Back to results
US 12,583,344 B1Granted
Electric vehicle dual use inverter
AssigneeGM Global Technology Operations LLC
InventorsVaroun Perumal, Khorshed Mohammed Alam, Ajay Mehta, Muhammad Ahsan Zahid, Mazharul Chowdhury, Minh-Khai Nguyen
Life of this patent
Estimating the term…
Abstract
A battery charging system for an electric vehicle including a dual use direct current to direct current converter including a direct current to alternating current converter and a transformer for generating a rotor winding current in response to a first direct current in a propulsion mode and for generating a charging current in response to a charging mode.
Claims20
An electric vehicle propulsion system comprising:
- a battery to provide a direct current propulsion current and wherein the battery is charged in response to a charging direct current;
- an electric motor having a first stator winding and a first rotor winding;
- an input for receiving a first alternating current from an external power source and for coupling the first alternating current to the first stator winding;
- an inverter for converting the first alternating current received from the first stator winding during a charging mode to a second direct current in response to an inverter control signal and for generating an alternating stator drive current in response to the direct current propulsion current and for coupling the alternating stator drive current to the first stator winding during a propulsion mode;
- a direct current to direct current converter for converting the second direct current to the charging direct current in the charging mode, wherein the direct current to direct current converter includes a first direct current to alternating current converter for converting the second direct current to a first intermediate alternating current, a transformer for generating a second intermediate alternating current in response to the first intermediate alternating current, and an alternating current to direct current converter for converting the second intermediate alternating current to the direct current charging current, wherein, during the propulsion mode, the direct current to direct current converter is further operative to receive the direct current propulsion current from the battery, to decouple the alternating current to direct current converter from the transformer, to couple the first rotor winding to the transformer, to generate a third intermediate alternating current using first direct current to alternating current converter, to generating an alternating rotor drive current using the transformer in response to the third intermediate alternating current, and to couple the alternating rotor drive current to the first rotor winding;
- and
- a controller for controlling the inverter and the direct current to direct current converter such that a rotational force is generated in the electric motor in response to a first magnetic field generated in response to the alternating stator drive current in the first stator winding and the alternating rotor drive current in the first rotor winding.
4 more elements
A method of controlling a direct current to direct current converter in an electric vehicle propulsion system comprising:
- converting, by a direct current to alternating current converter, a first direct current to a first alternating current and for coupling the first alternating current to a transformer;
- generating, by the transformer, a second alternating current in response to the first alternating current and for coupling the second alternating current to a switch;
- converting, by an alternating current to direct current converter, the second alternating current, received from the switch, to a charging direct current, and for coupling the charging direct current to a battery;
- generating, by a rotor winding, a magnetic field within an electric motor in response to the second alternating current received from the switch, such that a rotational force is generated within the electric motor;
- and
- coupling, by the switch, the second alternating current to the alternating current to direct current converter and for isolating the transformer from the rotor winding in response to the electric vehicle propulsion system being in a charging mode;
- and
- coupling, by the switch, the second alternating current to the rotor winding and isolating the transformer from the alternating current to direct current converter in response to the electric vehicle propulsion system being in a propulsion mode.
5 more elements
A direct current to direct current converter for use in an electric vehicle propulsion system comprising:
- a direct current to alternating current converter for receiving a first direct current, for converting the first direct current to a first alternating current and for coupling the first alternating current to a transformer;
- the transformer for receiving the first alternating current, for generating a second alternating current in response to the first alternating current and for coupling the second alternating current to a switch;
- an alternating current to direct current converter for receiving the second alternating current from the switch, converting the second alternating current to a charging direct current, and for coupling the charging direct current to a battery;
- a rotor winding for receiving the second alternating current, and for generating a magnetic field within an electric motor in response to the second alternating current such that a rotational force is generated within the electric motor;
- and
- the switch for coupling the second alternating current to the alternating current to direct current converter and for isolating the transformer from the rotor winding in response to the electric vehicle propulsion system being in a charging mode and for coupling the second alternating current to the rotor winding and isolating the transformer from the alternating current to direct current converter in response to the electric vehicle propulsion system being in a propulsion mode.
3 more elements
Dependencies are inferred from the claim text.