Background:
The power performance of an electric vehicle is the basic parameter. Traditional
test equipment, such as the expensive chassis dynamometer, not only increases the cost of testing
but also makes it impossible to measure all the performance parameters of an electric vehicle.
Objective:
A set of convenient, efficient and sensitive power measurement system for electric vehicles
is developed to obtain the real-time power changes of hub-motor vehicles under various operating conditions,
and the dynamic performance parameters of hub-motor vehicles are obtained through the system.
Methods:
Firstly, a set of on-board power test system is developed by using virtual instrument (Lab-
VIEW). This test system can obtain the power changes of hub-motor vehicles under various operating
conditions in real-time and save data in real-time. Then, the driving resistance of hub-motor vehicles is
analyzed, and the power performance of hub-motor vehicles is studied in depth. The power testing system
is proposed to test the input power of both ends of the driving motor, and the chassis dynamometer
is combined to test so that the output efficiency of the driving motor can be easily obtained without
disassembly. Finally, this method is used to carry out the road test and obtain the vehicle dynamic performance
parameters.
Results:
The real-time current, voltage and power, maximum power, acceleration time and maximum
speed of the vehicle can be obtained accurately by using the power test system in the real road experiment.
Conclusion:
The maximum power required by the two motors reaches about 9KW, and it takes
about 20 seconds to reach the maximum speed. The total power required to maintain the maximum
speed is about 7.8kw, and the maximum speed is 62km/h. In this article, various patents have been discussed.
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