Current sensor compensation
AssigneeRivian IP Holdings, LLC
InventorsMohammad Nanda Rahmana Marwali, Yanjun Shi, Zahra Mohajerani, Vishnu Mohan
Life of this patent
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Abstract
Current sensor compensation is provided. A system can include a charger for an electric vehicle having one or more controllers. A controller can amplify an input signal at a selected frequency to generate a first signal. A controller can amplify a direct current component of the input signal to generate a second signal. A component of the charger can generate a reference signal for input into a current sensor of the charger. The reference signal can be based on a combination of the first signal and the second signal.
Claims20
A system to convert alternating current (AC) power to direct current (DC) power to charge an electric vehicle, comprising:
- one or more voltage controllers of a charger, the one or more voltage controllers configured to amplify an input signal at a selected frequency to generate a first signal, and to amplify a direct current component of the input signal to generate a second signal;
- and
- a component of the charger configured to generate, based at least in part on a combination of the first signal and the second signal, a first reference signal for input into one or more current controllers of the charger;
- and
- one or more current sensors to generate a second reference signal for input into the one or more current controllers based on a value of current of an AC input current into the charger;
- and wherein
- the input signal comprises a voltage of a DC link of the charger.
A method, comprising:
- amplifying, by one or more voltage controllers of a charger for an electric vehicle, an input signal at a selected frequency to generate a first signal;
- amplifying, by the one or more voltage controllers, a direct current component of the input signal to generate a second signal;
- generating, by a component of the charger, based at least in part on a combination of the first signal and the second signal, a first reference signal for input into one or more current controllers of the charger;
- and
- generating, by one or more current sensors, a second reference signal for input into the one or more current controllers;
- and wherein
- the input signal is a voltage of a DC link of the charger.
A system, comprising:
- a charger for an electric vehicle, the charger comprising:
- a first voltage controller to convert an input power signal to a first output power signal with a gain greater than 1 at a selected frequency;
- a second voltage controller to convert a direct current component of the input power signal to a second output power signal with a gain greater than 1;
- a combiner to combine the first output power signal with the second output power signal to generate a third output power signal to provide a first reference signal for input into one or more current controllers of the charger;
- and
- a current transformer to generate a second reference signal for input into the one or more current controllers.
Dependencies are inferred from the claim text.