CN106644502B - Road condition simulation test device and method for electric vehicle motor driving system - Google Patents

Abstract

The invention relates to a road condition simulation test device and method for a motor driving system of an electric vehicle, wherein the device comprises the following components: the system comprises a computer, a motion controller, a loading platform, a driving motor, a motor controller, a strain type torque tester, a power analyzer, a data acquisition module, a power distribution cabinet and a battery pack; and the computer judges whether the motor controller can output enough torque to drive the automobile to operate according to the speed-per-hour instruction under different road conditions. The road condition simulation test device and method for the motor driving system of the electric automobile realize the driving performance test of the motor driving system under the condition of simulating real and complex road conditions and solve the problem of single test function of the traditional test device.

Description

An electric vehicle motor drive system road condition simulation test device and method

technical field

The invention relates to the technical field of electric vehicle testing, in particular to a road condition simulation test device and method for a motor drive system of an electric vehicle.

Background technique

At present, the test device for the electric drive system of electric vehicles generally consists of a loading table, a drive motor, a motor controller, a strain gauge torque tester, a power analyzer, a data acquisition module, a power distribution cabinet, and a battery pack. The loading platform provides load for the drive motor, and the data acquisition module collects the speed, current and torque information of the motor drive system to realize the performance test of the motor drive system.

The function of this device is relatively simple, and it can only complete the performance test of the motor drive system under a specific load, and cannot test the system performance under different complex road conditions. The driving conditions of vehicles are complex and changeable, which puts forward higher requirements for electric vehicles. It is of great significance to test the performance of motor drive systems under different and complex road conditions. The current test equipment cannot realize this function.

Therefore, there is an urgent need for a test method that can simulate the driving performance under real complex road conditions.

Contents of the invention

In view of the above analysis, the present invention aims to provide a road condition simulation test device and method for electric vehicle motor drive system to solve the problem that the existing test device cannot test the system performance under different complex road conditions.

The purpose of the present invention is mainly achieved through the following technical solutions:

A road condition simulation test device for an electric vehicle motor drive system, characterized in that it includes: a computer, a motion controller, a loading platform, a drive motor, a motor controller, a strain gauge torque tester, a power analyzer, a data acquisition module, a power distribution Cabinet and battery pack; where,

The computer is connected with the motion controller, the motor controller and the data acquisition module through the CAN bus, and is used to send control instructions to the motion controller and the motor controller, receive the data reported by the data acquisition module, and process and analyze the data;

The motion controller is connected to the loading table through wires; the motion controller converts the control instructions sent by the computer into load loading instructions and outputs them to the loading table;

The loading table, the strain gauge torque tester, and the driving motor are connected in sequence; the loading table is used to output the loading torque to the driving motor according to the received load loading instruction;

The motor controller is connected to the power analyzer and the drive motor through cables; the motor controller is used to control the output torque and speed of the drive motor through the output control current according to the computer's operating speed command;

The strain gauge torque tester is used to measure the torque and speed of the output shaft of the drive motor through the torque sensor;

The data acquisition module is connected with the strain type torque tester and the power analyzer through wires; it is used to collect the data measured by the strain type torque tester and the power analyzer and report to the computer.

The computer further includes:

Road condition simulation module, instruction sending module and data analysis module; wherein,

The road condition simulation module is used to design different forms of road conditions for electric vehicles, and set the simulated torque for each road condition;

The instruction sending module is used to send road condition simulation control instructions to the motion controller, and send running speed instructions to the motor controller;

The data analysis module is used to analyze the received torque, speed and power data, and judge whether the motor controller can output enough torque under different road conditions to drive the car to run according to the running speed command.

The sequential connection of the loading table, the strain gauge torque tester and the drive motor further includes:

The output shaft of the loading table is connected with one end of the strain gauge torque tester through a coupling, and the other end of the strain gauge torque tester is connected with the output shaft of the driving motor through a coupling.

The road condition simulation control command includes simulated torque information for each road condition;

The running speed command includes simulated running speed information, namely speed and torque.

The judging whether the motor controller can output enough torque under different road conditions to drive the car to run according to the running speed command further includes:

Convert the rotational speed information into the actual running speed and compare it with the simulated running speed; if the actual running speed can reach the simulated running speed, it is considered that the torque output by the motor controller under this road condition is sufficient, and the torque can drive the car according to the running speed Otherwise, it is considered that the torque output by the motor controller is insufficient in this road condition, and the vehicle cannot be driven to run at the simulated running speed in the running speed command under this torque.

A working method of the above-mentioned road condition simulation test device for the electric vehicle motor drive system is characterized in that it comprises the following steps:

Step S1, power on the road condition simulation test device of the electric vehicle motor drive system;

Step S2, the computer sends a road condition simulation control command to the motion controller, and sends a running speed command to the motor controller;

Step S3, the data acquisition module collects the data measured by the strain type torque tester and the power analyzer and reports to the computer;

Step S4, the computer analyzes the received data to determine whether the motor drive system meets the driving requirements of different road conditions;

Step S5, the computer adjusts the road condition simulation control command according to the judgment result, and executes the above steps again until the motor drive system meets the driving requirements of different road conditions.

The step S2 further includes:

The computer sends the road condition simulation control command to the motion controller, and the motion controller converts the road condition simulation command into a load loading command and outputs it to the loading platform; the loading platform outputs the loading torque through the output shaft, and the loading torque is transmitted to the drive the output shaft of the motor;

The computer outputs a running speed command to the motor controller, and the motor controller outputs a control current according to the running speed command to control the drive motor to rotate according to the required speed and torque.

The step S3 further includes:

The power analyzer measures the current and voltage of the motor controller and sends the data to the data acquisition module;

The strain gauge torque tester measures the torque and rotational speed of the output shaft of the drive motor and sends the data to the data acquisition module.

The step S4 further includes:

Convert the rotation speed information into the actual running speed and compare it with the simulated running speed;

If the actual running speed can reach the simulated running speed, it is considered that the torque output by the motor controller under this road condition is sufficient, and the torque can drive the car to run at the simulated running speed in the running speed instruction;

Otherwise, it is considered that the torque output by the motor controller under this road condition is insufficient, and the vehicle cannot be driven to run at the simulated running speed in the running speed command under this torque.

The beneficial effects of the present invention are as follows:

The road condition simulation test device and method for the electric vehicle motor drive system of the present invention realize the drive performance test of the motor drive system under simulated real and complex road conditions, and solve the problem of single test function of the traditional test device.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The drawings are for the purpose of illustrating specific embodiments only and are not to be considered as limitations of the invention, and like reference numerals refer to like parts throughout the drawings.

Figure 1 is a schematic structural diagram of a road condition simulation test device for an electric vehicle motor drive system.

Detailed ways

Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principles of the present invention.

A specific embodiment of the present invention discloses a road condition simulation test device for an electric vehicle motor drive system. As shown in FIG. A controller 5, a strain gauge torque tester 6, a power analyzer 7, a data acquisition module 8, a power distribution cabinet 9, and a battery pack 10.

The communication ports of the computer 1 are respectively connected with the communication ports of the motion controller 2, the motor controller 5 and the data acquisition module 8 through the CAN bus; the computer is used to send control instructions to the motion controller 2 and the motor controller 5, and receive the data acquisition module 8. Report the data, and process and analyze the data;

The output end of the motion controller 2 is connected to the input end of the loading table 3 through a wire; the motion controller 2 converts the control instruction sent by the computer 1 into a load loading instruction, and outputs it to the loading table 3;

The output shaft of the loading table 3 is connected with one end of the strain gauge torque tester through a coupling, and the other end of the strain gauge torque tester 6 is connected with the output shaft of the driving motor 4 through a coupling; the loading table 3 is connected according to the received instruction , output the loading torque to the driving motor 4 through the output shaft of the loading table 3, and the loading torque is transmitted to the output shaft of the driving motor 4 through the strain gauge torque tester 6; Couplings with tight or tapered bushings.

The motor controller 5 output terminals are respectively connected with the power analyzer 7 and the input terminals of the driving motor 4 through cables; the motor controller 5 controls the output torque and the speed of the driving motor 4 according to the torque and speed control instructions from the computer by outputting the control current. Rotating speed;

The strain gauge torque tester is used to measure the torque and rotational speed of the drive motor 4 output shaft through a torque sensor; the torque sensor adopts a digital torque sensor or an analog torque sensor of Symmonstein; The current and voltage of the device are used to calculate its power; the power analyzer adopts WT3000 high-precision power analyzer.

The input end of the data acquisition module 8 is connected with the output ends of the strain type torque tester 6 and the power analyzer 7 by wires; it is used to collect the data measured by the strain type torque tester 6 and the power analyzer 7 and report to the computer;

The power distribution cabinet 9 is used to supply power to the loading platform 3 ; the battery pack 10 is used to provide DC power to the motor controller 5 and further to the drive motor 4 .

Wherein, the computer 1 further includes: a road condition simulation module, an instruction sending module and a data analysis module.

The road condition simulation module is used to program and design different forms of road conditions for electric vehicles, and set the simulated torque for each road condition, including flat road driving, climbing, downhill, frequent start and stop, and bumpy road surfaces;

The instruction sending module is used to send control instructions to the motion controller 2 and the motor controller 5; specifically, the instruction sending module of the computer 1 sends a road condition simulation control instruction to the motion controller 2 and an operating speed instruction to the motor controller 5. Wherein, the road condition simulation control command includes simulated torque information for each road condition; the running speed command includes simulated running speed information, specifically, including speed and torque.

The data analysis module is used to store and analyze the received data, the data includes torque, speed and power data; the data analysis is to convert the speed information reported by the data acquisition module into the actual running speed, and compare it with the simulated running speed Compare; if the actual running speed can reach the simulated running speed, then it is considered that the torque output by the motor controller 5 under the road conditions is sufficient, and under this torque, the car can be driven to run at the simulated running speed in the running speed command sent by the computer 1; Thereby it is judged whether the motor controller 5 can output enough torque under different road conditions to drive the car to run at the simulated running speed in the running speed command issued by the command sending module.

According to another specific embodiment of the present invention, a road condition simulation test method for an electric vehicle motor drive system is disclosed, which specifically includes the following steps:

Step S1, power on the road condition simulation test device of the electric vehicle motor drive system;

The road condition simulation test device includes: a computer 1, a motion controller 2, a loading platform 3, a drive motor 4, a motor controller 5, a strain gauge torque tester 6, a power analyzer 7, a data acquisition module 8, and a power distribution cabinet 9 , battery pack 10.

Step S2, the computer 1 sends the road condition simulation control instruction to the motion controller 2, and the motion controller 2 converts the road condition simulation instruction into a load loading instruction and outputs it to the loading platform 3; after the loading platform 3 receives the loading instruction, it sends Output loading torque to the drive motor, the load torque is transmitted to the output shaft of the drive motor 4 through the strain gauge torque tester 6;

Among them, different road conditions correspond to different loads. When driving on a flat road, the load is the resistance of the car, and when climbing and descending, the load is the sum of the resistance of the car and the component force of the car's gravity on the road surface.

The computer 1 outputs the running speed command to the motor controller 5, and the motor controller 5 controls the output torque and the rotating speed of the driving motor 4 by outputting a control current according to the running speed command of the computer 1.

Step S3, the data acquisition module 8 reports the collected data (including torque and rotational speed) to the computer 1 through the bus network; specifically,

The power analyzer 7 measures the motor controller current and voltage and sends the data to the data acquisition module 8;

The strain gauge torque tester 6 measures the torque and rotational speed of the output shaft of the drive motor 4 and sends the data to the data acquisition module 8 .

Step S4, the computer 1 analyzes the received data, and judges whether the motor drive system meets the driving requirements of different road conditions. Described judgment refers to converting the reported rotating speed into actual running speed, and compares it with the simulated running speed; if the actual running speed can reach the simulated running speed, then it is judged that the motor controller 5 can output enough torque under different road conditions, Drive the car to run according to the car running speed command issued by the computer 1; if the simulated running speed is reached under all road conditions, it means that the motor controller can meet the driving requirements of different road conditions; otherwise, it cannot;

Step S5, the computer 1 adjusts the road condition simulation control command according to the judgment result, and executes the above steps again until the motor drive system meets the driving requirements of different road conditions and reaches the simulated running speed under each road condition.

In summary, the embodiment of the present invention provides a road condition simulation test device and method for an electric vehicle motor drive system, which realizes the driving performance test of the motor drive system under simulated real and complex road conditions, and solves the problem of single test function of the traditional test device .

Those skilled in the art can understand that all or part of the processes of the methods in the above embodiments can be implemented by instructing related hardware through computer programs, and the programs can be stored in a computer-readable storage medium. Wherein, the computer-readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory, and the like.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention.

Claims (6)

1. An electric vehicle motor drive system road condition simulation test device is characterized in that, comprising: computer, motion controller, loading platform, driving motor, motor controller, strain gauge torque tester, power analyzer, data acquisition module, Power distribution cabinets and battery packs; among them, The computer is connected with the motion controller, the motor controller and the data acquisition module through the CAN bus, and is used to send control instructions to the motion controller and the motor controller, receive the data reported by the data acquisition module, and process and analyze the data; The motion controller is connected to the loading table through wires; the motion controller converts the control instructions sent by the computer into load loading instructions and outputs them to the loading table; The loading table, the strain gauge torque tester, and the driving motor are connected in sequence; the loading table is used to output the loading torque to the driving motor according to the received load loading instruction; The motor controller is connected to the power analyzer and the drive motor through cables; the motor controller is used to control the output torque and speed of the drive motor through the output control current according to the computer's operating speed command; The strain gauge torque tester is used to measure the torque and speed of the output shaft of the drive motor through the torque sensor; The data acquisition module is connected with the strain type torque tester and the power analyzer through wires; it is used to collect the data measured by the strain type torque tester and the power analyzer and report to the computer; The computer further includes: Road condition simulation module, instruction sending module and data analysis module; wherein, The road condition simulation module is used to design different forms of road conditions for electric vehicles, and set the simulated torque for each road condition; The instruction sending module is used to send road condition simulation control instructions to the motion controller, and send running speed instructions to the motor controller; The data analysis module is used to analyze the received torque, speed and power data, and judge whether the motor controller can output enough torque under different road conditions to drive the car to run according to the running speed command; convert the speed information into actual operation and compare it with the simulated running speed; if the actual running speed can reach the simulated running speed, it is considered that the torque output by the motor controller under this road condition is sufficient, and the torque can drive the car to follow the simulated running speed in the running speed instruction. Otherwise, it is considered that the torque output by the motor controller in this road condition is insufficient, and the vehicle cannot be driven to run at the simulated running speed in the running speed command under this torque. 2. the electric vehicle motor drive system road condition simulation test device according to claim 1, is characterized in that, described loading table, strain gauge torque tester, drive motor are connected in sequence and further comprise: The output shaft of the loading table is connected with one end of the strain gauge torque tester through a coupling, and the other end of the strain gauge torque tester is connected with the output shaft of the driving motor through a coupling. 3. the electric vehicle motor drive system road condition simulation test device according to claim 2, is characterized in that, The road condition simulation control command includes simulated torque information for each road condition; The running speed command includes simulated running speed information, namely speed and torque. 4. A working method of the electric vehicle motor drive system road condition simulation test device according to claim 1-3, characterized in that, comprising the following steps: Step S1, power on the road condition simulation test device of the electric vehicle motor drive system; Step S2, the computer sends a road condition simulation control command to the motion controller, and sends a running speed command to the motor controller; Step S3, the data acquisition module collects the data measured by the strain type torque tester and the power analyzer and reports to the computer; Step S4, the computer analyzes the received data to determine whether the motor drive system meets the driving requirements of different road conditions: convert the rotational speed information into the actual running speed, and compare it with the simulated running speed; If the actual running speed can reach the simulated running speed, it is considered that the torque output by the motor controller under this road condition is sufficient, and the torque can drive the car to run at the simulated running speed in the running speed instruction; Otherwise, it is considered that the torque output by the motor controller is insufficient under this road condition, and the vehicle cannot be driven to run at the simulated running speed in the running speed command under this torque; Step S5, the computer adjusts the road condition simulation control command according to the judgment result, and executes the above steps again until the motor drive system meets the driving requirements of different road conditions. 5. The method according to claim 4, wherein said step S2 further comprises: The computer sends the road condition simulation control command to the motion controller, and the motion controller converts the road condition simulation command into a load loading command and outputs it to the loading platform; the loading platform outputs the loading torque through the output shaft, and the loading torque is transmitted to the drive the output shaft of the motor; The computer outputs a running speed command to the motor controller, and the motor controller outputs a control current according to the running speed command to control the drive motor to rotate according to the required speed and torque. 6. The method according to claim 4, wherein said step S3 further comprises: The power analyzer measures the current and voltage of the motor controller and sends the data to the data acquisition module; The strain gauge torque tester measures the torque and rotational speed of the output shaft of the drive motor and sends the data to the data acquisition module.