CN110806322A - Multi-motor mode chassis dynamometer - Google Patents

Multi-motor mode chassis dynamometer Download PDF

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Publication number
CN110806322A
CN110806322A CN201911274676.9A CN201911274676A CN110806322A CN 110806322 A CN110806322 A CN 110806322A CN 201911274676 A CN201911274676 A CN 201911274676A CN 110806322 A CN110806322 A CN 110806322A
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CN
China
Prior art keywords
motor
detection
control module
dynamometer
load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911274676.9A
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Chinese (zh)
Inventor
唐俊岭
李貌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHONGQING CAERI AUTOMOBILE TEST EQUIPMENT DEVELOPMENT CO LTD
China Automotive Engineering Research Institute Co Ltd
Original Assignee
CHONGQING CAERI AUTOMOBILE TEST EQUIPMENT DEVELOPMENT CO LTD
China Automotive Engineering Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHONGQING CAERI AUTOMOBILE TEST EQUIPMENT DEVELOPMENT CO LTD, China Automotive Engineering Research Institute Co Ltd filed Critical CHONGQING CAERI AUTOMOBILE TEST EQUIPMENT DEVELOPMENT CO LTD
Priority to CN201911274676.9A priority Critical patent/CN110806322A/en
Publication of CN110806322A publication Critical patent/CN110806322A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00Testing of vehicles
    • G01M17/007Wheeled or endless-tracked vehicles

Abstract

The invention relates to the technical field of dynamometers, in particular to a multi-motor mode chassis dynamometer, which comprises a dynamometer motor and a detection device, wherein the dynamometer motor comprises a first motor, a second motor and a third motor; the device comprises a road load detection device, a control module and a control module, wherein the control module is used for grading the road load according to the size of the road load, the control module is used for controlling the number of the activated dynamometer motors and the number of the detection devices according to the load grade, and the higher the load grade is, the more the number of the activated dynamometer motors is. The multi-motor mode chassis dynamometer provided by the invention can solve the problems of narrow test range, poor universality and low measurement accuracy under the condition of large road load of the conventional dynamometer driven by a single dynamometer motor.

Description

Multi-motor mode chassis dynamometer
Technical Field
The invention relates to the technical field of dynamometers, in particular to a multi-motor mode chassis dynamometer.
Background
The automobile chassis dynamometer is an indoor test device for testing vehicle dynamic indexes, fuel economy, multi-working-condition emission and the like. The roller simulates the road surface, and the dynamometer motor simulates the road load, so that the accurate simulation of each working condition of the automobile is realized.
The existing chassis dynamometer is generally divided into two types, one type is a chassis dynamometer with a side-mounted motor, namely, the motor is placed at one side of the dynamometer for driving. Due to the simple structure, most of the automobile chassis dynamometer adopt the form. The other type is a chassis dynamometer with a built-in motor, namely the motor is placed in the middle of the dynamometer, the chassis dynamometer has a compact structure, the size of the whole dynamometer is reduced, and convenience is brought to the carrying and placement of the dynamometer. At present, the two types of chassis dynamometer machines are generally driven by a single dynamometer motor to realize road load simulation. Where road loads are typically measured by a force sensor assembly mounted on the alternator housing.
The single dynamometer motor drives to realize road simulation, and has the following defects:
1. the driving mode of a single dynamometer motor cannot give consideration to the conditions of large road load and small road load, the test range is narrow, and the universality is poor; if the dynamometer is designed for small road load, the driving force is small, the condition of large road load cannot be met, and the dynamometer for the condition of large road load has large dynamometer motor power and force sensor measuring range, so that the accurate loading of small road simulation cannot be realized; therefore, in practical application, a plurality of sets of dynamometer equipment need to be configured, and the cost and the test complexity are increased.
2. The force sensor measurement accuracy has a direct relation with the sensor range, and for a dynamometer under the condition of large road load, the measurement accuracy is lower when the sensor range is larger.
Disclosure of Invention
The invention provides a multi-motor mode chassis dynamometer, which can solve the problems of narrow test range, poor universality and low measurement accuracy under the condition of large road load of the conventional dynamometer driven by a single dynamometer motor.
In order to solve the technical problem, the present application provides the following technical solutions:
a multi-motor mode chassis dynamometer comprises a dynamometer motor and a detection device, wherein the dynamometer motor comprises a first motor, a second motor and a third motor, the second motor and the third motor are respectively arranged on two sides of the first motor and are coaxially connected with the first motor, and rollers are arranged between the second motor and the first motor and between the third motor and the first motor; the detection device comprises a first detection device, a second detection device and a third detection device, and the first detection device, the second detection device and the third detection device are respectively used for detecting the torque and the rotating speed of the first motor, the second motor and the third motor; the device comprises a control module and a detection device, wherein the control module is used for carrying out classification on road load according to the size of the road load, the larger the road load is, the higher the load grade is, the control module is used for controlling the number of the activated dynamometer motors and the detection device according to the load grade, and the higher the load grade is, the more the number of the activated dynamometer motors is.
In the technical scheme of the invention, three dynamometer motors are adopted for load loading, different dynamometer motors are started according to road load, the road load testing range is wide, and the conditions of large road load and small road load can be considered. Through setting up corresponding default, realize hierarchical formula road load loading, use the dynamometer motor and the detection device of different quantity according to the grade difference, detect jointly by a plurality of detection device and can reduce single detection device's sensor range, and then improve road load measuring accuracy.
Further, the control module defaults to set the first motor as a main motor, sets the second motor and the third motor as auxiliary motors, the load grade is divided into a high grade and a low grade, and when the road load is smaller than a preset value, the control module judges that the load grade is the low grade, only starts the main motor and the first detection device but not starts the auxiliary motors and the corresponding second detection device and the third detection device; and the control module is used for judging the load grade to be high grade and starting all the dynamometer motors and the detection devices when the road load is greater than the preset value.
Two levels are set, and the opening and closing of the main motor and the auxiliary motor are controlled according to the road load.
Furthermore, the first motor and the second motor and the third motor are connected through couplers.
The coaxial connection of the motor is realized through the coupler.
Further, the control module is also used for adjusting the main and auxiliary roles of the first motor, the second motor and the third motor according to the user input or the state of the dynamometer motor.
By switching the main role and the auxiliary role, the auxiliary motor can be converted into the main motor to be used when necessary, and further road simulation loading can be realized by the auxiliary motor when the main motor fails, so that the working reliability of the system is ensured.
Further, the control module includes a first control module, a second control module, and a third control module, and is configured to obtain data of the first detection device, the second detection device, and the third detection device, and control the first motor, the second motor, and the third motor, respectively.
Each control module controls each motor independently, so that the control of each motor is modularized, and the control and the maintenance are convenient.
Further, the control module corresponding to the auxiliary motor is used for carrying out closed-loop control on the torque according to a target torque value received from the upper computer and a detection result of the corresponding detection device; the control module corresponding to the auxiliary motor is also used for sending the torque acquired by the corresponding detection device to the control module corresponding to the main motor, and the control module corresponding to the main motor is also used for calculating the control quantity of the main motor through a road resistance equation according to the detection result of the detection device corresponding to the main motor and the torque sent by the control module corresponding to the auxiliary motor, and carrying out closed-loop control on the main motor according to the control quantity of the main motor.
The control module carries out real-time operation control on each dynamometer motor, data acquisition of the detection device and transmission of control quantity of the control module are almost simultaneously carried out, and the acquisition, operation and transmission are all millisecond-level processes, so that the real-time performance of the system and the response speed of closed-loop control are greatly improved.
Further, the first control module, the second control module and the third control module respectively comprise a controller and a frequency converter, and the controller controls the dynamometer motor through the frequency converter. And the control of each dynamometer motor is realized through a frequency converter.
Further, the first detection device, the second detection device and the third detection device each include a torque sensor and a speed sensor. The torque of each dynamometer motor is measured through a torque sensor, and the rotating speed of the dynamometer motor is detected through a speed sensor.
Further, the first detection device, the second detection device and the third detection device share one speed sensor. The whole system adopts a speed sensor signal to be directly input into the three control modules, so that the consistency of the speed signals of the three control modules is ensured, and the possibility of carrying out single road simulation control and system fault redundancy by the auxiliary motor is increased.
Furthermore, industrial Ethernet is adopted for data communication among the control modules, between the control modules and the upper computer, between the control modules and the detection device and between the controller and the frequency converter in the control modules.
The industrial Ethernet is adopted for data transmission, the delay of the data transmission quantity of the short message in a physical layer and a data link layer can be almost ignored, and the real-time performance of the whole control system is ensured.
Drawings
FIG. 1 is a partial cross-sectional view of an embodiment of a multi-motor mode chassis dynamometer according to the present disclosure;
FIG. 2 is a logic block diagram of an embodiment of a multi-motor mode chassis dynamometer according to the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
the reference numbers in the drawings of the specification include: the device comprises a first motor 1, a second motor 2, a third motor 3, a coupler 4 and a roller 5.
As shown in fig. 1 and fig. 2, the multi-motor mode chassis dynamometer of the present embodiment includes a dynamometer motor and a detection device, the dynamometer motor includes a first motor 1, a second motor 2 and a third motor 3, the second motor 2 and the third motor 3 are respectively disposed at two sides of the first motor 1 and are coaxially connected to the first motor 1 through a coupling 4, and rollers 5 are fixedly mounted between the second motor 2 and the first motor 1 and between the third motor 3 and the first motor 1; the detection device comprises a first detection device, a second detection device and a third detection device, and the first detection device, the second detection device and the third detection device are respectively used for detecting the torque and the rotating speed of the first motor 1, the second motor 2 and the third motor 3; specifically, the first detection device, the second detection device and the third detection device each include a torque sensor and a speed sensor. The torque of each dynamometer motor is measured through a torque sensor, and the rotating speed of the dynamometer motor is detected through a speed sensor.
The device comprises a control module, wherein the control module is used for grading the road load according to the road load, the larger the road load is, the higher the load grade is, the control module is used for controlling the number of the activated dynamometer motors and the number of the detection devices according to the load grade, and the higher the load grade is, the more the number of the activated dynamometer motors is. In the embodiment, the control module defaults to set the first motor 1 as a main motor, sets the second motor 2 and the third motor 3 as auxiliary motors, and divides the load grade into a high grade and a low grade, when the road load is smaller than a preset value, the control module judges that the load grade is the low grade, and only starts the main motor and the first detection device but not starts the auxiliary motors and the corresponding second detection device and third detection device; and the control module is used for judging the load grade to be high grade and starting all the dynamometer motors and the detection devices when the road load is greater than the preset value.
The control module comprises a first control module, a second control module and a third control module, and is used for respectively acquiring data of the first detection device, the second detection device and the third detection device and respectively controlling the first motor 1, the second motor 2 and the third motor 3. The first control module comprises a first controller and a first frequency converter, the second control module comprises a second controller and a second frequency converter, and the third control module comprises a third controller and a third frequency converter.
The dynamometer of the embodiment can work in two operation modes, one mode is a speed operation mode, the speed operation mode is suitable for tests such as heat balance and driving wheel power measurement, under the speed operation mode, the main motor works in a speed mode, namely the main motor is in a motor state, the auxiliary motor works in a torque mode, namely the auxiliary motor is in a power generation state, and the auxiliary motor performs closed-loop torque control loading for sharing the resistance of the main motor for loading a vehicle through the rotating hub according to a set loading proportion. The main motor works in a speed mode, the self-adaptive loading can be carried out on the vehicle at a constant speed (the larger the driving force generated by the vehicle engine is, the larger the resistance applied by the main motor for maintaining the constant speed is), and the final effect is that the three motors apply resistance to the vehicle through the rotating hub according to a set loading proportion to drive the vehicle to exert the maximum traction force at a certain constant speed point. The other mode is a torque working mode which is suitable for a road simulation test, in the mode, the three dynamometric motors all work in the torque mode, namely the dynamometric motors are in a generator state, the vehicle actively drives the rotating hub to run, and the three motors work according to a set loading proportion to calculate the real-time running resistance of the vehicle according to a road resistance equation so as to load the vehicle.
Specifically, in order to implement the control process of the above mode, the control module corresponding to the auxiliary motor in this embodiment is configured to perform closed-loop control of the torque according to the target torque value received from the upper computer and the detection result of the corresponding detection device; the control module corresponding to the auxiliary motor is also used for sending the torque acquired by the corresponding detection device to the control module corresponding to the main motor, and the control module corresponding to the main motor is also used for calculating the control quantity of the main motor through a road resistance equation according to the detection result of the detection device corresponding to the main motor and the torque sent by the control module corresponding to the auxiliary motor, and sending the control quantity of the main motor to the corresponding frequency converter so as to realize closed-loop control on the main motor.
In this embodiment, the control module is further configured to adjust the primary and secondary roles of the first motor 1, the second motor 2, and the third motor 3 according to a user input or a state of the dynamometric motor. The function is realized based on a control signal of the upper computer, and the first control module, the second control module and the third control module switch roles after receiving the control signal of the upper computer. By switching the main role and the auxiliary role, the auxiliary motor can be converted into the main motor to be used when necessary, and further road simulation loading can be realized by the auxiliary motor when the main motor fails, so that the working reliability of the system is ensured.
In this embodiment, data communication is performed between the control modules, between the control module and the upper computer, between the control module and the detection device, and between the controller and the frequency converter in the control module, by using an industrial ethernet. The industrial Ethernet is adopted for data transmission, so that the delay of the data transmission quantity of the short message in a physical layer and a data link layer can be almost ignored, and the real-time performance of the whole control system is ensured.
Example two
The difference between this embodiment and the first embodiment is that the first detection device, the second detection device, and the third detection device in this embodiment share one speed sensor, in this embodiment, the speed sensor is an encoder, and the entire system uses one encoder signal to directly input to three control modules, so that the consistency of the speed signals of the three control modules is ensured, and the possibility of the auxiliary motor performing single road simulation control and system fault redundancy is also increased.
The above are merely examples of the present invention, and the present invention is not limited to the field related to this embodiment, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein too much, and those skilled in the art can know all the common technical knowledge in the technical field before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the scheme, and some typical known structures or known methods should not become barriers to the implementation of the present invention by those skilled in the art in light of the teaching provided in the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (10)

1. The utility model provides a many motor mode chassis dynamometer, includes dynamometer motor and detection device, its characterized in that: the dynamometer motors comprise a first motor, a second motor and a third motor, the second motor and the third motor are respectively arranged on two sides of the first motor and are coaxially connected with the first motor, and rollers are arranged between the second motor and the first motor and between the third motor and the first motor; the detection device comprises a first detection device, a second detection device and a third detection device, and the first detection device, the second detection device and the third detection device are respectively used for detecting the torque and the rotating speed of the first motor, the second motor and the third motor; the device comprises a control module and a detection device, wherein the control module is used for carrying out classification on road load according to the size of the road load, the larger the road load is, the higher the load grade is, the control module is used for controlling the number of the activated dynamometer motors and the detection device according to the load grade, and the higher the load grade is, the more the number of the activated dynamometer motors is.
2. A multi-motor mode chassis dynamometer according to claim 1 and further comprising: the control module defaults to set the first motor as a main motor and sets the second motor and the third motor as auxiliary motors, the load grade is divided into a high grade and a low grade, when the road load is smaller than a preset value, the control module judges that the load grade is the low grade, and only starts the main motor and the first detection device but not starts the auxiliary motors and the corresponding second detection device and the third detection device; and the control module is used for judging the load grade to be high grade and starting all the dynamometer motors and the detection devices when the road load is greater than the preset value.
3. A multi-motor mode chassis dynamometer according to claim 1 and further comprising: the first motor and the second motor and the third motor are connected through couplers.
4. A multi-motor mode chassis dynamometer according to claim 2, further comprising: the control module is also used for adjusting the main and auxiliary roles of the first motor, the second motor and the third motor according to the user input or the state of the dynamometer motor.
5. A multi-motor mode chassis dynamometer according to claim 4 and further comprising: the control module comprises a first control module, a second control module and a third control module, and is used for respectively acquiring data of the first detection device, the second detection device and the third detection device and respectively controlling the first motor, the second motor and the third motor.
6. A multi-motor mode chassis dynamometer according to claim 5, further comprising: the control module corresponding to the auxiliary motor is used for carrying out closed-loop control on the torque according to a target torque value received from the upper computer and a detection result of the corresponding detection device; the control module corresponding to the auxiliary motor is also used for sending the torque acquired by the corresponding detection device to the control module corresponding to the main motor, and the control module corresponding to the main motor is also used for calculating the control quantity of the main motor through a road resistance equation according to the detection result of the detection device corresponding to the main motor and the torque sent by the control module corresponding to the auxiliary motor, and carrying out closed-loop control on the main motor according to the control quantity of the main motor.
7. A multi-motor mode chassis dynamometer according to claim 6 and further comprising: the first control module, the second control module and the third control module respectively comprise a controller and a frequency converter, and the controller controls the dynamometer motor through the frequency converter.
8. A multi-motor mode chassis dynamometer according to claim 7 and further comprising: the first detection device, the second detection device and the third detection device comprise a torque sensor and a speed sensor.
9. A multi-motor mode chassis dynamometer according to claim 8 and further comprising: the first detection device, the second detection device and the third detection device share one speed sensor.
10. A multi-motor mode chassis dynamometer according to claim 9 and further comprising: and data communication is carried out among the control modules, between the control modules and the upper computer, between the control modules and the detection device, and between the controller and the frequency converter in the control modules by adopting an industrial Ethernet.
CN201911274676.9A 2019-12-12 2019-12-12 Multi-motor mode chassis dynamometer Pending CN110806322A (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112557061A (en) * 2021-02-26 2021-03-26 北京新能源汽车股份有限公司 Electric drive power assembly test system

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US5375460A (en) * 1993-04-09 1994-12-27 Clayton Industries Method and apparatus for testing motor vehicles under simulated road conditions
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CN103105781A (en) * 2013-03-04 2013-05-15 北京理工大学 Multi-spindle independent motor chassis dynamometer system driving resistance analog loading method and system thereof
CN108548677A (en) * 2018-04-04 2018-09-18 上海隆伍测控技术合伙企业(有限合伙) Chassis dynamometer and intelligent automobile testing stand comprising chassis dynamometer
CN208206359U (en) * 2018-04-13 2018-12-07 上海昂勤测控科技有限公司 A kind of oversize vehicle chassis dynamometer
CN109975034A (en) * 2019-04-19 2019-07-05 重庆凯瑞汽车试验设备开发有限公司 A kind of Heavy-duty chassis dynamometer road resistance analog control system and method

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US5452605A (en) * 1991-02-08 1995-09-26 Clayton Industries Dynamometer for simulating the inertial and road load forces encountered by motor vehicles
EP0507631A1 (en) * 1991-04-05 1992-10-07 Clayton Industries Method and apparatus for testing two or four wheel drive vehicles under simulated road conditions
US5375460A (en) * 1993-04-09 1994-12-27 Clayton Industries Method and apparatus for testing motor vehicles under simulated road conditions
CN201104254Y (en) * 2007-06-08 2008-08-20 北汽福田汽车股份有限公司 Power dynamometer system for heavy-duty vehicle chassis
CN101581613A (en) * 2009-06-16 2009-11-18 深圳市万德源科技发展有限公司 Dynamometer for automobile chassis and measurement and control method thereof
CN101750176A (en) * 2010-01-19 2010-06-23 中国汽车技术研究中心 Electric power measuring machine automatically centering automobile chassis
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CN109975034A (en) * 2019-04-19 2019-07-05 重庆凯瑞汽车试验设备开发有限公司 A kind of Heavy-duty chassis dynamometer road resistance analog control system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112557061A (en) * 2021-02-26 2021-03-26 北京新能源汽车股份有限公司 Electric drive power assembly test system

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