Electric vehicle motor deactivation for battery charging
AssigneeGM Global Technology Operations LLC
InventorsPeng Peng, Lei Hao, Suresh Gopalakrishnan
Life of this patent
Estimating the term…
Abstract
A battery charging system for an electric vehicle including an electric motor having a first stator winding having a variable number of poles, a second stator winding having a first fixed number of poles and a rotor winding having a second fixed number of poles, wherein the first fixed number of poles is not equal to the second fixed number of poles, wherein the variable number of poles is equal to the first fixed number of poles during a charging operation of the battery in response to the alternating current.
Claims20
An electric drive system comprising:
- a battery, wherein the battery is charged in response to a direct current (DC) current;
- an input for receiving an alternating current (AC) current from an external power source;
- a sensor for detecting a parameter of the AC current;
- an electric motor having a first stator winding having a variable number of poles, a second stator winding having a first fixed number of poles and a rotor having a second fixed number of poles, wherein the variable number of poles selects a pole number that is equal to the first fixed number of poles and the second fixed number of poles during a battery charging operation;
- an inverter for converting the AC current received from the first stator winding to the DC current in response to an inverter control signal;
- and
- an inverter controller for controlling the inverter in response to the parameter of the AC current such that the battery is charged in response to the DC current.
A method of controlling an electric drive system in an electric vehicle comprising:
- charging a battery in response to a direct current (DC) current;
- receiving, at a charging port, an alternating current (AC) current from an external power source;
- detecting, by a sensor, a parameter of the AC current;
- coupling the AC current to a second stator winding of an electric motor having a first stator winding having a variable number of poles, the second stator winding having a first fixed number of poles and a rotor winding having a second fixed number of poles, such that the AC current is coupled from the second stator winding to the first stator winding in response to an inductive coupling, and wherein the first fixed number of poles is not equal to the second fixed number of poles, wherein the variable number of poles is equal to the first fixed number of poles during a charging operation of the battery in response to the AC current;
- converting, by an inverter, the AC current received from the first stator winding to the DC current in response to an inverter control signal;
- and
- controlling, by an inverter controller, the inverter in response to the parameter of the AC current such that the battery is charged in response to the DC current.
An electric drive system for an electric vehicle comprising:
- a charge port for receiving an alternating current (AC) current from an external power source;
- a sensor for detecting a phase of the AC current;
- an electric motor having a first stator winding having a variable number of poles including sixteen poles and eight poles, a second stator winding having sixteen poles and a rotor winding having eight poles, and wherein the first stator winding is configured to have sixteen poles during a battery charging operation in response to the AC current and eight poles during a propulsion mode of the electric vehicle;
- an inverter for converting the AC current received from the first stator winding to a direct current (DC) current in response to an inverter control signal;
- an inverter controller for controlling the inverter in response to the phase of the AC current to generate the DC current;
- a transformer for transforming the DC current to a DC voltage;
- and
- a battery, wherein the battery is charged in response to the DC voltage.
Dependencies are inferred from the claim text.