ISOLATION MONITORING SYSTEM AND METHOD UTILIZING A VARIABLE EMULATED INDUCTANCE
First Claim
1. A system for measuring leakage resistance between a high voltage (HV) system of a vehicle and a vehicle chassis, comprising:
- an emulated inductance that is connected between the HV system and the vehicle chassis and that has an inductive reactance that substantially cancels a capacitive reactance between the HV system and the vehicle chassis;
a signal source that outputs one of an AC current signal and an AC voltage signal between the HV system and the vehicle chassis; and
a sensor that measures one of;
an AC current response to the AC voltage signal between the HV system and the vehicle chassis; and
an AC voltage response to the AC current signal between the HV system and the vehicle chassis.
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Accused Products
Abstract
A system for measuring leakage resistance between a high voltage (HV) system of a vehicle and a vehicle chassis includes an emulated inductance that is connected between the HV system and the vehicle chassis and that has an inductive reactance that substantially cancels a capacitive reactance between the HV system and the vehicle chassis. A signal source outputs one of an AC current signal and an AC voltage signal between the HV system and the vehicle chassis. A sensor measures one of an AC current response to the AC voltage signal between the HV system and the vehicle chassis and an AC voltage response to the AC current signal between the HV system and the vehicle chassis.
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Citations
22 Claims
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1. A system for measuring leakage resistance between a high voltage (HV) system of a vehicle and a vehicle chassis, comprising:
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an emulated inductance that is connected between the HV system and the vehicle chassis and that has an inductive reactance that substantially cancels a capacitive reactance between the HV system and the vehicle chassis; a signal source that outputs one of an AC current signal and an AC voltage signal between the HV system and the vehicle chassis; and a sensor that measures one of; an AC current response to the AC voltage signal between the HV system and the vehicle chassis; and an AC voltage response to the AC current signal between the HV system and the vehicle chassis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for measuring leakage resistance between a high voltage (HV) system of a vehicle and a vehicle chassis, comprising:
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generating an emulated inductance between the HV system and the vehicle chassis; substantially cancelling a capacitive reactance between the HV system and the vehicle chassis using inductive reactance of the emulated inductance; generating one of an AC current signal and an AC voltage signal between the HV system and the vehicle chassis; and measuring one of; an AC current response to the AC voltage signal between the HV system and the vehicle chassis; and an AC voltage response to the AC current signal between the HV system and the vehicle chassis. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification