CN107086833B - A method of detection heat pump compressor magnetic linkage - Google Patents
A method of detection heat pump compressor magnetic linkage Download PDFInfo
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- CN107086833B CN107086833B CN201710386842.9A CN201710386842A CN107086833B CN 107086833 B CN107086833 B CN 107086833B CN 201710386842 A CN201710386842 A CN 201710386842A CN 107086833 B CN107086833 B CN 107086833B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 title description 2
- 230000004907 flux Effects 0.000 claims description 42
- 238000004804 winding Methods 0.000 claims description 18
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000011160 research Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012827 research and development Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P21/141—Flux estimation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention provides a kind of methods for detecting heat pump compressor magnetic linkage, comprising the following steps: S1, parameter initialization；S2, open it is enabled, according to certain angular frequency idle running；S3, pi regulator adjust d shaft current to given value；S4, first group of d shaft current and q shaft voltage are recorded；S5, according to certain angular frequency idle running；S6, pi regulator adjust d shaft current to given value；S7, second group of d shaft current and q shaft voltage are recorded；S8, magnetic linkage is calculated.The beneficial effects of the present invention are: for different compressors, research and development are debugged again again without research staff, heat pump compressor electric-control system constructs compressor model, can drive the compressor of different parameters by study compressor magnetic linkage parameter.
Description
Technical Field
The invention relates to heat pump detection, in particular to a method for detecting flux linkage of a heat pump compressor.
Background
At present, an electric control system of a heat pump compressor is directly input into software for debugging according to the parameters of a specification of the compressor, and has the defects that: an electric control system of a heat pump compressor usually corresponds to a compressor, once the compressor is replaced, if the difference between the parameters of the compressor and the parameters of the compressor is very large, the compressor cannot be normally used, and the electric control system is usually required to be debugged by research personnel according to a new compressor. That is, the electric control system of the heat pump compressor can only drive one compressor.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for detecting a flux linkage of a heat pump compressor.
The invention provides a method for detecting flux linkage of a heat pump compressor, which comprises the following steps:
s1, initializing parameters;
s2, enabling, and carrying out no-load operation according to a certain angular frequency;
s3, adjusting the d-axis current to a given value by a PI regulator;
s4, recording a first group of d-axis current and q-axis voltage;
s5, carrying out no-load operation according to a certain angular frequency;
s6, adjusting the d-axis current to a given value by a PI regulator;
s7, recording a second group of d-axis current and q-axis voltage;
and S8, calculating the magnetic linkage.
As a further improvement of the invention, the calculation process of the magnetic linkage is as follows: the heat pump compressor adopts star type connection, and the current sum of three-phase stator current at the neutral point is zero, and the stator voltage equation:
wherein u isdIs the direct component of the stator voltage, uqIs the stator voltage quadrature component, idIs the direct component of the stator current, iqIs the quadrature-axis component of the stator current,is the direct-axis component of the stator flux linkage,is stator flux linkage quadrature component, omega is electrical angular frequency, RsIs the stator winding resistance, p is the differential operator,
whereinIs the direct-axis component of the stator flux linkage,is the stator flux linkage quadrature component, idIs the direct component of the stator current, iqIs stator current quadrature component, LdAs the direct component of the stator inductance，LqIs the quadrature component of the stator inductance,the flux linkage interlinking the stator windings generated for the permanent magnets,
the above two types are combined to obtain
Wherein u isdIs the direct component of the stator voltage, uqIs the stator voltage quadrature component, idIs the direct component of the stator current, iqIs the quadrature-axis component of the stator current,is the direct-axis component of the stator flux linkage,is stator flux linkage quadrature component, omega is electrical angular frequency, RsIs stator winding resistance, LdIs the direct component of the stator inductance, LqIs the quadrature component of the stator inductance,a flux linkage interlinking the stator windings generated for the permanent magnets;
current closed loop matched d-axis current no-load operation, iqVery small, neglected, then:
uq＝ωLdid+ωψf
wherein u isqIs the stator voltage quadrature component, idIs the stator current direct component, omega is the electrical angular frequency, LdIs the direct-axis component of the stator inductance,the flux linkage interlinking the stator windings generated for the permanent magnets,
two tests were carried out, so that
uq1＝ωLdid1+ωψf
uq2＝ωLdid2+ωψf
Wherein u isq1Data are recorded for the quadrature component of the stator voltage for the first test id1Recording data for the direct component of the stator current for the first test, uq2Recording data for quadrature component of stator voltage for the second test id2Data are recorded for the second test stator current direct component, ω is electrical angular frequency, LdIs the direct-axis component of the stator inductance,a flux linkage interlinking the stator windings generated for the permanent magnets;
the further simplification is that
uq1id2-uq2id1＝ω(id2-id1)ψf
ψf＝uq1id2-uq2id1/ω(id2-id1)
As can be seen from the above formula, two no-load tests were performed and i was recordedd、uqAnd omega, the magnetic linkage psi can be calculatedf。
The invention has the beneficial effects that: through the scheme, research personnel do not need to research and develop and debug the different compressors again, and the compressor model is constructed by learning the flux linkage parameters of the compressor, so that the compressors with different parameters can be driven.
Drawings
Fig. 1 is a schematic flow chart of a method for detecting flux linkage of a heat pump compressor according to the present invention.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
As shown in fig. 1, a method for detecting flux linkage of a heat pump compressor includes the following steps:
s1, initializing parameters;
s2, enabling, and carrying out no-load operation according to a certain angular frequency;
s3, adjusting the d-axis current to a given value by a PI regulator;
s4, recording a first group of d-axis current and q-axis voltage;
s5, carrying out no-load operation according to a certain angular frequency;
s6, adjusting the d-axis current to a given value by a PI regulator;
s7, recording a second group of d-axis current and q-axis voltage;
and S8, calculating the magnetic linkage.
As shown in fig. 1, the calculation process of the flux linkage is as follows: the heat pump compressor adopts star type connection, and the current sum of three-phase stator current at the neutral point is zero, and the stator voltage equation:
wherein u isdIs the direct component of the stator voltage, uqIs the stator voltage quadrature component, idIs the direct component of the stator current, iqIs the quadrature-axis component of the stator current,is the direct-axis component of the stator flux linkage,is stator flux linkage quadrature component, omega is electrical angular frequency, RsIs the stator winding resistance, p is the differential operator,
whereinIs the direct-axis component of the stator flux linkage,is the stator flux linkage quadrature component, idIs the direct component of the stator current, iqIs stator current quadrature component, LdIs the direct component of the stator inductance, LqIs the quadrature component of the stator inductance,the flux linkage interlinking the stator windings generated for the permanent magnets,
the above two types are combined to obtain
Wherein u isdIs the direct component of the stator voltage, uqIs the stator voltage quadrature component, idIs the direct component of the stator current, iqIs the quadrature-axis component of the stator current,is the direct-axis component of the stator flux linkage,is stator flux linkage quadrature component, omega is electrical angular frequency, RsIs stator winding resistance, LdIs the direct component of the stator inductance, LqIs the quadrature component of the stator inductance,a flux linkage interlinking the stator windings generated for the permanent magnets;
current closed loop matched d-axis current no-load operation, iqVery small, neglected, then:
uq＝ωLdid+ωψf
wherein u isqIs the stator voltage quadrature component, idIs the stator current direct component, omega is the electrical angular frequency, LdIs the direct-axis component of the stator inductance,the flux linkage interlinking the stator windings generated for the permanent magnets,
two tests were carried out, so that
uq1＝ωLdid1+ωψf
uq2＝ωLdid2+ωψf
Wherein u isq1Data are recorded for the quadrature component of the stator voltage for the first test id1Recording data for the direct component of the stator current for the first test, uq2Recording data for quadrature component of stator voltage for the second test id2Data are recorded for the second test stator current direct component, ω is electrical angular frequency, LdIs the direct-axis component of the stator inductance,a flux linkage interlinking the stator windings generated for the permanent magnets;
the further simplification is that
uq1id2-uq2id1＝ω(id2-id1)ψf
ψf＝uq1id2-uq2id1/ω(id2-id1)
As can be seen from the above formula, two no-load tests were performed and i was recordedd、uqAnd omega, the magnetic linkage psi can be calculatedf。
According to the method for detecting the flux linkage of the heat pump compressor, research personnel do not need to research, develop and debug different compressors again, and the electric control system of the heat pump compressor constructs a compressor model by learning the flux linkage parameters of the compressor, so that the compressor with different parameters can be driven.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (1)
1. A method for detecting flux linkage of a heat pump compressor is characterized in that: the method comprises the following steps:
s1, initializing parameters;
s2, enabling, and carrying out no-load operation according to a certain angular frequency;
s3, adjusting the d-axis current to a given value by a PI regulator;
s4, recording a first group of d-axis current and q-axis voltage;
s5, carrying out no-load operation according to a certain angular frequency;
s6, adjusting the d-axis current to a given value by a PI regulator;
s7, recording a second group of d-axis current and q-axis voltage;
s8, calculating a magnetic linkage;
wherein,
the calculation process of the flux linkage is as follows: the heat pump compressor adopts star type connection, and the current sum of three-phase stator current at the neutral point is zero, and the stator voltage equation:
wherein u isdIs the direct component of the stator voltage, uqIs the stator voltage quadrature component, idIs the direct component of the stator current, iqIs the quadrature-axis component of the stator current,is the direct-axis component of the stator flux linkage,is stator flux linkage quadrature component, omega is electrical angular frequency, RsIs the stator winding resistance, p is the differential operator,
whereinIs the direct-axis component of the stator flux linkage,is the stator flux linkage quadrature component, idIs the direct component of the stator current, iqIs stator current quadrature component, LdIs the direct component of the stator inductance, LqIs the quadrature component of the stator inductance,the flux linkage interlinking the stator windings generated for the permanent magnets,
the above two types are combined to obtain
Wherein u isdIs the direct component of the stator voltage, uqIs the stator voltage quadrature component, idIs the direct component of the stator current, iqIs the quadrature-axis component of the stator current,is the direct-axis component of the stator flux linkage,is stator flux linkage quadrature component, omega is electrical angular frequency, RsIs stator winding resistance, LdIs the direct component of the stator inductance, LqIs the quadrature component of the stator inductance,a flux linkage interlinking the stator windings generated for the permanent magnets;
current closed loop matched d-axis current no-load operation, iqVery small, neglected, then:
uq＝ωLdid+ωψf
wherein u isqIs the stator voltage quadrature component, idIs the stator current direct component, omega is the electrical angular frequency, LdIs the direct-axis component of the stator inductance,the flux linkage interlinking the stator windings generated for the permanent magnets,
two tests were carried out, so that
uq1＝ωLdid1+ωψf
uq2＝ωLdid2+ωψf
Wherein u isq1Data are recorded for the quadrature component of the stator voltage for the first test id1Recording data for the direct component of the stator current for the first test, uq2Recording data for quadrature component of stator voltage for the second test id2Data are recorded for the second test stator current direct component, ω is electrical angular frequency, LdIs the direct-axis component of the stator inductance,a flux linkage interlinking the stator windings generated for the permanent magnets;
the further simplification is that
uq1id2-uq2id1＝ω(id2-id1)ψf
ψf＝uq1id2-uq2id1/ω(id2-id1)
As can be seen from the above formula, two no-load tests were performed and i was recordedd、uqAnd omega, the magnetic linkage psi can be calculatedf。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103248306A (en) * | 2013-05-24 | 2013-08-14 | 天津大学 | Online decoupling identification method of multiple parameters of PMSM (permanent magnet synchronous motor) |
| CN103825524A (en) * | 2014-03-14 | 2014-05-28 | 中冶南方（武汉）自动化有限公司 | Offline identification method for basic electric appliance parameters of permanent-magnet synchronous motor |
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| CN103248306A (en) * | 2013-05-24 | 2013-08-14 | 天津大学 | Online decoupling identification method of multiple parameters of PMSM (permanent magnet synchronous motor) |
| CN103825524A (en) * | 2014-03-14 | 2014-05-28 | 中冶南方（武汉）自动化有限公司 | Offline identification method for basic electric appliance parameters of permanent-magnet synchronous motor |
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