Alternating current zero torque resistance heating
AssigneeGM Global Technology Operations LLC
InventorsRenato Amorim Torres, Lei Hao, Suresh Gopalakrishnan, Chandra S. Namuduri, Dongxu Li
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Abstract
A method and apparatus for heating a battery pack in an electrified vehicle provides a zero d-axis current command and a zero q-axis current command to a field-oriented controller for an alternating current (AC) motor coupled to the battery pack through a power inverter module controlled by the field-oriented controller. An AC signal is injected onto the d-axis of the field-oriented controller resulting in an AC current through the battery pack effecting AC resistance heating.
Claims20
A method for heating a battery pack in an electrified vehicle, comprising:
- providing a zero d-axis current command and a zero q-axis current command to a field-oriented controller for an alternating current (AC) motor coupled to the battery pack through a power inverter module controlled by the field-oriented controller;
- and
- injecting an AC signal onto the d-axis of the field-oriented controller.
An apparatus for heating a battery pack in an electrified vehicle, comprising:
- an alternating current (AC) motor coupled to the battery pack through a power inverter module;
- and
- a field-oriented controller controlling the AC motor based upon a zero d-axis current command and a zero q-axis current command and an AC signal injected onto the d-axis of the field-oriented controller.
An electrified vehicle, comprising:
- a rechargeable energy storage system including a battery pack;
- an electric drive unit including a three-phase alternating current motor having a stator including three phase windings and a rotor, a traction power inverter module coupling the battery pack via a direct current (DC) link to the three-phase alternating current motor, a motor controller, and a gearbox mechanically coupling a rotor shaft of the rotor to at least one mechanical output;
- at least one wheel mechanically coupled to the at least one mechanical output of the gearbox;
- and
- the motor controller including a field-oriented controller controlling the three-phase alternating current motor based upon a zero d-axis current command and a zero q-axis current command, the motor controller further including an alternating current signal injected onto the zero d-axis current command effective to produce an perturbation on the DC link effecting an alternating current through the battery pack.
Dependencies are inferred from the claim text.