CN103149453A - Method for testing quadrature axis inductance and direct axis inductance of permanent magnet synchronous motors - Google Patents
Method for testing quadrature axis inductance and direct axis inductance of permanent magnet synchronous motors Download PDFInfo
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- CN103149453A CN103149453A CN2013100890494A CN201310089049A CN103149453A CN 103149453 A CN103149453 A CN 103149453A CN 2013100890494 A CN2013100890494 A CN 2013100890494A CN 201310089049 A CN201310089049 A CN 201310089049A CN 103149453 A CN103149453 A CN 103149453A
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Abstract
The invention provides a method for testing the quadrature axis inductance and direct axis inductance of permanent magnet synchronous motors. Constant direct current is added into the motor unit windings of a non-tested unit in order to generate electromagnetic torque which can fix a rotor at the quadrature axis or the direct axis; the A-phase outlet and B-phase outlet of a motor unit to be tested are connected with the single-phase output ends of an inverter, alternating current, the frequency of which is the rated frequency of the motor, is inputted into the phase A and phase B of the motor, a voltage regulator is utilized to regulate voltage into rated voltage, and the current terminal voltage, A-phase and B-phase current and A-phase and B-phase power of the A-phase winding and B-phase winding of the tested motor unit are recorded; and according to the data, the quadrature axis inductance and direct axis inductance of the multi-phase and multi-unit permanent magnet synchronous motor are calculated. When utilizing the characteristics of the winding structures of the multiple units of the multi-phase and multi-unit permanent magnet synchronous motor in combination with the alternating-current standstill method to test the quadrature axis inductance and direct axis inductance of the motor, the method inputs direct current into the other unit to fix the rotor at the position of the direct axis or the quadrature axis, meanwhile, the tested unit is not affected, and thereby an additional rotor locking device is dispensed with.
Description
Technical field
The present invention relates to a kind of method of testing of permagnetic synchronous motor ac-dc axis inductance, belong to motor inductance test method technical field.
Background technology
At present, have much for the method for testing of permagnetic synchronous motor inductance, such as Using Direct Current Bridge Method test, the test of magnetic linkage method, the test of static torque method, exchange in addition static method test etc.Wherein, exchange that the static method test can facilitate relatively and the inductance that accurately tests out the motor winding, and method of testing is easy to realization.But utilize interchange static method inductance measuring also to have some problems, such as generally, need to add locked-rotor device when utilizing the interchange static method to measure heterogeneous multiple-unit permagnetic synchronous motor winding fixes the rotor of motor, virtually increased and tested required appointed condition, also made testing procedure loaded down with trivial details.
Summary of the invention
The objective of the invention is when namely adopting at present the ac-dc axis inductance that exchanges the heterogeneous multiple-unit permagnetic synchronous motor of static method test, need to add stall equipment in order to solve the problem of prior art existence.And then provide a kind of method of testing of permagnetic synchronous motor ac-dc axis inductance.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method of testing of permagnetic synchronous motor ac-dc axis inductance, step is as follows:
Step 1 in the electric motor units A of non-test cell phase winding, adds current value to be
The Constant Direct Current electric current, in the electric motor units B of non-test cell phase winding, add current value to be
The Constant Direct Current electric current, in the electric motor units C of non-test cell phase winding, add current value to be
The Constant Direct Current electric current, make rotor be fixed on the electromagnetic torque of d-axis in order to generation;
Step 2, the AB phase extension line of the electric motor units that will test is received the single-phase output terminal of frequency converter, give the motor AB alternating current of frequency for its rated frequency that communicate, be rated voltage by the pressure regulator regulation voltage, terminal voltage, AB phase current and the AB phase power of the AB phase winding of the testing of electric motors unit of record this moment; Calculate the d-axis inductance of heterogeneous multiple-unit permagnetic synchronous motor according to these data;
Step 3 stops energising, changes the electric connecting mode of non-testing of electric motors unit; In the electric motor units B phase winding of non-test cell, adding current value is the Constant Direct Current electric current of I, in the electric motor units C of non-test cell phase winding, adds current value to be-the Constant Direct Current electric current of I, makes rotor be fixed on the electromagnetic torque of handing over axle in order to generation;
Step 4, the AB phase extension line of the electric motor units that will test is received the single-phase output terminal of frequency converter, give the motor AB alternating current of frequency for its rated frequency that communicate, be rated voltage by the pressure regulator regulation voltage, terminal voltage, AB phase current and the AB phase power of the AB phase winding of the testing of electric motors unit of record this moment; Calculate the friendship axle inductance of heterogeneous multiple-unit permagnetic synchronous motor according to these data.
The invention has the beneficial effects as follows, when utilizing the multiunit winding construction characteristics of heterogeneous multiple-unit permagnetic synchronous motor in conjunction with interchange static method testing of electric motors ac-dc axis inductance, adopt other unit to pass into DC current and fix the position that rotor is in d-axis or hands over axle, test cell is not impacted simultaneously, add the blocking rotor rotary device thereby saved.
Adopt method of the present invention to realize that in the test process of heterogeneous multiple-unit motor inductance, the casing of motor and shaft extension all need not specially be fixed, also do not need external unit.Have the advantages such as simple in structure, stable performance, data be reliable, can satisfy general permagnetic synchronous motor inductance measurement needs.
Description of drawings
The circuit connection diagram of non-testing of electric motors unit when Fig. 1 is the test d-axis inductance of the inventive method;
Fig. 2 is the circuit connection diagram of the electric motor units inductance measurement to be tested of the inventive method;
Fig. 3 is the circuit connection diagram of the test of the inventive method non-testing of electric motors unit when handing over the axle inductance;
Fig. 4 is the structural representation of heterogeneous multiple-unit permagnetic synchronous motor of the present invention.
1A in Fig. 4,1B, 1C represent that the three-phase symmetrical of first stand-alone unit exchanges winding; 2A, 2B, 2C represent that the three-phase symmetrical of second stand-alone unit exchanges winding; 3A, 3B, 3C represent that the three-phase symmetrical of the 3rd stand-alone unit exchanges winding; NA, NB, NC represent that the three-phase symmetrical of N stand-alone unit exchanges winding.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing: the present embodiment is implemented under take technical solution of the present invention as prerequisite, has provided detailed embodiment, but protection scope of the present invention is not limited to following embodiment.
As Fig. 1 ~ shown in Figure 4, the method for testing of a kind of permagnetic synchronous motor ac-dc axis inductance that the present embodiment is related, step is as follows:
Step 1 in the electric motor units A of non-test cell phase winding, adds current value to be
The Constant Direct Current electric current, in the electric motor units B of non-test cell phase winding, add current value to be
The Constant Direct Current electric current, in the electric motor units C of non-test cell phase winding, add current value to be
The Constant Direct Current electric current, make rotor be fixed on the electromagnetic torque of d-axis in order to generation.The electric motor units electrical connection diagram of its non-test cell as shown in Figure 1.
Step 2, the AB phase extension line of the electric motor units that will test is received the single-phase output terminal of frequency converter, and test circuit figure is as shown in Figure 2.The motor AB frequency that communicates is the alternating current of its rated frequency, is rated voltage by the pressure regulator regulation voltage, terminal voltage, AB phase current and the AB phase power of the AB phase winding of the testing of electric motors unit of record this moment; Calculate the d-axis inductance of heterogeneous multiple-unit permagnetic synchronous motor according to these data.
Step 3 stops energising, changes the electric connecting mode of non-testing of electric motors unit.In the electric motor units B phase winding of non-test cell, adding current value is the Constant Direct Current electric current of I, in the electric motor units C of non-test cell phase winding, adds current value to be-the Constant Direct Current electric current of I, makes rotor be fixed on the electromagnetic torque of handing over axle in order to generation.The electric motor units electrical connection diagram of its non-test cell as shown in Figure 3.
Step 4, the AB phase extension line of the electric motor units that will test is received the single-phase output terminal of frequency converter, and test circuit figure is as shown in Figure 2.The motor AB frequency that communicates is the alternating current of its rated frequency, is rated voltage by the pressure regulator regulation voltage, terminal voltage, AB phase current and the AB phase power of the AB phase winding of the testing of electric motors unit of record this moment; Calculate the friendship axle inductance of heterogeneous multiple-unit permagnetic synchronous motor according to these data.
Multiple-unit permagnetic synchronous motor electromagnetism fixation principle:
Pass into DC current at a unit, when a unit passes into alternating current, the equation of motion of system as shown in the formula
Be the moment of inertia of rotating part,
For being friction and windage moment of resistance coefficient.
Produce the principle of torque according to motor
Wherein,
Be moment coefficient,
Magnetic flux maximal value for the permanent magnet generation
Can with
Be expressed as position angle
Function,
Be expressed as position angle
With the function of time t, but the Equation of Motion abbreviation is
This equation is a Non-homogeneous Constant Coefficient Linear Ordinary Differential Equation, and by finding the solution, the stability condition of the Equation of Motion of this Representation Equation is
Wherein
Be the alternating current angular frequency.
As long as satisfy the stability condition of Equation of Motion, the rotor of motor just can be regarded as and to be fixed on a certain position.
The calculating of permagnetic synchronous motor inductance under method of testing of the present invention:
When only having a cell operation, the voltage equation of multiple-unit permagnetic synchronous motor winding can be write as following matrix form:
Wherein,
,
,
,
Wherein,
,
Be
The self-induction of individual winding,
The
Individual winding and
The mutual inductance of individual winding.
In fact, the self-induction of winding and mutual inductance are all rotor position angles
Function, so formula (2) can be write as following form again:
When utilizing quiet survey method to measure the winding inductance parameter, the fixed electrical machinery rotor is motionless, at this moment
, formula (3) can be reduced to
At this moment,
Pass into simple sinusoidal alternating current in individual winding
, and other windings are all opened a way.
Individual winding and voltage equation can be written as
Following formula is write pluralize
Wherein,
,
Be the effective value of relevant voltage and electric current,
Angular frequency for simple sinusoidal alternating current.
Be fixed on when handing over axle or d-axis when rotor, the
The self-induction of individual winding is
In actual measurement, by measuring the winding copper loss
And electric current
, the resistance that can try to achieve winding is as follows
Following formula can be expressed as
According to above-mentioned formula,
Pass into simple sinusoidal alternating current in individual winding
, and in the situation that other windings are all opened a way, measure
The electric current of individual winding, the
The voltage of individual winding, the
The power of individual winding can calculate
The self-induction of individual winding.
According to the concrete grammar of this test, when the multiple-unit permanent-magnetic synchronous motor rotor was in the d-axis position, by formula (6) calculated its d-axis inductance.When the multiple-unit permanent-magnetic synchronous motor rotor was in the friendship shaft position, by formula (7) calculated it and hand over the axle inductance.
(7)
The above; only be the better embodiment of the present invention; these embodiments all are based on the different implementations under general idea of the present invention; and protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.
Claims (1)
1. the method for testing of a permagnetic synchronous motor ac-dc axis inductance, is characterized in that,
Step 1 in the electric motor units A of non-test cell phase winding, adds current value to be
The Constant Direct Current electric current, in the electric motor units B of non-test cell phase winding, add current value to be
The Constant Direct Current electric current, in the electric motor units C of non-test cell phase winding, add current value to be
The Constant Direct Current electric current, make rotor be fixed on the electromagnetic torque of d-axis in order to generation;
Step 2, the AB phase extension line of the electric motor units that will test is received the single-phase output terminal of frequency converter, give the motor AB alternating current of frequency for its rated frequency that communicate, be rated voltage by the pressure regulator regulation voltage, terminal voltage, AB phase current and the AB phase power of the AB phase winding of the testing of electric motors unit of record this moment; Calculate the d-axis inductance of heterogeneous multiple-unit permagnetic synchronous motor according to these data;
Step 3 stops energising, changes the electric connecting mode of non-testing of electric motors unit; In the electric motor units B phase winding of non-test cell, adding current value is the Constant Direct Current electric current of I, in the electric motor units C of non-test cell phase winding, adds current value to be-the Constant Direct Current electric current of I, makes rotor be fixed on the electromagnetic torque of handing over axle in order to generation;
Step 4, the AB phase extension line of the electric motor units that will test is received the single-phase output terminal of frequency converter, give the motor AB alternating current of frequency for its rated frequency that communicate, be rated voltage by the pressure regulator regulation voltage, terminal voltage, AB phase current and the AB phase power of the AB phase winding of the testing of electric motors unit of record this moment; Calculate the friendship axle inductance of heterogeneous multiple-unit permagnetic synchronous motor according to these data.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472313A (en) * | 2013-09-29 | 2013-12-25 | 哈尔滨工业大学 | Permanent magnet synchronous motor alternating current and direct current shaft inductance testing method giving consideration to saturation situation |
| CN103472312A (en) * | 2013-09-29 | 2013-12-25 | 哈尔滨工业大学 | Testing method for iron core loss of alternating-current permanent magnet motors |
| CN104034464A (en) * | 2014-06-28 | 2014-09-10 | 哈尔滨工业大学 | Even unit alternating-current permanent magnet motor torque ripple testing method |
| CN104360171A (en) * | 2014-11-17 | 2015-02-18 | 长春工程学院 | Method for measuring inductance parameter of permanent magnet synchronous motor |
| CN104634485A (en) * | 2015-03-07 | 2015-05-20 | 哈尔滨工业大学 | Simple testing method for moment coefficient of alternating current permanent magnetic motor |
| CN113311248A (en) * | 2021-06-25 | 2021-08-27 | 安徽大学 | Stator coil inductance measuring method for reluctance type spherical motor |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472313A (en) * | 2013-09-29 | 2013-12-25 | 哈尔滨工业大学 | Permanent magnet synchronous motor alternating current and direct current shaft inductance testing method giving consideration to saturation situation |
| CN103472312A (en) * | 2013-09-29 | 2013-12-25 | 哈尔滨工业大学 | Testing method for iron core loss of alternating-current permanent magnet motors |
| CN103472312B (en) * | 2013-09-29 | 2015-07-08 | 哈尔滨工业大学 | Testing method for iron core loss of alternating-current permanent magnet motors |
| CN103472313B (en) * | 2013-09-29 | 2015-07-08 | 哈尔滨工业大学 | Permanent magnet synchronous motor alternating current and direct current shaft inductance testing method giving consideration to saturation situation |
| CN104034464A (en) * | 2014-06-28 | 2014-09-10 | 哈尔滨工业大学 | Even unit alternating-current permanent magnet motor torque ripple testing method |
| CN104034464B (en) * | 2014-06-28 | 2016-02-17 | 哈尔滨工业大学 | Even location AC magnetoelectric machine torque ripple method of testing |
| CN104360171A (en) * | 2014-11-17 | 2015-02-18 | 长春工程学院 | Method for measuring inductance parameter of permanent magnet synchronous motor |
| CN104360171B (en) * | 2014-11-17 | 2017-05-03 | 长春工程学院 | Method for measuring inductance parameter of permanent magnet synchronous motor |
| CN104634485A (en) * | 2015-03-07 | 2015-05-20 | 哈尔滨工业大学 | Simple testing method for moment coefficient of alternating current permanent magnetic motor |
| CN113311248A (en) * | 2021-06-25 | 2021-08-27 | 安徽大学 | Stator coil inductance measuring method for reluctance type spherical motor |
| CN113311248B (en) * | 2021-06-25 | 2022-05-10 | 安徽大学 | Stator coil inductance measuring method for reluctance type spherical motor |
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Application publication date: 20130612 |