CN105677975A - Modeling method of motor equivalent circuit - Google Patents
Modeling method of motor equivalent circuit Download PDFInfo
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- CN105677975A CN105677975A CN201610008927.9A CN201610008927A CN105677975A CN 105677975 A CN105677975 A CN 105677975A CN 201610008927 A CN201610008927 A CN 201610008927A CN 105677975 A CN105677975 A CN 105677975A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 230000003071 parasitic effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
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- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Control Of Ac Motors In General (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a modeling method of a motor equivalent circuit, which comprises the following steps: measuring multiple groups of circuit parameters among all phase circuits of a target motor and multiple groups of circuit parameters of all phase circuits relative to the ground; fitting the measured multiple groups of circuit parameters, and establishing an equivalent circuit according to the fitting result; wherein each set of circuit parameters includes a phase angle and an impedance. The modeling method of the motor equivalent circuit does not need to consider the actual connection method of each phase circuit coil of the target motor, does not need to extract parasitic parameters, has certain universality and has higher modeling speed.
Description
Technical field
The present invention relates to electric and electronic technical field, particularly relate to the modeling method of a kind of motor equivalent circuit.
Background technology
Owing to country is more and more higher to the requirement of EMC (electromagnetic compatibility), a lot of enterprises start application simulation prediction Terminal Disturbance Voltage conduction, to pinpoint the problems in advance. Due to conduction studies to as if small-signal and high-frequency signal, therefore that the accuracy requirement of circuit modeling is significantly high. Permagnetic synchronous motor is as the major source of convertible frequency air-conditioner Conduction Interference, and the accuracy of its equivalent circuit modeling is particularly important to EMC research.
Traditional circuit model is typically based on the practical structures of motor, extracts multiple parasitic parameter. Owing to the structure of motor is complicated, parasitic parameter during modeling is more, causes that model is complex.
Summary of the invention
Based on this, it is necessary to provide a kind of modeling method modeling simple motor equivalent circuit.
The modeling method of a kind of motor equivalent circuit, comprises the following steps:
Measure the many groups circuit parameter between each circuitry phase of target motor and each circuitry phase many groups of described circuit parameters over the ground;
The many groups of described circuit parameters measured are fitted, and set up equivalent circuit according to fitting result;
Wherein, often organize described circuit parameter and include phase angle and impedance.
Wherein in an embodiment, described equivalent circuit includes body circuit and circuit over the ground; The described many groups of described circuit parameters to measuring are fitted, and set up equivalent circuit step according to fitting result and include:
Many groups of described circuit parameters between the described each circuitry phase measured are made directly matching, and described each circuitry phase many groups of described circuit parameters over the ground are fitted;
Described body circuit and described circuit over the ground is set up according to fitting result.
Wherein in an embodiment, the number of phases of the circuit of described target motor is three-phase; Described equivalent circuit includes body circuit and the circuit over the ground of series connection; The described many groups of described circuit parameters to measuring are fitted, and set up equivalent circuit step according to fitting result and include:
Many groups of described circuit parameters between the described each circuitry phase measured are carried out Y-△ conversion respectively;
Each after Y-△ converts is organized described circuit parameter be fitted, and described each circuitry phase many groups of described circuit parameters over the ground are fitted;
Described body circuit and described circuit over the ground is set up according to fitting result.
Wherein in an embodiment, described body circuit includes multiple first concatenation unit, and each described first concatenation unit includes the resistance, electric capacity and the inductance that are in parallel;
Described circuit over the ground includes multiple second concatenation unit, and each described second concatenation unit includes the resistance, electric capacity and the inductance that are in series.
Wherein in an embodiment, the number of described first concatenation unit is drawn by the similarity of described many group circuit parameters and described matching.
Wherein in an embodiment, described first concatenation unit of part is the concordance of impedance described in matching, and described first concatenation unit of part is for revising the deviation of described phase angle.
Wherein in an embodiment, the method for each circuitry phase of the described target motor of described measurement many groups of described circuit parameters over the ground is:
When measuring each circuitry phase many groups of described circuit parameters over the ground, shield the interference of other each circuitry phases.
Wherein in an embodiment, the modeling method of described motor equivalent circuit also includes:
By the many groups circuit parameter between each circuitry phase of target motor described in test device measuring and each circuitry phase many groups of described circuit parameters over the ground.
Wherein in an embodiment, described test equipment includes at least one in electric bridge, electric impedance analyzer and Network Analyzer.
Wherein in an embodiment, described target motor is the motor of household electrical appliance.
The modeling method of above-mentioned motor equivalent circuit, measures the many groups circuit parameter between each circuitry phase of target motor and each circuitry phase many groups circuit parameter over the ground; Then the many groups circuit parameter measured being fitted, and set up equivalent circuit according to fitting result, it is not necessary to consider the actual connection of each circuitry phase coil of target motor, without extracting parasitic parameter, and have certain versatility, modeling speed is very fast.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of one embodiment of modeling method of motor equivalent circuit of the present invention
Fig. 2 is the equivalent circuit diagram in one embodiment of modeling method of motor equivalent circuit of the present invention
Fig. 3 is the partial circuit diagram over the ground of the equivalent circuit of another embodiment of modeling method of motor equivalent circuit of the present invention.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the detailed description of the invention of the modeling method of motor equivalent circuit of the present invention is illustrated. Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, in an embodiment, the modeling method of motor equivalent circuit may comprise steps of:
S100, measures the many groups circuit parameter between each circuitry phase of target motor and each circuitry phase many groups circuit parameter over the ground.
In one embodiment, each circuitry phase of target motor includes three-phase circuit, respectively U phase, V phase and W phase. For three-phase circuit, the modeling method of motor equivalent circuit is illustrated below, but be not limited thereto. Wherein, circuit parameter can include impedance and phase angle.
Concrete, the process measuring the many groups circuit parameter between each circuitry phase of target motor can be: measures the many groups circuit parameter between U phase and V phase respectively, measure the many groups circuit parameter between U phase and W phase, and measure the many groups circuit parameter between V phase and W phase. Often group circuit parameter can include impedance and phase angle. Multiple impedances between U phase and the V phase measured can form impedance curve, and multiple phase angles can form phase angle curve. Same, the multiple impedances between U phase and the W phase measured can form impedance curve, and multiple phase angles can form phase angle curve.Multiple impedances between V phase and the W phase measured can form impedance curve, and multiple phase angles can form phase angle curve.
It addition, the process of many groups circuit parameter that each circuitry phase of measurement target motor is over the ground can be: measure each circuitry phase many groups circuit parameter over the ground, and shield the interference of other each circuitry phases simultaneously. In the present embodiment, it is modeled by the impedance between every circuit of target motor to ground and phase angle. Owing to there is no actual connection between target motor with ground, therefore can pass through to test to obtain each circuitry phase many groups circuit parameter over the ground, need to change test connection to shield the interference of other each circuitry phases simultaneously.
S200, is fitted the many groups circuit parameter measured, and sets up equivalent circuit according to fitting result.
Wherein, equivalent circuit can include the body circuit that is in series and circuit over the ground. Many groups circuit parameter between body circuit and each circuitry phase of target motor of equivalent circuit is corresponding. The circuit over the ground of equivalent circuit is corresponding with each circuitry phase of target motor many groups circuit parameter over the ground.
In one embodiment, step S200 can be realized by following steps:
First, the many groups circuit parameter between each circuitry phase measured is made directly matching, and each circuitry phase many groups circuit parameter over the ground is fitted.
Then, body circuit and the circuit over the ground of equivalent circuit is set up according to fitting result.
Now, if connecing for star between each circuitry phase of target motor, then the body circuit of equivalent circuit also connects for star. If for corner connection between each circuitry phase of target motor, then the body circuit of equivalent circuit is also for corner connection.
In another embodiment, step S200 can also be realized by following steps:
First, the many groups circuit parameter between each circuitry phase measured is carried out Y-△ conversion respectively.
Then, each group circuit parameter after Y-△ converts is fitted, and each circuitry phase many groups circuit parameter over the ground is fitted.
Finally, body circuit and the circuit over the ground of equivalent circuit is set up according to fitting result.
Now, if connecing for star between each circuitry phase of target motor, then the body circuit of equivalent circuit is corner connection. If for corner connection between each circuitry phase of target motor, then the body circuit of equivalent circuit is that star connects.
It should be understood that the body circuit of the many groups circuit parameter correspondence equivalent circuit between each circuitry phase of target motor, the circuit over the ground of each circuitry phase of target motor many groups circuit parameter correspondence equivalent circuit over the ground. In one embodiment, body circuit can include multiple first concatenation unit. Each first concatenation unit can include the resistance, electric capacity and the inductance that are in parallel. The number of the first concatenation unit is drawn by the similarity organizing circuit parameter and matching more. When the similarity height of matching is different, the number of the first concatenation unit can be changed, to meet modeling demand. When circuit parameter includes impedance and phase angle, part the first concatenation unit is for the concordance of matching impedance, and part the first concatenation unit is used for revising phase angular displacement. The priority order of connection of each the first concatenation unit is not then limited.
It addition, circuit can include multiple second concatenation unit over the ground. Each second concatenation unit can include the resistance, electric capacity and the inductance that are in series. Circuit on one side ground connection over the ground, the other end is connected with body circuit.
Referring to Fig. 2, in an embodiment, target motor is frequency converting air-conditioner compressor motor.Many groups circuit parameter between each circuitry phase measured is made directly matching, and each circuitry phase many groups circuit parameter over the ground is fitted. Then, equivalent circuit is set up according to fitting result. Wherein the first half circuit in Fig. 2 is body circuit. Body circuit includes multiple first concatenation unit. Each first concatenation unit includes the inductance, resistance and the electric capacity that are in parallel. Body circuit includes U phase, V phase and W phase three-phase circuit, and three-phase circuit is corner connection. Each circuitry phase includes multiple first concatenation unit. The latter half circuit in Fig. 2 is circuit over the ground. Circuit includes multiple second concatenation unit over the ground. Second concatenation unit includes the resistance, electric capacity and the inductance that are in series. Each the second concatenation unit one end is connected to ground, and the other end is connected with U phase, V phase or W circuitry phase.
Referring to Fig. 3, in an embodiment, the many groups circuit parameter between each circuitry phase measured is carried out Y-△ conversion respectively. Then each group circuit parameter after Y-△ converts is fitted, and each circuitry phase many groups circuit parameter over the ground is fitted. Finally according to the equivalent circuit that fitting result is set up. Wherein the first half circuit in Fig. 3 is body circuit. Body circuit includes multiple first concatenation unit. Each first concatenation unit includes the inductance, resistance and the electric capacity that are in parallel. Body circuit includes U phase, V phase and W phase three-phase circuit, and three-phase circuit is that star connects. Each circuitry phase includes multiple first concatenation unit. The latter half circuit in Fig. 2 is circuit over the ground. Circuit includes multiple second concatenation unit over the ground. Second concatenation unit includes the resistance, electric capacity and the inductance that are in series. Each the second concatenation unit one end is connected to ground, and the other end is connected with U phase, V phase or W circuitry phase.
Furthermore it is possible to by the many groups circuit parameter between each circuitry phase of relevant test device measuring target motor and each circuitry phase many groups circuit parameter over the ground. Concrete, this test equipment can be the more than one test equipment in electric bridge, electric impedance analyzer and Network Analyzer etc.
Above in each embodiment, target motor can be the motor in household electrical appliance. Such as, target motor is air-conditioning draught fan motor, motor for washer etc. After drawing equivalent circuit, it is possible to by equivalent circuit, the circuit of target motor is analyzed.
The modeling method of above-mentioned motor equivalent circuit, measures the many groups circuit parameter between each circuitry phase of target motor and each circuitry phase many groups circuit parameter over the ground; Then the many groups circuit parameter measured is fitted, and sets up equivalent circuit according to fitting result. The modeling method of above-mentioned motor equivalent circuit, it is not necessary to consider the actual connection of each circuitry phase coil of target motor, without extracting parasitic parameter, and has certain versatility, and the model of equivalent circuit is relatively simple and modeling speed is very fast.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention. It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the modeling method of a motor equivalent circuit, it is characterised in that comprise the following steps:
Measure the many groups circuit parameter between each circuitry phase of target motor and each circuitry phase many groups of described circuit parameters over the ground;
The many groups of described circuit parameters measured are fitted, and set up equivalent circuit according to fitting result;
Wherein, often organize described circuit parameter and include phase angle and impedance.
2. the modeling method of motor equivalent circuit according to claim 1, it is characterised in that described equivalent circuit includes body circuit and circuit over the ground; The described many groups of described circuit parameters to measuring are fitted, and set up equivalent circuit step according to fitting result and include:
Many groups of described circuit parameters between the described each circuitry phase measured are made directly matching, and described each circuitry phase many groups of described circuit parameters over the ground are fitted;
Described body circuit and described circuit over the ground is set up according to fitting result.
3. the modeling method of motor equivalent circuit according to claim 1, it is characterised in that the number of phases of the circuit of described target motor is three-phase; Described equivalent circuit includes body circuit and the circuit over the ground of series connection; The described many groups of described circuit parameters to measuring are fitted, and set up equivalent circuit step according to fitting result and include:
Many groups of described circuit parameters between the described each circuitry phase measured are carried out Y-△ conversion respectively;
Each after Y-△ converts is organized described circuit parameter be fitted, and described each circuitry phase many groups of described circuit parameters over the ground are fitted;
Described body circuit and described circuit over the ground is set up according to fitting result.
4. the modeling method of the motor equivalent circuit according to Claims 2 or 3, it is characterised in that described body circuit includes multiple first concatenation unit, and each described first concatenation unit includes the resistance, electric capacity and the inductance that are in parallel;
Described circuit over the ground includes multiple second concatenation unit, and each described second concatenation unit includes the resistance, electric capacity and the inductance that are in series.
5. the modeling method of motor equivalent circuit according to claim 4, it is characterised in that the number of described first concatenation unit is drawn by the similarity of described many group circuit parameters and described matching.
6. the modeling method of motor equivalent circuit according to claim 4, it is characterised in that described first concatenation unit of part is the concordance of impedance described in matching, described first concatenation unit of part is for revising the deviation of described phase angle.
7. the modeling method of the motor equivalent circuit according to claims 1 to 3 any one, it is characterised in that the method for each circuitry phase of the described target motor of described measurement many groups of described circuit parameters over the ground is:
When measuring each circuitry phase many groups of described circuit parameters over the ground, shield the interference of other each circuitry phases.
8. the modeling method of motor equivalent circuit according to claim 1, it is characterised in that also include:
By the many groups circuit parameter between each circuitry phase of target motor described in test device measuring and each circuitry phase many groups of described circuit parameters over the ground.
9. the modeling method of motor equivalent circuit according to claim 8, it is characterised in that described test equipment includes at least one in electric bridge, electric impedance analyzer and Network Analyzer.
10. the modeling method of motor equivalent circuit according to claim 1, it is characterised in that described target motor is the motor of household electrical appliance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008927.9A CN105677975B (en) | 2016-01-04 | 2016-01-04 | Modeling method of motor equivalent circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008927.9A CN105677975B (en) | 2016-01-04 | 2016-01-04 | Modeling method of motor equivalent circuit |
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| CN105677975A true CN105677975A (en) | 2016-06-15 |
| CN105677975B CN105677975B (en) | 2020-03-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882170A (en) * | 2010-05-13 | 2010-11-10 | 江南大学 | Three-dimensional virtual brushless DC motor dynamic simulation method |
| CN102081867A (en) * | 2010-05-24 | 2011-06-01 | 北京科东电力控制系统有限责任公司 | All-digital high-voltage direct current transmission training stimulation system |
| CN102368672A (en) * | 2011-07-19 | 2012-03-07 | 株洲变流技术国家工程研究中心有限公司 | Simulation device and simulation method for soft start of motor |
| EP2477326A1 (en) * | 2011-01-18 | 2012-07-18 | Siemens Aktiengesellschaft | Electromotor with parallel series connection of partial windings and method for operating same |
| DE102013012861A1 (en) * | 2013-08-01 | 2014-04-17 | Daimler Ag | Diagnostic method for electric machine of motor vehicle, involves determining impedance of coils of stator in angular positions, and stopping it on occurrence of electric error of respective coil |
-
2016
- 2016-01-04 CN CN201610008927.9A patent/CN105677975B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882170A (en) * | 2010-05-13 | 2010-11-10 | 江南大学 | Three-dimensional virtual brushless DC motor dynamic simulation method |
| CN102081867A (en) * | 2010-05-24 | 2011-06-01 | 北京科东电力控制系统有限责任公司 | All-digital high-voltage direct current transmission training stimulation system |
| EP2477326A1 (en) * | 2011-01-18 | 2012-07-18 | Siemens Aktiengesellschaft | Electromotor with parallel series connection of partial windings and method for operating same |
| CN102368672A (en) * | 2011-07-19 | 2012-03-07 | 株洲变流技术国家工程研究中心有限公司 | Simulation device and simulation method for soft start of motor |
| DE102013012861A1 (en) * | 2013-08-01 | 2014-04-17 | Daimler Ag | Diagnostic method for electric machine of motor vehicle, involves determining impedance of coils of stator in angular positions, and stopping it on occurrence of electric error of respective coil |
Non-Patent Citations (1)
| Title |
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| 汪泉弟 等: "三相交流电机的宽频等效电路建模方法", 《重庆电力高等专科学校学报》 * |
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