CN103731081A - Method for determining optimal time constant of three-phase asynchronous motor rotor - Google Patents
Method for determining optimal time constant of three-phase asynchronous motor rotor Download PDFInfo
- Publication number
- CN103731081A CN103731081A CN201310743256.7A CN201310743256A CN103731081A CN 103731081 A CN103731081 A CN 103731081A CN 201310743256 A CN201310743256 A CN 201310743256A CN 103731081 A CN103731081 A CN 103731081A
- Authority
- CN
- China
- Prior art keywords
- ref
- moment
- torsion
- current
- time constant
- 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.)
- Granted
Links
Images
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The invention provides a method for determining an optimal time constant of a three-phase asynchronous motor rotor. The method includes the step s11 of setting a rotor time constant reference value tau[r]_ref, the step s12 of selecting an excitation current value id and a corresponding torque current value iq, wherein at the moment, iq=id; the step s13 of calculating the slip ratio Ws=iq/(tau[r]_ref*id) at the moment, the step s14 of conducting vector control, the step s15 of judging whether the torque progressively increases or not, the step s16 of enabling tau[r]_ref to be equal to tau[r]_ref plus delta tau[r] if the torque progressively increases, and executing the step s13 again, wherein delta tau[r] is the increment; the step s17 of determining the optimal time constant tau[r] which is equal to tau[r]_ref if the torque does not progressively increase. According to the method, the defects in the prior art are overcome, the executing efficiency of software is improved, the characteristics of parameter dynamic changes is also taken into consideration, and the method can be easily achieved in terms of projects under the condition that efficient output of a system is ensured.
Description
Technical field
The present invention relates to a kind of phase asynchronous copper casting rotor rotor optimal time determination of the constants method.
Background technology
Threephase asynchronous is as electric automobile traction electric machine, and so that its stable performance, cost be lower etc., advantage has determined will occupy a tiny space in following electric automobile field.Yet its efficiency often, lower than the permagnetic synchronous motor of Same Efficieney grade, becomes so improve the efficiency of the whole control system of asynchronous machine the focus of paying close attention in the industry.
In Vector Control System of Induction Motor process, a very crucial parameter is exactly rotor time constant.Rotor time constant is participated in the calculating of slip directly, and slip is that the synchronous angle of calculating is indispensable, and it is a very important parameter that determines motor output torque size simultaneously, so the definite of rotor time constant seems most important.
Because the calculating of rotor time constant is relevant with rotor resistance with the inductance value of motor, if respectively motor inductance and rotor resistance are tested respectively, recycling rotor time constant formula calculates, do so not only implement very complicated, and the test condition of two parameters can not be identical, utilize the result of computing can cause the inaccurate of parameter testing.Lot of domestic and international scholar also proposes various solutions for this difficult problem, comprise that parameter off-line is adjusted certainly, on-line identification, but in actual engineering practice, should avoid complicated algorithm as far as possible, assess the cost too high, affect the speed of processor, can reduce the real-time of system, when serious, may cause normally moving.
Summary of the invention
The technical problem that time constant is inaccurate or algorithm is too complicated of determining method measuring and calculating for solving existing threephase asynchronous machine rotor time constant, the present invention proposes a kind of threephase asynchronous machine rotor optimal time determination of the constants method.
Threephase asynchronous machine rotor optimal time determination of the constants method of the present invention,
When magnetic field reaches capacity before state, described optimal time determination of the constants method comprises the steps:
Step s11: a given rotor time constant reference value τ
r_ ref;
Step s12: selected exciting current value id and corresponding moment of torsion current value iq, now iq=id;
Step s13: calculate revolutional slip Ws=iq/ (τ now
r_ ref*id);
Step s14: carry out vector control;
Step s15: judge whether moment of torsion increases progressively;
Step s16: if moment of torsion increases progressively, make τ
r_ ref=τ
r_ ref+ Δ τ
r, wherein, Δ τ
rfor recruitment; Perform step again s13;
Step s17: if moment of torsion does not increase progressively, determine optimal time constant τ
r=τ
r_ ref.
Further, when magnetic field reaches capacity after state, described optimal time determination of the constants method comprises the steps:
Step s21: reach capacity after state in magnetic field, limit exciting current id and remain unchanged, exciting current id is now optimal exciting electric current I
m;
Step s22: given stator current is_ref;
Step s23: calculate corresponding moment of torsion current i q=sqrt (is_ref^2-id^2);
Step s24: calculate revolutional slip Ws=iq/ (τ now
r_ ref*id);
Step s25: carry out vector control;
Step s26: judge whether moment of torsion increases progressively;
Step s27: if moment of torsion increases progressively, make τ
r_ ref=τ
r_ ref+ Δ τ
r, wherein, Δ τ
rfor recruitment; Perform step again s24;
Step s28: if moment of torsion does not increase progressively, determine optimal time constant τ
r=τ
r_ ref.
Further, described optimal time determination of the constants method comprises optimal exciting electric current I
mdefinite method, comprise the steps:
Step s31: under rated speed, given rated secondary current is and exciting current reference value id_ref;
Step s32: calculate corresponding moment of torsion current i q=sqrt (is^2-id_ref^2);
Step s33: carry out vector control;
Step s34: judge whether moment of torsion increases progressively;
Step s35: if moment of torsion increases progressively, make id_ref=id_ref+ Δ id, wherein, Δ id is recruitment; Perform step again s32;
Step s36: if moment of torsion does not increase progressively, determine optimal exciting electric current I
m=id_ref.
The present invention has following beneficial effect: the present invention be take system and obtained maximal efficiency and determine rotor time constant as starting point, avoided loaded down with trivial details parameter identification process, method with experiment, from integral body, take peak torque current ratio as target, find optimum slip corresponding under different exciting current condition, then change the matching relationship of moment of torsion electric current and exciting current, instead release real rotor time constant, so just obtained the dynamic value of different exciting electric current lower rotor part time constant.The present invention has overcome the defect of prior art, a kind of new rotor time constant method of testing has been proposed, adopt the experimental calibration method of off-line type to carry out the measurement of parameter, make dynamic relationship form, improve the execution efficiency of software, take into account again the characteristic that dynamic state of parameters changes, guaranteeing, under the condition of system high efficiency rate output, in engineering, also to possess the advantage easily realizing.
Accompanying drawing explanation
Fig. 1 is for being motor excitation electric current and moment of torsion currents match graph of relation;
Fig. 2 is the flow chart that in embodiment of the present invention copper casting rotor rotor optimal time determination of the constants method, optimal exciting electric current is determined method;
Fig. 3 is the flow chart of the saturated front rotor optimal time determination of the constants method in magnetic field in the embodiment of the present invention;
Fig. 4 is the flow chart of rotor optimal time determination of the constants method when magnetic field is saturated in the embodiment of the present invention.
Each meaning of parameters in Fig. 1-4:
Id is exciting current,
I
mfor optimal exciting electric current,
Iq is moment of torsion electric current,
Is is stator winding phase current,
Id_ref is given exciting current reference,
Is_ref is given stator current reference value,
Ws is revolutional slip,
τ
rfor rotor time constant,
τ
r_ ref is given rotor time constant reference value.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, the control of copper casting rotor asynchronous machine needs given suitable exciting current and moment of torsion electric current, before magnetic field does not reach capacity, can increase exciting current, increases the effect in magnetic field, under the effect of same torque electric current, increases moment of torsion output.But along with the increase of exciting current, magnetic field can enter saturation condition, now the increase of exciting current, must cause contravarianter voltage to enter in advance saturation stage, need to reduce contravarianter voltage by advance weak magnetic, so must limit exciting current, adopt the currents match relation of accompanying drawing 1, I
mrepresent optimum exciting current.
As shown in Figure 2, expression is the method for determining optimal exciting electric current.Traditional choosing method generally the 0.2-0.5 of rated exciting current doubly between, but the scope of such selection is very large, cannot know optimum result, contains very large uncertain property.In order to find a kind of simple effective method, adopt the mode of accompanying drawing 2, under rated speed, given rated secondary current is, change exciting current id, calculate thus corresponding moment of torsion current i q, by corresponding electric current to (id, iq) apply to motor vector control, with peak torque, export and determine optimal exciting electric current.
Concrete, as shown in Figure 2, optimal exciting electric current I
mdefinite method comprise the steps:
Step s31: under rated speed, given rated secondary current is and exciting current reference value id_ref;
Step s32: calculate corresponding moment of torsion current i q=sqrt (is^2-id_ref^2);
Step s33: carry out vector control;
Step s34: judge whether moment of torsion increases progressively;
Step s35: if moment of torsion increases progressively, make id_ref=id_ref+ Δ id, wherein, Δ id is recruitment; Perform step again s32;
Step s36: if moment of torsion does not increase progressively, determine optimal exciting electric current I
m=id_ref.
As shown in Figure 3, represent before the unsaturation of magnetic field to be definite method of the exciting current rotor time constant that constantly increases the stage.Because exciting current is equal with moment of torsion electric current, given (id
1, iq
1), (id
2, iq
2) ... (id
k, iq
k), id wherein
j=iq
j, j=1,2 ..., k.Each exciting current only need change rotor time constant reference value τ
r_ ref, just can change revolutional slip Ws, according to actual maximum output torque, is criterion, can determine thus the optimum rotor time constant under each exciting current specified criteria.
Concrete, as shown in Figure 3, when magnetic field reaches capacity before state, optimal time determination of the constants method comprises the steps:
Step s11: a given rotor time constant reference value τ
r_ ref(can estimate a rotor time constant according to inductance value, rotor resistance etc., as reference value);
Step s12: selected exciting current value id and corresponding moment of torsion current value iq, now iq=id;
Step s13: calculate revolutional slip Ws=iq/ (τ now
r_ ref*id);
Step s14: carry out vector control;
Step s15: judge whether moment of torsion increases progressively;
Step s16: if moment of torsion increases progressively, make τ
r_ ref=τ
r_ ref+ Δ τ
r, wherein, Δ τ
rfor recruitment (or claim " step value ", can need to determine its value according to precision); Perform step again s13;
Step s17: if moment of torsion does not increase progressively, determine optimal time constant τ
r=τ
r_ ref.
As shown in Figure 4, represent that it is remain unchanged definite method of rotor time constant in stage of exciting current that magnetic field enters saturation condition.The current relationship providing with reference to accompanying drawing 3, given different stator current is_ref=is
k, is
k+ Δ is, is
k+ 2 Δ is ..., is
max, wherein, is
k=sqrt (id
k^2+iq
k^2), Δ is is each stator current increment, is
maxfor the maximum stator current that motor allows, moment of torsion electric current and exciting current when the initial value of is_ref can be according to magnetic field saturation condition critical point are determined.Fixedly, after id, can obtain moment of torsion current i q corresponding under corresponding stator current is.Use this electric current to participating in vector control, adjust the set-point of rotor time constant, if moment of torsion constantly increases progressively, continue to increase rotor time constant, until reducing appears in moment of torsion, while finding moment of torsion maximum, corresponding rotor time constant is exactly optimum rotor time constant corresponding under this moment of torsion electric current.
Concrete, as shown in Figure 4, when magnetic field reaches capacity after state, optimal time determination of the constants method comprises the steps:
Step s21: reach capacity after state in magnetic field, limit exciting current id and remain unchanged, exciting current id is now optimal exciting electric current I
m;
Step s22: given stator current is_ref;
Step s23: calculate corresponding moment of torsion current i q=sqrt (is_ref^2-id^2);
Step s24: calculate revolutional slip Ws=iq/ (τ now
r_ ref*id);
Step s25: carry out vector control;
Step s26: judge whether moment of torsion increases progressively;
Step s27: if moment of torsion increases progressively, make τ
r_ ref=τ
r_ ref+ Δ τ
r, wherein, Δ τ
rfor recruitment; Perform step again s24;
Step s28: if moment of torsion does not increase progressively, determine optimal time constant τ
r=τ
r_ ref.
To sum up, the optimum rotor time constant of saturated front and back, magnetic field is coupled together, just can draw optimum rotor time constant corresponding under different stator currents, because the saturated front exciting current in magnetic field is equal with moment of torsion, saturated rear exciting current is constant, just moment of torsion curent change, for the convenience of controlling, the variation relation of optimal exciting electric current and moment of torsion electric current can be made to form and participate in actual motor vector control, draw thus the control of peak torque current ratio, guarantee the optimum of electric system efficiency.
Be in conjunction with concrete preferred implementation further description made for the present invention as said above, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, do not departing under the prerequisite of design of the present invention and intension, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (3)
1. a threephase asynchronous machine rotor optimal time determination of the constants method, is characterized in that:
When magnetic field reaches capacity before state, described optimal time determination of the constants method comprises the steps:
Step s11: a given rotor time constant reference value τ
r_ ref;
Step s12: selected exciting current value id and corresponding moment of torsion current value iq, now iq=id;
Step s13: calculate revolutional slip Ws=iq/ (τ now
r_ ref*id);
Step s14: carry out vector control;
Step s15: judge whether moment of torsion increases progressively;
Step s16: if moment of torsion increases progressively, make τ
r_ ref=τ
r_ ref+ Δ τ
r, wherein, Δ τ
rfor recruitment; Perform step again s13;
Step s17: if moment of torsion does not increase progressively, determine optimal time constant τ
r=τ
r_ ref.
2. optimal time determination of the constants method according to claim 1, also comprises the steps:
When magnetic field reaches capacity after state, described optimal time determination of the constants method comprises the steps:
Step s21: reach capacity after state in magnetic field, limit exciting current id and remain unchanged, exciting current id is now optimal exciting electric current I
m;
Step s22: given stator current is_ref;
Step s23: calculate corresponding moment of torsion current i q=sqrt (is_ref^2-id^2);
Step s24: calculate revolutional slip Ws=iq/ (τ now
r_ ref*id);
Step s25: carry out vector control;
Step s26: judge whether moment of torsion increases progressively;
Step s27: if moment of torsion increases progressively, make τ
r_ ref=τ
r_ ref+ Δ τ
r, wherein, Δ τ
rfor recruitment; Perform step again s24;
Step s28: if moment of torsion does not increase progressively, determine optimal time constant τ
r=τ
r_ ref.
3. optimal time determination of the constants method according to claim 2, is characterized in that:
Comprise optimal exciting electric current I
mdefinite method, comprise the steps:
Step s31: under rated speed, given rated secondary current is and exciting current reference value id_ref;
Step s32: calculate corresponding moment of torsion current i q=sqrt (is^2-id_ref^2);
Step s33: carry out vector control;
Step s34: judge whether moment of torsion increases progressively;
Step s35: if moment of torsion increases progressively, make id_ref=id_ref+ Δ id, wherein, Δ id is recruitment; Perform step again s32;
Step s36: if moment of torsion does not increase progressively, determine optimal exciting electric current I
m=id_ref.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310743256.7A CN103731081B (en) | 2013-12-30 | 2013-12-30 | A kind of threephase asynchronous machine rotor optimal time determination of the constants method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310743256.7A CN103731081B (en) | 2013-12-30 | 2013-12-30 | A kind of threephase asynchronous machine rotor optimal time determination of the constants method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103731081A true CN103731081A (en) | 2014-04-16 |
| CN103731081B CN103731081B (en) | 2016-05-25 |
Family
ID=50455043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310743256.7A Active CN103731081B (en) | 2013-12-30 | 2013-12-30 | A kind of threephase asynchronous machine rotor optimal time determination of the constants method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103731081B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779878A (en) * | 2015-04-06 | 2015-07-15 | 华中科技大学 | All-speed current distribution method capable of realizing torque and efficiency optimization and used for induction motor |
| CN105281633A (en) * | 2015-11-20 | 2016-01-27 | 上海新时达电气股份有限公司 | Method for automatically identifying asynchronous motor rotor time constant by frequency converter |
| CN105897104A (en) * | 2016-04-21 | 2016-08-24 | 中国船舶重工集团公司第七〇二研究所 | Asynchronous motor rotor time constant adjusting method |
| CN106100492A (en) * | 2016-05-26 | 2016-11-09 | 桥弘数控科技（上海）有限公司 | The rotor electrical time constant preparation method of a kind of asynchronous machine and system |
| CN106602953A (en) * | 2016-12-16 | 2017-04-26 | 浙江大学 | Method for verifying induction motor rotor time constant based on magnetic field orientation accuracy |
| CN107863914A (en) * | 2017-11-09 | 2018-03-30 | 天津英捷利汽车技术有限责任公司 | A kind of time constant of rotor of asynchronous machine self-adjusting system |
| CN109768749A (en) * | 2019-03-25 | 2019-05-17 | 中车青岛四方车辆研究所有限公司 | Threephase asynchronous machine rotor time constant real-time correction method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1229762A (en) * | 1997-12-22 | 1999-09-29 | 奥蒂斯电梯公司 | Automatic fine tuning of rotor time constant in field-oriented elevator motor drive |
| KR100732512B1 (en) * | 2006-02-17 | 2007-06-27 | 엘에스산전 주식회사 | Apparatus for measuring the parameter of induction motor and method thereof |
| CN102412778A (en) * | 2011-11-18 | 2012-04-11 | 华中科技大学 | Full speed domain torque maximizing vector control current distribution method for induction motor |
| CN102843093A (en) * | 2011-06-20 | 2012-12-26 | 永济新时速电机电器有限责任公司 | Online calibrating method and device for rotor time constant of asynchronous motor and control system |
| CN102916647A (en) * | 2012-10-22 | 2013-02-06 | 深圳市航盛电子股份有限公司 | Method and device for measuring time constant of asynchronous motor rotor on line |
| CN102914741A (en) * | 2012-10-17 | 2013-02-06 | 深圳市航盛电子股份有限公司 | Method and device for measuring parameter of asynchronous motor |
| CN103095205A (en) * | 2011-10-27 | 2013-05-08 | Ls产电株式会社 | Apparatus For Estimating Rotor Time Constant Of Induction Motor |
-
2013
- 2013-12-30 CN CN201310743256.7A patent/CN103731081B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1229762A (en) * | 1997-12-22 | 1999-09-29 | 奥蒂斯电梯公司 | Automatic fine tuning of rotor time constant in field-oriented elevator motor drive |
| KR100732512B1 (en) * | 2006-02-17 | 2007-06-27 | 엘에스산전 주식회사 | Apparatus for measuring the parameter of induction motor and method thereof |
| CN102843093A (en) * | 2011-06-20 | 2012-12-26 | 永济新时速电机电器有限责任公司 | Online calibrating method and device for rotor time constant of asynchronous motor and control system |
| CN103095205A (en) * | 2011-10-27 | 2013-05-08 | Ls产电株式会社 | Apparatus For Estimating Rotor Time Constant Of Induction Motor |
| CN102412778A (en) * | 2011-11-18 | 2012-04-11 | 华中科技大学 | Full speed domain torque maximizing vector control current distribution method for induction motor |
| CN102914741A (en) * | 2012-10-17 | 2013-02-06 | 深圳市航盛电子股份有限公司 | Method and device for measuring parameter of asynchronous motor |
| CN102916647A (en) * | 2012-10-22 | 2013-02-06 | 深圳市航盛电子股份有限公司 | Method and device for measuring time constant of asynchronous motor rotor on line |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779878A (en) * | 2015-04-06 | 2015-07-15 | 华中科技大学 | All-speed current distribution method capable of realizing torque and efficiency optimization and used for induction motor |
| CN105281633A (en) * | 2015-11-20 | 2016-01-27 | 上海新时达电气股份有限公司 | Method for automatically identifying asynchronous motor rotor time constant by frequency converter |
| CN105281633B (en) * | 2015-11-20 | 2018-02-27 | 上海新时达电气股份有限公司 | The method that frequency converter recognizes time constant of rotor of asynchronous machine automatically |
| CN105897104A (en) * | 2016-04-21 | 2016-08-24 | 中国船舶重工集团公司第七〇二研究所 | Asynchronous motor rotor time constant adjusting method |
| CN105897104B (en) * | 2016-04-21 | 2018-06-29 | 中国船舶重工集团公司第七一二研究所 | A kind of time constant of rotor of asynchronous machine adjusting method |
| CN106100492A (en) * | 2016-05-26 | 2016-11-09 | 桥弘数控科技（上海）有限公司 | The rotor electrical time constant preparation method of a kind of asynchronous machine and system |
| CN106100492B (en) * | 2016-05-26 | 2018-09-28 | 桥弘数控科技（上海）有限公司 | A kind of the rotor electrical time constant preparation method and system of asynchronous machine |
| CN106602953A (en) * | 2016-12-16 | 2017-04-26 | 浙江大学 | Method for verifying induction motor rotor time constant based on magnetic field orientation accuracy |
| CN106602953B (en) * | 2016-12-16 | 2018-11-09 | 浙江大学 | The verification method of induction electromotor rotor time constant based on field orientation accuracy |
| CN107863914A (en) * | 2017-11-09 | 2018-03-30 | 天津英捷利汽车技术有限责任公司 | A kind of time constant of rotor of asynchronous machine self-adjusting system |
| CN107863914B (en) * | 2017-11-09 | 2024-05-07 | 天津英捷利汽车技术有限责任公司 | Asynchronous motor rotor time constant self-adjusting system |
| CN109768749A (en) * | 2019-03-25 | 2019-05-17 | 中车青岛四方车辆研究所有限公司 | Threephase asynchronous machine rotor time constant real-time correction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103731081B (en) | 2016-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103731081B (en) | A kind of threephase asynchronous machine rotor optimal time determination of the constants method | |
| US9188648B2 (en) | Method and arrangement for determining inductances of synchronous reluctance machine | |
| US9525377B2 (en) | System and method of rotor time constant online identification in an AC induction machine | |
| CN106549620B (en) | A kind of Speed Sensorless Induction Motor vector control system low frequency processing method | |
| US9291686B2 (en) | Method of estimating the residual magnetic flux of transformer and residual magnetic flux estimation device | |
| KR101535036B1 (en) | Apparatus and Method for compensating torque about current order of driving motor | |
| CN112740537B (en) | MTPA control method, device, system and equipment of permanent magnet synchronous motor | |
| CN102882457B (en) | Traction motor control device and method | |
| CN109617486B (en) | Automatic calibration method for permanent magnet synchronous motor | |
| CN110098773B (en) | Permanent magnet synchronous motor parameter identification method using least square method | |
| CN109495052A (en) | A kind of permanent magnet synchronous motor MTPA control and single electric current field weakening control method | |
| Feng et al. | Maximum-torque-per-square-ampere control for interior PMSMs considering cross-saturation inductances | |
| CN105897104B (en) | A kind of time constant of rotor of asynchronous machine adjusting method | |
| WO2016029840A1 (en) | Method for accelerating v/f controlled induction motor in weak magnetic region | |
| Yamamoto et al. | Stator-flux-linkage-calculation-based torque estimation of induction motors considering iron, mechanical, and stray load losses | |
| CN108736782A (en) | Motor vector controlled reference current is allocated and the method for efficiency-optimization control | |
| EP0980135A1 (en) | Method and apparatus for controlling an induction motor | |
| EP0980135A2 (en) | Method and apparatus for controlling an induction motor | |
| CN108258962B (en) | Permanent magnet motor inductance parameter identification method and system | |
| CN105703688A (en) | Control method for preventing inverter from being in saturation state | |
| CN113659900B (en) | Mixed excitation motor flux weakening area steady-state efficiency optimizing control method | |
| CN111224598B (en) | Method for simultaneously identifying parameter saturation values of permanent magnet motor | |
| CN110112976B (en) | Permanent magnet synchronous motor parameter identification method using Newton-Raphson method | |
| CN103475295A (en) | Online correction method of induction motor rotor field phase based on reactive power | |
| CN103414429B (en) | Identification system and identification method of excitation parameter of single-phase induction motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |