWM drive pulse narrowed width, the base bias voltage of aerotron V1 reduces, and the cut-off current when not adding this circuit is reduced; And input voltage is when reducing, and PWM drive pulse width broadening, V1 base tension raise, and the cut-off current when not adding this circuit is raise, and guarantees the constant of current-limiting points.
Described current sampling circuit is made of a sampling resistor R18, resistance R 19, R20, R21, capacitor C 17, chemical capacitor C18 and an amplifier U2A.The end ground connection of sampling resistor R18, the source electrode of other end connecting resistance R19 and power field effect pipe Q8, the in-phase input end of described capacitor C 17 of another termination of R19 and op amp U2A, the other end ground connection of capacitor C 17, the mouth of U2A link to each other with the positive pole of C18 and also are input to the input channel ANO2 of the band A/D converter of embedded controller U1 simultaneously.When controller normally moves, the Q8 conducting, current of electric also flows through sampling resistor R18, so the loss in voltage on the R18 is directly proportional with the electric current of the motor of flowing through.This pressure drop is through the ANO2 of U2A input U1, and through the A/D conversion, U1 just can accurately measure the electric current of motor.
Described Hall element circuit is made up of misconnection power protection diode D6, Hall element, pull down resistor R1.Positive pole connection+5V the power supply of diode D6, negative pole connects the power end of Hall element, power to Hall element, the other end ground connection of Hall element, the mouth of Hall element is by ground connection behind the end of pull down resistor R1, and the mouth of Hall element is input to the A/D switching channel AN2 end of embedded controller U1 simultaneously.The effect of described diode is; when the peripheral wiring misconnection of Hall element power supply, can protect embedded controller U1; described pull down resistor R1 carries out drop-down to the A/D of embedded controller U1 conversion input terminal voltage, hour be equivalent to not connect Hall element when Hall element is adjusted to.When normal working, embedded controller U1 through A/D conversion and computing, correspondingly regulates the pulsewidth that PWM exports according to the height of the voltage of Hall element input, thus the control rotating speed of motor.
Described driving testing circuit by detect Q8 open and the situation of closing detects the mode of operation of motor.Under the normal circumstances; the driving testing circuit can detect field effect transistor and constantly open and closing signal; when pulse duration modulation output is not full conducting; Q8 must be in and close or open and close state alternately; if be upsampled to the electric current of the motor of flowing through simultaneously at current sampling circuit; the input channel RA4 of U1 must detect the high level of interruption so; if in certain sufficiently long time, do not detect high level; just can judge that field effect transistor is in complete conducting; motor is not controlled by PWM, and this moment, U1 turned off the motor power supply by relay protection circuit.
Described motor short-circuit detecting circuit is by resistance R 32, R33, aerotron Q9, and diode D10, chemical capacitor C24 and capacitor C 25 constitute.One end of resistance R 32 connects the point of connection of described power field effect pipe Q8 and sampling resistor R18, one end of another termination capacitor C 25 and the base stage of aerotron Q9, the other end ground connection of capacitor C 25, the emitter of aerotron Q9 connects the negative pole of diode D10 and the negative pole of chemical capacitor C24, diode D10 is in parallel with chemical capacitor C24, and positive pole is ground connection all, the collecting electrode of aerotron Q9 connects after by pull-up resistor R33+and 5V power supply and linking to each other with the outer interruption input channel RB0/INT of embedded controller U1 simultaneously.During normal operation, the pressure drop deficiency of sampling resistor R18 is not so that aerotron Q9 conducting causes the outer interruption of Q1 at this moment, and when the motor short circuit, R18 obtains a sufficiently high voltage.The Q9 conducting, U1 in time turn-offs the output of PWM.
Described MCU trouble detect circuit has capacitor C 14, chemical capacitor C15, diode D3, D4, and resistance R 13, R14 and aerotron Q4 form.The I/O passage RB1 of described capacitor C 14 1 termination embedded controller U1, the other end connects the negative pole of diode D3 and the positive pole of D4 respectively.The positive pole of diode D3 links to each other with the emitter of aerotron Q9 described in the motor short-circuit detecting circuit, and the negative pole of diode D4 links to each other with resistance R 14 with the positive pole of resistance R 13, chemical capacitor C15 respectively.The other end of resistance R 13 connects behind the emitter of negative pole, aerotron Q4 of chemical capacitor C15 ground connection more respectively, and the other end of resistance R 14 links to each other with the base stage of aerotron Q4, the emitter of aerotron Q3 in the collector connection relay protective circuit of aerotron Q4.When U1 broke down, the I/O mouth RB1 of U1 end was only exported continuous high level or low level, and aerotron Q4 ends, and relay protection circuit disconnects the power supply of motor simultaneously.
Utilize technical solutions according to the invention, or those skilled in the art designing the similar techniques scheme under the inspiration of technical solution of the present invention, and reach above-mentioned technique effect, all is to fall into protection scope of the present invention.
Claims (5)
1. control circuit for intelligent electric vehicle controller, comprise: power supply, microprocessor, be used to control motor speed Hall element circuit, power field effect pipe, be used to drive described power field effect pipe work driving circuit, be used for providing the working power circuit of stable operation power supply, relay protection circuit and current sampling circuit to described microprocessor; Described power supply; relay protection circuit; motor; field effect transistor is connected in turn with current sampling circuit; described working power circuit is connected with power supply; described driving circuit links to each other with described field effect transistor with microprocessor respectively; come the conducting of controlling and driving power field effect pipe by microprocessor; thereby control the conducting of whole loop; described Hall element circuit; described relay protection circuit links to each other with microprocessor respectively with described current sampling circuit; it is characterized in that: also comprise and detect each circuit part whether trouble detect circuit and the former margin current circuit of power supply of normal operation; described trouble detect circuit directly links to each other with microprocessor, the former margin current circuit of described power supply respectively with described power supply; motor; described relay protection circuit direct connection.
2. control circuit for intelligent electric vehicle controller as claimed in claim 1, it is characterized in that: described trouble detect circuit comprises that is used to detect whether the be short-circuited motor short-circuit detecting circuit of fault of motor, and one is used to detect described controller and whether the driving testing circuit of driving phenomenon and one take place is used to detect that MCU takes place to crash or the MCU trouble detect circuit of faults such as unusual damage; Described driving testing circuit is connected between described power field effect pipe and the described microprocessor; described motor short-circuit detecting circuit is connected between described current sampling circuit and the described microprocessor, and described MCU trouble detect circuit is connected between described microprocessor and the relay protection circuit.
3. control circuit for intelligent electric vehicle controller as claimed in claim 1, it is characterized in that: the former margin current circuit of described power supply, comprise comparator, voltage transformer and PWM driving circuit, PWM drive pulse and benchmark Vref signal combination are reference voltage one tunnel input of device as a comparison, primary current signal another input of device as a comparison of sampling, the output of comparator links to each other with the SOFT end of PWM driving circuit, the driving pulsewidth of control PWM driving circuit.
4. control circuit for intelligent electric vehicle controller as claimed in claim 3 is characterized in that: comparator is made of aerotron V1, V2 and V3 in the former margin current circuit of described power supply, and the emitter of V1 and V2 links to each other with the Vref signal by resistance R 4; The base stage of V1 and V2 is two input ends of circuit as a comparison, and the base stage of V1 links to each other with the PWM drive pulse signal through resistance R 1 respectively, link to each other with the Vref signal through resistance R 3; Former sampling edge current signal outputs to the base stage of V2, and the collecting electrode of V1 links to each other with the base stage of V3, and the collecting electrode of V3 is the output of circuit as a comparison.
5. intelligent electric vehicle control circuit as claimed in claim 1 or 2; it is characterized in that: described driving circuit is by three aerotrons; two resistance and an electric capacity constitute; described relay protection circuit is by a relay; a flywheel diode; an aerotron and a resistance constitute; described MCU trouble detect circuit is by a chemical capacitor; two diodes; aerotron and peripheral circuit thereof constitute; described motor short-circuit detecting circuit is by a sampling resistor; op amp and peripheral circuit thereof constitute, and described driving testing circuit is made of two divider resistances and a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101508622A CN101456362A (en) | 2007-12-11 | 2007-12-11 | Control circuit for intelligent electric vehicle controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101508622A CN101456362A (en) | 2007-12-11 | 2007-12-11 | Control circuit for intelligent electric vehicle controller |
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| CN101456362A true CN101456362A (en) | 2009-06-17 |
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| CNA2007101508622A Pending CN101456362A (en) | 2007-12-11 | 2007-12-11 | Control circuit for intelligent electric vehicle controller |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035614A (en) * | 2009-09-27 | 2011-04-27 | 中兴通讯股份有限公司 | Transmitting end-based fault monitoring device |
| CN102163518A (en) * | 2011-04-12 | 2011-08-24 | 上海沪工汽车电器有限公司 | Control circuit of relay coil of electric vehicle |
| CN102673491A (en) * | 2011-03-09 | 2012-09-19 | 苏州益高电动车辆制造有限公司 | Electric system assembly of electric vehicle |
| CN103795311A (en) * | 2012-11-02 | 2014-05-14 | 常州大学 | Control and detection circuit for DC motor as well as control and detection method for DC motor |
| CN104062584A (en) * | 2013-03-21 | 2014-09-24 | 常州大学 | Work condition detection circuit of DC motor and corresponding method |
| CN104267629A (en) * | 2014-09-29 | 2015-01-07 | 长城汽车股份有限公司 | Automobile inductive load control circuit |
| CN106208647A (en) * | 2015-05-04 | 2016-12-07 | 中兴通讯股份有限公司 | Over-current protection method and device |
-
2007
- 2007-12-11 CN CNA2007101508622A patent/CN101456362A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035614A (en) * | 2009-09-27 | 2011-04-27 | 中兴通讯股份有限公司 | Transmitting end-based fault monitoring device |
| CN102673491A (en) * | 2011-03-09 | 2012-09-19 | 苏州益高电动车辆制造有限公司 | Electric system assembly of electric vehicle |
| CN102163518A (en) * | 2011-04-12 | 2011-08-24 | 上海沪工汽车电器有限公司 | Control circuit of relay coil of electric vehicle |
| CN102163518B (en) * | 2011-04-12 | 2013-11-06 | 上海沪工汽车电器有限公司 | Control circuit of relay coil of electric vehicle |
| CN103795311A (en) * | 2012-11-02 | 2014-05-14 | 常州大学 | Control and detection circuit for DC motor as well as control and detection method for DC motor |
| CN104062584A (en) * | 2013-03-21 | 2014-09-24 | 常州大学 | Work condition detection circuit of DC motor and corresponding method |
| CN104267629A (en) * | 2014-09-29 | 2015-01-07 | 长城汽车股份有限公司 | Automobile inductive load control circuit |
| CN106208647A (en) * | 2015-05-04 | 2016-12-07 | 中兴通讯股份有限公司 | Over-current protection method and device |
| CN106208647B (en) * | 2015-05-04 | 2020-05-05 | 中兴通讯股份有限公司 | Overcurrent protection method and device |
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Application publication date: 20090617 |