Fault-tolerant control method of high-voltage power distribution system for distributed driving vehicle
A high-voltage power distribution and fault-tolerant control technology, which is applied to electric vehicles, electrical devices, control devices, etc., can solve problems such as fuse burnout and high current, and achieve the effects of improving reliability, improving safety, and avoiding burnout
Active Publication Date: 2019-10-29
北京中辰瑞通科技有限公司
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Problems solved by technology
For off-road vehicles, excessive current may occur under special working conditions, such as motor stall caused by climbing steps, resulting in overcurrent, which will cause the fuse to burn out
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[0031] The present invention will be further described below in conjunction with specific examples and accompanying drawings.
[0032] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a fault-tolerant control method for a high-voltage power distribution system for a distributed drive vehicle, characterized in that it includes the following steps:
[0033] S1. Collect the current of each branch in the high-voltage power distribution system in real time;
[0034] S2. Determine whether the current of each branch is greater than the preset safe current threshold, and disconnect the contactor if it is greater;
[0035] S3, such as figure 1 As shown, if the current of each branch at the current moment is within the safe current threshold, use the third-order exponential smoothing algorithm combined with the current of each branch at the current moment and the historical current value to calculate the current value after a c...
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The invention provides a fault-tolerant control method of a high-voltage power distribution system for a distributed driving vehicle. The method comprises the steps of collecting magnitudes of currents of all branches in the high-voltage power distribution system in real time; separately judging whether the currents of all the branches are larger than a preset safety current threshold value or not, and if yes, switching off contactors; if the currents of all the branches at the current moment are all within the safety current threshold value, utilizing a third-order exponential smoothing algorithm in combination with current and historical current values of all the branches at the current moment, calculating current values after a certain period of time in the future, judging whether the current values after a certain period of time in the future are larger than the safety current threshold value or not, and if yes, switching off contactors of the corresponding branches, and conductinglimp processing on the vehicle, wherein limp processing refers to the process that when the vehicle breaks down, faults are transmitted to a vehicle control unit according to the state of a power distribution cabinet, and fault-tolerant control is conducted according to an established control strategy. According to the fault-tolerant control method, through current prediction, a relay is switchedoff actively in advance, then limp processing is conducted, and the safety and reliability of the system can be improved.
Description
technical field [0001] The invention belongs to the technical field of distributed drive vehicles, and in particular relates to a fault-tolerant control method of a high-voltage power distribution system for distributed drive vehicles. Background technique [0002] With the increasing pollution of the global environment and the consumption of non-renewable energy such as petroleum, the development of electric vehicles has become an inevitable trend. Electric vehicles can be divided into centralized drive and distributed drive according to their driving methods. Compared with centralized drive, distributed drive has many advantages. Its biggest feature is the high integration of power, transmission and braking systems, which greatly simplifies the chassis structure and saves space in the car. In addition, various driving modes can be realized through independent control of each hub motor, such as front-wheel drive, rear-wheel drive, four-wheel drive, etc. Different driving m...
Claims
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Login to View More IPC IPC(8): B60W50/029B60L3/00
CPCB60L3/0023B60L3/0046B60W50/029B60W2050/0292
Inventor 付翔裴彪袁跃旭何宗权汪孟杰吴森
Owner 北京中辰瑞通科技有限公司