CN101183846A - Brushless motor control detecting system - Google Patents
Brushless motor control detecting system Download PDFInfo
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- CN101183846A CN101183846A CNA2007101822592A CN200710182259A CN101183846A CN 101183846 A CN101183846 A CN 101183846A CN A2007101822592 A CNA2007101822592 A CN A2007101822592A CN 200710182259 A CN200710182259 A CN 200710182259A CN 101183846 A CN101183846 A CN 101183846A
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 9
- 230000010363 phase shift Effects 0.000 claims description 4
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- 239000003990 capacitor Substances 0.000 description 24
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Abstract
The invention discloses a detection system of brushless motor control, comprising an electric power, a transform control circuit, a single-chip microcomputer, a drive circuit, a brushless motor, and an A/D converter. The electric power supplies power to the transform control circuit. The transform control circuit outputs signals to the single-chip microcomputer. After being processed by the single-chip microcomputer, the output signals are transmitted to the drive circuit. The drive circuit drives the brushless motor and inputs the current signals to the single-chip microcomputer via the A/D converter. The brushless motor outputs voltage signals to the transform control circuit. The transform control circuit comprises a third-order filter circuit, an amplifying reverse circuit and a comparison circuit. The common ends of the resistances R27, R28 and R29 are connected with the negative of the amplifier IC1A. The other ends of the resistances R27, R28 and R29 are respectively connected with the negatives of the comparators IC2A, IC2B and IC2C. The output end of the inverter IC1B is connected with the positives of the comparators IC2A, IC2B and IC2C.
Description
Technical field
The present invention relates to a kind of detection system of electric automobiles, relate in particular to a kind of brushless motor control detecting system.
Background technology
At present, brshless DC motor has that speed governing is good, volume is little, the efficient advantages of higher, is used widely in a lot of fields (comprising electric automobiles).Yet, because brshless DC motor itself does not have phase changer, so need to adopt certain method to obtain rotor-position signal.Traditional method adopts transducer to obtain rotor-position, though method is simple, because transducer is affected by the external environment, has brought easy damage, increases cost, is difficult to shortcomings such as maintenance, and the scope of application also is restricted accordingly.The domestic and foreign literature data also provides a series of solution, processes device but great majority all are based on DSP, contains testing circuit, lay particular stress on hardware system, components and parts are many, the circuit complexity, not only can not judge current hall position accurately, and be not easy maintenance; All be with 16 or 32 single-chip microcomputers mostly in the prior art, the price height, cost is big, and the configuration requirement of these single-chip microcomputers is too high, is unfavorable for large-scale application and industrialization.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of brushless motor control detecting system is provided.
The present invention solves its technical problem and takes following technical scheme to realize:
Brushless motor control detecting system of the present invention comprises: power supply, conversion control circuit, single-chip microcomputer, drive circuit, brushless electric machine, A/D converter, described power supply is powered to described conversion control circuit, described conversion control circuit outputs signal to described single-chip microcomputer, after handling, described single-chip microcomputer outputs signal to described drive circuit, described drive circuit drives described brushless electric machine, through described A/D converter current signal is inputed to described single-chip microcomputer again, described brushless electric machine output voltage signal is given described conversion control circuit, described conversion control circuit comprises one three rank filter circuit, one is amplified negater circuit and a comparison circuit, its connected mode is: resistance R 27 in the described three rank filter circuits, resistance R 28, the common port of resistance R 29 connects the negative pole of amplifier IC1A in the described amplification negater circuit, the other end of resistance R 27, the other end of resistance R 28, the other end of resistance R 29 meets comparator IC2A in the described comparison circuit respectively, comparator IC2B, the negative pole of comparator IC2C, the output of inverter ic 1B is that the mid-point voltage of the three-phase voltage of described brushless electric machine is received comparator IC2A respectively in the described amplification negater circuit, comparator IC2B, the positive pole of comparator IC2C.
Its technical scheme can also comprise: the connected mode of described three rank filter circuits is, resistance R 1, capacitor C 1, capacitor C 10 is formed first-order filtering, resistance R 2, capacitor C 4, capacitor C 13 is formed second-order filter, resistance R 13, capacitor C 5, capacitor C 14 is formed three rank filtering, after three rank filtering, the input voltage decay, phase shift backward, triode T1, triode T6, triode T5 is as three switches difference control capacitance C1, capacitor C 4, capacitor C 5, the output frequency of oscillation, resistance R 3, resistance R 4, resistance R 14 is a current-limiting resistance, and triode T4 is as switch control triode T1, triode T2, the conducting of triode T5 with by.
Its technical scheme can also comprise: the connected mode of described amplification negater circuit is, the average voltage that the triple line of described brushless electric machine obtains through described three rank filter circuits is received the negative pole of amplifier IC1A, the plus earth of amplifier IC1A, the end of the output connecting resistance R32 of amplifier IC1A, the negative pole of another termination inverter ic 1B of resistance R 32 and an end of resistance R 31, the end of the other end difference connecting resistance R33 of resistance R 31 and the negative pole of inverter ic 1B, the output of another termination inverter ic 1B of resistance R 33, resistance R 30 is connected across negative pole and the output of amplifier IC1A, and capacitor C 19 is connected across 4 pin and 8 pin of amplifier IC1A.
Its technical scheme can also comprise: the connected mode of described comparison circuit is, the output of inverter ic 1B is the positive pole that the mid-point voltage of the three-phase voltage of described brushless electric machine is received comparator IC2A, comparator IC2B, comparator IC2C respectively, compare with three-phase voltage respectively, obtain high-low level; The other end of the negative pole connecting resistance R27 of comparator IC2A, the negative pole of comparator IC2B connects the other end of R28, the negative pole of comparator IC2C connects the other end of R29, the output of comparator IC2A, comparator IC2B, comparator IC2C connects described single-chip microcomputer respectively, capacitor C 20 is connected across positive pole and the negative pole of comparator IC2A, one end of resistance R 19, resistance R 20, resistance R 21 connects the output of comparator IC2A, comparator IC2B, comparator IC2C respectively, another termination 5.6V voltage of resistance R 19, resistance R 20, resistance R 21; Resistance R 19, resistance R 20, resistance R 21 are respectively pull-up resistor; Capacitor C 20 is a filter capacitor.
The present invention compared with prior art has significant advantage and beneficial effect, is embodied in the following aspects:
1. after three rank filtering, input voltage decay, phase shift behind comparison circuit, are judged high-low level, thereby can be judged current hall position accurately more backward;
2. the present invention adopts 8 single-chip microcomputers to meet the demands usually, has reduced the requirement to single-chip microcomputer, provides cost savings;
3. be not subjected to the influence of external environment, be not easy to damage, the circuit elements device is few, and maintenance cost reduces.
Description of drawings
Fig. 1 is a flow chart of the present invention;
Fig. 2 is the circuit diagram of conversion control circuit of the present invention.
Embodiment
Narrate below in conjunction with physical circuit figure given in the accompanying drawing technical scheme is described in detail.
Referring to Fig. 1,2, the present invention includes: comprise power supply, conversion control circuit, single-chip microcomputer, drive circuit, brushless electric machine, A/D converter, described power supply is powered to described conversion control circuit, described conversion control circuit outputs signal to described single-chip microcomputer, after handling, described single-chip microcomputer outputs signal to described drive circuit, described drive circuit drives described brushless electric machine, through described A/D converter signal is inputed to described single-chip microcomputer again, described brushless electric machine outputs signal to described conversion control circuit.Described conversion control circuit comprises one three rank filter circuit, one is amplified negater circuit and a comparison circuit, its connected mode is: an end of resistance R 27 in the described three rank filter circuits, one end of resistance R 28, one end of resistance R 29 meets comparator IC2A in the described comparison circuit respectively, comparator IC2B, the negative pole of comparator IC2C, resistance R 27, resistance R 28, the common port of resistance R 29 connects the negative pole of amplifier IC1A in the described amplification negater circuit, and the output of inverter ic 1B is that the mid-point voltage of the three-phase voltage of described brushless electric machine is received comparator IC2A respectively in the described amplification negater circuit, comparator IC2B, the positive pole of comparator IC2C.
Referring to Fig. 2
Three rank filter circuits: (A facies analysis, B, C facies principle are identical)
Resistance R 1, capacitor C 1, capacitor C 10 are formed first-order filtering;
Resistance R 2, capacitor C 4, capacitor C 13 are formed second-order filter;
Resistance R 13, capacitor C 5, capacitor C 14 are formed three rank filtering;
After three rank filtering, input voltage decay, phase shift are divided to about 10V through input current potential maximum after the dividing potential drop backward.Triode T1, triode T6, triode T5 are as three switches difference control capacitance C1, capacitor C 4, capacitor C 5, determine frequency of oscillation, resistance R 3, resistance R 4, resistance R 14 are current-limiting resistance, and triode T4 is as switch control triode T1, triode T2, triode T5; Resistance R 26 is as divider resistance control triple line average voltage.
Reverse amplification circuit:
Three-phase voltage obtains three-way motor mid-point voltage through add circuit, a, b, three branches of c form the negative pole that add circuit is received amplifier IC1A, the plus earth of amplifier IC1A, the end of the output connecting resistance R32 of amplifier IC1A, the negative pole of another termination inverter ic 1B of resistance R 32 and an end of resistance R 31, the end of the other end difference connecting resistance R33 of resistance R 31 and the negative pole of inverter ic 1B, the output of another termination inverter ic 1B of resistance R 33, resistance R 30 is connected across negative pole and the output of amplifier IC1A, and capacitor C 19 is connected across 4 pin and 8 pin of amplifier IC1A.Three resistance (R27, R28, R29) and R30 computing are by formula :-V0=Rf/R1*Va+Rf/R2*Vb+Rf/R3*Vc
:-V0=1/3 (Va+Vb+Vc)
Comparison circuit:
The output of inverter ic 1B is the positive pole that the mid-point voltage of the three-phase voltage of described brushless electric machine is received comparator IC2A, comparator IC2B, comparator IC2C respectively, compares with three-phase voltage respectively, obtains high-low level; The other end of the negative pole connecting resistance R27 of comparator IC2A, the negative pole of comparator IC2B connects the other end of R28, the negative pole of comparator IC2C connects the other end of R29, the output of comparator IC2A, comparator IC2B, comparator IC2C connects described single-chip microcomputer respectively, capacitor C 20 is connected across positive pole and the negative pole of comparator IC2A, one end of resistance R 19, resistance R 20, resistance R 21 connects the output of comparator IC2A, comparator IC2B, comparator IC2C respectively, another termination 5.6V voltage of resistance R 19, resistance R 20, resistance R 21; Resistance R 19, resistance R 20, resistance R 21 are respectively pull-up resistor; Capacitor C 20 is a filter capacitor.
After after the filtering three-phase line voltage of motor output and three-way mid-point voltage being compared, accurately obtain current motor rotor position.
When motor speed is zero, set up Mathematical Modeling by motor coil mutual inductance principle, accurately confirm the signal of motor input through single-chip microcomputer, can accurately judge current motor stator position, the output control signal corresponding is controlled the conducting of motor three-phase and is ended the zero start of realization motor.
Brushless electric machine starting control method of the present invention is: detect transient current according to the coil mutual inductance, the Mathematical Modeling by setting up calculates transient speed.Act on brshless DC motor by the power controlling transformation device, realize the speed governing purpose.
Operation principle of the present invention: when motor low speed, the signal that single-chip microcomputer produces according to the motor mutual inductance is gathered transient current, sets up Mathematical Modeling by calculating, and zero brushless electric machine zero start is realized in accurate current motor stator position.When rotating speed is higher, switch by syllogic, accurately control the startup and the operation of brushless electric machine.When motor speed is 0, detect transient current according to the coil mutual inductance, set up Mathematical Modeling by motor coil mutual inductance principle, accurately confirm the signal of motor input through single-chip microcomputer, calculate transient speed, can accurately judge current motor stator position, the output control signal corresponding.By the power controlling transformation device, control the conducting of motor three-phase and end the zero start and the speed governing purpose of realization motor.
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 (4)
1. brushless motor control detecting system, comprise power supply, conversion control circuit, single-chip microcomputer, drive circuit, brushless electric machine, A/D converter, described power supply is powered to described conversion control circuit, described conversion control circuit outputs signal to described single-chip microcomputer, after handling, described single-chip microcomputer outputs signal to described drive circuit, described drive circuit drives described brushless electric machine, through described A/D converter current signal is inputed to described single-chip microcomputer again, described brushless electric machine output voltage signal is given described conversion control circuit, it is characterized in that: described conversion control circuit comprises one three rank filter circuit, one is amplified negater circuit and a comparison circuit, its connected mode is: resistance (R27) in the described three rank filter circuits, resistance (R28), the common port of resistance (R29) connects the negative pole of amplifier (IC1A) in the described amplification negater circuit, resistance (R27), resistance (R28), the other end of resistance (R29) connects comparator in the described comparison circuit (IC2A) respectively, comparator (IC2B), the negative pole of comparator (IC2C), the output of inverter (IC1B) is received comparator (IC2A) respectively in the described amplification negater circuit, comparator (IC2B), the positive pole of comparator (IC2C).
2. brushless motor control detecting system as claimed in claim 1, it is characterized in that: the connected mode of described three rank filter circuits is: resistance (R1), electric capacity (C1), electric capacity (C10) is formed first-order filtering, resistance (R2), electric capacity (C4), electric capacity (C13) is formed second-order filter, resistance (R13), electric capacity (C5), electric capacity (C14) is formed three rank filtering, after three rank filtering, the input voltage decay, phase shift backward, triode (T1), triode (T6), triode (T5) is as three switches difference control capacitances (C1), electric capacity (C4), electric capacity (C5), the output frequency of oscillation, resistance (R3), resistance (R4), resistance (R14) is current-limiting resistance, and triode (T4) is as switch control triode (T1), triode (T2), the conducting of triode (T5) with by.
3. brushless motor control detecting system as claimed in claim 1, it is characterized in that: the connected mode of described amplification negater circuit is: the average voltage that the triple line of described brushless electric machine obtains through described three rank filter circuits is received the negative pole of amplifier (IC1A), the plus earth of amplifier (IC1A), one end of the output connecting resistance (R32) of amplifier (IC1A), the negative pole of another termination inverter (IC1B) of resistance (R32) and an end of resistance (R31), one end of the other end difference connecting resistance (R33) of resistance (R31) and the negative pole of inverter (IC1B), the output of another termination inverter (IC1B) of resistance (R33), resistance (R30) is connected across the negative pole and the output of amplifier (IC1A), and electric capacity (C19) is connected across 4 pin and 8 pin of amplifier (IC1A).
4. brushless motor control detecting system as claimed in claim 1, it is characterized in that: the connected mode of described comparison circuit is: the output of inverter (IC1B) is received comparator (IC2A) respectively, comparator (IC2B), the positive pole of comparator (IC2C), the other end of the negative pole connecting resistance (R27) of comparator (IC2A), the negative pole of comparator (IC2B) connects the other end of R28, the negative pole of comparator (IC2C) connects the other end of (R29), comparator (IC2A), comparator (IC2B), the output of comparator (IC2C) connects described single-chip microcomputer respectively, electric capacity (C20) is connected across the positive pole and the negative pole of comparator (IC2A), resistance (R19), resistance (R20), one end of resistance (R21) connects comparator (IC2A) respectively, comparator (IC2B), the output of comparator (IC2C), resistance (R19), resistance (R20), another termination 5.6V voltage of resistance (R21).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101822592A CN101183846B (en) | 2006-11-14 | 2007-10-09 | Brushless motor control detecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610129403.1 | 2006-11-14 | ||
| CN200610129403 | 2006-11-14 | ||
| CN2007101822592A CN101183846B (en) | 2006-11-14 | 2007-10-09 | Brushless motor control detecting system |
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| CN101183846A true CN101183846A (en) | 2008-05-21 |
| CN101183846B CN101183846B (en) | 2012-10-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360613A (en) * | 2014-10-15 | 2015-02-18 | 诸暨中澳自动化设备有限公司 | Control circuit of intelligent electric tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360613A (en) * | 2014-10-15 | 2015-02-18 | 诸暨中澳自动化设备有限公司 | Control circuit of intelligent electric tool |
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| CN101183846B (en) | 2012-10-03 |
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Owner name: TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECHNOLOGY CO Free format text: FORMER OWNER: TIANJIN SANTROLL ELECTRONIC CO., LTD. Effective date: 20120725 |
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Effective date of registration: 20120725 Address after: 300308 No., West ten Avenue, Airport Economic Zone, Shanghai Applicant after: Tianjin Santroll Electric Automobile Technology Co., Ltd. Address before: 300308 No., West ten road, airport logistics processing zone, Shanghai Applicant before: Songzheng Electronics Co., Ltd., Tianjin City |
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Inventor after: Kong Zhaosong Inventor after: Zhao Jianhu Inventor after: He Yun Inventor after: Li Haoming Inventor before: Kong Zhaosong Inventor before: Zhao Jianhu Inventor before: He Yun Inventor before: Li Haoming |
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Granted publication date: 20121003 Termination date: 20181009 |