CN105356794A - PWM phase shift method applied to permanent-magnet brushless motor - Google Patents

PWM phase shift method applied to permanent-magnet brushless motor Download PDF

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Publication number
CN105356794A
CN105356794A CN201510803688.1A CN201510803688A CN105356794A CN 105356794 A CN105356794 A CN 105356794A CN 201510803688 A CN201510803688 A CN 201510803688A CN 105356794 A CN105356794 A CN 105356794A
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CN
China
Prior art keywords
tpmin
tpmax
tmin
pwm
pwm phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510803688.1A
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Chinese (zh)
Inventor
陈好
王志川
王晓杰
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Priority to CN201510803688.1A priority Critical patent/CN105356794A/en
Publication of CN105356794A publication Critical patent/CN105356794A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H02P6/14—Electronic commutators
    • 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
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/0077—Characterised by the use of a particular software algorithm
    • 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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/022—Synchronous motors
    • H02P25/03—Synchronous motors with brushless excitation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

The invention discloses a PWM phase shift method applied to a permanent-magnet brushless motor. With the PWM phase shift method, a problem that a sampling condition can not be met when the permanent-magnet brushless motor uses the single-resistor phase current reconstruction technology can be solved. The method is characterized in that an analysis on a single-phase volt-second balancing relation is carried out to obtain direct correction on modulating waves Ta, Tb, and Tc, thereby realizing a PWM phase shift conclusion. The method comprises: with combination of a two-level SVPWM algorithm, a section N, modulating waves Ta, Tb, and Tc, and cooperation time T1 and T2 are calculated; according to a relation between the cooperation time T1 and T2 and a sampling time Tmin, sampling condition division is carried out and assignment is carried out on two compensation dosages Tpmax and Tpmin; the located section N is determined and the modulating waves Ta, Tb, and Tc are corrected by combining the two compensation dosages Tpmax and Tpmin; and the corrected modulating waves Ta, Tb, and Tc are compared with a carrier wave and a PWM wave is generated, thereby realizing PWM phase shifting. According to the invention, compared with the existing PWM phase-shift method, the provided PWM phase shift method is simpler and is easy to implement; and the control performance of utilization of the single-resistor phase current reconstruction technology by the permanent-magnet brushless motor is improved and the cost is lowered.

Description

A kind of PWM phase-shifting method being applied to permanent magnetic brushless
Technical field
The present invention relates to PWM phase-shifting method, be specifically related to a kind of PWM phase-shifting method being applied to permanent magnetic brushless.
Background technology
The driving arrangement of electric bicycle adopts permanent magnetic brushless mostly, and permanent magnetic brushless current sample mainly contains the current sample and single resistance sampling two kinds of modes that adopt Hall element.Adopt the current sample cost of Hall element higher, the electric bicycle field be not suitable for cost requirement is lower adopts; Adopt the mode of single resistance sampling to there is the problem not meeting sampling condition, and existing solution PWM phase-shifting method algorithm is complicated, control effects is poor.
Summary of the invention
The object of the invention is to solve the problem, a kind of PWM phase-shifting method being applied to permanent magnetic brushless is provided, the method directly just can realize the phase shift of PWM to the correction of modulating wave Ta, Tb, Tc, simpler than existing PWM phase-shifting method, implement easily, improve the control performance that permanent magnetic brushless adopts single resistance phase current reconstruction technology, reduce cost.
The method comprises the following steps:
(1) in conjunction with the algorithm of two level SVPWMs, calculate sector N, modulating wave Ta, Tb, Tc, the cooperation time T1, T2;
(2) according to coordinating time T1, T2 and the relation of sampling time Tmin, carrying out the division of sampling condition and assignment is carried out to two compensation rate Tpmax, Tpmin;
(3) judge the sector N at place, in conjunction with two compensation rate Tpmax, Tpmin, modulating wave Ta, Tb, Tc are revised;
(4) corrected modulating wave Ta, Tb, Tc and carrier wave compare, and produce PWM ripple, realize the phase shift of PWM.
The division of the sampling condition in above-mentioned steps (2) and be to the formula that two compensation rate Tpmax, Tpmin carry out assignment:
As T1>=2*Tmin & & T2>=2*Tmin:
Tpmax=0;
Tpmin=0;
As T1>2*Tmin & & T2<2*Tmin:
Tpmax=Tmin-T2/2;
Tpmin=0;
As T1<2*Tmin & & T2>2*Tmin:
Tpmin=Tmin-T1/2;
Tpmax=0;
As T1<2*Tmin & & T2<2*Tmin:
Tpmin=Tmin-T1/2;
Tpmax=Tmin-T2/2。
Above-mentioned stating in step (3) to the formula that modulating wave Ta, Tb, Tc revise is:
As N=1:
Ta1=Ta-Tpmin;Ta2=Ta+Tpmin;
Tb1=Tb;Tb2=Tb;
Tc1=Tc+Tpmax;Tc2=Tc-Tpmax;
As N=2:
Ta1=Ta;Ta2=Ta;
Tb1=Tb-Tpmin;Tb2=Tb+Tpmin;
Tc1=Tc+Tpmax;Tc2=Tc-Tpmax;
As N=3:
Ta1=Ta+Tpmax;Ta2=Ta-Tpmax;
Tb1=Tb-Tpmin;Tb2=Tb+Tpmin;
Tc1=Tc;Tc2=Tc;
As N=4:
Ta1=Ta+Tpmax;Ta2=Ta-Tpmax;
Tb1=Tb;Tb2=Tb;
Tc1=Tc-Tpmin;Tc2=Tc+Tpmin;
As N=5:
Ta1=Ta;Ta2=Ta;
Tb1=Tb+Tpmax;Tb2=Tb-Tpmax;
Tc1=Tc-Tpmin;Tc2=Tc+Tpmin;
As N=6:
Ta1=Ta-Tpmin;Ta2=Ta+Tpmin;
Tb1=Tb+Tpmax;Tb2=Tb-Tpmax;
Tc1=Tc;Tc2=Tc。
Advantage of the present invention is simpler than existing PWM phase-shifting method, implements easily, improves the control performance that permanent magnetic brushless adopts single resistance phase current reconstruction technology, reduce cost.
Accompanying drawing explanation
Fig. 1 is a kind of flow chart being applied to the PWM phase-shifting method of permanent magnetic brushless of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
See Fig. 1.Be applied to a PWM phase-shifting method for permanent magnetic brushless, comprise the following steps:
(1) in conjunction with the algorithm of two level SVPWMs, calculate sector N, modulating wave Ta, Tb, Tc, the cooperation time T1, T2;
(2) according to coordinating time T1, T2 and the relation of sampling time Tmin, carry out the division of sampling condition and carry out assignment to two compensation rate Tpmax, Tpmin, the formula carrying out assignment is:
As T1>=2*Tmin & & T2>=2*Tmin:
Tpmax=0;
Tpmin=0;
As T1>2*Tmin & & T2<2*Tmin:
Tpmax=Tmin-T2/2;
Tpmin=0;
As T1<2*Tmin & & T2>2*Tmin:
Tpmin=Tmin-T1/2;
Tpmax=0;
As T1<2*Tmin & & T2<2*Tmin:
Tpmin=Tmin-T1/2;
Tpmax=Tmin-T2/2;
(3) judge the sector N at place, in conjunction with two compensation rate Tpmax, Tpmin, revise modulating wave Ta, Tb, Tc, the formula carrying out revising is:
As N=1:
Ta1=Ta-Tpmin;Ta2=Ta+Tpmin;
Tb1=Tb;Tb2=Tb;
Tc1=Tc+Tpmax;Tc2=Tc-Tpmax;
As N=2:
Ta1=Ta;Ta2=Ta;
Tb1=Tb-Tpmin;Tb2=Tb+Tpmin;
Tc1=Tc+Tpmax;Tc2=Tc-Tpmax;
As N=3:
Ta1=Ta+Tpmax;Ta2=Ta-Tpmax;
Tb1=Tb-Tpmin;Tb2=Tb+Tpmin;
Tc1=Tc;Tc2=Tc;
As N=4:
Ta1=Ta+Tpmax;Ta2=Ta-Tpmax;
Tb1=Tb;Tb2=Tb;
Tc1=Tc-Tpmin;Tc2=Tc+Tpmin;
As N=5:
Ta1=Ta;Ta2=Ta;
Tb1=Tb+Tpmax;Tb2=Tb-Tpmax;
Tc1=Tc-Tpmin;Tc2=Tc+Tpmin;
As N=6:
Ta1=Ta-Tpmin;Ta2=Ta+Tpmin;
Tb1=Tb+Tpmax;Tb2=Tb-Tpmax;
Tc1=Tc;Tc2=Tc;
(4) corrected modulating wave Ta, Tb, Tc and carrier wave compare, and produce PWM ripple, realize the phase shift of PWM.

Claims (3)

1. be applied to a PWM phase-shifting method for permanent magnetic brushless, it is characterized in that, the method comprises the following steps:
(1) in conjunction with the algorithm of two level SVPWMs, calculate sector N, modulating wave Ta, Tb, Tc, the cooperation time T1, T2;
(2) according to coordinating time T1, T2 and the relation of sampling time Tmin, carrying out the division of sampling condition and assignment is carried out to two compensation rate Tpmax, Tpmin;
(3) judge the sector N at place, in conjunction with two compensation rate Tpmax, Tpmin, modulating wave Ta, Tb, Tc are revised;
(4) corrected modulating wave Ta, Tb, Tc and carrier wave compare, and produce PWM ripple, realize the phase shift of PWM.
2. a kind of PWM phase-shifting method being applied to permanent magnetic brushless according to claim 1, is characterized in that, the division of the sampling condition in described step (2) and be to the formula that two compensation rate Tpmax, Tpmin carry out assignment:
As T1>=2*Tmin & & T2>=2*Tmin:
Tpmax=0;
Tpmin=0;
As T1>2*Tmin & & T2<2*Tmin:
Tpmax=Tmin-T2/2;
Tpmin=0;
As T1<2*Tmin & & T2>2*Tmin:
Tpmin=Tmin-T1/2;
Tpmax=0;
As T1<2*Tmin & & T2<2*Tmin:
Tpmin=Tmin-T1/2;
Tpmax=Tmin-T2/2。
3. a kind of PWM phase-shifting method being applied to permanent magnetic brushless according to claim 1, is characterized in that, in described step (3) to the formula that modulating wave Ta, Tb, Tc revise is:
As N=1:
Ta1=Ta-Tpmin;Ta2=Ta+Tpmin;
Tb1=Tb;Tb2=Tb;
Tc1=Tc+Tpmax;Tc2=Tc-Tpmax;
As N=2:
Ta1=Ta;Ta2=Ta;
Tb1=Tb-Tpmin;Tb2=Tb+Tpmin;
Tc1=Tc+Tpmax;Tc2=Tc-Tpmax;
As N=3:
Ta1=Ta+Tpmax;Ta2=Ta-Tpmax;
Tb1=Tb-Tpmin;Tb2=Tb+Tpmin;
Tc1=Tc;Tc2=Tc;
As N=4:
Ta1=Ta+Tpmax;Ta2=Ta-Tpmax;
Tb1=Tb;Tb2=Tb;
Tc1=Tc-Tpmin;Tc2=Tc+Tpmin;
As N=5:
Ta1=Ta;Ta2=Ta;
Tb1=Tb+Tpmax;Tb2=Tb-Tpmax;
Tc1=Tc-Tpmin;Tc2=Tc+Tpmin;
As N=6:
Ta1=Ta-Tpmin;Ta2=Ta+Tpmin;
Tb1=Tb+Tpmax;Tb2=Tb-Tpmax;
Tc1=Tc;Tc2=Tc。
CN201510803688.1A 2015-11-20 2015-11-20 PWM phase shift method applied to permanent-magnet brushless motor Pending CN105356794A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510803688.1A CN105356794A (en) 2015-11-20 2015-11-20 PWM phase shift method applied to permanent-magnet brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publication Number Publication Date
CN105356794A true CN105356794A (en) 2016-02-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110336479A (en) * 2019-06-12 2019-10-15 合肥工业大学 Three level NPC inverter switching devices monitor period modulating wave Reconstruction Method on-line
CN110858757A (en) * 2018-08-21 2020-03-03 广东威灵汽车部件有限公司 Current control and sampling method, device and computer readable storage medium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917157A (en) * 2010-07-29 2010-12-15 东元总合科技（杭州）有限公司 Method for reconstructing phase current of electromotor
CN102320252A (en) * 2011-06-27 2012-01-18 杭州阔博科技有限公司 Control method of electric bicycle
CN103023414A (en) * 2013-01-23 2013-04-03 南京航空航天大学 Low-cost quick reconstruction method for phase current of permanent magnet motor of fan
CN103199791A (en) * 2013-04-15 2013-07-10 中颖电子股份有限公司 Three-phase current reconstruction method using single sampling resistance
EP2852047A1 (en) * 2012-08-15 2015-03-25 Shenzhen INVT Electric Co., Ltd. Phase current reconstruction method and apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917157A (en) * 2010-07-29 2010-12-15 东元总合科技（杭州）有限公司 Method for reconstructing phase current of electromotor
CN102320252A (en) * 2011-06-27 2012-01-18 杭州阔博科技有限公司 Control method of electric bicycle
EP2852047A1 (en) * 2012-08-15 2015-03-25 Shenzhen INVT Electric Co., Ltd. Phase current reconstruction method and apparatus
CN103023414A (en) * 2013-01-23 2013-04-03 南京航空航天大学 Low-cost quick reconstruction method for phase current of permanent magnet motor of fan
CN103199791A (en) * 2013-04-15 2013-07-10 中颖电子股份有限公司 Three-phase current reconstruction method using single sampling resistance

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
F. BLAABJERG等: "Single current sensor technique in the DC link of three-phase PWM-VS inverters: a review and a novel solution", 《 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS》 *
HOJOON SHIN等: "Phase Current Reconstructions from DC-Link Currents in Three-Phase Three-Level PWM Inverters", 《 IEEE TRANSACTIONS ON POWER ELECTRONICS》 *
YIKUN GU等: "A novel phase current reconstruction method using a single DC-link current sensor", 《 MECHATRONICS AND AUTOMATION, 2009.ICMA 2009. INTERNATIONAL CONFERENCE ON》 *
储剑波等: "一种变频器相电流采样重构技术", <电工技术学报> *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110858757A (en) * 2018-08-21 2020-03-03 广东威灵汽车部件有限公司 Current control and sampling method, device and computer readable storage medium
CN110858757B (en) * 2018-08-21 2022-05-24 广东威灵汽车部件有限公司 Current control and sampling method, device and computer readable storage medium
CN110336479A (en) * 2019-06-12 2019-10-15 合肥工业大学 Three level NPC inverter switching devices monitor period modulating wave Reconstruction Method on-line

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Application publication date: 20160224