Insulation monitoring device and method for new energy vehicle alternating current wiring harness
An insulation monitoring device, a technology for new energy vehicles, applied in measurement devices, testing electrical devices in transportation, high resistance measurement, etc. , to achieve the effect of high cost performance, enhanced stability and reliability, and low price
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[0017] The present invention will be further described below in conjunction with accompanying drawing.
[0018] Such as figure 1 The shown insulation monitoring device for the AC wiring harness of a new energy vehicle includes an isolated power supply module 3, a first linear optocoupler 1, a second linear optocoupler 2, a first signal conditioning module 7, a second signal conditioning module 4, and an AD conversion module 6 and DSP module 5.
[0019] The isolated power supply module 3 is mainly used to provide power for the AC wiring harness L and the AC wiring harness N to collect the insulation resistance of the car body, and to isolate the control circuit of the bidirectional on-board charger, so as to prevent the output AC from burning the control circuit of the two-way on-board charger , and can avoid the impact of AC on the DC control circuit. In this embodiment, the insulation resistance of the AC wiring harness L to the vehicle body is connected to the resistance R...
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