CN115184801B - Mutual feedback test system for coaxial high-speed permanent magnet synchronous motor - Google Patents
Mutual feedback test system for coaxial high-speed permanent magnet synchronous motor Download PDFInfo
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Abstract
The invention discloses a mutual feedback test system of a coaxial high-speed permanent magnet synchronous motor, which relates to the technical field of coaxial high-speed tests and solves the technical problem that the damping parameters of a tested motor are not taken into consideration, and when a specific test is carried out, the test result is influenced by the existence of the damping parameters, so that the test data has deviation; before testing, through the damping parameter, change the input power of different motors, adopt this kind of mode, eliminate the influence of damping parameter to the test motor, alright promote the degree of accuracy of test data, eliminate the error that exists in the test procedure.
Description
Technical Field
The invention belongs to the technical field of coaxial high-speed testing, and particularly relates to a mutual feedback testing system of a coaxial high-speed permanent magnet synchronous motor.
Background
The two permanent magnet synchronous motors are mutually independent, rotating shafts of the two permanent magnet synchronous motors are connected through a coupler to enable the two permanent magnet synchronous motors to rotate together to transmit torque, and for the coaxial high-speed permanent magnet synchronous motors, corresponding motor mutual-feed testing systems are required to be adopted to test the coaxial motors.
The invention with patent publication number CN104777425B discloses a mutual feed testing platform of a coaxial high-speed permanent magnet synchronous motor. The converter motor system that awaits measuring and load converter motor system are equipped with respectively to the pivot both sides, the surface is pasted and is had the foil gage in the middle of the pivot, it has temperature sensor to bury on the motor rotor of converter motor system that awaits measuring, the pivot tip in converter motor system one side that awaits measuring is equipped with the sliding ring, pivot center in converter motor system one side that awaits measuring is equipped with the cavity passageway, the foil gage, temperature sensor signal output wire passes through the cavity passageway and links to each other with the sliding ring, the sliding ring links to each other with the host computer, converter motor system and load converter motor system that awaits measuring are direct to be connected with the three-phase electric wire netting. The two motors share one rotating shaft without a coupler, so that the problems of coupler loss, serious vibration noise and the like caused by the difficulty in accurate coaxiality and two-shaft deviation during the performance test of the high-speed motor are effectively solved. And moreover, after the rotating shaft is drilled, a lead for transmitting output signals of the strain gauge and the temperature sensor can be placed.
When the mutual feedback test is performed on the coaxial high-speed motors, corresponding power parameters are generally input into the two groups of motors, the power parameters are kept unchanged, the two groups of motors are tested, test parameters are obtained, whether the coaxial high-speed motors are tested to be qualified or not is checked, but the test mode still has the following defects in the specific operation process and needs to be improved:
the inside rotor lubrication degree of different motors and other parameters all are different, and different motors are carrying out the during operation, all can receive inside rotor and internal gear's damping effect, and the rotational speed is all different, if not taking the damping parameter of test motor into account, when carrying out concrete test, can influence the test result because of the existence of damping parameter, lead to test data to have the deviation.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art; therefore, the invention provides a mutual feedback testing system of a coaxial high-speed permanent magnet synchronous motor, which is used for solving the technical problem that the testing data has deviation due to the fact that the testing result is influenced by the existence of damping parameters when a specific test is carried out without taking the damping parameters of the tested motor into consideration.
In order to achieve the above object, an embodiment according to a first aspect of the present invention provides a mutual feedback testing system for a coaxial high-speed permanent magnet synchronous motor, including a data acquisition end, a preliminary testing end, and a processing center;
the processing center comprises a damping parameter processing unit, a power limiting unit, a processing unit and a threshold unit;
the primary testing end is used for carrying out primary testing processing on the two groups of permanent magnet synchronous motors, separately testing the two groups of permanent magnet synchronous motors, determining that the input powers are consistent, obtaining the rotating speed values of the two groups of permanent magnet synchronous motors through processing, binding the two groups of rotating speed values into a first binding data packet, and transmitting the first binding data packet to the damping parameter processing unit;
the damping parameter processing unit receives the first binding data packet, extracts the rotating speed value in the first binding data packet, combines the two groups of rotating speed values to obtain a damping parameter, and transmits the damping parameter to the power limiting unit;
the power limiting unit receives the damping parameters, changes the input power parameters of different permanent magnet synchronous motors according to the specific parameters of the damping parameters, binds the power parameters into a second binding data packet, and transmits the second binding data packet to the processing unit;
and the processing unit is used for carrying out synchronous test processing on the two groups of permanent magnet synchronous motors according to the power parameters in the second binding data packet, acquiring motor parameters generated in the test process through the data acquisition end, and checking whether the mutual feedback test between the two groups of permanent magnet synchronous motors is qualified or not according to the acquired motor parameters.
Preferably, the mode of performing the preliminary test processing on the two groups of permanent magnet synchronous motors by the preliminary test terminal is as follows:
determining input power, testing the first group of permanent magnet synchronous motors to obtain the rotating speed value of the first group of permanent magnet synchronous motors, and marking as ZS 1 Subscript 1 represents the rotational speed value of the first group of permanent magnet synchronous motors;
testing the second group of permanent magnet synchronous motors, keeping the input power unchanged, acquiring the rotating speed value of the second group of permanent magnet synchronous motors, and marking as ZS 2 Subscript 2 represents the rotational speed value of the second group of permanent magnet synchronous motors;
two groups of rotating speed values ZS obtained by testing 1 And ZS 2 And binding to obtain a first binding data packet, and transmitting the binding data packet to a damping parameter processing unit in the processing center.
Preferably, the damping parameter processing unit performs combination processing on the two sets of rotation speed values in the following manner:
two groups of rotating speed values ZS 1 And ZS 2 Comparing by using ZN 2 =（ZS 1 -ZS 2 ) Obtaining damping parameter ZN by multiplying Y1 2 Wherein Y1 isPresetting parameters;
looking up damping parameter ZN 2 Positive and negative value of (1), when damping parameter ZN 2 When not less than 0, the subscript 2 is not changed, when the damping parameter ZN is 2 When the subscript 2 is changed to the subscript 1 when the subscript is less than 0, the damping parameter ZN at the moment 2 Is ZN 1 ；
Damping parameter ZN obtained by processing t Into the power defining unit, when t =1 or 2.
Preferably, the power limiting unit changes the input power parameters of different permanent magnet synchronous motors in a manner that:
extracting a damping parameter ZN t By using GB t =YS×（1+ZN t ) Obtaining a varying power parameter GB t YS is a preset power parameter, and specific values are set by an operator;
presetting a power parameter YS and a changing power parameter GB t And binding to generate a second binding data packet, and transmitting the second binding data packet to the processing unit.
Preferably, the processing unit performs synchronous test processing on the two groups of permanent magnet synchronous motors in the following manner:
s1, extracting a preset power parameter YS and changing a power parameter GB from a second bundled data packet t Looking at the change power parameter GB t If t is 1, the power parameter GB will be changed t As the test power of the first group of permanent magnet synchronous motors, a preset power parameter YS is used as the test power of the second group of permanent magnet synchronous motors, and if t is 2, a power parameter GB is changed t As the test power of the second group of permanent magnet synchronous motors, a preset power parameter YS is used as the test power of the first group of permanent magnet synchronous motors;
s2, after distribution is finished, the processing unit generates a collection instruction and controls a data collection end, the data collection end collects motor parameters, the collected motor parameters comprise motor rotating speed and rotor temperature values, and the motor rotating speed of the first group of permanent magnet synchronous motors is marked as DJ 1 Marking the rotor temperature value as ZZ 1 The motor rotating speed of the second group of permanent magnet synchronous motorsMarking as DJ 2 Marking the rotor temperature value as ZZ 2 ；
S3, adopt
Obtaining an evaluation parameter PJ of the first group of permanent magnet synchronous motors 1 And a second set of evaluation parameters PJ of the PMSM 2 Wherein C1 and C2 are both fixed coefficient factors, using
Obtaining a judgment parameter PD;
and S4, comparing the judging parameter PD with a threshold value YZ in the threshold value unit to obtain a comparison signal, generating a normal signal when the PD is less than or equal to the YZ, generating an abnormal signal when the PD is more than the YZ, and transmitting the generated comparison signal to the display terminal.
Preferably, the display terminal is configured to display the comparison signal, where the comparison signal is a normal signal and represents that the two corresponding sets of pmsm cross-feed tests are qualified, and the comparison signal is an abnormal signal and represents that the two corresponding sets of pmsm cross-feed tests are unqualified.
Compared with the prior art, the invention has the beneficial effects that: the method comprises the steps that preliminary test processing is conducted on two groups of permanent magnet synchronous motors, input power is kept consistent, damping parameters existing in the corresponding permanent magnet synchronous motors are obtained through the rotating speed difference of the two groups of permanent magnet synchronous motors, input power of different motors needing to be tested is changed according to the numerical value of the damping parameters, the influence of the damping parameters on the motors is eliminated through the changed input power, after input power distribution is completed, synchronous test processing is conducted on the two groups of permanent magnet synchronous motors, motor parameters generated in the test process are obtained, corresponding judgment parameters are obtained according to the difference of the motor parameters, the judgment parameters are compared with a threshold value in a threshold value unit, different comparison signals are obtained, and external personnel can judge whether the two groups of motors are qualified or not according to the comparison signals;
before testing, the input power of different motors is changed through the acquired damping parameters, and by adopting the mode, the influence of the damping parameters on the tested motors is eliminated, so that the accuracy of test data can be improved, and errors in the test process are eliminated.
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Fig. 1 is a schematic diagram of the principle of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present application provides a mutual feedback testing system for a coaxial high-speed permanent magnet synchronous motor, which includes a data acquisition end, a preliminary testing end, a processing center and a display terminal;
the data acquisition end is in bidirectional connection with the processing center, the output end of the preliminary test end is electrically connected with the input end of the processing center, and the output end of the processing center is electrically connected with the input end of the display terminal;
the processing center comprises a damping parameter processing unit, a power limiting unit, a processing unit and a threshold unit, wherein the output end of the damping parameter processing unit is electrically connected with the input end of the power limiting unit, the output end of the power limiting unit is electrically connected with the input end of the processing unit, and the processing unit is bidirectionally connected with the threshold unit;
preliminary test end for carry out preliminary test processing to two sets of PMSM, separately test two sets of PMSM, confirm that input power is in unanimity, obtain two sets of PMSM's rotational speed value through handling, wherein concrete test processing mode is:
determining input power, testing the first group of permanent magnet synchronous motors to obtain the rotating speed value of the first group of permanent magnet synchronous motors, and marking as ZS 1 Subscript 1 represents the speed value as the first set of permanent magnetsThe rotating speed value of the synchronous motor;
testing the second group of permanent magnet synchronous motors, keeping the input power unchanged, acquiring the rotating speed value of the second group of permanent magnet synchronous motors, and marking as ZS 2 Subscript 2 represents the rotational speed value of the second group of permanent magnet synchronous motors;
two groups of rotating speed values ZS obtained by testing 1 And ZS 2 And binding to obtain a first binding data packet, and transmitting the binding data packet to a damping parameter processing unit in the processing center.
The damping parameter processing unit receives the first binding data packet, extracts the rotating speed value inside the first binding data packet, and combines the two groups of rotating speed values to obtain the damping parameter, wherein the specific processing mode is as follows:
two groups of rotating speed values ZS 1 And ZS 2 Comparing by using ZN 2 =（ZS 1 -ZS 2 ) Obtaining damping parameter ZN by multiplying Y1 2 Wherein Y1 is a preset parameter, and the specific value is drawn up by an operator according to experience;
looking up damping parameter ZN 2 Positive and negative value of (1), when damping parameter ZN 2 When the value is more than or equal to 0, the subscript 2 is not changed, and when the damping parameter ZN 2 When the subscript 2 is changed to the subscript 1 when the subscript is less than 0, the damping parameter ZN at the moment 2 Is ZN 1 (specifically, when damping parameter ZN 2 More than or equal to 0, the rotating speed value of the first group of permanent magnet synchronous motors is larger than or equal to the rotating speed value of the second group of permanent magnet synchronous motors, then, under the condition of the same input power, the second group of permanent magnet synchronous motors have damping values relative to the first group of permanent magnet synchronous motors, and similarly, when the damping parameter ZN is larger than or equal to the damping parameter ZN 2 When the value is a negative value, the rotating speed value of the first group of permanent magnet synchronous motors is smaller, and then the second group of motors has a damping value relative to the first group of motors, so that the subscript 2 needs to be changed into the subscript 1, and the representative damping parameter is the damping value of the first group of synchronous motors);
damping parameter ZN obtained by processing t Into the power defining unit, when t =1 or 2.
The power limiting unit is used for limiting the damping parameter ZN t Receiving and according to a damping parameter ZN t The specific parameters of the permanent magnet synchronous motor are changed, and the power determination value is transmitted to the processing unit, wherein the specific change mode is as follows:
extracting a damping parameter ZN t By using GB t =YS×（1+ZN t ) Obtaining a varying power parameter GB t YS is a preset power parameter, and specific values are set by an operator;
presetting a power parameter YS and a changing power parameter GB t Binding is carried out, a second binding data packet is generated and transmitted to the processing unit;
the processing unit is used for synchronously testing and processing the two groups of permanent magnet synchronous motors according to the power parameters in the second binding data packet, acquiring the generated motor parameters in the testing process through the data acquisition end, and checking whether the mutual feedback test between the two groups of permanent magnet synchronous motors is qualified or not according to the acquired motor parameters, wherein the specific steps of carrying out synchronous testing and processing are as follows:
s1, extracting a preset power parameter YS and changing a power parameter GB from a second bundled data packet t Looking at the change power parameter GB t If t is 1, the power parameter GB will be changed t As the test power of the first group of permanent magnet synchronous motors, a preset power parameter YS is used as the test power of the second group of permanent magnet synchronous motors, and if t is 2, a power parameter GB is changed t As the test power of the second group of permanent magnet synchronous motors, a preset power parameter YS is used as the test power of the first group of permanent magnet synchronous motors;
s2, after distribution is finished, the processing unit generates a collection instruction to control the data collection end, the data collection end collects motor parameters, the collected motor parameters comprise motor rotating speed and rotor temperature value, and the motor rotating speed of the first group of permanent magnet synchronous motors is marked as DJ 1 The rotor temperature value is marked ZZ 1 Marking the motor rotating speed of the second group of permanent magnet synchronous motors as DJ 2 Marking the rotor temperature value as ZZ 2 ；
S3, adopting
Obtaining an evaluation parameter PJ of the first group of permanent magnet synchronous motors 1 And a second set of evaluation parameters PJ of the PMSM 2 Wherein C1 and C2 are both fixed coefficient factors, using
Obtaining a judgment parameter PD;
and S4, comparing the judging parameter PD with a threshold value YZ in the threshold value unit to obtain a comparison signal, generating a normal signal when the PD is less than or equal to the YZ, generating an abnormal signal when the PD is more than the YZ, and transmitting the generated comparison signal to the display terminal.
Specifically, when the comparison signal displayed by the display terminal is a normal signal, the test is qualified for the mutual feedback of the two corresponding sets of permanent magnet synchronous motors, and when the comparison signal displayed by the display terminal is an abnormal signal, the test is unqualified for the mutual feedback of the two corresponding sets of permanent magnet synchronous motors.
Part of data in the formula is obtained by removing dimension and taking the value to calculate, and the formula is obtained by simulating a large amount of collected data through software and is closest to a real situation; the preset parameters and the preset threshold values in the formula are set by those skilled in the art according to actual conditions or obtained through simulation of a large amount of data.
The working principle of the invention is as follows: the method comprises the steps that preliminary test processing is carried out on two groups of permanent magnet synchronous motors through a preliminary test end in advance, input power is guaranteed to be consistent in the test process, damping parameters existing in the corresponding permanent magnet synchronous motors are obtained through the rotating speed difference value of the two groups of permanent magnet synchronous motors, input power of different motors needing to be tested is changed according to the value of the damping parameters, the influence of the damping parameters on the motors is eliminated through the changed input power, after the input power is distributed, synchronous test processing is carried out on the two groups of permanent magnet synchronous motors, motor parameters generated in the test process are obtained, corresponding judgment parameters are obtained according to the difference of the motor parameters, the judgment parameters are compared with a threshold value in a threshold value unit, different comparison signals are obtained, and external personnel can judge whether the two groups of motors are qualified or not according to the comparison signals;
before testing, through the damping parameter who obtains, change the input power of different motors, adopt this kind of mode, eliminate the influence of damping parameter to the test motor, alright promote the degree of accuracy of test data, eliminate the error that exists in the test procedure.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (4)
1. A mutual feedback test system of a coaxial high-speed permanent magnet synchronous motor is characterized by comprising a data acquisition end, a preliminary test end, a processing center and a display terminal;
the processing center comprises a damping parameter processing unit, a power limiting unit, a processing unit and a threshold unit;
the primary testing end is used for carrying out primary testing processing on the two groups of permanent magnet synchronous motors, separately testing the two groups of permanent magnet synchronous motors, determining that the input powers are consistent, obtaining the rotating speed values of the two groups of permanent magnet synchronous motors through processing, binding the two groups of rotating speed values into a first binding data packet, and transmitting the first binding data packet to the damping parameter processing unit;
the damping parameter processing unit receives the first binding data packet, extracts the rotating speed value in the first binding data packet, combines the two groups of rotating speed values to obtain a damping parameter, and transmits the damping parameter to the power limiting unit;
the power limiting unit receives the damping parameters, changes the input power parameters of different permanent magnet synchronous motors according to the specific parameters of the damping parameters, binds the power parameters into a second binding data packet, and transmits the second binding data packet to the processing unit;
the processing unit is used for carrying out synchronous test processing on the two groups of permanent magnet synchronous motors according to power parameters in the second binding data packet, acquiring motor parameters generated in the test process through the data acquisition end, and checking whether the mutual feedback test between the two groups of permanent magnet synchronous motors is qualified or not according to the acquired motor parameters;
the mode of the primary test processing of the two groups of permanent magnet synchronous motors by the primary test end is as follows:
determining input power, testing the first group of permanent magnet synchronous motors to obtain the rotating speed value of the first group of permanent magnet synchronous motors, and marking as ZS 1 Subscript 1 represents the rotation speed value of the first group of permanent magnet synchronous motors;
testing the second group of permanent magnet synchronous motors, keeping the input power unchanged, acquiring the rotating speed value of the second group of permanent magnet synchronous motors, and marking as ZS 2 Subscript 2 represents the rotational speed value of the second group of permanent magnet synchronous motors;
two groups of rotating speed values ZS obtained by testing 1 And ZS 2 Binding to obtain a first binding data packet, and transmitting the binding data packet to a damping parameter processing unit in a processing center;
the damping parameter processing unit carries out merging processing on the two groups of rotating speed values in the following mode:
two groups of rotating speed values ZS 1 And ZS 2 Comparing by using ZN 2 =（ZS 1 -ZS 2 ) Obtaining damping parameter ZN by multiplying Y1 2 Wherein Y1 is a preset parameter;
looking at damping parameter ZN 2 Positive and negative value of (2) as a damping parameter ZN 2 When not less than 0, the subscript 2 is not changed, when the damping parameter ZN is 2 When the index is less than 0, the subscript 2 is changed into the subscript 1, and the damping parameter ZN is obtained at the moment 2 Is ZN 1 ；
The obtained damping parameter ZN is processed t Into the power defining unit, when t =1 or 2.
2. The system of claim 1, wherein the power limiting unit changes the input power parameters of different PMSM in a way that:
extracting a damping parameter ZN t By using GB t =YS×（1+ZN t ) Obtaining a varying power parameter GB t YS is a preset power parameter, and specific values are set by an operator;
presetting a power parameter YS and a changing power parameter GB t And binding to generate a second binding data packet, and transmitting the second binding data packet to the processing unit.
3. The system of claim 2, wherein the processing unit performs synchronous testing on the two groups of PMSM in a manner that:
s1, extracting a preset power parameter YS and changing a power parameter GB from a second bundled data packet t Looking up the change power parameter GB t If t is 1, the power parameter GB will be changed t As the test power of the first group of permanent magnet synchronous motors, a preset power parameter YS is used as the test power of the second group of permanent magnet synchronous motors, and if t is 2, a power parameter GB is changed t As the test power of the second group of permanent magnet synchronous motors, a preset power parameter YS is used as the test power of the first group of permanent magnet synchronous motors;
s2, after distribution is finished, the processing unit generates a collection instruction to control the data collection end, the data collection end collects motor parameters, the collected motor parameters comprise motor rotating speed and rotor temperature value, and the motor rotating speed of the first group of permanent magnet synchronous motors is marked as DJ 1 The rotor temperature value is marked ZZ 1 Marking the motor rotating speed of the second group of permanent magnet synchronous motors as DJ 2 Marking the rotor temperature value as ZZ 2 ；
S3, adopt
Obtaining an evaluation parameter PJ of the first group of permanent magnet synchronous motors 1 And a second group of evaluation parameters PJ of the permanent magnet synchronous motor 2 Wherein C1 and C2 are both fixed coefficient factors, using
Obtaining a judgment parameter PD;
and S4, comparing the judging parameter PD with a threshold YZ in the threshold unit to obtain a comparison signal, generating a normal signal when the PD is less than or equal to the YZ, generating an abnormal signal when the PD is more than the YZ, and transmitting the generated comparison signal to the display terminal.
4. The system of claim 3, wherein the display terminal is configured to display the comparison signal, the comparison signal indicates that the corresponding two groups of PMSM cross-feed tests are qualified when the comparison signal is a normal signal, and the comparison signal indicates that the corresponding two groups of PMSM cross-feed tests are unqualified when the comparison signal is an abnormal signal.
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