CN116559654A - Motor parameter verification method and system and vehicle - Google Patents

Motor parameter verification method and system and vehicle Download PDF

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Publication number
CN116559654A
CN116559654A CN202310485567.1A CN202310485567A CN116559654A CN 116559654 A CN116559654 A CN 116559654A CN 202310485567 A CN202310485567 A CN 202310485567A CN 116559654 A CN116559654 A CN 116559654A
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China
Prior art keywords
motor
tested
inductance value
axis inductance
current signal
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CN202310485567.1A
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Inventor
植万湖
杨勇
李新杰
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Shanghai Jinmai Electronic Technology Co ltd
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Shanghai Jinmai Electronic Technology Co ltd
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Priority to CN202310485567.1A priority Critical patent/CN116559654A/en
Publication of CN116559654A publication Critical patent/CN116559654A/en
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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
    • H02P21/22—Current control, e.g. using a current control loop
    • 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
    • G01R31/34—Testing dynamo-electric machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

The invention discloses a motor parameter verification method, a motor parameter verification system and a vehicle. The motor parameter verification method comprises the following steps of maintaining the rotating speed of a motor to be tested at a preset fixed rotating speed through a motor to be tested of a rack; outputting at least two groups of driving current signals to a motor to be tested through a motor controller; the motor to be tested operates according to the received driving current signal; the motor controller collects operation parameter data of the motor to be tested, and calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be tested under a preset driving current signal according to the operation parameter data. According to the technical scheme, the rotation speed of the motor to be detected is maintained by arranging the accompanying motor, at least two groups of driving current signals are output to the motor to be detected, the quadrature axis inductance value and the direct axis inductance value of the motor to be detected under the preset driving current signals are calculated, the calculated quadrature axis inductance value and direct axis inductance value can be used for calibrating the motor, the parameter requirements of the actual working condition of the motor are met, and the working efficiency of the motor is improved.

Description

Motor parameter verification method and system and vehicle
Technical Field
The invention relates to the technical field of motor testing, in particular to a motor parameter verification method and system and a vehicle.
Background
The permanent magnet synchronous motor widely used in new energy automobiles has the advantages of wide speed regulation range, high efficiency, high power density and the like. In the motor calibration process, parameters such as quadrature axis inductance, direct axis inductance and the like of the motor need to be known for vector control, and parameters provided by a motor factory are usually static parameters of a certain working point. The quadrature axis inductance and the direct axis inductance can change under different current combinations, so that actual parameters of the motor under different states are preferably adopted in actual use. The parameters provided by the motor factory are usually static parameters of a certain working point, and the motor cannot be adjusted to an optimal working state according to actual conditions, so that the working efficiency of the motor is affected.
Disclosure of Invention
The invention provides a motor parameter verification method, a motor parameter verification system and a motor vehicle, which are used for solving the problems that the motor is regulated by static parameters provided by a motor factory in the motor calibration process, the parameter requirements of the actual working condition of the motor cannot be met, and the working efficiency of the motor is affected.
According to one aspect of the invention, a motor parameter verification method is provided, and the motor parameter verification method is applied to a motor test system; comprising the following steps:
maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed through the accompanying motor of the rack;
outputting at least two groups of driving current signals to the motor to be tested through a motor controller;
the motor to be tested operates according to the received driving current signal;
and the motor controller collects the operation parameter data of the motor to be tested, and calculates the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under a preset driving current signal according to the operation parameter data.
Optionally, the accompanying motor through the rack maintains the rotation speed of the motor to be tested at a preset fixed rotation speed, including:
the accompanying motor is connected with the motor to be tested through the rack, and drags the rotating speed of the motor to be tested to a preset fixed rotating speed and maintains the rotating speed at the preset fixed rotating speed.
Optionally, the outputting, by the motor controller, at least two sets of driving current signals to the motor to be tested includes:
and outputting at least two groups of d-axis current signals and q-axis current signals to the motor to be tested through a motor controller.
Optionally, the outputting, by the motor controller, at least two sets of d-axis current signals and q-axis current signals to the motor to be tested includes:
outputting a d-axis current signal to the motor to be tested through a motor controller, wherein the d-axis current signal takes 20A as a step length value from zero to 400A;
and outputting a q-axis current signal to the motor to be tested through a motor controller, wherein the q-axis current signal takes 20A as a step length from zero to 400A.
Optionally, the motor to be tested operates according to the received current signal, including:
the motor to be tested operates according to the received at least two groups of d-axis current signals and q-axis current signals;
wherein each set of said drive current signals includes one said d-axis current signal and one said q-axis current signal.
Optionally, the motor controller collects operation parameter data of the motor to be tested, and calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be tested under a preset driving current signal according to the operation parameter data, including:
the motor controller collects operation parameter data of the motor to be tested; wherein the operating parameter data comprises: voltage data, current data and rotating speed data of the motor to be tested under each group of driving current signals;
and the motor controller calculates the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under a preset driving current signal based on a vector control voltage equation according to the operation parameter data and the driving current signal.
Optionally, after the motor controller collects the operation parameter data of the motor to be tested, and calculates the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under a preset driving current signal according to the operation parameter data, the method further includes:
and verifying the static motor parameters of the motor to be tested according to the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under the preset driving current to obtain verified motor parameters.
Optionally, after verifying the static motor parameter of the motor to be tested according to the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under the preset driving current, the method further includes:
calculating an optimal working point of the motor to be tested according to the verified motor parameters;
and controlling the motor to be tested to run at the optimal working point.
In a second aspect, an embodiment of the present invention provides a motor parameter verification system, including:
the rack is provided with a motor to be tested and a motor to be tested;
the accompanying motor is used for maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed;
the motor controller is used for outputting at least two groups of driving current signals to the motor to be tested;
the motor to be tested is used for running according to the received driving current signal;
and the motor controller is also used for collecting the operation parameter data of the motor to be tested and calculating the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under a preset driving current signal according to the operation parameter data.
In a third aspect, an embodiment of the present invention provides a new energy vehicle, including a motor to be tested for calibrating a quadrature axis inductance value and a direct axis inductance value obtained by the motor parameter verification method provided in any of the above aspects.
According to the technical scheme, the accompanying motor is arranged on the rack, the rotating speed of the motor to be measured is maintained at a preset fixed rotating speed, at least two groups of driving current signals are output to the electrode to be measured through the motor controller, the motor to be measured operates according to the received driving current signals, at the moment, operation parameter data of the motor to be measured are collected through the motor controller, and the quadrature axis inductance value and the direct axis inductance value of the motor to be measured under the preset driving current signals are calculated according to the operation parameter data. The motor parameter verification method provided by the embodiment of the invention realizes the measurement of the direct axis inductance and quadrature axis inductance data of the motor under different current conditions, improves the accuracy of inductance measurement and further ensures that the calibration of the motor is more accurate.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a motor parameter verification method provided by an embodiment of the invention;
FIG. 2 is a flowchart of another motor parameter verification method according to an embodiment of the present invention;
FIG. 3 is a flowchart of a motor parameter verification method according to an embodiment of the present invention;
FIG. 4 is a flowchart of a motor parameter verification method according to an embodiment of the present invention;
FIG. 5 is a flowchart of a motor parameter verification method according to an embodiment of the present invention;
FIG. 6 is a flowchart of a motor parameter verification method according to an embodiment of the present invention;
FIG. 7 is a flowchart of a motor parameter verification method according to an embodiment of the present invention;
FIG. 8 is a flowchart of a motor parameter verification method according to an embodiment of the present invention;
FIG. 9 is a logic diagram of a method for a motor controller to output a drive current signal according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a motor parameter verification system according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a new energy vehicle according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a flowchart of a motor parameter verification method according to an embodiment of the present invention. Referring to fig. 1, the motor parameter verification method provided by the embodiment of the invention is applied to a motor test system, and includes:
s101, maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed through the accompanying motor of the rack.
Specifically, the motor parameter verification method provided by the embodiment of the invention is mainly applied to the permanent magnet synchronous motor. The motor to be tested and the accompanying motor are both arranged on the rack, after the motor to be tested is started, the rotating speed is high, and in order to maintain the rotating speed of the motor to be tested at a preset fixed rotating speed, the rotating speed of the motor to be tested needs to be regulated by the accompanying motor, so that the preset fixed rotating speed is maintained, and the subsequent test requirements are met. For example, the preset fixed rotational speed may be at least one of 800 rpm, 1000 rpm, and 1200 rpm, without any limitation.
S102, outputting at least two groups of driving current signals to the motor to be tested through a motor controller.
Specifically, the motor controller is used for outputting driving current signals to the motor to be tested, and each group of driving current signals comprises a direct axis current signal and a quadrature axis current signal. In order to obtain the operation parameters of the motor to be tested under different current conditions, the motor controller needs to output at least two groups of driving signals.
S103, the motor to be tested operates according to the received driving current signal.
Specifically, after the driving current signal is input into the motor to be tested, the running state of the motor to be tested is closer to the driving state in actual running, so that the running parameters of the motor to be tested are closer to the state parameters in actual running, and along with the change of the input direct-axis current signal and quadrature-axis current signal, the running parameters of the motor to be tested in different states in the working range can be obtained.
S104, the motor controller collects operation parameter data of the motor to be detected, and calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be detected under a preset driving current signal according to the operation parameter data.
Specifically, in order to improve the working efficiency of the motor, it is necessary to obtain the operation parameter data of the motor to be tested to calculate the optimal working point of the motor to be tested in the working range. And after the motor controller outputs a driving current signal to the motor to be tested, acquiring operation parameter data of the motor to be tested, and calculating a quadrature axis inductance value and a direct axis inductance value of the motor to be tested under the condition of the current input direct axis current signal and the quadrature axis current signal according to the operation parameter data. The calculated quadrature axis inductance value and the direct axis inductance value are set to be closer to the numerical value of the motor to be measured in actual operation, and a plurality of groups of calculation results can be obtained according to the change of the input driving current signal.
When the parameters of the motor to be tested are verified, the motor to be tested and the motor to be tested are both installed on the rack, the rotation speed of the motor to be tested is maintained and adjusted by setting the motor to be tested, the rotation speed of the motor to be tested is maintained at a preset fixed rotation speed, at least two groups of driving current signals are output to the electrode to be tested through the motor controller, and the motor to be tested operates according to the received driving current signals. The motor controller collects operation parameter data of the motor to be tested under each group of driving current signals, and calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be tested under a preset driving current signal according to the operation parameter data.
According to the motor parameter verification method, the device such as the motor to be tested, the accompanying motor, the rack and the motor controller is arranged, and the quadrature axis inductance value and the direct axis inductance value of the motor to be tested are calculated. The motor parameter verification method provided by the embodiment of the invention realizes measurement of the direct-axis inductance and quadrature-axis inductance data of the motor under different current conditions, so that the inductance parameters of the motor for vector control in the calibration process are more accurate compared with static parameters, the calculated quadrature-axis inductance value and direct-axis inductance value are adopted to calibrate the motor, the parameter requirements of the actual working condition of the motor are met, and the working efficiency of the motor is improved.
Optionally, fig. 2 is a flowchart of another motor parameter verification method according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 2, the motor parameter verification method includes:
s201, a test accompanying motor is connected with a motor to be tested through a rack, and drags the rotating speed of the motor to be tested to a preset fixed rotating speed and maintains the rotating speed at the preset fixed rotating speed.
Specifically, since the rotation speed of the motor to be measured is relatively high, the preset fixed rotation speed cannot be maintained, and the motor to be measured needs to be dragged by the accompanying motor to reduce the speed of the motor to be measured, so that the preset fixed rotation speed is maintained. The arrangement can keep the rotation speed of the motor to be measured consistent all the time, so that the result of inductance calculation is not influenced by rotation speed change, and the motor calibration requirement is met.
S102, outputting at least two groups of driving current signals to the motor to be tested through a motor controller.
S103, the motor to be tested operates according to the received driving current signal.
S104, the motor controller collects operation parameter data of the motor to be detected, and calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be detected under a preset driving current signal according to the operation parameter data.
Optionally, fig. 3 is a flowchart of another motor parameter verification method according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 3, the motor parameter verification method includes:
s101, maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed through the accompanying motor of the rack.
S301, outputting at least two groups of d-axis current signals and q-axis current signals to the motor to be tested through a motor controller.
Specifically, the driving current signal output by the motor controller includes a d-axis current signal and a q-axis current signal, the d-axis current signal is a direct-axis current signal, and the q-axis current signal is a quadrature-axis current signal. The d-axis current signal and the q-axis current signal input to the motor to be measured generate d-axis inductance and q-axis inductance, namely direct-axis inductance and quadrature-axis inductance.
S103, the motor to be tested operates according to the received driving current signal.
S104, the motor controller collects operation parameter data of the motor to be detected, and calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be detected under a preset driving current signal according to the operation parameter data.
Optionally, fig. 4 is a flowchart of another motor parameter verification method according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 4, the motor parameter verification method includes:
s101, maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed through the accompanying motor of the rack.
S401, outputting a d-axis current signal to the motor to be tested through a motor controller.
The d-axis current signal takes 20A as a step value from zero to 400A.
Specifically, a current signal of the motor to be tested can be input according to the parameter setting of the motor to be tested, so that the input d-axis current gradually rises from zero to the maximum current value of the motor to be tested. Illustratively, the current maximum value of the input d-axis may be set to 400A, 450A, 500A, or the like, and the step size value may be set to 10A, 20A, 30A, or the like. Too large a step size can lead to too few acquired data samples, all optimal working points cannot be covered, and too small a step size can lead to too many data samples, so that the working efficiency is affected.
S402, outputting a q-axis current signal to the motor to be tested through a motor controller.
The q-axis current signal starts from zero to 400A, and takes 20A as a step length.
Specifically, a current signal of the motor to be tested can be input according to the parameter setting of the motor to be tested, so that the input q-axis current gradually rises from zero to the maximum current value of the motor to be tested. Illustratively, the current maximum value of the input q-axis may be set to 400A, 450A, 500A, or the like, and the step size value may be set to 10A, 20A, 30A, or the like. The driving current signal is set in this way, the dynamic parameters of the motor in the running state can be accurately obtained, and the optimal working point of the motor is obtained through calculation of multiple groups of parameters so as to adjust the working state of the motor.
S103, the motor to be tested operates according to the received driving current signal.
S104, the motor controller collects operation parameter data of the motor to be detected, and calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be detected under a preset driving current signal according to the operation parameter data.
Optionally, fig. 5 is a flowchart of another motor parameter verification method according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 5, the motor parameter verification method includes:
s101, maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed through the accompanying motor of the rack.
S301, outputting at least two groups of d-axis current signals and q-axis current signals to the motor to be tested through a motor controller.
S501, the motor to be tested operates according to at least two groups of received d-axis current signals and q-axis current signals.
Wherein each set of drive current signals includes a d-axis current signal and a q-axis current signal.
Specifically, a set of driving current signals input into the motor to be tested includes a d-axis current signal and a q-axis current signal, and each time a set of driving current signals is input, the motor controller adjusts the d-axis current signal or the q-axis current signal to change the next set of driving current signals. Illustratively, the d-axis current signal in the first set is 0A and the q-axis signal is 0A; the d-axis current signal in the second group is 0A and the q-axis signal is 20A; the d-axis current signal in the third group is 0A and the q-axis signal is 40A; the d-axis current signal in the N group is 20A, and the q-axis signal is 20A; the d-axis current signal in the n+1 group is 20A and the q-axis signal is 40A. The arrangement can ensure that each group of driving current signals of the motor to be tested can change the running state of the motor, so that the running parameter data of the motor to be tested under more conditions can be obtained.
S104, the motor controller collects operation parameter data of the motor to be detected, and calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be detected under a preset driving current signal according to the operation parameter data.
Optionally, fig. 6 is a flowchart of another motor parameter verification method according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 6, the motor parameter verification method includes:
s101, maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed through the accompanying motor of the rack.
S301, outputting at least two groups of d-axis current signals and q-axis current signals to the motor to be tested through a motor controller.
S103, the motor to be tested operates according to the received driving current signal.
S601, the motor controller collects operation parameter data of the motor to be tested.
Wherein the operating parameter data comprises: voltage data, current data and rotating speed data of the motor to be tested under each group of driving current signals.
Specifically, after the motor controller inputs a group of driving current signals, the collected operation parameter data of the motor to be tested comprise voltage data, current data, rotating speed data and the like of the motor to be tested, and the collected operation parameter data are used for calculating a direct axis inductance value and a quadrature axis inductance value under the current driving current signals.
S602, the motor controller calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be tested under a preset driving current signal based on a vector control voltage equation according to the operation parameter data and the driving current signal.
Specifically, according to the operation parameter data and the driving current signal collected by the motor controller, the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under the preset driving current signal are calculated according to the following formula:
u q ＝R 1 i q + pΨ q +ωΨ d (1)
u d ＝R 1 i d + pΨ d +ωΨ q (2)
wherein u is d For the direct axis voltage u q For quadrature axis voltage, R 1 I is the resistance of the stator winding of the motor to be tested d I is a direct axis current signal q Is an intersecting axis current signal, p is a differential operator, ω is the rotation speed of the motor to be measured, ψ d Is a straight axis flux linkage, ψ q Is a cross axis flux linkage. The quadrature axis inductance value and the direct axis inductance value of each group of driving current signals are calculated through a formula, and the obtained multiple groups of parameters under different running states are used for calculating the optimal working point of the motor so as to adjust the working state of the motor, and can also be used for improving the accuracy of estimated torque so as to improve the safety performance.
Optionally, fig. 7 is a flowchart of another motor parameter verification method according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 7, the motor parameter verification method further includes:
s101, maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed through the accompanying motor of the rack.
S102, outputting at least two groups of driving current signals to the motor to be tested through a motor controller.
S103, the motor to be tested operates according to the received driving current signal.
S104, the motor controller collects operation parameter data of the motor to be detected, and calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be detected under a preset driving current signal according to the operation parameter data.
S701, verifying static motor parameters of the motor to be tested according to the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under the preset driving current, and obtaining verified motor parameters.
Specifically, after the motor controller finishes outputting each set of preset driving current and calculating the quadrature axis inductance value and the direct axis inductance value under each set of preset driving current, a data table of the quadrature axis inductance and the direct axis inductance can be obtained. According to the running state of the motor to be tested in the actual working process, the static motor parameters of the motor to be tested can be verified through the data table, if the static motor parameters accord with the actual running state, the static motor parameters can be directly used for controlling the motor to run, and if the static motor parameters do not accord with the actual running state, the quadrature axis inductance value and the direct axis inductance value which accord with the actual running state in the data table are selected for motor control. The direct axis inductance value and the quadrature axis inductance value can also be used to improve the accuracy of the estimated torque to improve the safety performance.
Optionally, fig. 8 is a flowchart of another motor parameter verification method according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 8, the motor parameter verification method further includes:
s101, maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed through the accompanying motor of the rack.
S102, outputting at least two groups of driving current signals to the motor to be tested through a motor controller.
S103, the motor to be tested operates according to the received driving current signal.
S104, the motor controller collects operation parameter data of the motor to be detected, and calculates a quadrature axis inductance value and a direct axis inductance value of the motor to be detected under a preset driving current signal according to the operation parameter data.
S701, verifying static motor parameters of the motor to be tested according to the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under the preset driving current, and obtaining verified motor parameters.
S801, calculating an optimal working point of the motor to be tested according to the verified motor parameters.
Specifically, through the acquired data table of the direct-axis inductance and the quadrature-axis inductance, the optimal current combination required to be output by the motor controller for realizing the command torque can be calculated, and the optimal current combination is the combination with the minimum current output, namely the optimal working point. All calculated optimal working points in the working range of the motor to be detected can be calculated by adopting a data table of the direct axis inductance and the quadrature axis inductance, and the proper optimal working point can be selected according to the running state of the actual motor.
S802, controlling the motor to be tested to run at the optimal working point.
Specifically, when the motor to be tested operates with the optimal current combination of the optimal working point, the electric energy consumption can be reduced, and the working efficiency can be improved.
In another alternative implementation, fig. 9 is a logic diagram of a method for outputting a driving current signal by a motor controller according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 9, the method for outputting a driving current signal by the motor controller provided in this embodiment includes:
s1, starting.
S2、Id＝0，Iq＝0。
S3, ld and Lq are calculated.
S4、Iq+20。
S5, judging that Iq is less than or equal to 400, if yes, executing S3, and if not, executing S6.
S6、Iq＝0。
S7、Id+20。
S8, judging Id is less than or equal to 400, if yes, executing S3, and if no, executing S9.
S9、Id＝0，Iq＝0。
S10, ending.
Wherein Id is a direct-axis current signal, iq is a quadrature-axis current signal, ld is a direct-axis inductance value, and Lq is a quadrature-axis inductance value.
The method for outputting the driving current signals by the motor controller provided by the embodiment of the invention can output the driving current signals according to the working range of the motor, and can output a plurality of groups of driving current signals to change the running state of the motor and obtain a plurality of groups of direct axis inductance and quadrature axis inductance data. The motor can select proper parameters for adjustment in the calibration process.
Optionally, fig. 10 is a schematic structural diagram of a motor parameter verification system according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 10, the motor parameter verification system provided in the embodiment of the present invention includes:
a rack 10, on which a motor to be tested and a motor to be tested are arranged;
the accompanying motor 40 is configured to maintain the rotation speed of the motor to be tested at a preset fixed rotation speed;
a motor controller 20 for outputting at least two sets of driving current signals to the motor to be tested;
the motor 30 to be tested is configured to operate according to the received driving current signal;
the motor controller 20 is further configured to collect operation parameter data of the motor to be tested, and calculate a quadrature axis inductance value and a direct axis inductance value of the motor to be tested under a preset driving current signal according to the operation parameter data.
Optionally, the motor controller 20 is specifically configured to output at least two sets of d-axis current signals and q-axis current signals to the motor to be tested.
Optionally, the motor to be tested 30 is specifically configured to operate according to the received at least two sets of d-axis current signals and q-axis current signals.
Optionally, the motor controller 20 is further configured to calculate a quadrature axis inductance value and a direct axis inductance value of the motor to be measured under a preset driving current signal based on a voltage equation of vector control according to the operation parameter data and the driving current signal.
Optionally, the motor controller 20 is further configured to verify the static motor parameter of the motor to be tested according to the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under the preset driving current, so as to obtain the verified motor parameter.
Optionally, the motor controller 20 is further configured to calculate an optimal operating point of the motor to be tested and control the motor to be tested to operate at the optimal operating point.
The motor parameter verification system provided by the embodiment of the invention comprises a bench, a motor to be tested, a motor to be accompanied by test and a motor controller. The motor to be measured and the accompanying motor are arranged on the rack, and the rotating speed of the motor to be measured is maintained at a preset fixed rotating speed through the accompanying motor. The motor controller outputs at least two groups of d-axis current signals and q-axis current signals to the motor to be tested, acquires parameter data of the motor to be tested operated according to the output current signals, and calculates quadrature axis inductance values and direct axis inductance values of the motor to be tested under the d-axis current signals and the q-axis current signals based on a voltage equation of vector control according to the operation parameter data and the current signals.
After the motor controller finishes outputting each group of preset driving current and calculating the quadrature axis inductance value and the direct axis inductance value under each group of preset driving current, a data table of the quadrature axis inductance and the direct axis inductance can be obtained. According to the running state of the motor to be tested in the actual working process, the static motor parameters of the motor to be tested can be verified through the data table, if the static motor parameters do not accord with the actual running state, the optimal current combination which is required to be output by the motor controller to realize the command torque, namely the optimal working point, is calculated, and the motor to be tested is controlled to run at the optimal working point. The direct-axis inductance and quadrature-axis inductance data of the motor under different current conditions are measured, the accuracy of inductance measurement is improved, the calibration of the motor is more accurate, the motor can be controlled to operate at an optimal working point according to a data table of the quadrature-axis inductance and the direct-axis inductance, and the accuracy of torque estimation is improved.
Alternatively, fig. 11 is a schematic structural diagram of a new energy vehicle according to an embodiment of the present invention. On the basis of the foregoing embodiments, referring to fig. 11, the new energy vehicle 100 provided in the embodiment of the present invention includes a motor 30 to be tested for calibrating the quadrature axis inductance value and the direct axis inductance value obtained by sampling the motor parameter verification method in any embodiment, which has the beneficial effects of the motor parameter verification method in any embodiment described above and is not described herein again. The motor 30 to be tested comprises a permanent magnet synchronous motor.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (10)

1. The motor parameter verification method is characterized by being applied to a motor test system; the method comprises the following steps:
maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed through the accompanying motor of the rack;
outputting at least two groups of driving current signals to the motor to be tested through a motor controller;
the motor to be tested operates according to the received driving current signal;
and the motor controller collects the operation parameter data of the motor to be tested, and calculates the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under a preset driving current signal according to the operation parameter data.
2. The method of claim 1, wherein the maintaining the rotational speed of the motor under test at the predetermined fixed rotational speed by the accompanying motor of the gantry comprises:
the accompanying motor is connected with the motor to be tested through the rack, and drags the rotating speed of the motor to be tested to a preset fixed rotating speed and maintains the rotating speed at the preset fixed rotating speed.
3. The method of claim 1, wherein outputting, by the motor controller, at least two sets of drive current signals to the motor under test, comprises:
and outputting at least two groups of d-axis current signals and q-axis current signals to the motor to be tested through a motor controller.
4. A method according to claim 3, wherein said outputting, by the motor controller, at least two sets of d-axis current signals and q-axis current signals to the motor under test comprises:
outputting a d-axis current signal to the motor to be tested through a motor controller, wherein the d-axis current signal takes 20A as a step length value from zero to 400A;
and outputting a q-axis current signal to the motor to be tested through a motor controller, wherein the q-axis current signal takes 20A as a step length from zero to 400A.
5. A method according to claim 3, wherein the motor to be tested operates on the received current signal, comprising:
the motor to be tested operates according to the received at least two groups of d-axis current signals and q-axis current signals;
wherein each set of said drive current signals includes one said d-axis current signal and one said q-axis current signal.
6. A method according to claim 3, wherein the motor controller collects the operation parameter data of the motor to be measured, and calculates the quadrature axis inductance value and the direct axis inductance value of the motor to be measured under a preset driving current signal according to the operation parameter data, including:
the motor controller collects operation parameter data of the motor to be tested; wherein the operating parameter data comprises: voltage data, current data and rotating speed data of the motor to be tested under each group of driving current signals;
and the motor controller calculates the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under a preset driving current signal based on a vector control voltage equation according to the operation parameter data and the driving current signal.
7. The method of claim 1, further comprising, after the motor controller collects the operation parameter data of the motor to be measured and calculates the quadrature axis inductance value and the direct axis inductance value of the motor to be measured under a preset driving current signal according to the operation parameter data:
and verifying the static motor parameters of the motor to be tested according to the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under the preset driving current to obtain verified motor parameters.
8. The method of claim 7, wherein verifying the static motor parameters of the motor under test according to the quadrature axis inductance value and the direct axis inductance value of the motor under test at a preset driving current, after obtaining the verified motor parameters, further comprises:
calculating an optimal working point of the motor to be tested according to the verified motor parameters;
and controlling the motor to be tested to run at the optimal working point.
9. A motor parameter verification system, comprising:
the rack is provided with a motor to be tested and a motor to be tested;
the accompanying motor is used for maintaining the rotating speed of the motor to be tested at a preset fixed rotating speed;
the motor controller is used for outputting at least two groups of driving current signals to the motor to be tested;
the motor to be tested is used for running according to the received driving current signal;
and the motor controller is also used for collecting the operation parameter data of the motor to be tested and calculating the quadrature axis inductance value and the direct axis inductance value of the motor to be tested under a preset driving current signal according to the operation parameter data.
10. A new energy vehicle, characterized by comprising: a motor to be measured comprising calibration of a quadrature axis inductance value and a direct axis inductance value obtained by sampling the motor parameter verification method according to any one of claims 1 to 8.
CN202310485567.1A 2023-04-28 2023-04-28 Motor parameter verification method and system and vehicle Pending CN116559654A (en)

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Application Number Priority Date Filing Date Title
CN202310485567.1A CN116559654A (en) 2023-04-28 2023-04-28 Motor parameter verification method and system and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310485567.1A CN116559654A (en) 2023-04-28 2023-04-28 Motor parameter verification method and system and vehicle

Publications (1)

Publication Number Publication Date
CN116559654A true CN116559654A (en) 2023-08-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310485567.1A Pending CN116559654A (en) 2023-04-28 2023-04-28 Motor parameter verification method and system and vehicle

Country Status (1)

Country Link
CN (1) CN116559654A (en)

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