CN101533071A - Global nonlinear inductance test method of switched reluctance motor - Google Patents
Global nonlinear inductance test method of switched reluctance motor Download PDFInfo
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- CN101533071A CN101533071A CN200910071825A CN200910071825A CN101533071A CN 101533071 A CN101533071 A CN 101533071A CN 200910071825 A CN200910071825 A CN 200910071825A CN 200910071825 A CN200910071825 A CN 200910071825A CN 101533071 A CN101533071 A CN 101533071A
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Abstract
A global nonlinear inductance test method of a switched reluctance motor belongs to the motor test field, aiming at solving the problem of big error of the inductance of the switched reluctance motors measured by traditional LCR meters. In the method, the position of a rotor of the switched reluctance motor is changed and fixed by a stepping motor; step voltage is loaded on a phase winding of the switched reluctance motor; a computer collects the current value of the phase winding via a current sensor; the collecting cycle is controlled by the computer programs; instantaneous inductance corresponding to the current values of different phase windings is computed when the position of the rotor is a certain fixed angle; the stepping motor is controlled to rotate according to the stepping angle; the relation between the current of the inductance is measured by above method under the condition of different positions of the rotor and finally the global nonlinear inductance information is obtained. The method is used for measuring the global nonlinear inductance of the switched reluctance motors.
Description
Technical field
The present invention relates to a kind of global nonlinear inductance test method of switched reluctance motor, belongs to the electromechanical testing field.
Background technology
Switched reluctance machines is simple in structure owing to having, control is convenient, high, the low cost and other advantages of unfailing performance, has now obtained the attention and the approval of all trades and professions.And switched reluctance machines is a kind of motor of high magnetic saturation work, and its parameter is non-linear.The inductance parameters of motor particularly, the inductance of motor is not only relevant with motor rotor position, and is simultaneously current related with motor windings.The LCR table that tradition adopts is measured the motor inductance, has ignored the non-linear of motor saturation characteristic and inductance, and evaluation has caused significant errors to motor performance.The measurement of saturated inductance of switched reluctance motor for this reason, to the motor body design and optimization, the overall performance of motor speed regulation system seems most important.
Summary of the invention
The objective of the invention is to solve and adopt the big problem of traditional LC R table measuring switch reluctance motor inductance error, a kind of global nonlinear inductance test method of switched reluctance motor is provided.
The device that the inventive method is used comprises switched reluctance machines, direct supply, switch, current sensor, computing machine, stepper motor and controllor for step-by-step motor, the positive source input end of the phase winding of switched reluctance machines links to each other with the positive pole of direct supply, the negative pole of direct supply links to each other with an end of switch, the other end of switch links to each other with the power cathode input end of phase winding
Current sensor is gathered the electric current of phase winding and is exported to computing machine,
The output terminal of controllor for step-by-step motor links to each other with the Stepping Motor Control end, and the output shaft of stepper motor is fixedlyed connected with the armature spindle of switched reluctance machines,
A kind of global nonlinear inductance test method of switched reluctance motor may further comprise the steps:
Step 2, stepping angle θ of controllor for step-by-step motor control step motor rotation
b, the armature spindle of fixedlying connected with stepper motor makes the rotor of switched reluctance machines be fixed on measuring position θ
n, 0≤θ
n≤ 360 °;
Step 3, Closing Switch, direct supply load step voltage U for the phase winding of switched reluctance machines;
Step 4, computing machine are gathered the current value of phase winding by current sensor, and the sampling period is Δ T;
Step 5, computing machine obtain the instantaneous inductor L (θ of phase winding in each sampling period Δ T by following formula
n, i), and then obtain at rotor measurement position θ
nThe time, the instantaneous inductor L (θ of the corresponding phase winding of the current value of different phase windings
n, i):
Wherein, i
0Electric current initial value when certain sampling period, Δ T began,
Electric current end value when i is certain sampling period Δ T end,
R is the equivalent resistance of phase winding,
Step 6, after the current value of phase winding is saturated, cut-off switch;
Step 7, judge whether to satisfy n * θ
b≤ 360 °,
Judged result is for being, n=n+1, and execution in step two, judged result is finished and is obtained the switched reluctance machines global nonlinear inductance for not.
Advantage of the present invention: the inductance during the switched reluctance machines diverse location is accurately measured, the measuring accuracy height, and measuring method is simple, obtains the data of the nonlinear inductance of universe scope.
Description of drawings
Fig. 1 is the inventive method process flow diagram, Fig. 2 is a measurement mechanism structural representation of the present invention, Fig. 3 is the step voltage synoptic diagram that the phase winding two ends load, Fig. 4 is that rotor-position changes along with the sampling time fixedly the time and the phase winding current curve synoptic diagram that changes, and Fig. 5 is a global nonlinear inductance curve family synoptic diagram.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 to Fig. 5, the device that the present embodiment method is used comprises switched reluctance machines, direct supply 3, switch 4, current sensor 5, computing machine 6, stepper motor 7 and controllor for step-by-step motor 8, the positive source input end of the phase winding 1 of switched reluctance machines links to each other with the positive pole of direct supply 3, the negative pole of direct supply 3 links to each other with an end of switch 4, the other end of switch 4 links to each other with the power cathode input end of phase winding 1
Current sensor 5 is gathered the electric current of phase winding 1 and is exported to computing machine 6,
The output terminal of controllor for step-by-step motor 8 links to each other with the control end of stepper motor 7, and the output shaft of stepper motor 7 is fixedlyed connected with the armature spindle of switched reluctance machines 2,
A kind of global nonlinear inductance test method of switched reluctance motor may further comprise the steps:
Step 2, stepping angle θ of controllor for step-by-step motor 8 control step motors, 7 rotations
b, the armature spindle 2 of fixedlying connected with stepper motor 7 makes the rotor of switched reluctance machines be fixed on measuring position θ
n, 0≤θ
n≤ 360 °;
Step 3, Closing Switch 4, direct supply 3 load step voltage U for the phase winding 1 of switched reluctance machines;
Step 4, computing machine 6 pass through the current value that current sensor 5 is gathered phase windings 1, and the sampling period is Δ T;
Step 5, computing machine 6 obtain the instantaneous inductor L (θ of phase winding 1 in each sampling period Δ T by following formula
n, i), and then obtain at rotor measurement position θ
nThe time, the instantaneous inductor L (θ of the corresponding phase winding 1 of the current value of different phase windings 1
n, i):
Wherein, i
0Electric current initial value when certain sampling period, Δ T began,
Electric current end value when i is certain sampling period Δ T end,
R is the equivalent resistance of phase winding 1,
Step 6, after the current value of phase winding 1 is saturated, cut-off switch 4;
Step 7, judge whether to satisfy n * θ
b≤ 360 °,
Judged result is for being, n=n+1, and execution in step two, judged result is finished and is obtained the switched reluctance machines global nonlinear inductance for not.
The inductance of switched reluctance machines is non-linear, rotor-position not simultaneously, the inductance difference; In the phase winding 1 current value not simultaneously, inductance is also different.Accurately the nonlinear inductance difficulty of measuring switch reluctance motor is very big.
Whether the A phase winding two ends with switched reluctance machines in the present embodiment connect direct supply 3, and load with switch 4 control direct supplys 3, and the voltage that direct supply 3 loads is U.Current sensor 5 is measured is current value in the A phase winding.
At first set n=1, this moment, the rotor-position of switched reluctance machines was θ
1, the determining of rotor-position is easy to, and zero-bit is changed to predefined, the angle information that the position that can obtain to arrive after the rotor rotation is determined.The rotor that this method relates to can begin rotation from zero position, in order to obtain the inductance information of the motor of universe in the rotor 360 degree scopes, as long as allow the stepper motor 7 of control rotor rotation rotate 360 degree.
Controllor for step-by-step motor 8 control step motors 7 rotate, and the stepping angle of each rotation is θ
b, the output shaft of stepper motor 7 is fixedlyed connected with the armature spindle of switched reluctance machines 2, that is, and and a stepping angle of stepper motor 7 every rotations θ
b, switched reluctance machines is also followed anglec of rotation θ
b, promptly when n=2, the rotor-position of switched reluctance machines is θ
1+ θ
b, the rest may be inferred.
Work as n=1, the rotor-position of switched reluctance machines is θ
1The time, instantaneous inductor L (θ in the phase winding 1 of measuring switch reluctance motor
1, surveying work principle i) is as follows:
This moment, the voltage equation of phase winding 1 was:
The electric current that can solve phase winding 1 is:
Wherein, i
0Electric current initial value when certain sampling period, Δ T began,
Electric current end value when i is certain sampling period Δ T end,
R is the equivalent resistance of phase winding 1,
U is the magnitude of voltage that phase winding 1 two ends load, i.e. the magnitude of voltage of direct supply 3, as shown in Figure 3.
Computing machine 6 begins sampling and calculates, and sampling mainly refers to the current value gathered in the phase windings 1 by current sensor 5, and the sampling period is Δ T, at the instantaneous inductor L (θ of the phase winding 1 in a sampling period of correspondence
1, i) obtain the instantaneous inductor L (θ of the phase winding 1 that obtain this moment according to formula (2)
1, be that the current value of phase winding 1 is (i i)
0+ i)/2 inductance value of some correspondence because the sampling period Δ T of computing machine is very little, can reach 1ns, so we are similar to thinks the instantaneous inductor L (θ of this moment
1, the instantaneous inductor L (θ of the electric current end value i correspondence when i) being certain sampling period Δ T end for electric current
1, i), the rest may be inferred, calculates the instantaneous inductor L (θ of each sampling period electric current end value correspondence
1, I
1), L (θ
1, I
2) ... L (θ
1, I
n), L (θ
1, I
m), up to the current saturation of phase winding 1, no longer become big, finish sampling, as shown in Figure 4, the nonlinear inductance of phase winding 1 has also experienced one-period, has experienced this cycle, and having obtained rotor-position is θ
1The time, the one group of instantaneous inductor L (θ that changes along with the difference of the current value in the phase winding 1
1, i) value.
First sampling period, the electric current initial value I of phase winding 1
0, the electric current end value is I
1, substitution formula (2) obtains phase winding 1 current value I
1Corresponding instantaneous inductor L (θ
1, I
1);
Second sampling period, the electric current initial value I of phase winding 1
1, the electric current end value is I
2, substitution formula (2) obtains phase winding 1 current value I
2Corresponding instantaneous inductor L (θ
1, I
2);
The rest may be inferred, up to the saturation current value I that obtains phase winding 1
mCorresponding instantaneous inductor L (θ
1, I
m).
When obtaining other position of rotor according to as above method with the current value in the phase winding 1 different change respectively organize instantaneous inductor L (θ
n, i) value is promptly finished the test of global nonlinear inductance, the result of test is depicted as curve as shown in Figure 5, and what draw among the figure is the cluster curve, and horizontal ordinate is the rotor-position of switched reluctance machines, ordinate is an instantaneous inductor, and many curves represent that respectively the current value of phase winding is I
1, I
2, I
3I
n, I
mThe time the instantaneous inductor curve, comprehensively reflected instantaneous inductor L (θ
n, numerical value i).
Embodiment two: the difference of present embodiment and embodiment one is that it also comprises voltage sensor 9, and voltage sensor 9 is gathered the voltage of phase winding 1 and exported to computing machine 6, and other is identical with embodiment one.
Whether the magnitude of voltage that voltage sensor 9 monitorings are carried in phase winding 1 two ends is normal.
Embodiment three: the difference of present embodiment and embodiment one is, the described step voltage U=1.2I of step 3
eR, wherein, I
eBe the rated current of phase winding 1, R is the equivalent resistance of phase winding 1, and other is identical with embodiment one.
It is relatively good that the magnitude of voltage that is carried in phase winding 1 two ends is provided with fruit like this, motor can not burnt.
Claims (3)
1, a kind of global nonlinear inductance test method of switched reluctance motor, the device that this method is used comprises switched reluctance machines, direct supply (3), switch (4), current sensor (5), computing machine (6), stepper motor (7) and controllor for step-by-step motor (8), the positive source input end of the phase winding of switched reluctance machines (1) links to each other with the positive pole of direct supply (3), the negative pole of direct supply (3) links to each other with an end of switch (4), the other end of switch (4) links to each other with the power cathode input end of phase winding (1)
Current sensor (5) is gathered the electric current of phase winding (1) and is exported to computing machine (6),
The output terminal of controllor for step-by-step motor (8) links to each other with the control end of stepper motor (7), and the output shaft of stepper motor (7) is fixedlyed connected with the armature spindle (2) of switched reluctance machines,
It is characterized in that a kind of global nonlinear inductance test method of switched reluctance motor may further comprise the steps:
Step 1, setting n are the variable of the rotor measurement position of switched reluctance machines, and are initialized as n=1;
Step 2, stepping angle θ of controllor for step-by-step motor (8) control step motor (7) rotation
b, the armature spindle (2) of fixedlying connected with stepper motor (7) makes the rotor of switched reluctance machines be fixed on measuring position θ
n, 0≤θ
n≤ 360 °;
Step 3, Closing Switch (4), direct supply (3) load step voltage U for the phase winding (1) of switched reluctance machines;
Step 4, computing machine (6) pass through the current value that current sensor (5) is gathered phase winding (1), and the sampling period is Δ T;
Step 5, computing machine (6) obtain the instantaneous inductor L (θ of phase winding (1) in each sampling period Δ T by following formula
n, i), and then obtain at rotor measurement position θ
nThe time, the instantaneous inductor L (θ of the corresponding phase winding of the current value of different phase winding (1) (1)
n, i):
Wherein, i
0Electric current initial value when certain sampling period, Δ T began,
Electric current end value when i is certain sampling period Δ T end,
R is the equivalent resistance of phase winding (1),
Step 6, after the current value of phase winding (1) is saturated, cut-off switch (4);
Step 7, judge whether to satisfy n * θ
b≤ 360 °,
Judged result is for being, n=n+1, and execution in step two, judged result is finished and is obtained the switched reluctance machines global nonlinear inductance for not.
2, a kind of global nonlinear inductance test method of switched reluctance motor according to claim 1 is characterized in that: it also comprises voltage sensor (9), and voltage sensor (9) is gathered the voltage of phase winding (1) and exported to computing machine (6).
3, a kind of global nonlinear inductance test method of switched reluctance motor according to claim 1 is characterized in that: the described step voltage U=1.2I of step 3
eR, wherein, I
eBe the rated current of phase winding (1), R is the equivalent resistance of phase winding (1).
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871974A (en) * | 2010-06-18 | 2010-10-27 | 华南理工大学 | Impedance spectroscopy measurement method |
| CN101561468B (en) * | 2009-05-22 | 2010-12-08 | 哈尔滨工业大学 | Method for testing saturated inductance of switched reluctance motor |
| CN103743955A (en) * | 2013-12-27 | 2014-04-23 | 北京京诚瑞达电气工程技术有限公司 | Method for measuring inductance of motor |
| CN103954844A (en) * | 2014-04-11 | 2014-07-30 | 西南交通大学 | Online detection method of inductance parameters of suspension electromagnet of middle and low speed magnetic-levitation train |
| CN104062584A (en) * | 2013-03-21 | 2014-09-24 | 常州大学 | Work condition detection circuit of DC motor and corresponding method |
| CN104897971A (en) * | 2014-03-06 | 2015-09-09 | 北京精密机电控制设备研究所 | Switched reluctance motor global non-linear inductance test device and test method |
| CN106291364A (en) * | 2016-10-09 | 2017-01-04 | 成都智创利源科技有限公司 | A kind of switched reluctance machines universe magnetic linkage method of testing |
| CN106443448A (en) * | 2016-10-09 | 2017-02-22 | 成都智创利源科技有限公司 | Testing method of all region static flux linkage of switch reluctance motor |
| CN110199123A (en) * | 2017-01-18 | 2019-09-03 | Lg电子株式会社 | The control device and control method of Linearkompressor |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561468B (en) * | 2009-05-22 | 2010-12-08 | 哈尔滨工业大学 | Method for testing saturated inductance of switched reluctance motor |
| CN101871974A (en) * | 2010-06-18 | 2010-10-27 | 华南理工大学 | Impedance spectroscopy measurement method |
| CN101871974B (en) * | 2010-06-18 | 2013-01-09 | 华南理工大学 | Impedance spectroscopy measurement method |
| CN104062584A (en) * | 2013-03-21 | 2014-09-24 | 常州大学 | Work condition detection circuit of DC motor and corresponding method |
| CN103743955A (en) * | 2013-12-27 | 2014-04-23 | 北京京诚瑞达电气工程技术有限公司 | Method for measuring inductance of motor |
| CN103743955B (en) * | 2013-12-27 | 2016-05-25 | 北京京诚瑞达电气工程技术有限公司 | Method for measuring inductance of motor |
| CN104897971A (en) * | 2014-03-06 | 2015-09-09 | 北京精密机电控制设备研究所 | Switched reluctance motor global non-linear inductance test device and test method |
| CN103954844A (en) * | 2014-04-11 | 2014-07-30 | 西南交通大学 | Online detection method of inductance parameters of suspension electromagnet of middle and low speed magnetic-levitation train |
| CN103954844B (en) * | 2014-04-11 | 2017-02-15 | 西南交通大学 | Online detection method of inductance parameters of suspension electromagnet of middle and low speed magnetic-levitation train |
| CN106291364A (en) * | 2016-10-09 | 2017-01-04 | 成都智创利源科技有限公司 | A kind of switched reluctance machines universe magnetic linkage method of testing |
| CN106443448A (en) * | 2016-10-09 | 2017-02-22 | 成都智创利源科技有限公司 | Testing method of all region static flux linkage of switch reluctance motor |
| CN110199123A (en) * | 2017-01-18 | 2019-09-03 | Lg电子株式会社 | The control device and control method of Linearkompressor |
| US10935020B2 (en) | 2017-01-18 | 2021-03-02 | Lg Electronics Inc. | Apparatus for controlling linear compressor |
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Open date: 20090916 |