Abstract
Currently, the voltages of power supply on electric vehicle are far higher than the level that people can endure. Aiming at the high voltage safety of electric vehicle, a solution based on FPGA is introduced, which gives a real time detection for creepage of power supply and person's getting an electric shock on electric vehicle, and which cuts off the power supply immediately when the danger is detected. In the solution, a kind of voltage-sampling circuit is provided for the power supply on electric vehicle while the device of FPGA is used to count the insulated resistance to ground of power supply and control the switches. Using FPGA to realize the controlling function in place of MCU can increase the speed and stability of system. The result of experiment indicates that, applied on electric vehicle, this solution takes effect on the detection and protection for the creepage of power supply and person's getting an electric shock.
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