CN110542818B - Method and system for testing electromagnetic compatibility of air conditioner motor - Google Patents
Method and system for testing electromagnetic compatibility of air conditioner motor Download PDFInfo
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- CN110542818B CN110542818B CN201910866240.2A CN201910866240A CN110542818B CN 110542818 B CN110542818 B CN 110542818B CN 201910866240 A CN201910866240 A CN 201910866240A CN 110542818 B CN110542818 B CN 110542818B
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- 238000012360 testing method Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004378 air conditioning Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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Abstract
The invention discloses a method and a system for testing electromagnetic compatibility of an air conditioner motor, wherein the method comprises the following steps: establishing an association model of the EMC value of the motor and the EMC value of the air conditioner; obtaining the EMC qualified value of the motor according to the EMC qualified value of the air conditioner; and judging the EMC performance of the motor according to the EMC value obtained by the current motor test and the EMC qualified value of the motor. By adopting the technical scheme of the invention, engineering technicians can conveniently control the EMC level of the motor, so that the probability of meeting the EMC performance standard of the air conditioner is improved.
Description
Technical Field
The invention relates to the field, in particular to a method and a system for testing electromagnetic compatibility of an air conditioner motor.
Background
The air conditioning equipment has corresponding electromagnetic compatibility (EMC) index requirements on electromagnetic interference and interference resistance, the air conditioning equipment is mainly used as a whole to define a qualified line, but no parameter requirements are provided for selected devices such as an air supply motor and the like, and no measurement means is provided for the contribution of the motor to the EMC test result of the air conditioner.
In the existing technical standard, the EMC technical index of the motor is not set, and the EMC index of the motor can influence the EMC index of the air conditioner to a great extent. If the EMC index of the motor is unqualified, the EMC index of the air conditioner can be influenced to be unqualified.
Disclosure of Invention
The invention aims to provide a method and a system for testing electromagnetic compatibility of an air conditioner motor, aiming at the technical problem that a software menu in the prior art is inconvenient to operate.
In an embodiment of the present invention, an electromagnetic testing method for an air conditioner motor is provided, which includes:
establishing an association model of the EMC value of the motor and the EMC value of the air conditioner;
obtaining the EMC qualified value of the motor according to the EMC qualified value of the air conditioner;
and judging the EMC performance of the motor according to the EMC value obtained by the current motor test and the EMC qualified value of the motor.
In the embodiment of the invention, the establishing of the correlation model of the EMC value of the motor and the EMC value of the air conditioner comprises the following steps:
extracting an EMC value A of the air conditioner and an EMC value D of the motor from a power supply side of the air conditioner and a direct current high voltage side of the motor respectively under a set test condition;
fitting the EMC value A of the air conditioner obtained by the plurality of groups of tests with the EMC value D of the motor to obtain an associated model of the EMC value D of the motor and the EMC value A of the air conditioner: d = f (a).
In the embodiment of the invention, the fitted correlation model of the EMC value of the motor and the EMC value of the air conditioner is as follows:
D=f（A）=kA²+bA+n，
wherein k, b and n are constants obtained after fitting.
In the embodiment of the invention, the obtaining of the EMC qualified value of the motor according to the EMC qualified value of the air conditioner comprises the following steps:
substituting the EMC passing value a1 of the air conditioner into the correlation model D = f (a) = kA + bA + n, resulting in the EMC passing value D1 of the motor.
In the embodiment of the invention, the EMC performance of the motor is judged according to the EMC value tested by the current motor and the EMC qualified value of the motor, and the EMC performance judgment method comprises the following steps:
when D is less than D1-M, judging the EMC performance of the motor to be excellent;
when D is less than or equal to D1, judging that the EMC performance of the motor is good;
when D is larger than D1, judging that the EMC performance of the motor is poor;
wherein D is the EMC value obtained by the current motor test, and M is the set parameter.
In an embodiment of the present invention, a system for testing electromagnetic compatibility of an air conditioner motor is further provided, which is characterized by including:
the modeling module is used for establishing a correlation model of the EMC value of the motor and the EMC value of the air conditioner;
the calculation module is used for obtaining the EMC qualified value of the motor according to the correlation model and the EMC qualified value of the air conditioner;
and the judgment module is used for judging the EMC performance of the motor according to the EMC value obtained by the current motor test and the EMC qualified value of the motor.
In the embodiment of the invention, the modeling module fits a plurality of groups of EMC values D of the motor and EMC values A of the air conditioner obtained through testing to obtain an associated model of the EMC values D of the motor and the EMC values A of the air conditioner: d = f (a).
In the embodiment of the present invention, the association model D = f (a) is specifically as follows:
D=f（A）=kA²+bA+n，
wherein k, b and n are constants obtained after fitting.
In the embodiment of the invention, the calculation module substitutes the EMC qualified value A1 of the air conditioner into the correlation model D = f (A) to obtain the EMC qualified value D1 of the motor.
In the embodiment of the present invention, the determining module determines the EMC performance of the motor according to the EMC value D tested by the current motor and the EMC qualified value D1 of the motor as follows:
when D is less than D1-M, judging the EMC performance of the motor to be excellent;
when D is less than or equal to D1, judging that the EMC performance of the motor is good;
when D is larger than D1, judging that the EMC performance of the motor is poor;
wherein M is a set parameter.
Compared with the prior art, in the method and the system for testing the electromagnetic compatibility of the air conditioner motor, the EMC value of the motor and the EMC value of the air conditioner are established to convert the electromagnetic interference index of the air conditioner into the control index of the motor, and the EMC performance of the motor is graded, so that engineering technicians can conveniently control the EMC level of the motor, and the probability of meeting the EMC performance standard of the air conditioner is improved.
Drawings
Fig. 1 is a flowchart of an electromagnetic compatibility testing method for an air conditioning motor of an air conditioning motor according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of extracting EMC values of the air conditioner and the motor in the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an electromagnetic compatibility testing system of an air conditioner motor according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the embodiment of the invention provides an electromagnetic testing method for an air conditioner motor, which includes steps S1-S3. The following description will be made separately.
Step S1: and establishing an association model of the EMC value of the motor and the EMC value of the air conditioner.
In the technical standards of air conditioners, EMC performance indexes of air conditioners are clearly defined, but EMC indexes of motors are not defined. Technical personnel find that the EMC index of the motor can influence the EMC index of the air conditioner to a great extent, and if the EMC index of the motor is unqualified during the assembly of the air conditioner, the EMC index of the air conditioner can be unqualified. Therefore, in the embodiment of the present invention, a correlation model between the EMC value of the motor and the EMC value of the air conditioner needs to be established, and a corresponding relationship between the EMC value of the motor and the EMC value of the air conditioner needs to be found.
In the embodiment of the invention, the specific process of establishing the correlation model of the EMC value of the motor and the EMC value of the air conditioner comprises the following steps:
extracting an EMC value A of the air conditioner and an EMC value D of the motor from a power supply side of the air conditioner and a direct current high voltage side of the motor respectively under a set test condition;
fitting the EMC value A of the air conditioner obtained by the plurality of groups of tests with the EMC value D of the motor to obtain an associated model of the EMC value D of the motor and the EMC value A of the air conditioner: d = f (a).
As shown in fig. 2, the air-conditioning power supply side provides two paths of direct current power supplies, a high voltage vdc and a low voltage Vsp through the rectification circuit, wherein the high voltage vdc is a winding power supply of the motor, the low voltage Vsp is a speed regulation voltage of a motor driving board, and the motor can reach a nominal output torque IX by regulating Vsp. In a specific test, the EMC value of the motor and the EMC value of the air conditioner are extracted through EMC test equipment (such as a power receiving clamp) when the motor reaches a nominal output torque state. And respectively adopting a plurality of air conditioners for testing to obtain the EMC values A of the air conditioners and the EMC values D of the motors, and then fitting. After a plurality of experiments, technicians find that the fitted correlation model of the EMC value of the motor and the EMC value of the air conditioner is as follows:
D=f（A）=kA²+bA+n，
wherein k, b and n are constants obtained after fitting.
Step S2: and obtaining the EMC qualified value of the motor according to the EMC qualified value of the air conditioner.
It should be noted that, since the air conditioning specification does not include the EMC specification of the motor, in the embodiment of the present invention, after obtaining the correlation model between the EMC value of the motor and the EMC value of the air conditioner, the EMC passing value a1 of the air conditioner is substituted into the correlation model D = f (a) = kA + bA + n, so that the EMC passing value D1 of the motor can be obtained.
Step S3: and judging the EMC performance of the motor according to the EMC value obtained by the current motor test and the EMC qualified value of the motor.
In the embodiment of the invention, the EMC performance of the motor is judged according to the EMC value tested by the current motor and the EMC qualified value of the motor, and the EMC performance judgment method comprises the following steps:
when D is less than D1-M, judging the EMC performance of the motor to be excellent;
when D is less than or equal to D1, judging that the EMC performance of the motor is good;
when D is larger than D1, judging that the EMC performance of the motor is poor;
wherein D is the EMC value obtained by the current motor test, and M is the set parameter. Preferably, M =3 may be set.
Before the motor is assembled to the air conditioner, whether the motor is qualified or not can be judged according to the EMC value of the motor, the unqualified motor is separated out, and the qualified motor is assembled to the air conditioner, so that the air conditioner can meet the EMC performance in the technical standard of the air conditioner.
As shown in fig. 3, in the embodiment of the present invention, a system for testing electromagnetic compatibility of an air conditioner motor is further provided, which includes a modeling module 31, a calculating module 32, and a determining module 33. The following description will be made separately.
The modeling module 31 is used for establishing a correlation model of the EMC value of the motor and the EMC value of the air conditioner. The modeling module 31 fits the EMC value D of the motor and the EMC value A of the air conditioner obtained by the multiple groups of tests to obtain an associated model of the EMC value D of the motor and the EMC value A of the air conditioner: d = f (a).
In particular, the correlation model D = f (a) = kA + bA + n,
wherein k, b and n are constants obtained after fitting.
And the calculation module 32 is used for obtaining the EMC qualified value of the motor according to the correlation model and the EMC qualified value of the air conditioner. The calculating module 32 substitutes the EMC passing value a1 of the air conditioner into the correlation model D = f (a) to obtain the EMC passing value D1 of the motor.
And the judging module 33 is used for judging the EMC performance of the motor according to the EMC value obtained by the current motor test and the EMC qualified value of the motor.
In the embodiment of the present invention, the determining module 33 determines the EMC performance of the motor according to the EMC value D tested by the current motor and the EMC qualified value D1 of the motor as follows:
when D is less than D1-M, judging the EMC performance of the motor to be excellent;
when D is less than or equal to D1, judging that the EMC performance of the motor is good;
when D is larger than D1, judging that the EMC performance of the motor is poor;
wherein M is a set parameter.
In conclusion, in the method and the system for testing the electromagnetic compatibility of the air conditioner motor, the EMC value of the motor and the EMC value of the air conditioner are established to convert the electromagnetic interference index of the air conditioner into the control index of the motor, the EMC performance of the motor is graded, engineering technicians can conveniently control the EMC level of the motor, and the probability of meeting the EMC performance standard of the air conditioner is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A method for testing electromagnetic compatibility of an air conditioner motor is characterized by comprising the following steps:
establishing an association model of the EMC value of the motor and the EMC value of the air conditioner;
obtaining the EMC qualified value of the motor according to the EMC qualified value of the air conditioner;
the EMC performance of the motor is judged according to the EMC value obtained by the current motor test and the EMC qualified value of the motor,
establishing an association model of the EMC value of the motor and the EMC value of the air conditioner, wherein the association model comprises the following steps:
extracting an EMC value A of the air conditioner and an EMC value D of the motor from a power supply side of the air conditioner and a direct current high voltage side of the motor respectively under a set test condition;
fitting the EMC value A of the air conditioner obtained by the plurality of groups of tests with the EMC value D of the motor to obtain an associated model of the EMC value D of the motor and the EMC value A of the air conditioner: d = f (a).
2. The method for testing the electromagnetic compatibility of the air conditioner motor as claimed in claim 1, wherein the fitted correlation model of the EMC value of the motor and the EMC value of the air conditioner is as follows:
D=f（A）=kA²+bA+n，
wherein k, b and n are constants obtained after fitting.
3. The method for testing the electromagnetic compatibility of the air conditioner motor as claimed in claim 1, wherein the step of obtaining the EMC qualified value of the motor according to the EMC qualified value of the air conditioner comprises the following steps:
and substituting the EMC qualified value A1 of the air conditioner into the correlation model D = f (A) to obtain the EMC qualified value D1 of the motor.
4. The method for testing the electromagnetic compatibility performance of the air conditioner motor as claimed in claim 3, wherein the EMC performance of the motor is judged according to the EMC value tested by the current motor and the EMC qualified value of the motor, and the method comprises the following steps:
when D is less than D1-M, judging the EMC performance of the motor to be excellent;
when D is less than or equal to D1, judging that the EMC performance of the motor is good;
when D is larger than D1, judging that the EMC performance of the motor is poor;
wherein D is the EMC value obtained by the current motor test, and M is the set parameter.
5. The utility model provides a test system of air conditioner motor electromagnetic compatibility ability which characterized in that includes:
the modeling module is used for establishing an association model of the EMC value of the motor and the EMC value of the air conditioner, and the modeling module is used for fitting the EMC value D of the motor and the EMC value A of the air conditioner obtained through multiple groups of tests to obtain an association model of the EMC value D of the motor and the EMC value A of the air conditioner: d = f (a);
the calculation module is used for obtaining the EMC qualified value of the motor according to the correlation model and the EMC qualified value of the air conditioner;
and the judgment module is used for judging the EMC performance of the motor according to the EMC value obtained by the current motor test and the EMC qualified value of the motor.
6. The system for testing electromagnetic compatibility of an air conditioner motor as claimed in claim 5, wherein said correlation model D = f (A) is as follows:
D=f（A）=kA²+bA+n，
wherein k, b and n are constants obtained after fitting.
7. The system for testing the electromagnetic compatibility of the air conditioner motor as recited in claim 5, wherein said calculating module substitutes the EMC passing value A1 of the air conditioner into said correlation model D = f (A) to obtain the EMC passing value D1 of the motor.
8. The system for testing the electromagnetic compatibility of the air conditioner motor as recited in claim 7, wherein the judging module judges the EMC performance of the motor according to the EMC value D tested by the current motor and the EMC qualified value D1 of the motor by the following steps:
when D is less than D1-M, judging the EMC performance of the motor to be excellent;
when D is less than or equal to D1, judging that the EMC performance of the motor is good;
when D is larger than D1, judging that the EMC performance of the motor is poor;
wherein M is a set parameter.
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| CN201910866240.2A CN110542818B (en) | 2019-09-12 | 2019-09-12 | Method and system for testing electromagnetic compatibility of air conditioner motor |
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| CN201910866240.2A CN110542818B (en) | 2019-09-12 | 2019-09-12 | Method and system for testing electromagnetic compatibility of air conditioner motor |
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| CN110542818B true CN110542818B (en) | 2020-11-24 |
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2019
- 2019-09-12 CN CN201910866240.2A patent/CN110542818B/en active Active
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| CN104635089A (en) * | 2015-02-10 | 2015-05-20 | 北京理工大学 | Conduction electromagnetic interference experimental platform for electric automobile motor driving system |
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| CN206804764U (en) * | 2017-05-31 | 2017-12-26 | 安徽江淮汽车集团股份有限公司 | A kind of automobile motor load simulation system and electromagnetic compatibility test system |
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