CN105929259A - Phase sequence determining circuit and method of position sensor of brushless DC motor - Google Patents
Phase sequence determining circuit and method of position sensor of brushless DC motor Download PDFInfo
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- CN105929259A CN105929259A CN201610414631.7A CN201610414631A CN105929259A CN 105929259 A CN105929259 A CN 105929259A CN 201610414631 A CN201610414631 A CN 201610414631A CN 105929259 A CN105929259 A CN 105929259A
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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
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Abstract
The invention discloses a phase sequence determining circuit of a position sensor of a brushless DC motor. A sine wave amplitude reducing circuit reduces the sine-wave amplitude of three unknown position sensor signals and a back electromotive force signal between the phase B and the phase A via clamping positions of two diodes, and a voltage follower makes the circuit more stable; a sine wave to square wave conversion circuit converts amplitude reduced sine waves into square waves by connecting and disconnecting a voltage comparator and two diodes in parallel connection oppositely, and the voltage is reduced to a signal that can be identified by a single-chip microprocessor via limiting of the two diodes; and a falling edge triggering circuit realizes falling edge triggering via the single-chip microprocessor 81C50, input is stopped once falling edge is detected in the input end, the level of signal of the other input end is determined, and an indicating lamp connected to the output end is used to determine the phase sequence of the position sensor. The circuit can determine the phase sequence of the position sensor simply. The invention also discloses a phase sequence determining method of the phase sensor of the brushless DC motor.
Description
Technical field
The invention belongs to brshless DC motor technical field, the phase sequence particularly to a kind of Brushless DC Motor Position sensor judges
Circuit and determination methods thereof.
Background technology
Position sensor is a kind of magnetic field sensor made according to Hall effect (a kind of magnetoelectric effect).Hall voltage is with magnetic field
The change of intensity and change, magnetic field is the strongest, and voltage is the highest, and magnetic field is the most weak, and voltage is the lowest.This magnetic field is as the information of detection
Carrier, many non-electrical, the physical quantity of non-magnetic can be transformed into electricity and detect and control by it.
Summary of the invention
The purpose of the present invention, is to provide a kind of Brushless DC Motor Position sensor phase sequence judging circuit and determination methods, and it can
The simple phase sequence judging position sensor.
In order to reach above-mentioned purpose, the solution of the present invention is:
A kind of Brushless DC Motor Position sensor phase sequence judging circuit, reduces circuit, just including the sinusoidal magnitude being linked in sequence
String ripple turns circuit and square-wave and trailing edge triggers circuit, and sinusoidal magnitude reduces circuit for by 3 unknown position sensings of input
Back-emf signal e between device signal and B phase with A phaseBABy the clamper of two diodes, sinusoidal wave amplitude is reduced respectively,
Make circuit more stable by voltage follower；Described sine wave turns circuit and square-wave for the sine wave that amplitude reduces is passed through voltage
The turn-on and turn-off of comparator and 2 positive anti-paralleled diodes form square wave, then make voltage reduce by the spacing of two diodes
Arriving can be by the signal of single-chip microcomputer identification；Described trailing edge triggers circuit and realizes trailing edge triggering by single-chip microcomputer 81C50, once
One of them input detects trailing edge, then enter interruption, call interruption subroutine, by judging that another input is believed
Number the height of level, by connecting the bright phase sequence judging position sensor of display lamp on the output.
Above-mentioned sinusoidal magnitude reduces circuit by the 15th to the 18th diode, the first resistance, the 5th resistance, the 11st resistance,
12nd resistance, the first potentiometer, the second potentiometer, the 3rd operational amplifier and four-operational amplifier form, and it is connected as:
One end of first, second potentiometer is the most electronic between 3 position sensor signals and B phase with the A phase of the unknown input that interlocks
Gesture signal eBA, the other end ground connection of the first potentiometer, the sliding end of the first potentiometer and one end connection of the 11st resistance, the tenth
The other end of one resistance respectively with the anode of the 15th diode, the anode of the 16th diode, the homophase of the 3rd operational amplifier
Input connects, and the negative electrode of the 15th diode connects+10V power supply, and the negative electrode of the 16th diode connects-10V power supply, the
The inverting input of three operational amplifiers and outfan short circuit, and be commonly connected to one end of the first resistance, another of the first resistance
Hold the outfan reducing circuit as sinusoidal magnitude；The other end ground connection of the second potentiometer, the sliding end of the second potentiometer
Be connected with one end of the 12nd resistance, the other end of the 12nd resistance respectively with anode, the 18th diode of the 17th diode
Anode, the in-phase input end of four-operational amplifier connect, the negative electrode of the 17th diode connects+10V power supply, and the 18th
The negative electrode of diode connects-10V power supply, the inverting input of four-operational amplifier and outfan short circuit, and is commonly connected to the
One end of five resistance, the other end of the 5th resistance reduces another outfan of circuit as sinusoidal magnitude.
Above-mentioned sine wave turns circuit and square-wave by the first operational amplifier, the second operational amplifier, the first to the 8th diode, and second
Forming to the 4th resistance and the 6th to the 8th resistance, it is connected as: the anode of the first diode, the second diode negative electrode with
The in-phase input end of the first operational amplifier connects, and turns an input of circuit and square-wave, the first computing collectively as sine wave
The inverting input of amplifier is connected with the negative electrode of the first diode, the anode of the second diode, one end of the second resistance respectively,
The other end ground connection of the second resistance, the outfan of the first operational amplifier connects+15V power supply, and the first computing via the 3rd resistance
The outfan of amplifier 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 3rd
The anode of diode connects, and turns an outfan of circuit and square-wave as sine wave, and the negative electrode of the 4th diode connects+10V electricity
Source, the minus earth of the 3rd diode；The anode of the 6th diode, the negative electrode of the 5th diode and the second operational amplifier same
Phase input connects, and turns another input of circuit and square-wave, the anti-phase input of the second operational amplifier collectively as sine wave
End is connected with the negative electrode of the 6th diode, the anode of the 5th diode, one end of the 6th resistance respectively, the other end of the 6th resistance
Ground connection, the outfan of the second operational amplifier connects+15V power supply via the 7th resistance, and the outfan of the second operational amplifier is also
Connecting one end of the 8th resistance, the other end of the 8th resistance is connected with anode, the anode of the 8th diode of the 7th diode respectively,
And another outfan of circuit and square-wave is turned as sine wave, the negative electrode of the 7th diode connects+10V power supply, the 8th diode
Minus earth.
Above-mentioned trailing edge triggers circuit by single-chip microcomputer 80C51, the 9th resistance, the tenth resistance, the 9th display lamp and the tenth instruction
Lamp forms, and it is connected as: first, second input pin of single-chip microcomputer 80C51 connects sine wave respectively and turns the output of circuit and square-wave
End, an I/O interface of single-chip microcomputer 80C51 connects one end of the 9th display lamp, another of the 9th display lamp via the 9th resistance
End ground connection, the 2nd I/O interface of single-chip microcomputer 80C51 connects one end of the tenth display lamp via the tenth resistance, the tenth display lamp
Other end ground connection.
A kind of decision method based on foregoing Brushless DC Motor Position sensor phase sequence judging circuit, comprises the steps:
(1) back-emf signal e between the second input pin input B phase and the A phase of single-chip microcomputer 80C51BA, the first input is drawn
Castor stream input 3 position sensor signals H1, H2, H3, work as eBATrailing edge occurs, the second input pin detects under this
Fall edge, then enter interruption subroutine, and now when the 9th display lamp is bright, that represent input is H3, goes to step (2)；
(2) back-emf signal e between the first input pin input B phase and the A phase of single-chip microcomputer 80C51BA, the second input is drawn
Castor stream inputs 2 position sensor signals H1, the H2 not yet judged, when the trailing edge of position sensor signal occurs, and second
Input pin detects this trailing edge, then enter interruption subroutine, if now the 9th display lamp is bright, that represent input is H1, if
Tenth display lamp is bright, and that represent input is H2.
After using such scheme, the present invention can simply judge the phase sequence of position sensor, and circuit is simple and practical, good stability.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the present invention；
Fig. 2 is the theory diagram of the present invention；
Fig. 3 is the flow chart of the present invention.
Detailed description of the invention
Below with reference to accompanying drawing, technical scheme and beneficial effect are described in detail.
As it is shown in figure 1, the present invention provides a kind of Brushless DC Motor Position sensor phase sequence judging circuit, including be linked in sequence
Sinusoidal magnitude reduces circuit, sine wave turns circuit and square-wave and trailing edge triggers circuit, introduces separately below.
It is anti-between by unknown 3 position sensor signals and B phase with the A phase of input that described sinusoidal magnitude reduces circuit
Electromotive force signal eBABy the clamper of two diodes, sinusoidal wave amplitude is reduced respectively, make circuit more by voltage follower
Stable.
Described sinusoidal magnitude reduces circuit specifically by 4 diodes D15, D16, D17, D18,4 resistance R1, R5, R11,
R12,2 potentiometers RV1, RV2 and 2 operational amplifiers U3:A, U3:B form, and it is connected as: potentiometer RV1,
One end of RV2 is for 3 position sensor signals of unknown input and the e of interlockingBA, the other end ground connection of potentiometer RV1, current potential
The sliding end of device RV1 is connected with one end of resistance R11, the other end of resistance R11 respectively with anode, two poles of diode D15
The anode of pipe D16, the in-phase input end of operational amplifier U3:A connect, and the negative electrode of diode D15 connects+10V power supply, and
The negative electrode of diode D16 connects-10V power supply, the inverting input of operational amplifier U3:A and outfan short circuit, and jointly connects
It is connected to one end of resistance R1；The other end ground connection of potentiometer RV2, the sliding end of potentiometer RV2 is connected with one end of resistance R12,
The other end of resistance R12 respectively with the anode of diode D17, the anode of diode D18, operational amplifier U3:B homophase defeated
Entering end to connect, the negative electrode of diode D17 connects+10V power supply, and the negative electrode of diode D18 connects-10V power supply, operation amplifier
The inverting input of device U3:B and outfan short circuit, and it is commonly connected to one end of resistance R5.
Described sine wave turns circuit and square-wave and passes through voltage comparator and 2 positive anti-paralleled diodes for sine wave amplitude reduced
Turn-on and turn-off form square wave, then make voltage be reduced to by two diodes spacing can be by the signal of single-chip microcomputer identification.
Described sine wave turns circuit and square-wave specifically by 2 operational amplifiers U1:A, U1:B, 8 diode D1, D2, D3, D4,
D5, D6, D7, D8 and 6 resistance R2, R3, R4, R6, R7, R8 form, and it is connected as: the other end of resistance R1
It is connected with the anode of diode D1, the negative electrode of diode D2, the in-phase input end of operational amplifier U1:A respectively, operation amplifier
The inverting input of device U1:A is connected with the negative electrode of diode D1, the anode of diode D2, one end of resistance R2 respectively, electricity
The other end ground connection of resistance R2, the outfan of operational amplifier U1:A connects+15V power supply, and operational amplifier via resistance R3
The outfan of U1:A is also connected with one end of resistance R4, the other end of resistance R4 respectively with anode, the diode D3 of diode D4
Anode connect, the negative electrode of diode D4 connects+10V power supply, the minus earth of diode D3；In another incoming line,
The other end of resistance R5 respectively with the anode of diode D6, the negative electrode of diode D5, the homophase input of operational amplifier U1:B
End connects, the inverting input of operational amplifier U1:B respectively with the negative electrode of diode D6, the anode of diode D5, resistance
One end of R6 connects, the other end ground connection of resistance R6, and the outfan of operational amplifier U1:B connects+15V electricity via resistance R7
Source, and the outfan of operational amplifier U1:B is also connected with one end of resistance R8, the other end of resistance R8 respectively with diode D7
Anode, the anode of diode D8 connect, the negative electrode of diode D7 connects+10V power supply, the minus earth of diode D8.
Described trailing edge triggers circuit and realizes trailing edge triggering by single-chip microcomputer 81C50, and once one of them input detects
Trailing edge, then enter interruption, call interruption subroutine, by judging the height of the level of another input end signal, by even
Connect display lamp on the output bright (two display lamps must be set contrary) and judge the phase sequence of position sensor.
Described trailing edge triggers circuit specifically by single-chip microcomputer 80C51,2 resistance R9, R10 and 2 display lamp D9, D10 groups
Becoming, it is connected as: the other end of resistance R4 connects the first input pin P3.2 of single-chip microcomputer 80C51, the other end of resistance R8
Connect an I/O interface P1.0 of the second input pin P3.3, single-chip microcomputer 80C51 of single-chip microcomputer 80C51 via resistance R9 even
Connecing one end of display lamp D9, the other end ground connection of display lamp D9, the 2nd I/O interface P1.1 of single-chip microcomputer 80C51 is via resistance
R10 connects one end of display lamp D10, the other end ground connection of display lamp D10.
As in figure 2 it is shown, the operation principle of the present invention is: the most respectively by 3 unknown position sensor signals and eBACompare.
Signal input two-by-two, bright by display lamp judges.First, eBAAs CLK signal, work as eBATrailing edge occurs, 3
Position sensor signal only has H3 to be high level, i.e. bright as D9, it can be determined that to go out, now access for H3；In like manner, get rid of
Fall H3, the e that will judge beforeBACompare with remaining 2 position sensor signals, now, remaining 2 positions
Sensor signal is as CLK signal, when H1 trailing edge occurs, eBAFor high level, i.e. bright as D9, it can be determined that to go out, now
Access for H1, when H2 trailing edge occurs, eBAFor low level, i.e. bright as D10, it can be determined that to go out, now access for H2.
Wherein, R9, R10, as protective resistance, prevent display lamp D9, D10 excessive and damage due to dash current, but necessary
Notice that this resistance value can not be excessive, excessive if display lamp may cannot be bright because the electric current flow through is too small.
Based on above decision circuit, the present invention also provides for a kind of Brushless DC Motor Position sensor phase sequence decision method, coordinates figure
Shown in 3, first eBAAs CLK signal, namely it is connected on the clock signal terminal of whole system test trailing edge signal, another
Input inputs H1, H2, H3 in turn.Work as eBATrailing edge occurs, the P3.3 of single-chip microcomputer 81C50 detects this trailing edge, then
Entering interruption subroutine, now judge the level of P3.2, if P3.2 level is high, then P1.0 is output as 1, and P1.1 is output as
0, i.e. D9 is bright, if P3.2 level is low, then P1.0 is output as 0, and P1.1 is output as 1, i.e. D10 is bright.Bright according to lamp
Go out, can first determine H3.In like manner, after excluding H3, by eBACarry out with remaining 2 position sensor signals H1, H2
Relatively, now, remaining 2 position sensor signals H1, H2 input in turn as CLK signal, and another input is defeated
Enter eBA, when the trailing edge of position sensor signal occurs, the P3.3 of single-chip microcomputer 81C50 detects this trailing edge, then in entering
Disconnected subprogram, now judges the level of P3.2, if P3.2 level is high, then P1.0 is output as 1, and P1.1 is output as 0, i.e.
D9 is bright, if P3.2 level is low, then P1.0 is output as 0, and P1.1 is output as 1, i.e. D10 is bright.According to the light on and off of lamp, can
To determine H1 and H2.
Above example is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this, every according to this
The technological thought that invention proposes, any change done on the basis of technical scheme, within each falling within scope.
Claims (5)
1. a Brushless DC Motor Position sensor phase sequence judging circuit, it is characterised in that: include the sine wave being linked in sequence
Amplitude reduces circuit, sine wave turns circuit and square-wave and trailing edge triggers circuit, and sinusoidal magnitude reduces circuit for by input not
Back-emf signal e between 3 position sensor signals and B phase with the A phase knownBARespectively will just by the clamper of two diodes
The amplitude of string ripple reduces, and makes circuit more stable by voltage follower；Described sine wave turns circuit and square-wave for amplitude being reduced
Sine wave form square wave by the turn-on and turn-off of voltage comparator and 2 positive anti-paralleled diodes, then by two diodes
Spacing make voltage be reduced to by the signal of single-chip microcomputer identification；Described trailing edge is triggered circuit and is realized by single-chip microcomputer 81C50
Trailing edge triggers, and once one of them input detects trailing edge, then enter interruption, call interruption subroutine, by sentencing
The height of the level of another input end signal disconnected, by connecting the bright phase judging position sensor of display lamp on the output
Sequence.
2. a kind of Brushless DC Motor Position sensor phase sequence judging circuit as claimed in claim 1, it is characterised in that: institute
State sinusoidal magnitude and reduce circuit by the 15th to the 18th diode, the first resistance, the 5th resistance, the 11st resistance, the tenth
Two resistance, the first potentiometer, the second potentiometer, the 3rd operational amplifier and four-operational amplifier form, and it is connected as: the
One, one end of the second potentiometer counter electromotive force between 3 position sensor signals and B phase with the A phase of the unknown input that interlocks
Signal eBA, the other end ground connection of the first potentiometer, the sliding end of the first potentiometer and one end connection of the 11st resistance, the 11st
The other end of resistance respectively with the anode of the 15th diode, the anode of the 16th diode, the 3rd operational amplifier homophase defeated
Enter end to connect, the negative electrode connection+10V power supply of the 15th diode, and the negative electrode of the 16th diode connection-10V power supply, the 3rd
The inverting input of operational amplifier and outfan short circuit, and it is commonly connected to one end of the first resistance, the other end of the first resistance
An outfan of circuit is reduced as sinusoidal magnitude；The other end ground connection of the second potentiometer, the sliding end of the second potentiometer with
One end of 12nd resistance connects, the other end of the 12nd resistance respectively with the anode of the 17th diode, the 18th diode
Anode, the in-phase input end of four-operational amplifier connect, the negative electrode connection+10V power supply of the 17th diode, and the 18th
The negative electrode of pole pipe connects-10V power supply, the inverting input of four-operational amplifier and outfan short circuit, and is commonly connected to the 5th
One end of resistance, the other end of the 5th resistance reduces another outfan of circuit as sinusoidal magnitude.
3. a kind of Brushless DC Motor Position sensor phase sequence judging circuit as claimed in claim 1, it is characterised in that: institute
State sine wave and turn circuit and square-wave by the first operational amplifier, the second operational amplifier, the first to the 8th diode, second to the 4th
Resistance and the 6th to the 8th resistance form, and it is connected as: the anode of the first diode, the negative electrode of the second diode and the first fortune
The in-phase input end calculating amplifier connects, and turns an input of circuit and square-wave, the first operational amplifier collectively as sine wave
Inverting input be connected with the negative electrode of the first diode, the anode of the second diode, one end of the second resistance respectively, the second electricity
The other end ground connection of resistance, the outfan of the first operational amplifier connects+15V power supply, and the first operational amplifier via the 3rd resistance
Outfan be also connected with one end of the 4th resistance, the other end of the 4th resistance respectively with anode, the 3rd diode of the 4th diode
Anode connect, and turn an outfan of circuit and square-wave as sine wave, the negative electrode of the 4th diode connects+10V power supply, the
The minus earth of three diodes；The homophase input of the anode of the 6th diode, the negative electrode of the 5th diode and the second operational amplifier
End connects, and turns another input of circuit and square-wave collectively as sine wave, and the inverting input of the second operational amplifier is respectively
It is connected with the negative electrode of the 6th diode, the anode of the 5th diode, one end of the 6th resistance, the other end ground connection of the 6th resistance,
The outfan of the second operational amplifier connects+15V power supply via the 7th resistance, and the outfan of the second operational amplifier is also connected with the
One end of eight resistance, the other end of the 8th resistance is connected with anode, the anode of the 8th diode of the 7th diode respectively, and makees
Turn another outfan of circuit and square-wave for sine wave, the negative electrode of the 7th diode connects+10V power supply, the negative electrode of the 8th diode
Ground connection.
4. a kind of Brushless DC Motor Position sensor phase sequence judging circuit as claimed in claim 1, it is characterised in that: institute
State trailing edge triggering circuit to be made up of single-chip microcomputer 80C51, the 9th resistance, the tenth resistance, the 9th display lamp and the tenth display lamp,
It is connected as: first, second input pin of single-chip microcomputer 80C51 connects sine wave respectively and turns the outfan of circuit and square-wave, monolithic
The oneth I/O interface of machine 80C51 via the 9th resistance connect the 9th display lamp one end, the other end ground connection of the 9th display lamp,
The 2nd I/O interface of single-chip microcomputer 80C51 connects one end of the tenth display lamp via the tenth resistance, another termination of the tenth display lamp
Ground.
5. a decision method based on Brushless DC Motor Position sensor phase sequence judging circuit as claimed in claim 4,
It is characterized in that comprising the steps:
(1) back-emf signal e between the second input pin input B phase and the A phase of single-chip microcomputer 80C51BA, the first input is drawn
Castor stream input 3 position sensor signals H1, H2, H3, work as eBATrailing edge occurs, the second input pin detects under this
Fall edge, then enter interruption subroutine, and now when the 9th display lamp is bright, that represent input is H3, goes to step (2)；
(2) back-emf signal e between the first input pin input B phase and the A phase of single-chip microcomputer 80C51BA, the second input is drawn
Castor stream inputs 2 position sensor signals H1, the H2 not yet judged, when the trailing edge of position sensor signal occurs, and second
Input pin detects this trailing edge, then enter interruption subroutine, if now the 9th display lamp is bright, that represent input is H1, if
Tenth display lamp is bright, and that represent input is H2.
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| Application Number | Priority Date | Filing Date | Title |
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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 CN105929259B (en) | 2018-09-21 |
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| US6181582B1 (en) * | 1999-03-05 | 2001-01-30 | Dr. Johannes Heidenhain Gmbh | Method and circuit arrangement for generating a representation of the supply voltage in a frequency converter |
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| CN102095945A (en) * | 2010-12-07 | 2011-06-15 | 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 |
| CN103592515A (en) * | 2013-11-21 | 2014-02-19 | 厦门安达兴电气集团有限公司 | Universal phase identifier |
| US20150022180A1 (en) * | 2013-07-22 | 2015-01-22 | Gregory Hubert Piesinger | Method and Apparatus for Phase Identification in a Three-Phase Power Distribution Network using Servers |
| 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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- 2016-06-14 CN CN201610414631.7A patent/CN105929259B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6181582B1 (en) * | 1999-03-05 | 2001-01-30 | Dr. Johannes Heidenhain Gmbh | Method and circuit arrangement for generating a representation of the supply voltage in a frequency converter |
| 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 |
| CN102095945A (en) * | 2010-12-07 | 2011-06-15 | 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 |
| US20150022180A1 (en) * | 2013-07-22 | 2015-01-22 | Gregory Hubert Piesinger | Method and Apparatus for Phase Identification in a Three-Phase Power Distribution Network using Servers |
| CN103592515A (en) * | 2013-11-21 | 2014-02-19 | 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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| Publication number | Publication date |
|---|---|
| CN105929259B (en) | 2018-09-21 |
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