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AssigneeHyundai Mobis Co., Ltd.
InventorSang Min KIM
Estimating the term…
An apparatus for reducing a temperature influence in measuring a switching current based on stray inductance. The apparatus includes a current detector configured to output a voltage derived from a differential component of a current so as to detect a switching current of a power module, a filter configured to filter the voltage output from the current detector, an integrator configured to integrate a voltage output from the filter, an ADC configured to convert an analog voltage output from the integrator into a digital voltage and sample the digital voltage, a scaler configured to convert a sampled integrator output value output from the ADC into a scaled current value, and a compensator configured to remove a temperature dependent DCR effect from the scaled current value.
An apparatus, comprising:
A method, comprising:
The method of 10, further comprising performing resetting such that an integral value is not accumulated when an integration operation is performed.
The method of 10, wherein the compensating is performed by a software algorithm using parameters for compensating for a current variation flowing in stray inductance and stray resistance, a filtered current variation of an Rs error component and a current variation of an inverter resistor-inductor (RL) circuit, and the Rs error component to remove a stray resistance component from the switching current.
Dependencies are inferred from the claim text.