CN110750089B - Performance judgment method for motor controller of test system - Google Patents

Performance judgment method for motor controller of test system Download PDF

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CN110750089B
CN110750089B CN201910966387.9A CN201910966387A CN110750089B CN 110750089 B CN110750089 B CN 110750089B CN 201910966387 A CN201910966387 A CN 201910966387A CN 110750089 B CN110750089 B CN 110750089B
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water pump
motor
controller
temperature
motor controller
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CN110750089A (en
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刘洋
张佳卉
刘江权
石军
曹元福
李源浩
赵春伟
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China North Vehicle Research Institute
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
    • G05B23/0221—Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods
    • 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

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

The invention discloses a performance judgment method of a motor controller of a test system, wherein the test system comprises a driving motor, a controller, a water pump, a radiator, a first electric heating box, a second electric heating box and a control and data acquisition unit, wherein the driving motor and the controller are devices to be tested; the method is characterized in that the drive motor controller heat balance judgment formula is as follows: when in use

Description

Performance judgment method for motor controller of test system
Technical Field
The invention belongs to the technical field of new energy automobiles, and particularly relates to a high-temperature test system for a water pump driving motor and a controller.
Background
In the actual use of the vehicle, the working condition of the vehicle is continuously changed along with the influence of a plurality of factors such as the road surface, the environment and the like, the water pump of the traditional cooling system is driven by the engine, the rotating speed of the water pump is limited by the operating condition of the engine, the transient change of the vehicle in the running process cannot be dynamically responded, the waste of the system capacity and the increase of the power consumption ratio are caused, and the reliable work of the engine is not facilitated. Therefore, with the continuous development of the electric drive technology, the water pump drive is developed from the original engine mechanical drive to the electric drive direction, the research of the highly integrated electronic water pump is one of the important research contents in the field of new energy vehicles in the future, and the development of the electrically driven water pump with high efficiency, compactness, light weight, small volume and high reliability is an indispensable important research content in the technical field of new energy vehicles.
At present, in a high-temperature test of a water pump driving motor and a controller, a load motor is loaded in an anti-dragging mode. If the load motor and the tested motor work in the same control mode, a large impact torque can be generated on a motor transmission shaft, and the reverse dragging impact can cause the damage of the tested motor, the load motor and the torque rotating speed sensor and even cause safety accidents. In addition, the load error of the water pump driving motor is larger in the form of motor back-dragging analog load and under the working condition of the real vehicle, and the test precision is lower.
At present, a good timely, accurate and controllable judging mode is not available for the high-temperature test of the driving motor and the controller, and the invention also researches and improves the high-temperature test.
Disclosure of Invention
In view of this, the invention provides a high-temperature test system for a water pump driving motor and a controller, which can meet the requirements of design and research of the water pump driving motor and the controller in a cooling system of a new energy automobile.
A performance judgment method for a motor controller of a test system comprises a driving motor, a controller, a water pump, a radiator, a first electric heating box, a second electric heating box and a control and data acquisition unit, wherein the driving motor and the controller are devices to be tested; the method is characterized in that the heat balance judgment formula of the motor controller is as follows:
when in use
Figure 356264DEST_PATH_IMAGE001
In time, it can be determined that the motor controller can meet the high temperature test requirements.
Wherein:
Figure 137138DEST_PATH_IMAGE002
is the natural convection heat transfer coefficient of the motor,
Figure 653570DEST_PATH_IMAGE003
;
Figure 697749DEST_PATH_IMAGE004
is the heat dissipation area of the outer surface of the motor controller,
Figure 565211DEST_PATH_IMAGE005
；
Figure 149776DEST_PATH_IMAGE006
the highest temperature resistance of the motor controller is K;
Figure 723977DEST_PATH_IMAGE007
is the temperature of the cooling fluid, K;
Figure 735795DEST_PATH_IMAGE008
the high-temperature environment temperature in the second box body, K;
Figure 559395DEST_PATH_IMAGE009
water flow rate, kg/s;
Pithe pressure value of the water pump inlet, Pa,
Figure 213230DEST_PATH_IMAGE010
the pressure value of the outlet of the water pump, Pa,
Figure 641937DEST_PATH_IMAGE011
the efficiency of the water pump;
Figure 90236DEST_PATH_IMAGE012
the efficiency of the water pump electric drive system;
Figure 869973DEST_PATH_IMAGE013
the efficiency of the water pump motor controller is improved.
Preferably, the data is collected every 10 s.
Preferably, the motor controller can be judged to meet the requirement after the requirement of the formula is met after 24 hours of continuous tests.
Preferably, the test system comprises a driving motor, a controller, a water pump, a radiator, a first electric heating box, a second electric heating box and a control and data acquisition unit, wherein the driving motor and the controller are devices to be tested; it is characterized in that the preparation method is characterized in that,
the water pump and the radiator are connected through a pipeline to form a closed circulation pipeline, the water pump is driven by a driving motor, and the water pump and the driving motor are arranged in the first electric heating box; the controller is arranged in the second electric heating box and is electrically connected with the driving motor; a second pipeline is arranged between the water outlet of the water pump and the radiator, and is provided with a temperature sensor, a pressure sensor I, an electronic valve and a flowmeter, wherein the temperature sensor, the pressure sensor I and the flowmeter are respectively used for detecting the temperature, the pressure and the flow on the second pipeline, and the electronic valve is used for controlling the flow; a pressure sensor is arranged on a pipeline between the water return port of the water pump and the radiator; the control and data acquisition unit is simultaneously connected with the driving motor and the controller, monitors and records the input current and voltage of the controller, the temperature of a controller chip and the temperature of the motor shaft end of the driving motor, and determines the high-temperature test conditions of the driving motor and the controller through the system running time.
Furthermore, a temperature sensor and a shutter are arranged on the wall surface of the electric heating box, and the temperature in the electric heating box is adjusted through the shutter arranged at the top.
Further, a cooling fan is included, the cooling fan being integrated with the heat sink.
Furthermore, steam ports are respectively arranged on the radiator and the expansion water tank and used for discharging gas generated in water system circulation.
Furthermore, the electronic valve is used for adjusting the flow and pressure of an inlet and an outlet of the water pump, and the loading load of the driving motor is determined through the opening degree of the electronic valve.
Furthermore, a water replenishing port is arranged at the lower part of the expansion water tank and used for replenishing water to the water pump.
Has the advantages that:
1. according to the invention, through a large amount of researches, a new controller heat balance judgment formula is provided, whether the controller meets the requirements or not is judged through the heat balance judgment formula, the test intellectualization is improved, and the judgment method is greatly simplified.
2. According to the invention, through a large amount of researches, a new motor heat balance judgment formula is provided, whether the motor meets the requirements or not is judged through the heat balance judgment formula, the test intellectualization is improved, and the judgment method is greatly simplified.
3. The driving motor and the controller to be tested are respectively arranged in the electric heating boxes with different temperatures, the working medium is directly driven by the water pump to be loaded, the rack is simple and convenient to connect, the load control is accurate, and the test safety is higher.
Drawings
FIG. 1 is a schematic diagram of the high temperature test system of the water pump driving motor and the controller of the present invention.
The system comprises a driving motor 1, a controller 2, a water pump 3, an electric heating box I4, an electric heating box II 5, a temperature sensor I6, a temperature sensor II 7, a shutter I8, a shutter II 9, a radiator 10, a cooling fan 11, an expansion water tank 12, a flow meter 13, an electronic valve 14, a temperature sensor 15, a pressure sensor I16, a pressure sensor II 17, a control and data acquisition unit 18.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in fig. 1, the invention provides a high-temperature test system of a water pump driving motor and a controller, which comprises a driving motor 1, a controller 2, a water pump 3, a radiator 10, an expansion water tank 12, a first electric heating box 4, a second electric heating box 5 and a control and data acquisition unit 18, wherein the driving motor 1 and the controller 2 are devices to be tested;
the water pump 3 and the radiator 10 are connected through a pipeline to form a closed circulation pipeline, the water pump 3 is driven by the driving motor 1, and the water pump 3 and the driving motor 1 are arranged in the first electric heating box 4; the controller 2 is arranged in the second electric heating box 5, and the controller 2 is electrically connected with the driving motor 1 (the controller 2 is used for controlling the rotating speed of the driving motor, and the rotating speed determines the loading amount); a second pipeline is arranged between the water outlet of the water pump 3 and the radiator 10, a temperature sensor 15, a pressure sensor I16, an electronic valve 14 and a flowmeter 13 are arranged on the second pipeline, wherein the temperature sensor 15, the pressure sensor I16 and the flowmeter are respectively used for detecting the temperature, the pressure and the flow on the second pipeline, and the electronic valve 14 is used for controlling the flow. A pressure sensor 17 is arranged on a pipeline between a water return port of the water pump and the radiator 10; the control and data acquisition unit 18 is simultaneously connected with the driving motor 1 and the controller 2, the control and data acquisition unit 18 monitors and records the input current and voltage of the controller 2, the temperature of a chip of the controller 2 and the temperature of a motor shaft end of the driving motor, and the high-temperature test conditions of the driving motor and the controller are determined through the system operation time.
According to the invention, by arranging the new test system, the driving motor to be tested and the controller are respectively arranged in the electric heating boxes with different temperatures, and the working medium is directly driven by the water pump to be loaded, so that the problem of back-dragging impact caused by the fact that the load motor and the tested motor work in the same control mode in the prior art is avoided, safety accidents are avoided, and the safety performance is high.
The test system has the advantages of simple and convenient bench connection, accurate load control and higher test safety.
Preferably, a first pipeline is arranged between the water pump 3 and the radiator 10, the expansion tank 12 is arranged on the first pipeline, a water replenishing port is arranged at the lower part of the expansion tank 12 and is used for replenishing water for the water pump 3, and a water inlet of the expansion tank 12 is connected with the radiator 10. The second pipeline and the first pipeline are in a parallel structure.
Preferably, the expansion tank is used for supplementing water to the inlet of the water pump, preventing cavitation at the inlet of the impeller of the water pump, removing steam from the radiator and not participating in heat exchange. This circuit only occupies a small part, the majority of the coolant takes the main path: radiator-water pump-radiator.
Preferably, the first electric heating box 4 is controlled to have a temperature of 105 ℃ and the second electric heating box 5 is controlled to have a temperature of 85 ℃. The temperature setting is used for realizing the overall index requirement.
Set up temperature sensor I6 and temperature sensor II 7 on the wall of electric heating case I4, electric heating case II 5 respectively, adjust incasement temperature through I8 of shutter, the II 9 of shutter that set up at top separately.
The heat sink 10 is integrated with a cooling fan 11 to dissipate heat generated during the test.
The radiator 10 and/or the expansion tank 12 are provided with steam outlets, respectively, for discharging steam generated in the water system cycle. Because steam is generated in the circulation, the generated steam is discharged through the steam outlet.
Preferably, the steam discharged from the radiator 10 enters the expansion tank through a pipeline (preferably a first pipeline) to achieve the recycling of the steam.
The electronic valve 14 is used for adjusting the flow and pressure of the inlet and the outlet of the water pump 3, so as to determine the loading load of the motor. The opening of the electronic valve 14 and the loading load of the motor are adapted by the control and data acquisition unit 18.
Preferably, the invention determines a new motor heat balance judgment formula through a large amount of research and by combining the test platform, and automatically calculates whether the driving motor meets the test requirements through controlling and acquiring data acquired by a power supply.
Motor thermal balance determination formula:
when in use
Figure 61920DEST_PATH_IMAGE014
In time, it can be judged that the driving motor can meet the high-temperature test requirements.
Wherein:
Figure 345134DEST_PATH_IMAGE002
the heat transfer coefficient of the motor natural convection is 10-15
Figure 964334DEST_PATH_IMAGE003
;
Figure 25176DEST_PATH_IMAGE015
The heat dissipation area of the outer surface of the motor,
Figure 958497DEST_PATH_IMAGE005
(ii) a Obtained by geometric calculation;
Figure 158534DEST_PATH_IMAGE016
the highest temperature resistance of the motor is K; selected by the design time of the motor;
Figure 948635DEST_PATH_IMAGE007
the temperature of the cooling liquid at the inlet of the water pump is K; measured by the temperature sensor 15;
Figure 437385DEST_PATH_IMAGE008
the high temperature environment temperature in the test chamber (first chamber body), K; measuring by a temperature sensor I6;
Figure 971135DEST_PATH_IMAGE009
water flow rate, kg/s; as measured by flow meter 13;
Piis the water pump inlet pressure value, Pa, measured by the pressure sensor 16;
Figure 228941DEST_PATH_IMAGE010
the pressure value Pa of the outlet of the water pump is measured by a pressure sensor 17;
Figure 455523DEST_PATH_IMAGE011
the efficiency of the water pump; testing the performance of the water pump;
Figure 165990DEST_PATH_IMAGE012
the efficiency of the water pump electric drive system; testing and measuring the performance of the electric drive system of the motor;
Figure 503430DEST_PATH_IMAGE017
the efficiency of the water pump motor; testing the performance of the motor;
the judgment formula is obtained through a large number of tests and researches, whether the tested driving motor meets the requirements or not can be automatically judged through the judgment formula, and the detection intelligence is improved.
Preferably, the data is collected every 10 s.
Preferably, the motor can be judged to meet the requirement after the requirement of the formula is met after 24 hours of continuous tests.
Preferably, the invention determines a new motor controller heat balance judgment formula through a large amount of research and by combining the test platform, and automatically calculates whether the controller 2 meets the test requirements through controlling and acquiring data acquired by the power supply.
The motor controller heat balance determination formula:
when in use
Figure 678060DEST_PATH_IMAGE001
In time, it can be determined that the motor controller can meet the high temperature test requirements.
Wherein:
Figure 747647DEST_PATH_IMAGE002
the heat transfer coefficient of the motor natural convection is 10-15
Figure 273306DEST_PATH_IMAGE003
;
Figure 86541DEST_PATH_IMAGE004
Is the heat dissipation area of the outer surface of the motor controller,
Figure 381257DEST_PATH_IMAGE005
(ii) a Obtained by geometric calculation;
Figure 621745DEST_PATH_IMAGE007
is the temperature of the cooling fluid, K; measured by the temperature sensor 15;
Figure 634700DEST_PATH_IMAGE006
the highest temperature resistance of the motor controller is K; selected by the design time of the motor controller;
Figure 251626DEST_PATH_IMAGE008
the high temperature environment temperature in the test chamber (second chamber body), K; measured by the temperature sensor 7;
Figure 135269DEST_PATH_IMAGE009
water flow rate, kg/s; as measured by flow meter 13;
Piis the water pump inlet pressure value, Pa, measured by the pressure sensor 16;
Figure 874555DEST_PATH_IMAGE010
the pressure value Pa of the outlet of the water pump is measured by a pressure sensor 17;
Figure 46910DEST_PATH_IMAGE011
the efficiency of the water pump; testing the performance of the water pump;
Figure 264265DEST_PATH_IMAGE012
the efficiency of the water pump electric drive system; testing and measuring the performance of the electric drive system of the motor;
Figure 471255DEST_PATH_IMAGE013
the efficiency of a water pump motor controller; testing and measuring by a motor controller performance test;
the judgment formula is obtained through a large number of tests and researches, whether the tested controller meets the requirements or not can be automatically judged through the judgment formula, and the detection intelligence is improved.
Preferably, the data is collected every 10 s.
Preferably, the controller can be judged to meet the requirement after the requirement of the formula is met after 24 hours of continuous tests.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. A performance judgment method for a motor controller of a test system comprises a driving motor, a controller, a water pump, a radiator, a first electric heating box, a second electric heating box, a control and data acquisition unit, a temperature sensor, a flowmeter and a pressure sensor, wherein the driving motor and the controller are devices to be tested; the water pump and the driving motor are arranged in the first electric heating box; the controller is arranged in the second electric heating box;
according to a motor controller heat balance judgment formula:
when in use
Figure FDA0002577836870000011
When the motor controller can meet the high-temperature test requirement, judging that the motor controller can meet the high-temperature test requirement;
wherein:
k is the natural convection heat transfer coefficient of the motor and the unit is W/m2The empirical value is 10-15W/m2℃；
FcThe heat dissipation area of the outer surface of the motor controller is m2(ii) a Obtained by geometric calculation;
Tcthe highest temperature resistance of the motor controller is represented by K; selected by the design time of the motor;
Twthe temperature of the cooling liquid at the inlet of the water pump is K; measured by a temperature sensor;
Tathe high-temperature environment temperature in the second box body is represented by K; by temperature sensingMeasuring by using a tester;
q is water flow and the unit is kg/s; measured by a flow meter;
Pithe pressure value is the inlet pressure value of the water pump, the unit is Pa, and the pressure is measured by a pressure sensor;
Pothe pressure value of the outlet of the water pump is measured by a pressure sensor, and the unit is Pa;
ηpthe efficiency of the water pump; testing the performance of the water pump;
ηsthe efficiency of the water pump electric drive system; testing and measuring the performance of the electric drive system of the motor;
ηcthe efficiency of a water pump motor controller; determined by the motor performance test.
2. The method of claim 1, wherein the data is collected every 10 seconds.
3. The method for judging the performance of the motor controller of the test system according to claim 1, wherein the motor controller can be judged to meet the requirements of the formula by continuously testing for 24 hours.
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