CN110926816A - Durable power load torque testing equipment and method for automobile EPS motor - Google Patents
Durable power load torque testing equipment and method for automobile EPS motor Download PDFInfo
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- CN110926816A CN110926816A CN201911290690.8A CN201911290690A CN110926816A CN 110926816 A CN110926816 A CN 110926816A CN 201911290690 A CN201911290690 A CN 201911290690A CN 110926816 A CN110926816 A CN 110926816A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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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
Abstract
The invention discloses a durable power load torque testing device and a method of an automobile EPS motor, wherein the device comprises: the industrial personal computer controls the driving module and the EPS motor controller module to act, and controls the environment box to generate corresponding environment temperature and humidity; the driving module receives the instruction of the industrial personal computer and rotates at a rotating speed specified by the instruction; the measurement module transmits the mechanical rotation of the driving module to the EPS motor module to be measured so as to complete the measurement of torque and bus and phase line currents and store the torque and the bus and phase line currents to the industrial personal computer; the EPS motor module to be tested is arranged in the environment box and rotates with a load under the drive of the mechanical rotation of the driving module transmitted by the measuring module according to the control of the industrial personal computer so as to generate corresponding torque; the EPS motor controller module outputs specified current to the EPS motor module to be tested according to the control of the industrial personal computer, so that the torque control of the EPS motor is realized, and the servo motor loads a load in a rotating speed mode to realize the dragging.
Description
Technical Field
The invention relates to the technical field of torque testing, in particular to 3-station endurance power load torque testing equipment and a method for an automobile EPS (Electric power steering) motor.
Background
The traditional torque test method for the EPS motor of the automobile generally adopts an external motor driving mode, namely a servo motor and a motor to be tested rotate simultaneously, the servo motor and the motor to be tested are in a dragging mode, the servo motor is active, the motor to be tested is passive and used for generating corresponding torque, a torque sensor is used for collecting torque waveforms, most of the torque waveforms are only quantitative torque measurement at a rotating speed and normal temperature, the test flow is shown in figure 1, and when the equipment is started, correction operation is started; if the self-checking is abnormal, the equipment is adjusted until the self-checking is normal, if the self-checking is normal, the load test is carried out, the traditional torque test mode can only carry out fixed-speed and fixed-torque test on the motor to be tested, the mode is single, more dimensionality analysis can not be carried out on the torque of the motor, and the problem that the motor is poor in positioning can not be effectively solved due to the fact that frequency domain analysis is not carried out.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide durable power load torque testing equipment and a durable power load torque testing method for an automobile EPS motor.
To achieve the above object, the present invention provides an endurance power load torque testing apparatus of an EPS motor of an automobile, comprising:
the industrial personal computer is used for controlling the driving module and the EPS motor controller module to act, controlling an environment box in which the EPS motor module to be tested is placed so as to generate corresponding environment temperature and humidity, and receiving data output by the measuring module for analysis and display;
the driving module is used for receiving the instruction of the industrial personal computer and rotating at a rotating speed specified by the instruction;
the measurement module is used for transmitting the mechanical rotation of the driving module to the EPS motor module to be measured so as to complete the measurement of torque and bus and phase line currents and store data to the industrial personal computer;
the EPS motor module to be tested is arranged in the environment box and used for carrying out rotation under the drive of the mechanical rotation of the driving module transmitted by the measuring module according to the control of the industrial personal computer so as to generate corresponding torque;
and the EPS motor controller module is used for outputting specified current to the EPS motor module according to the control of the industrial personal computer so as to realize the torque control of the EPS motor.
Preferably, the drive module includes servo drive and servo motor, servo drive connects the delivery outlet of industrial computer, servo drive's output is connected to servo motor's input, servo motor's rotation axis is connected the measurement module, servo motor carries out the loading with the form of rotational speed, realizes dragging.
Preferably, the measuring module comprises a first coupler, a second coupler and a torque sensor, a rotating shaft of the servo motor is connected to the torque sensor through the first coupler, the torque sensor is connected to a rotating shaft of the EPS motor to be measured through the second coupler, and the output of the torque sensor is connected to the input port of the industrial personal computer.
Preferably, another output port of the industrial personal computer is connected to the input end of the EPS motor controller module, and the output end of the EPS motor controller module is connected to the input end of the EPS motor module to be tested.
Preferably, the environment box is used for placing the EPS motor to be tested and generating fixed environment temperature and humidity under the control of the industrial personal computer so as to be used for testing.
Preferably, three to-be-tested EPS motors are arranged in the environment box, and the driving module, the measuring module and the EPS motor controller module correspondingly comprise three corresponding devices.
In order to achieve the above object, the present invention further provides a durable power load torque testing method for an EPS motor of an automobile, comprising the following steps:
step S1, when the self-checking is normal, fixing the EPS motor to be tested in an environment box;
and step S2, setting the rotating speed of the servo motor and the temperature and humidity of the environment box to perform torque test, and testing the torques of the EPS motor to be tested at different rotating speeds, different loads and different temperatures to realize multidimensional analysis of the idling torque function of the motor.
Preferably, in step S1, the three EPS motors to be tested are respectively fixed at corresponding positions in the environmental chamber.
Preferably, in step S2, the torque test is divided into 4 modes: in the first mode, the EPS motor to be tested is tested at a constant temperature, a constant rotating speed and a constant load; the second mode, the third mode and the fourth mode are all traversal tests, and the steps of the second mode, the third mode and the fourth mode are similar.
Preferably, the traversal test of the modes two, three and four comprises the following steps:
step 2.1, setting the temperature, the humidity and the test time of the environmental box, the heat preservation time, the dragging time, the rotating speed of a servo motor and the load size;
step 2.2, keeping the temperature for a plurality of hours according to the specification after the temperature is reached;
step 2.3, starting a system model torque test;
and 2.4, judging whether traversal is finished, if the traversal is finished, finishing the test, and if the traversal is not finished, skipping to the step 2.1 to modify parameters to enter the next round of test, wherein the modified parameters comprise environment box temperature and humidity, test time, heat preservation time, dragging time, servo motor rotating speed and load size.
Compared with the prior art, the durable power load torque testing equipment and the durable power load torque testing method for the automobile EPS motor have the advantages that the servo motor is adopted as the driving motor, the driving motor is controlled to drive the EPS motor to be tested to rotate in a passive loading mode, the torque sensor is used for collecting the axial torque of the motor, the rotating speed of the servo motor and the temperature of the environment box are set to test the torque of the EPS motor under different rotating speeds, different loads and different temperatures, and the multi-dimensional analysis of the idling torque function of the motor is achieved.
Drawings
FIG. 1 is a flow chart of a torque test of a conventional EPS motor of an automobile;
FIG. 2 is a system diagram of an endurance power load torque testing apparatus of an automotive EPS motor of the present invention;
FIG. 3 is a flowchart illustrating steps of a durable power load torque testing method for an EPS motor of an automobile according to the present invention;
FIG. 4 is a schematic diagram illustrating the definition of a mode three duty cycle in an embodiment of the present invention;
FIG. 5 is a flow chart of a method for testing endurance power load torque of an automotive EPS motor in accordance with an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating the T-N curve definition for mode four operation in accordance with an embodiment of the present invention.
Detailed Description
Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the present disclosure by describing the embodiments of the present invention with specific embodiments thereof in conjunction with the accompanying drawings. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
Fig. 2 is a system configuration diagram of an endurance power load torque testing apparatus of an automotive EPS motor according to the present invention. As shown in fig. 2, the durable power load torque test apparatus of an EPS motor of an automobile of the present invention includes: the device comprises an industrial Personal Computer (PC)10, a driving module 20, a measuring module 30, an EPS motor module to be measured 40 and an EPS motor controller module 50.
The industrial Personal Computer (PC)10 is composed of a display screen, a keyboard and test software, and is used for controlling the drive module 20 and the EPS motor controller module 50 to act, controlling an environment box in which the EPS motor module 40 to be tested is placed to generate corresponding environmental temperature, humidity and the like for testing, receiving data output by the measurement module 30, analyzing and displaying the data; the driving module 20 consists of a Servo driver (serv Amp) and a Servo motor and is used for receiving an instruction of the industrial Personal Computer (PC)10 and rotating at a rotating speed specified by the instruction; the measurement module 30 consists of a first coupling/coupling and a torque sensor, and is used for transmitting the mechanical rotation of the driving module 20 to the EPS motor module 40 to be measured to complete the measurement of torque and bus and phase line currents and storing data to an industrial Personal Computer (PC) 10; the EPS motor module to be tested 40 is arranged in the environment box and used for carrying and rotating under the drive of the mechanical rotation of the driving module 20 transmitted by the measuring module 30 according to the control of the industrial Personal Computer (PC)10 so as to generate corresponding torque, and the environment box is used for placing the EPS motor to be tested and generating fixed environment temperature, humidity and the like for testing under the control of the industrial Personal Computer (PC) 10; and the EPS motor controller (inverter) module 50 is used for outputting specified current to the EPS motor module 40 to be tested according to the control of an industrial Personal Computer (PC)10 to realize the torque control of the EPS motor, and meanwhile, the servo motor of the driving module loads a load in a rotating speed mode to realize the dragging.
In the embodiment of the present invention, the 3-station torque testing apparatus for an automotive EPS motor of the present invention can implement a 3-station test, that is, it is used to test three EPS motors to be tested simultaneously (it should be noted that, as long as the environmental chamber is large enough, the number of the motors to be tested is not limited), each module has three corresponding apparatuses, that is, the driving module 20 has three Servo drives (Servo amps) and Servo motors, the measuring module 30 has three circuits composed of a first/second coupling and a torque sensor, the environmental chamber is provided with three EPS motors to be tested, and the EPS motor controller module 50 has three EPS motor controllers, specifically, three output ports of the industrial Personal Computer (PC) are respectively connected to the input port of each Servo drive (Servo Amp), the output port of each Servo drive (Servo Amp) is connected to the input port of the corresponding Servo motor, the rotation shaft of each Servo motor is connected to the corresponding torque sensor through the corresponding first coupling, the torque sensor is connected to a rotating shaft of the corresponding EPS motor to be tested through the corresponding second coupling; the other three output ports of the industrial Personal Computer (PC) are respectively connected to the input ends of the three paths of EPS motor controllers (inverters), and the output end of each EPS motor controller (inverter) is connected to the input end of each path of EPS motor to be tested; the outputs of the 3 paths of torque sensors are respectively connected to three input ports of an industrial Personal Computer (PC).
In the invention, the torques of the EPS motor under different rotating speeds, different loads and different temperatures can be tested by setting the rotating speed of the servo motor and the temperature of the environment box, so that the multidimensional analysis of the idling torque function of the motor is realized.
FIG. 3 is a flowchart illustrating steps of a durable power load torque testing method for an EPS motor of an automobile according to the present invention. As shown in FIG. 3, the durable power load torque testing method for the automobile EPS motor comprises the following steps:
and step S1, fixing the EPS motor to be tested in the environment box when the self-checking is normal. In the embodiment of the invention, three EPS motors to be tested are tested simultaneously, namely, when three servo motors are all self-tested normally, the three EPS motors to be tested are respectively fixed at corresponding positions in an environment box, wherein the self-test normally refers to the state of equipment when the EPS motors are not loaded.
And step S2, setting the rotating speed of the servo motor and the temperature of the environment box for torque test, and testing the torques of the EPS motor to be tested at different rotating speeds, different loads and different temperatures so as to realize multidimensional analysis of the idling torque function of the motor.
In the embodiment of the present invention, the torque test is divided into 4 modes: the first mode is a compatible mode of the prior art, and the EPS motor to be tested is tested at a constant temperature, a constant rotating speed and a constant load; the second mode, the third mode and the fourth mode are all traversal tests, and the steps of the three modes are similar.
Specifically, the traversal test of the modes two, three and four comprises the following steps:
step 2.1, setting the temperature and humidity of the environmental box, the test time, the heat preservation time, the dragging time, the rotating speed of the servo motor and the load size;
step 2.2, keeping the temperature for a plurality of hours according to the specification after the temperature is reached;
step 2.3, starting a system model torque test;
step 2.4, judging whether traversal is finished, if traversal is finished, ending the test, and if not, skipping to the step 2.1 to modify parameters to enter the next round of test, wherein the parameters comprise environment temperature and humidity, test time, heat preservation time, dragging time, rotating speed of a servo motor and load size;
wherein, the second mode can change the load size to test at the set temperature and rotation speed, the third mode can test according to the load cycle defined in fig. 4, and circularly operate according to phase 1, phase 2, phase 3 and phase 4 at different loads LWA (100% torque, 30 revolutions), LWB (66% torque, 30 revolutions), LWC (30% torque, 10 revolutions) and LWD (15% torque, 5 revolutions), for example, when the load LWA (100% torque, 30 revolutions) is loaded, firstly clockwise 30 revolutions from zero, then anticlockwise 30 revolutions from zero, finally anticlockwise 30 revolutions to zero, the fourth mode is performed at the set temperature and limit load, the servo motor rotation speed is set to accelerate from 0-3000rpm/min within 10 seconds, the torque and the phase line current are measured to obtain the T-N curve (motor characteristic curve, torque-rotation speed curve) of the EPS motor to be tested, and the characteristic analysis of the torque, the current, the rotating speed and the temperature of the motor is realized.
FIG. 5 is a flowchart of a durable power load torque testing method for an automotive EPS motor according to an embodiment of the present invention. As shown in fig. 5, in this embodiment, the endurance power load torque test procedure of the EPS motor of the automobile is as follows:
the method comprises the steps of firstly, detecting an EPS motor to be detected, carrying out correction operation, judging the state of the EPS motor to be detected, adjusting equipment if the self-detection is abnormal (NG), and entering a second step if the self-detection is normal, wherein the self-detection is normal and means the state of the equipment when the EPS motor is not loaded;
secondly, torque testing is carried out in 4 modes, wherein the first mode is a compatible mode in the prior art, and a motor to be tested is tested at a constant temperature, a constant rotating speed and a constant load; the second mode, the third mode and the fourth mode are all traversal tests, and the steps of the three modes are similar.
Step 2.1, setting the temperature and humidity of the environmental box, the test time, the heat preservation time, the dragging time, the rotating speed of the servo motor and the load size;
step 2.2, keeping the temperature for a plurality of hours according to the specification after the temperature is reached;
step 2.3, starting a system model torque test;
step 2.4, judging whether traversal is finished, if traversal is finished, ending the test, if not, skipping to the step 2.1 to modify parameters to enter the next round of test, wherein the modified parameters comprise environment box temperature and humidity, test time, heat preservation time, dragging time, servo motor rotating speed and load size;
the second mode can be tested by changing the load size when setting the temperature and the rotating speed, the third mode is tested according to the load cycle defined in fig. 4, and the load cycle … …, as shown in fig. 4, is defined for the load cycle of the third mode operation, and respectively controls the rotating speed and the load size to simulate the actual operation state of the motor on the whole vehicle.
And the fourth mode is carried out when the temperature and the limit load are set, the rotating speed of the servo motor is set to be accelerated from 0-3000rpm/min within 10 seconds, the torque and the phase line current are measured to obtain a T-N curve (a motor characteristic curve and a torque-rotating speed curve) of the EPS motor to be tested, as shown in figure 6, the T-N curve for the fourth mode is defined, the limit load is loaded on the motor, the motor is dragged to be accelerated from 0-3000rpm/min within 10 seconds, the torque and phase line current curve of the motor is tested, and the characteristic analysis of the torque, the current, the rotating speed and the temperature of the motor is realized
Compared with the prior art, the motor rotating speed, the environment temperature and the load size can be flexibly set, various test modes can be operated, at most 3 EPS motors can be tested simultaneously, various EPS motors can be tested, and the performance analysis of the motors is more comprehensive. The comparison is as follows:
| item | Conventional cogging friction torque testing | Inventive Torque testing |
| Rotational speed | Invariable rotary speed | Variable speed, two-dimensional analysis of speed and load torque |
| Load(s) | Non-variable load | Variable load |
| Temperature of | Non-variable temperature | Variable temperature, two-dimensional analysis of temperature and load torque |
| Frequency domain analysis | Without frequency domain analysis | Fourier transform, frequency and torque positioning, and motor characteristic analysis |
| Kind of motor | Testing only one motor | Testing multiple motors |
| Mode of operation | Only can operate at a constant rotating speed and a constant load condition | Can run four modes and can continue to expand |
| Testing the number of motors | Testing only one motor | Can simultaneously test 3 motors |
In summary, the durable power load torque testing device and method for the automobile EPS motor, provided by the invention, adopt the servo motor as the driving motor, control the driving motor to drive the EPS motor to be tested to rotate in a passive loading manner, use the torque sensor to collect the torque of the motor in the axial direction, and test the torque of the EPS motor at different rotating speeds, different loads and different temperatures by setting the rotating speed of the servo motor and the temperature of the environment box, so as to realize the multidimensional analysis of the idling torque function of the motor.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.
Claims (10)
1. An endurance power load torque testing apparatus of an automotive EPS motor, comprising:
the industrial personal computer is used for controlling the driving module and the EPS motor controller module to act, controlling an environment box in which the EPS motor module to be tested is placed so as to generate corresponding environment temperature and humidity, and receiving data output by the measuring module for analysis and display;
the driving module is used for receiving the instruction of the industrial personal computer and rotating at a rotating speed specified by the instruction;
the measurement module is used for transmitting the mechanical rotation of the driving module to the EPS motor module to be measured so as to complete the measurement of torque and bus and phase line currents and store data to the industrial personal computer;
the EPS motor module to be tested is arranged in the environment box and used for carrying out rotation under the drive of the mechanical rotation of the driving module transmitted by the measuring module according to the control of the industrial personal computer so as to generate corresponding torque;
and the EPS motor controller module is used for outputting specified current to the EPS motor module to be tested according to the control of the industrial personal computer, so that the torque control of the EPS motor is realized.
2. An endurance power load torque testing apparatus of an automotive EPS motor according to claim 1, wherein: the drive module includes servo drive and servo motor, servo drive connects the delivery outlet of industrial computer, servo drive's output is connected to servo motor's input, servo motor's rotation axis is connected the measurement module, servo motor carries out the loading with the form of rotational speed, realizes dragging.
3. An endurance power load torque testing apparatus of an automotive EPS motor according to claim 2, wherein: the measuring module comprises a first coupler, a second coupler and a torque sensor, a rotating shaft of the servo motor is connected to the torque sensor through the first coupler, the torque sensor passes through the second coupler and is connected to a rotating shaft of the EPS motor to be measured, and the output of the torque sensor is connected to the input port of the industrial personal computer.
4. An endurance power load torque testing apparatus of an automotive EPS motor according to claim 3, wherein: and the other output port of the industrial personal computer is connected to the input end of the EPS motor controller module, and the output end of the EPS motor controller module is connected to the input end of the EPS motor module to be tested.
5. An endurance power load torque testing apparatus of an automotive EPS motor according to claim 4, wherein: the environment box is used for placing the EPS motor to be tested and generating fixed environment temperature and humidity under the control of the industrial personal computer so as to be used for testing.
6. An endurance power load torque testing apparatus of an automotive EPS motor according to claim 5, wherein: the environment box is internally provided with three EPS motors to be tested, and the driving module, the measuring module and the EPS motor controller module correspondingly comprise three corresponding devices.
7. A durable power load torque test method of an automobile EPS motor comprises the following steps:
step S1, when the self-checking is normal, fixing the EPS motor to be tested in an environment box;
and step S2, setting the rotating speed of the servo motor and the temperature and humidity of the environment box to perform torque test, and testing the torques of the EPS motor to be tested at different rotating speeds, different loads and different temperatures to realize multidimensional analysis of the idling torque function of the motor.
8. The durable power load torque test method of an automotive EPS motor according to claim 7, characterized in that: in step S1, the three EPS motors to be tested are respectively fixed at corresponding positions in the environmental chamber.
9. The durable power load torque test method of an automotive EPS motor according to claim 7, characterized in that: in step S2, the torque test is divided into 4 modes: in the first mode, the EPS motor to be tested is tested at a constant temperature, a constant rotating speed and a constant load; the second mode, the third mode and the fourth mode are all traversal tests, and the steps of the second mode, the third mode and the fourth mode are similar.
10. The durable power load torque test method of an automotive EPS motor according to claim 9, characterized in that: the traversing test of the modes two, three and four comprises the following steps:
step 2.1, setting the temperature, the humidity and the test time of the environmental box, the heat preservation time, the dragging time, the rotating speed of a servo motor and the load size;
step 2.2, keeping the temperature for a plurality of hours according to the specification after the temperature is reached;
step 2.3, starting a system model torque test;
and 2.4, judging whether traversal is finished, if the traversal is finished, finishing the test, and if the traversal is not finished, skipping to the step 2.1 to modify parameters to enter the next round of test, wherein the modified parameters include but are not limited to environmental box temperature and humidity, test time, heat preservation time, dragging time, servo motor rotating speed and load size.
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| CN201911290690.8A CN110926816A (en) | 2019-12-16 | 2019-12-16 | Durable power load torque testing equipment and method for automobile EPS motor |
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| CN201911290690.8A CN110926816A (en) | 2019-12-16 | 2019-12-16 | Durable power load torque testing equipment and method for automobile EPS motor |
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Cited By (1)
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| CN112525539A (en) * | 2020-11-26 | 2021-03-19 | 湖南行必达网联科技有限公司 | Automobile engine torque detection method and device and automobile environment bin |
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Application publication date: 20200327 |