CN107070317A - A kind of brshless DC motor PWM method based on two or three mixing conductings - Google Patents
A kind of brshless DC motor PWM method based on two or three mixing conductings Download PDFInfo
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- CN107070317A CN107070317A CN201710295708.8A CN201710295708A CN107070317A CN 107070317 A CN107070317 A CN 107070317A CN 201710295708 A CN201710295708 A CN 201710295708A CN 107070317 A CN107070317 A CN 107070317A
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- Prior art keywords
- conductings
- motor
- switching tube
- brshless
- mixing
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
Abstract
The invention discloses a kind of brshless DC motor PWM method based on two or three mixing conductings, the drive signal of two or three mixing conduction mode switching tubes is synthesized with the hall signal and dsp chip computing of brshless DC motor, 150 degree of conduction modes are constructed；150 degree of conduction modes are i.e. in the running of motor, and each switching tube turns on 150 degree, and allow its stable operation；Two or three mixing conductings will repartition sector, as each electrical angle of sector 30 in 12 sectors；By three or three turn on during switching tube drive signal add PWM, i.e. switching tube modulated signal and high frequency square wave do and logical operation, the signal after logical operation as switching tube drive signal；Switching tube Continuity signal does not do any logical operation so being Heng Tong during two or two conductings.Invention increases brushless dc set modulation mode, the advantage of the conducting of two or two conducting three or three and PWM is combined.
Description
Technical field
It is especially a kind of based on the conducting of brshless DC motor two or two and three the present invention relates to brshless DC motor control field
Three conductings and PWM method.
Background technology
Brshless DC motor is high with its power density, and speed adjusting performance is excellent increasingly to be paid close attention to by people.Current scholar
Mostly research brshless DC motor conduction mode two-by-two and based on the PWM mode turned on two-by-two, to three or three conducting sides
The research of formula and two or three mixing conductings is less.Two or two conduction modes are exactly 120 degree of conduction modes, and three or three conductings are exactly that 180 degree is led
Logical mode, two or three mixing conductings are 150 degree of conductings.
The PWM mode of brshless DC motor mainly has five kinds of modes, as PWM-ON, ON-PWM, HPWM-LON,
HON-LPWM,HPWM-LPWM.And this five kinds of modulation systems are combined with two or two conductings, research PWM is mixed with two or three
It is less that conjunction conducting is combined, so the PWM-ON-PWM-ON-PWM modulation systems based on two or three mixing conductings are arisen at the historic moment.
The content of the invention
Present invention aims at provide a kind of abundant electric machine speed regulation control mode, brshless DC motor is preferably played effect
The brshless DC motor PWM method based on two or three mixing conductings of power.
To achieve the above object, following technical scheme is employed：The invention mainly comprises with 180 degree hall position sensing
The brshless DC motor and dsp chip of device, the modulator approach comprise the following steps：
Step 1, synthesize two or three mixing conduction modes with the hall signal and dsp chip computing of brshless DC motor to open
The drive signal of pipe is closed, 150 degree of conduction modes are constructed；150 degree of conduction modes are i.e. in the running of motor, each switch
Pipe turns on 150 degree, and allows its stable operation；
Step 2, two or three mixing conductings will repartition sector, as each electrical angle of sector 30 in 12 sectors；
The result that each switching tube turns on 150 electrical angles is exactly that brshless DC motor two or two conductings and three or three conducting phases occurs
The phenomenon mutually intersected；In the case of 150 degree of conductings of brshless DC motor, there are the feelings that two or two conductings and three or three conductings intersect
Condition, that is, every the conducting of 30 electrical angles two or two, next 30 electrical angle three or three is turned on；
Step 3, the drive signal of the switching tube during three or three are turned on adds the modulated signal of PWM, i.e. switching tube
Done with high frequency square wave and logical operation, the signal after logical operation as switching tube drive signal；Opened during two or two conductings
Close pipe Continuity signal and do not do any logical operation so being Heng Tong.
Further, in step 2, it is exactly, by six common sectors, to be refined as ten that two or three 12 sectors of mixing conducting, which are divided,
Two sectors, each electrical angle of sector 30.
Compared with prior art, the inventive method has the following advantages that：The pattern of two or three mixing conductings is employed, is introduced
PWM strategy can reduce the torque pulsation of brshless DC motor, and six traditional sectors are divided and are improved to 12 sectors stroke
Point.Under identical electric power thus supplied, rotating speed is slightly larger than the rotating speed in the case of the conducting of six sectors two or two.Abundant electric machine speed regulation controlling party
Formula, brshless DC motor is set preferably to play effect.
Brief description of the drawings
Fig. 1 is that the present invention two or two turns on hall signal and switching tube conducting situation map.
Fig. 2 is that the present invention three or three turns on hall signal and switching tube conducting situation map.
Fig. 3 is that the present invention two or two turns on sector division figure.
Fig. 4 is that the present invention three or three turns on sector division figure.
Fig. 5 is the mixing 12 sector division figures of conducting of the present invention two or three.
Fig. 6 is the mixing of the present invention two or three conducting hall signal and switching tube conducting situation map.
Fig. 7 is that the present invention three or three turns on drive signal and high frequency square wave logic chart.
Fig. 8 is the inventive method drive waveforms figure.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
Present invention aims on the basis of existing brushless DC motor control system, believed using dsp chip and Hall
Number, by the direct logical sum DSP of hall signal timing and computing, each switching tube is turned on 150 electrical angles.Form nothing
The pattern of the mixing conducting of brushless motor two or three, then the Continuity signal of switching tube during the conducting of motor three or three is added into PWM,
Form PWM-ON-PWM-ON-PWM modulation new methods.
As shown in figure 1, it is the state of three-phase six that brshless DC motor is turned on two-by-two, it refers to there was only two work(at any one time
Rate switching tube is in the conduction state, every 60 degree of electrical angles, and motor changes one action state, and each switching tube is sequentially turned on
120 degree of electrical angles.The turn-on sequence of switching tube be VT1, VT2 → VT2, VT3 → VT3, VT4 → VT4, VT5 → VT5, VT6 →
VT6、VT1。
As shown in Fig. 2 the conducting of brshless DC motor three or three is the state of three-phase six, it refers to there are three work(at any one time
Rate switching tube is in the conduction state, every 60 degree of electrical angles, and motor changes one action state, and each switching tube is sequentially turned on
180 degree electrical angle.The turn-on sequence of switching tube be VT1, VT2, VT3 → VT2, VT3, VT4 → VT3, VT4, VT5 → VT4, VT5,
VT6→VT5、VT6、VT1→VT6、VT1、VT2。
As shown in Figure 3 and Figure 4, because two or two conductings and three or three conductings have two kinds of different switching tube conducting combinations, formed
Two groups each six, the different voltage vector in direction.The present invention is exactly in the cycle turned in brshless DC motor, while utilizing this
12 vectors.So it is formed as shown in Figure 5, the sector dividing mode of brshless DC motor 12.I.e. every 30 electric angles
Spend running status conversion once, 30 electrical angles because each voltage vector of two or two conductings and three or three conductings staggers just,
Two or three mixing conductings are 12 sectors.
As shown in fig. 6, introducing after 12 sector partitioning methods, brshless DC motor, which is changed into the two-state two or three of three-phase ten, to be mixed
Conducting is closed, it refers to three or three 30 electrical angles of conducting after two or two 30 electrical angles of conducting, every 30 electrical angle conducting state occurs once to become
Change, ten two-states come therefrom, and each switching tube sequentially turns on 150 electrical angles.The turn-on sequence of switching tube is VT5, VT6
→VT1、VT5、VT6→VT1、VT6→VT1、VT2、VT6→VT1、VT2→VT1、VT2、VT3→VT2、VT3→VT2、VT3、
VT4→VT3、VT4→VT3、VT4、VT5→VT4、VT5→VT4、VT5、VT6.So each 150 degree of brshless DC motor is led
It is logical, this 150 electrical angle naturally be divided into five parts.
As shown in fig. 7, the switching tube Continuity signal and high frequency square wave during three or three are turned on do logical AND, formation is high
The frequency square wave brshless DC motor PWM tri- three conducting drive signal alternate with low level.Three or three conducting PWM drive signals are just
It is that three switching tubes for participating in three or three conductings all carry out PWM chopping modulations.Such as 30 degree -60 degree VT1, VT5, VT6 driving letter
Number whole and high frequency square wave do logical AND.With signal of the signal after logic as final driving switch pipe.
Fig. 8 is the driving ripple of each switching tube based on two or three mixing conducting brshless DC motor PWM new methods
Shape figure, 150 degree are divided into 5 parts every part 30 electrical angles, and all switching tubes carry out the PWM (frequency of actual PWM ripples during three or three conductings
Rate is higher than shown in Fig. 8), switching tube Heng Tong during two or two conductings realizes PWM-ON-PWM-ON-PWM form.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
In various modifications and improvement that case is made, the protection domain that claims of the present invention determination all should be fallen into.
Claims (2)
1. a kind of brshless DC motor PWM method based on two or three mixing conductings, main to include carrying 180 degree hall position
The brshless DC motor and dsp chip of sensor, it is characterised in that the modulator approach comprises the following steps：
Step 1, two or three mixing conduction mode switching tubes are synthesized with the hall signal and dsp chip computing of brshless DC motor
Drive signal, construct 150 degree of conduction modes；150 degree of conduction modes are i.e. in the running of motor, and each switching tube is led
Logical 150 degree, and allow its stable operation；
Step 2, two or three mixing conductings will repartition sector, as each electrical angle of sector 30 in 12 sectors；
The result that each switching tube turns on 150 electrical angles is exactly the conducting of brshless DC motor appearance two or two and three or three conductings mutually friendship
The phenomenon of fork；In the case of 150 degree of conductings of brshless DC motor, there is the situation that two or two conductings and three or three conductings intersect,
It is exactly that, every the conducting of 30 electrical angles two or two, next 30 electrical angle three or three is turned on；
Step 3, the drive signal of the switching tube during three or three are turned on adds the modulated signal and height of PWM, i.e. switching tube
Frequency square wave is done and logical operation, the signal after logical operation as switching tube drive signal；Switching tube during two or two conductings
Continuity signal does not do any logical operation so being Heng Tong.
2. a kind of brshless DC motor PWM method based on two or three mixing conductings according to claim 1, its feature
It is：In step 2, it is exactly, by six common sectors, to be refined as 12 sectors that two or three 12 sectors of mixing conducting, which are divided, each fan
The electrical angle of area 30.
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| CN201710295708.8A CN107070317A (en) | 2017-04-28 | 2017-04-28 | A kind of brshless DC motor PWM method based on two or three mixing conductings |
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| CN201710295708.8A CN107070317A (en) | 2017-04-28 | 2017-04-28 | A kind of brshless DC motor PWM method based on two or three mixing conductings |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713949A (en) * | 2018-12-28 | 2019-05-03 | 武汉工程大学 | A kind of suppressing method and system of torque pulsation of brushless DC motor |
| CN111654210A (en) * | 2020-06-19 | 2020-09-11 | 内蒙古科技大学 | Brushless direct current motor electric power generation integrated smooth control method and system |
| CN113890428A (en) * | 2021-11-17 | 2022-01-04 | 江苏科技大学 | Brushless direct current motor control method for inhibiting torque ripple through multi-step phase commutation |
| CN114006556A (en) * | 2021-11-04 | 2022-02-01 | 江苏科技大学 | Control system for reducing square wave operation torque pulsation of brushless direct current motor |
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| US5780986A (en) * | 1995-03-02 | 1998-07-14 | Hewlett-Packard Company | Soft switching, PWM controller and method for reducing torque ripple in multiphase DC motor |
| CN101242154A (en) * | 2008-03-14 | 2008-08-13 | 重庆大学 | A built-in permanent magnetic brushless DC motor control system for no position sensor |
| CN102025305A (en) * | 2010-12-07 | 2011-04-20 | 南京邮电大学 | Hall phase sequence detecting method and device of brushless direct-current motor |
| CN105703681A (en) * | 2015-11-16 | 2016-06-22 | 江苏大学 | Dodecagonal flux linkage self-control direct torque control method of brushless DC motor |
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2017
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Patent Citations (4)
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| US5780986A (en) * | 1995-03-02 | 1998-07-14 | Hewlett-Packard Company | Soft switching, PWM controller and method for reducing torque ripple in multiphase DC motor |
| CN101242154A (en) * | 2008-03-14 | 2008-08-13 | 重庆大学 | A built-in permanent magnetic brushless DC motor control system for no position sensor |
| CN102025305A (en) * | 2010-12-07 | 2011-04-20 | 南京邮电大学 | Hall phase sequence detecting method and device of brushless direct-current motor |
| CN105703681A (en) * | 2015-11-16 | 2016-06-22 | 江苏大学 | Dodecagonal flux linkage self-control direct torque control method of brushless DC motor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713949A (en) * | 2018-12-28 | 2019-05-03 | 武汉工程大学 | A kind of suppressing method and system of torque pulsation of brushless DC motor |
| CN109713949B (en) * | 2018-12-28 | 2020-05-22 | 武汉工程大学 | Method and system for suppressing torque ripple of brushless direct current motor |
| CN111654210A (en) * | 2020-06-19 | 2020-09-11 | 内蒙古科技大学 | Brushless direct current motor electric power generation integrated smooth control method and system |
| CN114006556A (en) * | 2021-11-04 | 2022-02-01 | 江苏科技大学 | Control system for reducing square wave operation torque pulsation of brushless direct current motor |
| WO2023078017A1 (en) * | 2021-11-04 | 2023-05-11 | 江苏科技大学 | Control system for reducing square-wave-operating torque ripple of brushless direct-current motor |
| CN113890428A (en) * | 2021-11-17 | 2022-01-04 | 江苏科技大学 | Brushless direct current motor control method for inhibiting torque ripple through multi-step phase commutation |
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