Abstract
A new type insulation resistance on-line monitor has been designed for Hybrid Electric Vehicle (HEV). It is mainly composed of a proportional circuit and data sampling, processing module. The device detects insulation resistance by sampling DC bus voltage and voltage between positive line and chassis. The voltages sample is controlled by Electronically Controlled Unit (ECU). These voltages are isolated by opto-coupler Isolation amplifier and transmitted to ECU. The value of insulation resistance is calculated in ECU. The hardware circuit, software realization and insulation resistance calculation formula have been given. The device has been tested in laboratory, test results show the device can accurately and instantaneously detect all kinds of insulation condition, and give an alarm when the insulation is destroyed. The device do not need voltage and (or) current sensor, and use a high voltage switch to control sampling. So it reduces the cost and is convenient for engineering realization.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.