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Dynamic performance test method of vehicle electric driving system

A technology of electric drive system and test method, which is applied in the direction of vehicle test, machine/structural component test, measuring device, etc. It can solve the problem of ignoring the working state of the battery pack, the source of energy feedback, driving resistance energy consumption, and testing the characteristics of the whole vehicle Lack of other issues

Active Publication Date: 2010-04-14
TSINGHUA UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the domestic test benches use dynamometers as loading equipment to test the on-board motor and its control. The embodiment of resistance energy consumption
Such a test bench is lacking in testing the characteristics of the whole vehicle

Method used

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  • Dynamic performance test method of vehicle electric driving system

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the embodiments.

[0014] refer to figure 1 , when the vehicle is in the driving state, the fuel cell simulator 1 and the battery pack 3 jointly provide electric energy to the on-board motor 5 under the coordinated control of the power regulation controller 15, and the on-board motor 5 converts the electric energy under the control of the on-board motor controller 13 In order to transfer the mechanical energy to the load motor 6, the load motor controller 14 obtains the power demand by calculating the current vehicle speed and acceleration, etc., thereby controlling the load motor 6 to convert the mechanical energy into electric energy, while the load simulation controller 16 calculates the driving resistance (including rolling resistance, Air resistance, etc.) account for the proportion of the total power, and control the power consumed by the resistance box 10. At this time, the electric energ...

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Abstract

A dynamic performance test method of a vehicle electric driving system belongs to the technical field of electric automobiles. A vehicular motor output shaft is connected and coaxial with a load motor output shaft, when in driving, power of a driving system is transmitted from a vehicular motor and a load motor to be transformed into electric energy to be stored in a super capacitor or consumed on a resistance box, when in braking, energy is transmitted from the super capacitor to be consumed by the resistance box and then fed back to a battery pack via the load motor and the vehicular motor, and then running of the load motor is controlled and actual load torque is simulated, further, a load simulation controller computes power consumed by driving resistance and power transformed to vehicle power according to current circulating speed, vehicle parameters and road conditions and controls resistance of the resistance box, namely controlling energy consumed by the resistance box to be equal to energy consumed by driving resistance. The dynamic performance test method of a vehicle electric driving system can be used for research on the driving control strategy individually and research on the braking control strategy, and simultaneously can be applied to research on the total vehicle control strategy more conveniently.

Description

technical field [0001] The invention relates to a method for simulating the running conditions of an electric vehicle on a stand, that is, a scheme for simulating the running conditions of the vehicle-mounted motor by loading the vehicle-mounted motor, and belongs to the technical field of electric vehicles. Background technique [0002] At present, the country puts the vigorous development of electric vehicles on the agenda. In the entire electric vehicle powertrain, the basic performance and control effect of the motor are the direct factors that affect the performance index of the vehicle. Therefore, a system that can reflect the characteristics of the motor under automotive conditions is of great significance. Taking the prototype car as the test object, although the corresponding motor results can be obtained very well, but it is not the first choice for the initial stage of R&D because of its heavy workload, long cycle, high cost, and limitations of the test site. A ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
Inventor 张俊智柳贵东何承坤
Owner TSINGHUA UNIV
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