CN114838855A - Dynamometer device and system for motor drag test - Google Patents
Dynamometer device and system for motor drag test Download PDFInfo
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- CN114838855A CN114838855A CN202210505679.4A CN202210505679A CN114838855A CN 114838855 A CN114838855 A CN 114838855A CN 202210505679 A CN202210505679 A CN 202210505679A CN 114838855 A CN114838855 A CN 114838855A
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- 238000012360 testing method Methods 0.000 title claims abstract description 93
- 230000001360 synchronised effect Effects 0.000 claims abstract description 76
- 238000013178 mathematical model Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000011056 performance test Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
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- 238000002474 experimental method Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
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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
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
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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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The application provides a dynamometer device and system of motor to dragging test, and the device includes: the device comprises a permanent magnet synchronous controller, a four-quadrant loading frequency converter and a loading motor; the controller and the frequency converter are both connected with a bus; the loading motor is fixed on the test platform, is connected with the four-quadrant loading frequency converter and is provided with an encoder; the encoder is connected to the controller and the frequency converter through an encoder line; the non-self-starting permanent magnet synchronous motor is characterized in that a tested motor and a loading motor are coaxially arranged and fixed on a test platform; the tested motor is also connected with the controller; the encoder is used for feeding back the position information of the rotating shaft to the controller and the frequency converter; the frequency converter is used for feeding back the energy of the loading motor to the bus according to the position information of the rotating shaft; the controller is used for controlling the tested motor to start and test according to the position information of the rotating shaft. This application can reduce testing personnel's work load, avoids taking place the circuit and connects the wrong condition that causes controller or encoder to burn out to and because the interface is not hard up when experimental causes the experimental failure condition.
Description
Technical Field
The application relates to the technical field of motors, in particular to a dynamometer device and system for a motor drag test.
Background
The non-self-starting permanent magnet motor is usually started in a closed-loop control manner, an alternating current feedback manner is usually adopted for testing the non-self-starting permanent magnet motor, for example, a tested motor and a loading motor are coaxially mounted and fixed on a test platform, a coder (PG) mounted on the tested motor is connected to a coder feedback unit of a permanent magnet synchronous controller through a coder wire, and load energy is fed back to an alternating current feedback bus by the loading motor (usually a variable frequency speed regulation motor) through a four-quadrant loading frequency converter.
Because the tested motor is a test sample and needs to be replaced frequently, the encoder wire installed on the tested motor needs to be plugged and unplugged repeatedly every time, and the mode often has the following two defects:
(1) due to repeated plugging and unplugging, the workload of testers is increased, and meanwhile, the situation that a coder on a permanent magnet synchronous controller or a tested motor is burnt out due to wrong wiring is also often caused;
(2) because repeated plugging easily leads to encoder line not hard up, often appear when leading to the experiment because the interface is not hard up causes the experimental failure condition.
Disclosure of Invention
The application aims to provide a dynamometer device and a system for a motor drag test, which can reduce the workload of testers, avoid the situation that a wrong wire connection causes a permanent magnet synchronous controller or an encoder on a tested motor to burn out, and cause the test failure situation due to interface looseness during the test.
In a first aspect, an embodiment of the present application provides a dynamometer device for a motor drag test, where the dynamometer device includes: the device comprises a permanent magnet synchronous controller, a four-quadrant loading frequency converter and a loading motor; the permanent magnet synchronous controller and the four-quadrant loading frequency converter are both connected with an alternating current feedback bus; the loading motor is fixed on the test platform, is connected with the four-quadrant loading frequency converter and is provided with an encoder; the encoder is connected with the permanent magnet synchronous controller and the four-quadrant loading frequency converter through an encoder wire; the tested motor and the loading motor are coaxially arranged and fixed on the test platform; the tested motor is also connected with a permanent magnet synchronous controller; the tested motor is a non-self-starting permanent magnet synchronous motor; the encoder is used for collecting the position information of the rotating shaft of the loading motor and feeding the position information of the rotating shaft back to the permanent magnet synchronous controller and the four-quadrant loading frequency converter; the four-quadrant loading frequency converter is used for feeding back the energy of the loading motor to the alternating current feedback bus according to the position information of the rotating shaft; the permanent magnet synchronous controller is used for controlling the tested motor to be started and tested according to the position information of the rotating shaft.
Furthermore, the encoder is connected with the input end of the deconcentrator; two output ends of the deconcentrator are respectively connected with the permanent magnet synchronous controller and the four-quadrant loading frequency converter.
Furthermore, the loading motor is provided with two encoders; one encoder is connected with the permanent magnet synchronous controller; the other encoder is connected with a four-quadrant loading frequency converter.
Further, the above apparatus further comprises: a torque and rotation speed sensor; the tested motor and the loading motor are both connected with a torque and rotating speed sensor; the torque and rotation speed sensor is used for testing the torque and rotation speed output by the tested motor and/or the loading motor.
Further, the permanent magnet synchronous controller converts the coupling variable of the loading motor into a mathematical model under a dq coordinate system after coordinate transformation according to the position information of the rotating shaft, and realizes the control of the tested motor based on the mathematical model.
Further, the mathematical model includes a voltage equation and a flux linkage equation.
Further, the loading motor is a variable frequency speed regulating motor.
Further, the testing includes: and (5) testing the steady-state performance of the motor.
Further, the steady state performance test comprises at least one of: the method comprises the following steps of load performance testing, efficiency testing, temperature rise testing and step-out torque testing.
In a second aspect, an embodiment of the present application further provides a dynamometer system for a motor drag test, where the system includes: a motor under test and a dynamometer device for a motor drag test according to the first aspect; the device comprises: the device comprises a permanent magnet synchronous controller, a four-quadrant loading frequency converter and a loading motor; the permanent magnet synchronous controller and the four-quadrant loading frequency converter are both connected with an alternating current feedback bus; the loading motor is fixed on the test platform, is connected with the four-quadrant loading frequency converter and is provided with an encoder; the encoder is connected with the permanent magnet synchronous controller and the four-quadrant loading frequency converter through an encoder wire; the tested motor and the loading motor are coaxially arranged and fixed on the test platform; the tested motor is also connected with a permanent magnet synchronous controller; the encoder is used for collecting the position information of the rotating shaft of the loading motor and feeding the position information of the rotating shaft back to the permanent magnet synchronous controller and the four-quadrant loading frequency converter; the four-quadrant loading frequency converter is used for feeding back the energy of the loading motor to the alternating current feedback bus according to the position information of the rotating shaft; the permanent magnet synchronous controller is used for controlling the tested motor to be started and tested according to the position information of the rotating shaft.
In the dynamometer device and system for motor drag test provided by the embodiment of the application, the device comprises: the device comprises a permanent magnet synchronous controller, a four-quadrant loading frequency converter and a loading motor; the permanent magnet synchronous controller and the four-quadrant loading frequency converter are both connected with an alternating current feedback bus; the loading motor is fixed on the test platform and is provided with an encoder; the encoder is connected with the permanent magnet synchronous controller and the four-quadrant loading frequency converter through an encoder wire; the tested motor and the loading motor are coaxially arranged and fixed on the test platform; the tested motor is also connected with a permanent magnet synchronous controller; the tested motor is a non-self-starting permanent magnet synchronous motor; the encoder is used for collecting the position information of the rotating shaft of the loading motor and feeding the position information of the rotating shaft back to the permanent magnet synchronous controller and the four-quadrant loading frequency converter; the four-quadrant loading frequency converter is used for feeding back the energy of the loading motor to the alternating current feedback bus according to the position information of the rotating shaft; and the permanent magnet synchronous controller is used for controlling the tested motor to start and test according to the position information of the rotating shaft. In the embodiment of the application, through installing the encoder on the loading motor, and be connected with permanent magnet synchronous controller and four-quadrant loading converter respectively, can realize being tried the normal closed loop start of motor on the one hand, follow-up test improves the measuring accuracy, when on the other hand makes being tried the motor and changes, need not carry out inserting of the coding line of encoder and dial, thereby reduce experimenter's work load, avoid taking place the line and connect the wrong condition that causes permanent magnet synchronous controller or is tried the encoder on the motor and burn out, and because the interface is not hard up when experimental causes experimental failure condition.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a conventional dynamometer apparatus for a non-self-starting permanent magnet motor drag test;
FIG. 2 is a block diagram of a dynamometer apparatus for a motor-to-drag test according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a dynamometer apparatus for a motor-to-drag test according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a voltage equation provided in an embodiment of the present application;
FIG. 5 is a schematic diagram of a flux linkage equation provided in an embodiment of the present application;
fig. 6 is a block diagram of a dynamometer system for a motor drag test according to an embodiment of the present disclosure.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present application. 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 application.
Referring to fig. 1, a conventional dynamometer apparatus for a non-self-starting pm motor drag test includes: the loading motor, the permanent magnet synchronous controller and the four-quadrant loading frequency converter are arranged; the permanent magnet synchronous controller and the four-quadrant loading frequency converter are both connected to the alternating current feedback bus; the permanent magnet synchronous controller is also connected with a tested motor (namely a non-self-starting permanent magnet motor) and an encoder, and the encoder is arranged on the tested motor; the tested motor and the loading motor are coaxially arranged and fixed on the test platform; the loading motor is also connected with a four-quadrant loading frequency converter. When the test is carried out, the non-self-starting permanent magnet motor is started in a closed-loop control mode, and then a series of tests are carried out. For example, a coder (PG) installed on a tested motor is connected to a coder feedback unit of a permanent magnet synchronous controller through a coder wire, and load energy is fed back to an alternating current feedback bus through a four-quadrant loading frequency converter by a loading motor (a variable frequency speed regulating motor is often adopted), so that closed-loop control is realized.
Because the tested motor is a test sample and needs to be replaced frequently, the encoder wire installed on the tested motor needs to be plugged and unplugged repeatedly every time, and the mode often causes the following conditions: (1) due to repeated plugging and unplugging, the workload of testers is increased, and meanwhile, the situation that a coder on a permanent magnet synchronous controller or a tested motor is burnt out due to wrong wire connection often occurs; (2) because repeated plugging easily leads to encoder line not hard up, often appear when leading to the experiment because the interface is not hard up causes the experimental failure condition.
Based on this, this application embodiment provides a motor is to experimental dynamometer machine device and system that drags, through installing the encoder on the loading motor, and be connected with permanent magnet synchronous controller and four-quadrant loading converter respectively, can realize the normal closed loop start of being tried the motor on the one hand, follow-up test and improvement test precision, when on the other hand makes being tried the motor and changes, need not carry out inserting of the coding line of encoder and dial, thereby reduce testing personnel's work load, avoid taking place the line and connect the wrong condition that causes permanent magnet synchronous controller or is burnt out by the encoder on the motor of being tried, and because the interface is not hard up when experimental failure condition that causes.
For the convenience of understanding the present embodiment, a dynamometer apparatus for a motor-to-drag test disclosed in the embodiments of the present application will be described in detail first.
Fig. 2 is a dynamometer device for a motor-to-drag test provided in an embodiment of the present application, where the dynamometer device includes: the device comprises a permanent magnet synchronous controller, a four-quadrant loading frequency converter and a loading motor; the permanent magnet synchronous controller and the four-quadrant loading frequency converter are both connected with an alternating current feedback bus; the loading motor is fixed on the test platform, is connected with the four-quadrant loading frequency converter and is provided with an encoder; the encoder is connected with the permanent magnet synchronous controller and the four-quadrant loading frequency converter through an encoder wire; the tested motor and the loading motor are coaxially arranged and fixed on the test platform; the tested motor is also connected with a permanent magnet synchronous controller; the tested motor is a non-self-starting permanent magnet synchronous motor; the encoder is used for collecting the position information of the rotating shaft of the loading motor and feeding the position information of the rotating shaft back to the permanent magnet synchronous controller and the four-quadrant loading frequency converter; the four-quadrant loading frequency converter is used for feeding back the energy of the loading motor to the alternating current feedback bus according to the position information of the rotating shaft; the permanent magnet synchronous controller is used for controlling the tested motor to be started and tested according to the position information of the rotating shaft.
The test process comprises the following steps: (1) respectively adopting a permanent magnet synchronous controller and a four-quadrant loading frequency converter to start the tested motors for parallel operation; (2) controlling a loading motor (variable frequency speed regulating motor) to load a tested motor (non-self-starting permanent magnet synchronous) in a frequency reduction mode of a four-quadrant loading frequency converter; (3) and carrying out the test after loading to a set state.
In the test process, a tested motor (non-self-starting permanent magnet synchronous) is in an electric state (power is removed from an alternating current feedback bus power grid), a loading motor (variable frequency speed regulating motor) is in a power generation state, and the energy of the loading motor can be fed back to the power grid by adopting a four-quadrant frequency converter, so that the energy is recycled in a closed loop.
In the embodiment of the application, the four-quadrant loading frequency converter can receive the rotating shaft position information collected by the encoder at the same time, the loading motor is controlled based on the information, the control precision can be improved through rotating speed closed-loop control, 0.01% can be achieved, the encoder installed on the tested motor in the prior art only sends the collected rotating shaft position information to the permanent magnet synchronous controller, and the control precision can only reach 0.5% by adopting open-loop control.
The embodiment of the application provides a dynamometer device of motor drag test, through installing the encoder on the loading motor, and be connected with permanent magnet synchronous controller and four-quadrant loading converter respectively, can realize the normal closed loop start of being tried the motor on the one hand, follow-up test and improvement test accuracy, on the other hand makes when being tried the motor and changing, need not carry out inserting of the coding line of encoder and dial, thereby reduce experimenter's work load, avoid the line to connect the wrong condition that causes permanent magnet synchronous controller or is burnt out by the encoder on the motor, and because the interface is not hard up when experimental failure condition that causes.
The embodiment of the application also provides another dynamometer device for a motor pair drag test, the dynamometer device is realized on the basis of the previous embodiment, and the connection mode of the encoder is described in the column.
The installation of the above-mentioned encoder can be realized by two ways:
the first method comprises the following steps: the encoder is connected with the input end of the deconcentrator; two output ends of the deconcentrator are respectively connected with the permanent magnet synchronous controller and the four-quadrant loading frequency converter, as shown in fig. 3. The signal of the encoder can be simultaneously sent to the permanent magnet synchronous controller and the four-quadrant loading frequency converter in a deconcentrator mode, and cost is low.
And the second method comprises the following steps: the loading motor is provided with two encoders; one encoder is connected with the permanent magnet synchronous controller; the other encoder is connected with a four-quadrant loading frequency converter.
As shown in fig. 3, the above apparatus further includes: a torque and speed sensor (shown as T-N); the tested motor and the loading motor are both connected with a torque and rotating speed sensor; the torque and rotation speed sensor is used for testing the torque and rotation speed output by the tested motor and/or the loading motor and can provide data reference in the testing process.
The specific control process is as follows: the permanent magnet synchronous controller converts the coupling variable of the loading motor into a mathematical model under a dq coordinate system after coordinate transformation according to the position information of the rotating shaft, and realizes the control of the tested motor based on the mathematical model.
The mathematical model includes a voltage equation (as shown in fig. 4) and a flux linkage equation (as shown in fig. 5).
The loading motor is a variable-frequency speed-regulating motor. The test in the embodiment of the present application may include: the steady-state performance test of the motor specifically comprises one of the following steps: the method comprises the following steps of load performance testing, efficiency testing, temperature rise testing and step-out torque testing.
The advantage of this application embodiment through installing the mode on the loading motor with the encoder is obvious, only needs once to install and debug the back can be fixed motionless, need not to carry out the plug of encoder line repeatedly to the defect of traditional experimental mode has been avoided.
Based on the above device embodiment, the present application embodiment further provides a dynamometer system for motor-to-drag test, as shown in fig. 6, the system includes: a tested motor and a dynamometer device for a motor pair drag test in the embodiment; the device comprises: the device comprises a permanent magnet synchronous controller, a four-quadrant loading frequency converter and a loading motor; the permanent magnet synchronous controller and the four-quadrant loading frequency converter are both connected with an alternating current feedback bus; the loading motor is fixed on the test platform, is connected with the four-quadrant loading frequency converter and is provided with an encoder; the encoder is connected with the permanent magnet synchronous controller and the four-quadrant loading frequency converter through an encoder wire; the tested motor and the loading motor are coaxially arranged and fixed on the test platform; the tested motor is also connected with a permanent magnet synchronous controller; the encoder is used for collecting the position information of the rotating shaft of the loading motor and feeding the position information of the rotating shaft back to the permanent magnet synchronous controller and the four-quadrant loading frequency converter; the four-quadrant loading frequency converter is used for feeding back the energy of the loading motor to the alternating current feedback bus according to the position information of the rotating shaft; the permanent magnet synchronous controller is used for controlling the tested motor to be started and tested according to the position information of the rotating shaft.
The system provided by the embodiment of the present application has the same implementation principle and the same technical effect as those of the foregoing device embodiment, and for the sake of brief description, no mention is made in the embodiment of the system, and reference may be made to the corresponding contents in the foregoing device embodiment.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present application and are intended to be covered by the appended claims. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A dynamometer apparatus for motor-to-drag testing, the apparatus comprising: the device comprises a permanent magnet synchronous controller, a four-quadrant loading frequency converter and a loading motor; the permanent magnet synchronous controller and the four-quadrant loading frequency converter are both connected with an alternating current feedback bus; the loading motor is fixed on the test platform, is connected with the four-quadrant loading frequency converter and is provided with an encoder; the encoder is connected to the permanent magnet synchronous controller and the four-quadrant loading frequency converter through an encoder wire; the tested motor and the loading motor are coaxially arranged and fixed on the test platform; the tested motor is also connected with the permanent magnet synchronous controller; the tested motor is a non-self-starting permanent magnet synchronous motor;
the encoder is used for acquiring the position information of the rotating shaft of the loading motor and feeding the position information of the rotating shaft back to the permanent magnet synchronous controller and the four-quadrant loading frequency converter; the four-quadrant loading frequency converter is used for feeding back the energy of the loading motor to the alternating current feedback bus according to the position information of the rotating shaft; and the permanent magnet synchronous controller is used for controlling the tested motor to start and test according to the rotating shaft position information.
2. The dynamometer device for motor couple test of claim 1, wherein the encoder is connected to an input of a splitter; and two output ends of the deconcentrator are respectively connected with the permanent magnet synchronous controller and the four-quadrant loading frequency converter.
3. The dynamometer device for motor-drag test according to claim 1, wherein the loading motor is provided with two of the encoders; one encoder is connected with the permanent magnet synchronous controller; and the other encoder is connected with the four-quadrant loading frequency converter.
4. The dynamometer device for motor-to-drag testing of claim 1, the device further comprising: a torque and rotation speed sensor;
the tested motor and the loading motor are both connected with the torque and rotation speed sensor;
the torque and rotation speed sensor is used for testing the torque and rotation speed output by the tested motor and/or the loading motor.
5. The dynamometer device for motor couple test of claim 1, wherein the permanent magnet synchronous controller transforms the coupling variable of the loading motor into a mathematical model under dq coordinate system after coordinate transformation according to the rotation shaft position information, and realizes control of the tested motor based on the mathematical model.
6. The dynamometer device of motor pair drag testing of claim 5, wherein the mathematical model includes a voltage equation and a flux linkage equation.
7. The dynamometer device for motor couple test of claim 1, wherein the loading motor is a variable frequency adjustable speed motor.
8. The dynamometer device of a motor-to-drag test of claim 1, the test comprising: and (5) testing the steady-state performance of the motor.
9. The dynamometer device of the motor-pair-drag test of claim 8, wherein the steady-state performance test includes at least one of: the method comprises the following steps of load performance testing, efficiency testing, temperature rise testing and step-out torque testing.
10. A dynamometer system for motor-to-drag testing, the system comprising: a dynamometric device for a test motor and a motor couple test according to any of claims 1-9; the device comprises: the device comprises a permanent magnet synchronous controller, a four-quadrant loading frequency converter and a loading motor; the permanent magnet synchronous controller and the four-quadrant loading frequency converter are both connected with an alternating current feedback bus; the loading motor is fixed on the test platform, is connected with the four-quadrant loading frequency converter and is provided with an encoder; the encoder is connected with the permanent magnet synchronous controller and the four-quadrant loading frequency converter through an encoder wire; the tested motor and the loading motor are coaxially mounted and fixed on the test platform; the tested motor is also connected with the permanent magnet synchronous controller;
the encoder is used for acquiring the position information of the rotating shaft of the loading motor and feeding the position information of the rotating shaft back to the permanent magnet synchronous controller and the four-quadrant loading frequency converter; the four-quadrant loading frequency converter is used for feeding back the energy of the loading motor to the alternating current feedback bus according to the position information of the rotating shaft; and the permanent magnet synchronous controller is used for controlling the tested motor to start and test according to the rotating shaft position information.
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| CN202210505679.4A CN114838855B (en) | 2022-05-10 | 2022-05-10 | Dynamometer device and system for motor opposite-dragging test |
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| CN202210505679.4A CN114838855B (en) | 2022-05-10 | 2022-05-10 | Dynamometer device and system for motor opposite-dragging test |
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| CN114838855B CN114838855B (en) | 2024-03-01 |
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