CN105929259B - A kind of Brushless DC Motor Position sensor phase sequence judging circuit and determination method - Google Patents
A kind of Brushless DC Motor Position sensor phase sequence judging circuit and determination method Download PDFInfo
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- CN105929259B CN105929259B CN201610414631.7A CN201610414631A CN105929259B CN 105929259 B CN105929259 B CN 105929259B CN 201610414631 A CN201610414631 A CN 201610414631A CN 105929259 B CN105929259 B CN 105929259B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
Abstract
The present invention discloses a kind of Brushless DC Motor Position sensor phase sequence judging circuit, sinusoidal magnitude reduces circuit and the amplitude of sine wave is reduced to back-emf signal between 3 unknown position sensor signals and B phases and A phases by the clamper of two diodes respectively, so that circuit is more stablized by voltage follower；Sine wave turns the sine wave that circuit and square-wave reduces amplitude and forms square wave by the turn-on and turn-off of voltage comparator and 2 positive anti-paralleled diodes, then so that voltage is reduced to the signal identified by microcontroller by the limit of two diodes；Failing edge trigger circuit realizes failing edge triggering by microcontroller 81C50, once input terminal detects failing edge, then enter and interrupt, judge the height of the level of another input end signal, indicator light on the output is bright to judge the phase sequence of position sensor by connecting.Such circuit can simply judge the phase sequence of position sensor.Invention additionally discloses a kind of Brushless DC Motor Position sensor phase sequence determination methods.
Description
Technical field
The invention belongs to brshless DC motor technical field, more particularly to a kind of phase of Brushless DC Motor Position sensor
Sequence decision circuit and its judgment method.
Background technology
Position sensor is a kind of magnetic field sensor made according to Hall effect (a kind of magnetoelectric effect).Hall voltage with
The variation of magnetic field intensity and change, magnetic field is stronger, and voltage is higher, and magnetic field is weaker, and voltage is lower.Letter of this magnetic field as detection
Many non-electrical, non-magnetic physical quantity can be transformed into electricity to be detected and control by the carrier of breath by it.
Invention content
The purpose of the present invention is to provide a kind of Brushless DC Motor Position sensor phase sequence judging circuit and judgement side
Method can simply judge the phase sequence of position sensor.
In order to achieve the above objectives, solution of the invention is：
A kind of Brushless DC Motor Position sensor phase sequence judging circuit, including the sinusoidal magnitude being linked in sequence reduce electricity
Road, sine wave turn circuit and square-wave and failing edge trigger circuit, and sinusoidal magnitude reduces by 3 unknown positions that circuit is used to input
Set back-emf signal e between sensor signal and B phases and A phasesBARespectively by the clamper of two diodes by the width of sine wave
Value reduces, and so that circuit is more stablized by voltage follower；The sine wave turns sine of the circuit and square-wave for reducing amplitude
Wave forms square wave, then the limit by two diodes by the turn-on and turn-off of voltage comparator and 2 positive anti-paralleled diodes
Position makes voltage be reduced to the signal identified by microcontroller；Under the failing edge trigger circuit is realized by microcontroller 81C50
Drop is along triggering, once one of input terminal detects failing edge, then enters and interrupts, call interruption subroutine, pass through judgement
The height of the level of another input end signal, by connecting, indicator light on the output is bright to judge the phase of position sensor
Sequence.
Above-mentioned sinusoidal magnitude reduces circuit by the 15th to the 18th diode, first resistor, the 5th resistance, and the 11st
Resistance, twelfth resistor, the first potentiometer, the second potentiometer, third operational amplifier and four-operational amplifier composition, connect
It is connected in：One end of first, second potentiometer is anti-between 3 position sensor signals and B phases and A phases for the unknown input that interlocks
Electromotive force signal eBA, one end of the other end ground connection of the first potentiometer, the sliding end of the first potentiometer and eleventh resistor connects,
The other end of eleventh resistor respectively with the anode of the 15th diode, anode, the third operational amplifier of the 16th diode
In-phase input end connection, cathode connection+10V power supplys of the 15th diode, and the cathode connection -10V of the 16th diode
Power supply, inverting input and the output end short circuit of third operational amplifier, and it is commonly connected to one end of first resistor, the first electricity
The other end of resistance reduces an output end of circuit as sinusoidal magnitude；The other end of second potentiometer is grounded, the second current potential
One end of the sliding end of device and twelfth resistor connects, the other end of twelfth resistor respectively with the anode of the 17th diode,
The in-phase input end connection of the anode, four-operational amplifier of 18th diode, the cathode connection+10V of the 17th diode
Power supply, and the cathode connection -10V power supplys of the 18th diode, inverting input and the output end short circuit of four-operational amplifier,
And it is commonly connected to one end of the 5th resistance, the other end of the 5th resistance reduces another output of circuit as sinusoidal magnitude
End.
Above-mentioned sine wave turns circuit and square-wave by the first operational amplifier, second operational amplifier, the first to the 8th diode,
Second to the 4th resistance and the 6th to the 8th resistance composition, are connected as：The moon of the anode of first diode, the second diode
Pole is connect with the in-phase input end of the first operational amplifier, and turns an input terminal of circuit and square-wave collectively as sine wave, the
The inverting input of one operational amplifier respectively with the cathode of the first diode, the anode of the second diode, second resistance one
End is connected, the other end of second resistance ground connection, the output end of the first operational amplifier via 3rd resistor connection+15V power supplys, and
The output end of first operational amplifier is also connected with one end of the 4th resistance, the other end of the 4th resistance respectively with the 4th diode
The anode connection of anode, third diode, and turn as sine wave an output end of circuit and square-wave, the cathode of the 4th diode
Connection+10V power supplys, the minus earth of third diode；The anode of 6th diode, the cathode of the 5th diode and the second operation
The in-phase input end of amplifier connects, and turns another input terminal of circuit and square-wave, the second operation amplifier collectively as sine wave
The inverting input of device is connect with the cathode of the 6th diode, the anode of the 5th diode, one end of the 6th resistance respectively, and the 6th
The other end of resistance is grounded, and the output end of second operational amplifier is via the 7th resistance connection+15V power supplys, and the second operation is put
The output end of big device is also connected with one end of the 8th resistance, the other end of the 8th resistance respectively with the anode of the 7th diode, the 8th
The anode of diode connects, and turns another output end of circuit and square-wave as sine wave, and the cathode connection of the 7th diode+
10V power supplys, the minus earth of the 8th diode.
Above-mentioned failing edge trigger circuit is by microcontroller 80C51, the 9th resistance, the tenth resistance, the 9th indicator light and the tenth
Indicator lamp groups are at being connected as：The first, second input pin of microcontroller 80C51 is separately connected sine wave and turns circuit and square-wave
Output end, the first I/O interfaces of microcontroller 80C51 connect one end of the 9th indicator light via the 9th resistance, the 9th indicator light
The other end is grounded, and the 2nd I/O interfaces of microcontroller 80C51 connect one end of the tenth indicator light, the tenth instruction via the tenth resistance
The other end of lamp is grounded.
A kind of determination method based on foregoing Brushless DC Motor Position sensor phase sequence judging circuit, including such as
Lower step：
(1) back-emf signal e between the second input pin input B phases and A phases of microcontroller 80C51BA, first input draw
Castor stream inputs 3 position sensor signals H1, H2, H3, works as eBAFailing edge occurs, and the second input pin detects this decline
Edge then enters interruption subroutine, and at this time when the 9th indicator light is bright, that indicate input is H3, is gone to step (2)；
(2) back-emf signal e between the first input pin input B phases and A phases of microcontroller 80C51BA, second input draw
Castor stream inputs 2 position sensor signals H1, H2 not yet judging, when the failing edge of position sensor signal occurs, second
Input pin detects this failing edge, then enters interruption subroutine, if the 9th indicator light is bright at this time, that indicate input is H1, if
Tenth indicator light is bright, and that indicate input is H2.
After adopting the above scheme, the present invention can simply judge the phase sequence of position sensor, and circuit is simple and practical, stability
It is good.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention；
Fig. 2 is the principle of the present invention block diagram；
Fig. 3 is the flow chart of the present invention.
Specific implementation mode
Below with reference to attached drawing, technical scheme of the present invention and advantageous effect are described in detail.
As shown in Figure 1, the present invention provides a kind of Brushless DC Motor Position sensor phase sequence judging circuit, including sequentially connect
The sinusoidal magnitude connect reduces circuit, sine wave turns circuit and square-wave and failing edge trigger circuit, introduces separately below.
The sinusoidal magnitude reduce unknown 3 position sensor signals and B phases and A phases that circuit is used to input it
Between back-emf signal eBAThe amplitude of sine wave is reduced by the clamper of two diodes respectively, electricity is made by voltage follower
More stablize on road.
The sinusoidal magnitude reduces circuit specifically by 4 diode D15, D16, D17, D18,4 resistance R1, R5,
R11, R12,2 potentiometers RV1, RV2 and 2 operational amplifier U3:A、U3:B is formed, and is connected as：Potentiometer RV1, RV2
One end for staggeredly unknown input 3 position sensor signals and eBA, the other end ground connection of potentiometer RV1, potentiometer RV1
Sliding end connect with one end of resistance R11, the other end of resistance R11 respectively with the anode of diode D15, diode D16
Anode, operational amplifier U3:The in-phase input end of A connects, the cathode connection+10V power supplys of diode D15, and diode D16
Cathode connection -10V power supplys, operational amplifier U3:The inverting input of A and output end short circuit, and it is commonly connected to resistance R1's
One end；The other end of potentiometer RV2 is grounded, and the sliding end of potentiometer RV2 is connect with one end of resistance R12, and resistance R12's is another
End respectively with the anode of diode D17, the anode of diode D18, operational amplifier U3:The in-phase input end of B connects, diode
Cathode connection+10V the power supplys of D17, and the cathode connection -10V power supplys of diode D18, operational amplifier U3:The anti-phase input of B
End and output end short circuit, and it is commonly connected to one end of resistance R5.
The sine wave turns sine wave of the circuit and square-wave for reducing amplitude and passes through voltage comparator and 2 positive inverse parallels
The turn-on and turn-off of diode form square wave, then make voltage drop as low as can be identified by microcontroller by the limits of two diodes
Signal.
The sine wave turns circuit and square-wave specifically by 2 operational amplifier U1:A、U1:B, 8 diode D1, D2, D3,
D4, D5, D6, D7, D8 and 6 resistance R2, R3, R4, R6, R7, R8 compositions, are connected as：The other end of resistance R1 respectively with
The anode of diode D1, the cathode of diode D2, operational amplifier U1:The in-phase input end of A connects, operational amplifier U1:A's
Inverting input is connected with one end of the cathode of diode D1, the anode of diode D2, resistance R2 respectively, the other end of resistance R2
Ground connection, operational amplifier U1:The output end of A is via resistance R3 connection+15V power supplys, and operational amplifier U1:The output end of A is also
One end of resistance R4 is connected, the other end of resistance R4 is connect with the anode of the anode of diode D4, diode D3 respectively, diode
Cathode connection+10V the power supplys of D4, the minus earth of diode D3；In another incoming line, the other end of resistance R5 is distinguished
With the anode of diode D6, the cathode of diode D5, operational amplifier U1:The in-phase input end of B connects, operational amplifier U1:B
Inverting input connect respectively with one end of the cathode of diode D6, the anode of diode D5, resistance R6, resistance R6's is another
End ground connection, operational amplifier U1:The output end of B is via resistance R7 connection+15V power supplys, and operational amplifier U1:The output end of B
It is also connected with one end of resistance R8, the other end of resistance R8 is connect with the anode of the anode of diode D7, diode D8 respectively, two poles
Cathode connection+10V the power supplys of pipe D7, the minus earth of diode D8.
The failing edge trigger circuit realizes failing edge triggering by microcontroller 81C50, once one of input terminal
It detects failing edge, then enters and interrupt, calling interruption subroutine, the height of the level by judging another input end signal,
Judge the phase sequence of position sensor by connecting indicator light bright (it is opposite that two indicator lights must be set) on the output.
The failing edge trigger circuit is specifically by microcontroller 80C51,2 resistance R9, R10 and 2 indicator lights D9, D10
Composition, is connected as：The first input pin P3.2 of the other end connection microcontroller 80C51 of resistance R4, the other end of resistance R8
The second input pin P3.3 of microcontroller 80C51 is connected, the first I/O interfaces P1.0 of microcontroller 80C51 is via resistance R9 connections
One end of indicator light D9, the other end ground connection of indicator light D9, the 2nd I/O interfaces P1.1 of microcontroller 80C51 connect via resistance R10
Connect one end of indicator light D10, the other end ground connection of indicator light D10.
As shown in Fig. 2, the operation principle of the present invention is：First respectively by 3 unknown position sensor signals and eBAIt carries out
Compare.Signal inputs two-by-two, and bright by indicator light judges.First, eBAAs CLK signal, work as eBAFailing edge occurs, 3
It is high level that position sensor signal, which only has H3, i.e., when D9 is bright, it can be determined that is gone out, it is H3 to access at this time；Similarly, it excludes
H3, the e that will be judged beforeBAIt is compared with remaining 2 position sensor signals, at this point, remaining 2 position sensors
Signal is as CLK signal, as the appearance of H1 failing edges, eBAFor high level, i.e., when D9 is bright, it can be determined that go out, it is H1 to access at this time,
As the appearance of H2 failing edges, eBAFor low level, i.e., when D10 is bright, it can be determined that go out, it is H2 to access at this time.
Wherein, R9, R10 prevent indicator light D9, D10 from being damaged since dash current is excessive, but necessary as protective resistance
Notice that this resistance value can not be excessive, it is excessive if indicator light may can not be bright because the electric current flowed through is too small.
Based on the above decision circuit, the present invention also provides a kind of Brushless DC Motor Position sensor phase sequence determination method,
Coordinate shown in Fig. 3, e firstBAAs CLK signal, that is, it is connected on the clock signal terminal of whole system test failing edge signal, separately
One input terminal inputs H1, H2, H3 in turn.Work as eBAFailing edge occurs, and the P3.3 of microcontroller 81C50 detects this failing edge, then
Into interruption subroutine, the level of P3.2 is judged at this time, if P3.2 level is height, P1.0 outputs are that 1, P1.1 outputs are 0, i.e.,
D9 is bright, if P3.2 level is low, P1.0 outputs are that 0, P1.1 outputs are 1, i.e. D10 is bright.According to the light on and off of lamp, can first determine
H3.Similarly, after excluding H3, by eBAIt is compared with remaining 2 position sensor signals H1, H2, at this point, remaining 2
Position sensor signal H1, H2 are inputted in turn as CLK signal, and another input terminal inputs eBA, work as position sensor signal
Failing edge occur, the P3.3 of microcontroller 81C50 detects this failing edge, then enters interruption subroutine, judge P3.2's at this time
Level, if P3.2 level is height, P1.0 outputs are that 1, P1.1 outputs are 0, i.e. D9 is bright, if P3.2 level is low, P1.0 is defeated
It is 1 to go out for 0, P1.1 outputs, i.e. D10 is bright.According to the light on and off of lamp, it may be determined that H1 and H2.
Above example is merely illustrative of the invention's technical idea, and protection scope of the present invention cannot be limited with this, every
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within the scope of the present invention
Within.
Claims (5)
1. a kind of Brushless DC Motor Position sensor phase sequence judging circuit, it is characterised in that：Including the sine wave being linked in sequence
Amplitude reduces circuit, sine wave turns circuit and square-wave and failing edge trigger circuit, and sinusoidal magnitude reduces what circuit was used to input
Back-emf signal e between 3 unknown position sensor signals and B phases and A phasesBAIt respectively will by the clamper of two diodes
The amplitude of sine wave reduces, and so that circuit is more stablized by voltage follower；The sine wave turns circuit and square-wave and is used for amplitude
The sine wave of reduction forms square wave by the turn-on and turn-off of voltage comparator and 2 positive anti-paralleled diodes, then passes through two
The limit of diode makes voltage be reduced to the signal identified by microcontroller；The failing edge trigger circuit passes through microcontroller
81C50 realizes failing edge triggering, once one of input terminal detects failing edge, then enters and interrupts, call and interrupt sub- journey
Sequence, the height of the level by judging another input end signal are bright come decision bits by the indicator light of connection on the output
Set the phase sequence of sensor.
2. a kind of Brushless DC Motor Position sensor phase sequence judging circuit as described in claim 1, it is characterised in that：It is described
Sinusoidal magnitude reduces circuit by the 15th to the 18th diode, first resistor, the 5th resistance, eleventh resistor, and the 12nd
Resistance, the first potentiometer, the second potentiometer, third operational amplifier and four-operational amplifier composition, are connected as：The first,
One end of second potentiometer is for staggeredly back-emf signal between 3 position sensor signals and B phases and A phases of unknown input
eBA, one end of the other end ground connection of the first potentiometer, the sliding end of the first potentiometer and eleventh resistor connects, eleventh resistor
The other end homophase input with the anode of the 15th diode, the anode of the 16th diode, third operational amplifier respectively
End connection, the cathode connection+10V power supplys of the 15th diode, and the cathode connection -10V power supplys of the 16th diode, third fortune
The inverting input and output end short circuit of amplifier are calculated, and is commonly connected to one end of first resistor, the other end of first resistor
An output end of circuit is reduced as sinusoidal magnitude；The other end of second potentiometer is grounded, the sliding end of the second potentiometer
Connect with one end of twelfth resistor, the other end of twelfth resistor respectively with the anode of the 17th diode, the 18th pole
The in-phase input end connection of the anode, four-operational amplifier of pipe, the cathode connection+10V power supplys of the 17th diode, and the tenth
Cathode connection -10V the power supplys of eight diodes, inverting input and the output end short circuit of four-operational amplifier, and connect jointly
To one end of the 5th resistance, the other end of the 5th resistance reduces another output end of circuit as sinusoidal magnitude.
3. a kind of Brushless DC Motor Position sensor phase sequence judging circuit as described in claim 1, it is characterised in that：It is described
Sine wave turns circuit and square-wave by the first operational amplifier, second operational amplifier, the first to the 8th diode, the second to the 4th electricity
Resistance and the 6th to the 8th resistance composition, are connected as：The anode of first diode, the cathode of the second diode and the first operation
The in-phase input end of amplifier connects, and turns an input terminal of circuit and square-wave, the first operational amplifier collectively as sine wave
Inverting input be connected respectively with one end of the cathode of the first diode, the anode of the second diode, second resistance, second electricity
The other end of resistance is grounded, and the output end of the first operational amplifier is via 3rd resistor connection+15V power supplys, and the first operation amplifier
The output end of device is also connected with one end of the 4th resistance, the other end of the 4th resistance respectively with the anode of the 4th diode, the three or two
The anode of pole pipe connects, and turns an output end of circuit and square-wave as sine wave, the cathode connection+10V electricity of the 4th diode
Source, the minus earth of third diode；The anode of 6th diode, the cathode of the 5th diode and second operational amplifier it is same
Phase input terminal connects, and turns another input terminal of circuit and square-wave collectively as sine wave, and the reverse phase of second operational amplifier is defeated
Enter end connect respectively with the cathode of the 6th diode, the anode of the 5th diode, one end of the 6th resistance, the 6th resistance it is another
End ground connection, the output end of second operational amplifier is via the 7th resistance connection+15V power supplys, and the output of second operational amplifier
End is also connected with one end of the 8th resistance, the other end of the 8th resistance respectively with the anode of the 7th diode, the sun of the 8th diode
Pole connects, and turns another output end of circuit and square-wave as sine wave, the cathode connection+10V power supplys of the 7th diode, and the 8th
The minus earth of diode.
4. a kind of Brushless DC Motor Position sensor phase sequence judging circuit as described in claim 1, it is characterised in that：It is described
Failing edge trigger circuit by microcontroller 80C51, the 9th resistance, the tenth resistance, the 9th indicator light and the tenth indicator lamp groups at,
It is connected as：The first, second input pin of microcontroller 80C51 is separately connected the output end that sine wave turns circuit and square-wave, microcontroller
The first I/O interfaces of 80C51 connect one end of the 9th indicator light via the 9th resistance, and the other end ground connection of the 9th indicator light is single
The 2nd I/O interfaces of piece machine 80C51 connect one end of the tenth indicator light, another termination of the tenth indicator light via the tenth resistance
Ground.
5. a kind of phase sequence judgement side based on Brushless DC Motor Position sensor phase sequence judging circuit as claimed in claim 4
Method, it is characterised in that include the following steps：
(1) back-emf signal e between the second input pin input B phases and A phases of microcontroller 80C51BA, the first input pin wheel
Stream input 3 position sensor signals H1, H2, H3, work as eBAFailing edge occurs, and the second input pin detects this failing edge, then
Into interruption subroutine, at this time when the 9th indicator light is bright, that indicate input is H3, is gone to step (2)；
(2) back-emf signal e between the first input pin input B phases and A phases of microcontroller 80C51BA, the second input pin wheel
2 position sensor signals H1, H2 that stream input not yet judges, when the failing edge of position sensor signal occurs, second inputs
Pin detects this failing edge, then enters interruption subroutine, if the 9th indicator light is bright at this time, that indicate input is H1, if the tenth
Indicator light is bright, and that indicate input is H2.
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| CN201610414631.7A CN105929259B (en) | 2016-06-14 | 2016-06-14 | A kind of Brushless DC Motor Position sensor phase sequence judging circuit and determination method |
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| CN201610414631.7A CN105929259B (en) | 2016-06-14 | 2016-06-14 | A kind of Brushless DC Motor Position sensor phase sequence judging circuit and determination method |
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| CN105929259B true CN105929259B (en) | 2018-09-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19909706A1 (en) * | 1999-03-05 | 2000-09-07 | Heidenhain Gmbh Dr Johannes | Method and circuit arrangement for mapping the mains voltage for regenerative supply devices |
| CN2706769Y (en) * | 2004-06-04 | 2005-06-29 | 北京超同步科技有限公司 | Frequency change power frequency phase detector |
| CN102095945B (en) * | 2010-12-07 | 2013-04-10 | 广州三晶电气有限公司 | Open-phase detection device for digital three-phase alternating-current phase sequence and detection method thereof |
| US9255954B2 (en) * | 2013-07-22 | 2016-02-09 | Gregory Hubert Piesinger | Method and apparatus for phase identification in a three-phase power distribution network using servers |
| CN103592515B (en) * | 2013-11-21 | 2016-10-05 | 厦门安达兴电气集团有限公司 | universal phase identifier |
| CN204228836U (en) * | 2014-11-26 | 2015-03-25 | 刘敏 | A kind of phase order of 3-phase AC indicator |
| CN205210195U (en) * | 2015-11-27 | 2016-05-04 | 深圳市英威腾电气股份有限公司 | Three -phase AC phase sequence detection circuit |
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Effective date of registration: 20180802 Address after: 201608 Ye Xin road 1008, Ye Xie Town, Songjiang District, Shanghai. Applicant after: Shanghai upper force Explosion-proof Motor Group Co., Ltd. Address before: 212003 Mengxi Road, Jingkou District, Zhenjiang, Jiangsu Province, No. 2 Applicant before: Jiangsu University of Science and Technology |
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