CN105391365B - Static discrimination method that is a kind of while detecting rotor resistance and magnetizing inductance - Google Patents
Static discrimination method that is a kind of while detecting rotor resistance and magnetizing inductance Download PDFInfo
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- CN105391365B CN105391365B CN201510829779.2A CN201510829779A CN105391365B CN 105391365 B CN105391365 B CN 105391365B CN 201510829779 A CN201510829779 A CN 201510829779A CN 105391365 B CN105391365 B CN 105391365B
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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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The present invention relates to a kind of while detect the static discrimination method of rotor resistance and magnetizing inductance, this method is by stator resistance Rs, stator leakage inductance Lso, excitation mutual inductance LmConnect and load input voltage us, in excitation mutual inductance LmBoth ends are parallel with a rotor leakage inductance LroWith rotor resistance RrSeries circuit, stator resistance RsThere is stator current i sides, rotor resistance RrThere is rotor current i sider, while measured by stator side inductance, rotor resistance and magnetizing inductance, then by the way that the equivalent full leakage inductance of stator side is calculated.Static discrimination method that is provided by the invention while detecting rotor resistance and magnetizing inductance overcomes dead time effect, and rotor resistance and excitation mutual inductance are recognized using current closed-loop, reduces stator and surveys the influence that curent change is brought, makes measurement result more accurate.
Description
Technical field
The invention belongs to electric-power metering detection field, static state that is particularly a kind of while detecting rotor resistance and magnetizing inductance
Discrimination method.
Background technology
At present, in the technical field of detection rotor resistance, many scholar engineers propose different measurement sides
Formula.Such as：In model reference adaptive system, structure adaptive rate identification stator resistance, according to stator under off-line state, turn
Ratio between sub- resistance, on-line identification go out rotor resistance, are to rely on the precision of Stator resistance identification the shortcomings that this method simultaneously
And stator and rotor resistance parameters, when there is identical temperature rise change, both variation tendencies are unknown；Divide also by stator current excitation
The method of the harmonic wave of amount two kinds of different frequencies of injection, so brings extra noise to system, and to output voltage and defeated
Going out electric current has harmonic wave interference.
Through retrieval, a patent document related to this patent content, Publication No. CN102611382B China are found
Patent provides a kind of on-line identification method of parameter of electric machine, the more particularly to rotor in speed-less sensor vector control system
The on-line identification method of resistance.Independently of the integration modified voltage model flux observer of adaptive full-order state observer,
The process of magnetic linkage transient changing is utilized in system dynamic adjusts, is combined using adaptive forgetting factor RLS
Modified voltage model flux observer is integrated to rotor resistance on-line identification；Used when systematic steady state is run at interval of certain
Time to the certain harmonic wave of the of short duration injection of given rotor flux, magnetic linkage dynamic change is formed, using adaptive forgetting factor recursion
Least-squares algorithm combines integration improved electric pressing mold type flux observer to rotor resistance identification, the adaptive full rank of on line refreshable
Rotor resistance value in state observer.Rotor resistance on-line identification method of the present invention can calculate motor ginseng
Several changes, and electric machine controller is adjusted, improve the performance of electric machine controller.
But this ONLINE RECOGNITION method is in operation, need to when systematic steady state is run at interval of the regular hour to
The of short duration certain harmonic wave of injection of rotor flux, forms magnetic linkage dynamic change, so as to add the workload of control system, and can not
Detect rotor resistance and magnetizing inductance simultaneously.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, to propose that a kind of inverter motor that is used for drives, more accurately
While detect the static discrimination method of rotor resistance and magnetizing inductance.
The present invention solves its technical problem and takes following technical scheme to realize：
Static discrimination method that is a kind of while detecting rotor resistance and magnetizing inductance, this method are by stator resistance Rs, it is fixed
Sub- leakage inductance Lso, excitation mutual inductance LmConnect and load input voltage us, in excitation mutual inductance LmBoth ends are parallel with a rotor leakage inductance LroWith
Rotor resistance RrSeries circuit, stator resistance RsThere is stator current i sides, rotor resistance RrThere is rotor current i sider, pass through simultaneously
Stator side inductance, rotor resistance and magnetizing inductance measure, then by the way that the equivalent full leakage inductance of stator side is calculated.
Moreover, the step of calculating, is：
(1) input voltage makes stator current give to 30% rated current, in t after stablizing0Moment output voltage u0For：
u0=I30%×Rs+udead
(2) after input voltage makes given value of current 0% wait magnetic flux fully to decay, electric current gives 30% again, when waiting △ t
Between, the back-emf induced by motor leakage inductance is escaped, output voltage u is recorded at the t1 moment1, therefore ir=is, then following equation into
It is vertical：
(3) calculate
Deng voltage attenuation to u2=Δ u*e-1+u0Shi Jilu times t2, then understand
Wherein udeadFor the error voltage caused by the nonlinear elements such as dead time effect, Δ t be set to leakage inductance time constant (for
Known quantity), Tr is rotor time constant, and Lr is inductor rotor, Lσ' it is the equivalent full leakage inductance of stator side.
The advantages and positive effects of the present invention are：
Static discrimination method that is provided by the invention while detecting rotor resistance and magnetizing inductance overcomes dead time effect, adopts
Rotor resistance and excitation mutual inductance are recognized with current closed-loop, stator is reduced and surveys the influence that curent change is brought, make measurement
As a result it is more accurate.
Brief description of the drawings
Fig. 1 is the equivalent T-shaped figure of testing of electric motors；
Fig. 2 is the schematic diagram of rotor resistance and magnetizing inductance measurement time to time change in embodiment.
Embodiment
Present invention implementation is further described below in conjunction with accompanying drawing, following examples are descriptive, are not to limit
Property, it is impossible to protection scope of the present invention is limited with this.
Static discrimination method that is a kind of while detecting rotor resistance and magnetizing inductance, this method are by stator resistance Rs, it is fixed
Sub- leakage inductance Lso, excitation mutual inductance LmConnect and load input voltage us, in excitation mutual inductance LmBoth ends are parallel with a rotor leakage inductance LroWith
Rotor resistance RrSeries circuit, stator resistance RsThere is stator current i sides, rotor resistance RrThere is rotor current i sider, it measures step
Suddenly it is：
(1) input voltage makes stator current give to 30% rated current, in t after stablizing0Moment output voltage u0For：
u0=I30%×Rs+udead
(2) after input voltage makes given value of current 0% wait magnetic flux fully to decay, electric current gives 30% again, when waiting △ t
Between, the back-emf induced by motor leakage inductance is escaped, in t1Moment record output voltage u1, as shown in figure 1, impact given value of current
When, because motor magnetic linkage can not be mutated, therefore ir=is, then following equation establishment：
CalculateDeng voltage attenuation to u2=Δ u*e-1+u0Shi Ji
Record time t2, then understand
Wherein udeadFor the error voltage caused by the nonlinear elements such as dead time effect, Δ t be set to leakage inductance time constant (for
Known quantity), Tr is rotor time constant, and Lr is inductor rotor, Lσ' it is the equivalent full leakage inductance of stator side.
At the same time, see Fig. 2, for the data of rotor resistance and magnetizing inductance by measurement, can carry out effective quiet
State identifies.
Although disclosing embodiments of the invention and accompanying drawing for the purpose of illustration, those skilled in the art can manage
Solution：Do not departing from the present invention and spirit and scope of the appended claims in, it is various replace, change and modifications all be it is possible,
Therefore, the scope of the present invention is not limited to embodiment and accompanying drawing disclosure of that.
Claims (1)
1. static discrimination method that is a kind of while recognizing rotor resistance and magnetizing inductance, this method are by stator resistance Rs, stator leakage
Feel Lso, excitation mutual inductance LmConnect and load input voltage us, in excitation mutual inductance LmBoth ends are parallel with a rotor leakage inductance LroAnd rotor
Resistance RrSeries circuit, stator resistance RsProduce stator current is, rotor resistance RrProduce rotor current ir, while pass through stator
Side inductance, rotor resistance and magnetizing inductance measure, then by the way that the equivalent full leakage inductance of stator side is calculated；According to above-mentioned
Rotor resistance and the static discrimination method of excitation mutual inductance, it is characterised in that：The step of calculating is：
(1) input voltage makes stator current give to 30% rated current, in t after stablizing0Moment output voltage u0For：
u0=I30%×Rs+udead
In formula：“udead" represent error voltage, " I caused by the nonlinear elements such as dead time effect30%" represent rated current
30%, " Lm" represent excitation mutual inductance；
(2) after input voltage makes given value of current 0% wait magnetic flux fully to decay, electric current gives 30% again, waits the △ t times, hides
The back-emf induced by motor leakage inductance is crossed, in t1Moment record output voltage u1, therefore ir=is, then following equation establishment：
(3) calculate
Deng voltage attenuation to u2=Δ u*e-1+u0Shi Jilu times t2, then understand
Wherein udeadFor the error voltage caused by the nonlinear elements such as dead time effect, Δ t is set to leakage inductance time constant, and Tr is to turn
Sub- time constant, Lr are inductor rotor, Lσ' it is the equivalent full leakage inductance of stator side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510829779.2A CN105391365B (en) | 2015-11-25 | 2015-11-25 | Static discrimination method that is a kind of while detecting rotor resistance and magnetizing inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510829779.2A CN105391365B (en) | 2015-11-25 | 2015-11-25 | Static discrimination method that is a kind of while detecting rotor resistance and magnetizing inductance |
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| Publication Number | Publication Date |
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| CN105391365A CN105391365A (en) | 2016-03-09 |
| CN105391365B true CN105391365B (en) | 2018-02-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108231123B (en) * | 2018-02-07 | 2019-03-08 | 长鑫存储技术有限公司 | A kind of calibration method of semiconductor storage unit |
| CN111800048B (en) * | 2019-04-03 | 2022-02-15 | 深圳市正弦电气股份有限公司 | Static parameter identification method for induction motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5689169A (en) * | 1995-03-10 | 1997-11-18 | Allen-Bradley Company, Inc. | Transient inductance identifier for motor control |
| CN1354557A (en) * | 2001-11-28 | 2002-06-19 | 深圳安圣电气有限公司 | Non-synchronous motor parameter identification method |
| CN105075104A (en) * | 2012-12-19 | 2015-11-18 | 伊顿公司 | System for determining a magnetizing curve and rotor resistance of an induction machine and method of making same |
-
2015
- 2015-11-25 CN CN201510829779.2A patent/CN105391365B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5689169A (en) * | 1995-03-10 | 1997-11-18 | Allen-Bradley Company, Inc. | Transient inductance identifier for motor control |
| CN1354557A (en) * | 2001-11-28 | 2002-06-19 | 深圳安圣电气有限公司 | Non-synchronous motor parameter identification method |
| CN105075104A (en) * | 2012-12-19 | 2015-11-18 | 伊顿公司 | System for determining a magnetizing curve and rotor resistance of an induction machine and method of making same |
Non-Patent Citations (1)
| Title |
|---|
| 《基于电流闭环和死区补偿的变频驱动调速***低频振荡抑制》;乔鸣忠;《电工技术学报》;20141231;126-133 * |
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