CN108039842A - A kind of three-level formula synchronous electric motor rotor initial position detection method - Google Patents
A kind of three-level formula synchronous electric motor rotor initial position detection method Download PDFInfo
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- CN108039842A CN108039842A CN201711426236.1A CN201711426236A CN108039842A CN 108039842 A CN108039842 A CN 108039842A CN 201711426236 A CN201711426236 A CN 201711426236A CN 108039842 A CN108039842 A CN 108039842A
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- initial position
- rotor
- level formula
- formula synchronous
- motor
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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
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
-
- 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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
- H02P21/32—Determining the initial rotor position
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention relates to a kind of three-level formula synchronous electric motor rotor initial position detection method, rotation high-frequency voltage signal is injected in main motor stator side, detect the high frequency electric response signal of main exciter stator side, by being filtered to current signal, Park conversion and the processing such as arc tangent, you can obtain initial position of rotor.Test result indicates that, this method can quickly and accurately detect initial position of rotor, rotor will not be made to rotate, it is not required that know the parameter of motor, hardware configuration is simple, and initial position of rotor accuracy of detection disclosure satisfy that the smooth start requirement of three-level formula synchronous motor.
Description
Technical field
The invention belongs to electric excitation synchronous motor control technology field, is related to a kind of three-level formula synchronous electric motor rotor initial bit
Put detection method.
Background technology
Start/it is generating integrated be following aviation power system an important development trend.Three-level formula synchronous motor has
There are many advantages such as power density is high, reliability is high, maintenance is simple, obtained at present in aviation high-power ac power system
Extensive use.If aero-engine can be started using the motoring condition of generator, dedicated starter can be saved, is subtracted
Light airborne weight, this development for more/electric aircraft are of great significance.The initial position of rotor can be accurately detected out
It is the premise for realizing three-level formula synchronous motor high-performance closed loop starting control, inaccurate initial position of rotor will influence motor
Start output torque so that starting performance declines and causes starting failure, or even occurs inverting and damage aero-engine.Cause
This, the starting control of three-level formula synchronous motor requires the accuracy of detection of initial position of rotor very high.
Due to three-level formula synchronous motor in starting process using aero-engine as load, load torque is very big and does not allow
Reversion, so the direct current localization method that initial position of rotor detection is carried out by rotating motor is no longer applicable in.It is convex based on motor
The method for detecting initial position of rotor of pole characteristic can accurately detect the initial position of rotor of permanent magnet synchronous motor.But as master
When exciter uses two-phase AC excitation, the fluctuation of main motor exciting current is larger, and the magnetic linkage of main motor rotor field coil does not have
The permanent magnet flux linkage of permanent-magnetic synchronous motor rotor is stablized.So when such method is applied to three-level formula synchronous motor, have larger
Detection error.Voltage vector impulses injection method method for detecting initial position of rotor based on inductor saturation effect is in practical application
In, initial position of rotor accuracy of detection depends primarily upon the acquisition precision of impulse response electric current, this proposes very hardware platform
High requirement, implements complex.
The content of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of three-level formula synchronous electric motor rotor initial position inspection
Survey method.
Technical solution
A kind of three-level formula synchronous electric motor rotor initial position detection method, it is characterised in that step is as follows：
Step 1：It is Ve to apply amplitude for three-level formula synchronous motor main exciter two-phase stator winding, frequency fe, phase
The two-phase AC excitation voltage of 90 ° of mutual deviation；Again high frequency voltage U is injected separately into main motor threephase stator windingah、Ubh、Uch；
Step 2：Main exciter stator winding biphase current is sampled, obtains iαAnd iβ, by iαWith iβPure prolong is carried out once respectively
When filter, the exciting current using rejection frequency as fe, obtains iα1With iβ1；
Step 3：To iα1With iβ1Carry out the Park that a secondary frequencies are (f-fe) to convert, obtain iα2With iβ2；
Step 4：Using low-pass filter to iα2With iβ2Low-pass filtering is carried out respectively, obtains iα3With iβ3；
Step 5：To iα3With iβ3Ask for arc tangentObtain correct initial position of rotor.
The high frequency voltage is f, the high frequency voltage U of 90 ° of phase mutual deviation by frequencyαh=VhCos (2 π ft), Uβh=Vhsin
(2 π ft) is obtained by Clarke inverse transformations.
Beneficial effect
A kind of three-level formula synchronous electric motor rotor initial position detection method proposed by the present invention, injects in main motor stator side
High-frequency voltage signal is rotated, detects the high frequency electric response signal of main exciter stator side, by being filtered to current signal,
The processing such as Park conversion and arc tangent, you can obtain initial position of rotor.Test result indicates that this method can be quickly and accurately
Detect initial position of rotor, rotor will not be made to rotate, it is not required that know the parameter of motor, hardware configuration is simple, turns
Sub- initial position detection precision disclosure satisfy that the smooth start requirement of three-level formula synchronous motor.
The method of the present invention has the advantages that：
(1) this method regards main motor and main exciter as rotary transformer, takes full advantage of the mutual inductance between rotor
Relation between rotor-position.Compared to conventional rotors initial position detection method, this method can be detected quickly and accurately
Go out initial position of rotor, rotor will not be made to rotate, it is not required that know the parameter of motor, hardware configuration is simple.
(2) the signal injection of this method and signal extraction mode are all fairly simple, workable, and detection time
Short, initial position of rotor accuracy of detection is high.
Brief description of the drawings
Fig. 1：Three-level formula synchronous motor structure figure
Fig. 2：Initial position of rotor test experience waveform
Fig. 3：Experiment porch
Embodiment
In conjunction with embodiment, attached drawing, the invention will be further described：
Step 1：It is as shown in Figure 1 using the three-level formula synchronous motor structure of two-phase AC excitation mode.First to three-level formula
The rotor of synchronous motor main motor carries out excitation.It is identical (210Vrms) that amplitude is passed to the two-phase stator winding of main exciter, frequency
Rate is identical (200Hz), the two-phase AC excitation voltage of 90 ° of phase mutual deviation.Due to the electric angle of two-phase stator winding spatially mutual deviation
Degree is also 90 °, a rotating excitation field can be then produced in main exciter, which can produce three in rotor three-phase winding
Phase induced voltage, the direct current of three-phase voltage output ripple after rotating rectifier rectification, realizes main motor rotor-exciting.
Step 2：To main motor threephase stator winding injection high frequency voltage Uah、Ubh、Uch, which passes through Clarke
It is 1V that can be equivalent to inject amplitude to main motor stator α phases and β phases after conversion, frequency 250Hz, the high frequency that 90 ° of phase mutual deviation
Voltage signal, Uαh=cos500 π t, Uβh=sin500 π t.
Step 3：Main exciter stator winding biphase current is sampled, obtains iαWith iβ。iαWith iβIt is middle to include frequency respectively
Two kinds of response currents of negative sequence component that the positive-sequence component and frequency that rate is 50Hz are 450Hz and the excitation that frequency is 200Hz electricity
Stream.By iαWith iβPure filtering wave by prolonging time is carried out once respectively, to filter out exciting current, obtains iα1With iβ1。
Step 4：After pure filtering wave by prolonging time, remaining positive-sequence component and negative sequence component in current signal.Then to iα1With
iβ1Carry out the Park that a secondary frequencies are 50Hz to convert, obtain iα2With iβ2.Converted by Park, the negative sequence component in current signal
It can become the negative sequence component that frequency is 500Hz, and positive-sequence component can then become DC quantity.
Step 5：Using low-pass filter to iα2With iβ2Low-pass filtering is carried out respectively, to filter out negative sequence component, obtains iα3With
iβ3, arc tangent is then asked for, i.e.,It can obtain correct initial position of rotor.In order to verify set forth herein
Method for detecting initial position of rotor correctness, built experiment porch with a three-level formula synchronous motor herein, and carry out
The experiment of initial position of rotor detection.In experimentation, main exciter is encouraged using 210Vrms/200Hz two-phase alternating currents
Magnetic, detects rotor-position, for verifying the accuracy of testing result using rotary transformer.It is to main motor stator injection amplitude
1V, frequency are the rotation high-frequency voltage signal of 250Hz, detect main exciter stator biphase current, and carry out at follow-up signal
Reason, the initial position of rotor that must can be estimated.The results are shown in Figure 2 for initial position of rotor test experience.Fig. 3 is experiment porch.From
In Fig. 2 as can be seen that after applying rotation high frequency voltage, the rotor-position detected is restrained rapidly to actual position.We
The estimated speed of method is fast, and initial position of rotor estimation error stabilization can meet three-level formula synchronous motor within 2 ° of electrical angles
To the required precision of rotor-position during starting.
Claims (2)
1. a kind of three-level formula synchronous electric motor rotor initial position detection method, it is characterised in that step is as follows：
Step 1：It is Ve to apply amplitude for three-level formula synchronous motor main exciter two-phase stator winding, frequency fe, phase mutual deviation
90 ° of two-phase AC excitation voltage；Again high frequency voltage U is injected separately into main motor threephase stator windingah、Ubh、Uch；
Step 2：Main exciter stator winding biphase current is sampled, obtains iαAnd iβ, by iαWith iβPure delay filter is carried out once respectively
Ripple, the exciting current using rejection frequency as fe, obtains iα1With iβ1；
Step 3：To iα1With iβ1Carry out the Park that a secondary frequencies are (f-fe) to convert, obtain iα2With iβ2；
Step 4：Using low-pass filter to iα2With iβ2Low-pass filtering is carried out respectively, obtains iα3With iβ3；
Step 5：To iα3With iβ3Ask for arc tangentObtain correct initial position of rotor.
2. three-level formula synchronous electric motor rotor initial position detection method according to claim 1, it is characterised in that：The high frequency
Voltage is f, the high frequency voltage U of 90 ° of phase mutual deviation by frequencyαh=VhCos (2 π ft), Uβh=VhSin (2 π ft) passes through Clarke
Inverse transformation obtains.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711426236.1A CN108039842A (en) | 2017-12-26 | 2017-12-26 | A kind of three-level formula synchronous electric motor rotor initial position detection method |
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| CN201711426236.1A CN108039842A (en) | 2017-12-26 | 2017-12-26 | A kind of three-level formula synchronous electric motor rotor initial position detection method |
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| CN108039842A true CN108039842A (en) | 2018-05-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188121A (en) * | 2018-08-14 | 2019-01-11 | 西北工业大学 | Faults in rotating rectifiers detection method under three-level formula starting/generator stationary state |
| CN109539960A (en) * | 2018-11-13 | 2019-03-29 | 北京金自天正智能控制股份有限公司 | A kind of the rotor initial alignment control system and control method of vast capacity excitation magnetic synchronization motor |
| CN113676104A (en) * | 2021-07-27 | 2021-11-19 | 南京航空航天大学 | Three-level synchronous motor rotor position estimation method based on integrated filtering |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832865A (en) * | 2012-09-05 | 2012-12-19 | 南京航空航天大学 | Method for estimating initial position of rotor of three-stage brushless alternative-current synchronous motor |
| EP2816725A2 (en) * | 2013-06-20 | 2014-12-24 | Hamilton Sundstrand Corporation | Three phase flux switching generator in a three stage wound field synchronous machine |
| CN106059430A (en) * | 2016-06-03 | 2016-10-26 | 南京航空航天大学 | Method for estimating rotor position of three-stage brushless AC synchronous motor |
| CN107134962A (en) * | 2017-05-23 | 2017-09-05 | 西北工业大学 | A kind of three-level formula synchronous motor rotor position evaluation method |
-
2017
- 2017-12-26 CN CN201711426236.1A patent/CN108039842A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832865A (en) * | 2012-09-05 | 2012-12-19 | 南京航空航天大学 | Method for estimating initial position of rotor of three-stage brushless alternative-current synchronous motor |
| EP2816725A2 (en) * | 2013-06-20 | 2014-12-24 | Hamilton Sundstrand Corporation | Three phase flux switching generator in a three stage wound field synchronous machine |
| CN106059430A (en) * | 2016-06-03 | 2016-10-26 | 南京航空航天大学 | Method for estimating rotor position of three-stage brushless AC synchronous motor |
| CN107134962A (en) * | 2017-05-23 | 2017-09-05 | 西北工业大学 | A kind of three-level formula synchronous motor rotor position evaluation method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188121A (en) * | 2018-08-14 | 2019-01-11 | 西北工业大学 | Faults in rotating rectifiers detection method under three-level formula starting/generator stationary state |
| CN109188121B (en) * | 2018-08-14 | 2020-09-08 | 西北工业大学 | Fault detection method for rotating rectifier in static state of three-stage starting/generator |
| CN109539960A (en) * | 2018-11-13 | 2019-03-29 | 北京金自天正智能控制股份有限公司 | A kind of the rotor initial alignment control system and control method of vast capacity excitation magnetic synchronization motor |
| CN109539960B (en) * | 2018-11-13 | 2020-10-13 | 北京金自天正智能控制股份有限公司 | Rotor initial positioning control system and control method of ultra-large-capacity excitation synchronous motor |
| CN113676104A (en) * | 2021-07-27 | 2021-11-19 | 南京航空航天大学 | Three-level synchronous motor rotor position estimation method based on integrated filtering |
| CN113676104B (en) * | 2021-07-27 | 2023-06-23 | 南京航空航天大学 | Three-stage synchronous motor rotor position estimation method based on integrated filtering |
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Application publication date: 20180515 |