Back to results
US 6,617,820 B2Granted
Auxiliary power conversion by phase-controlled rectification
AssigneeGeneral Motors Corporation
InventorsDouglas S. Carlson, Constantin C. Stancu, James M. Nagashima, Silva Hiti, Khwaja M. Rahman
Life of this patent
Estimating the term…
Abstract
A method of generating low voltage auxiliary power forms for electric or hybrid vehicle use by tapping power from the traction motor primary winding with a secondary winding and rectifier.
Claims21
A power control system for an electric vehicle comprising:
- an electric fraction motor;
- a first winding included in said electric traction motor for energizing said electric traction motor to rotate said electric traction motor;
- at least one inverter for providing conditioned electrical power to the electric traction motor;
- a DC source electrically coupled to said at least one inverter;
- a second winding included in said electric traction motor for providing a voltage source in the vehicle;
- a rectifier electrically coupled to said second winding to rectify said voltage source to provide a voltage output usable by accessories in the electric vehicle;
- and
- a controller, said controller controlling said rectifier in response to said output voltage.
5 more elements
A power control system for generating a plurality of voltages in an electric motor:
- a first winding included in said electric motor for providing a first voltage source for energizing the electric motor to rotate the electric traction motor;
- at least one inverter for providing time-varying electrical power to the electric motor;
- a DC electrical power source electrically coupled to said at least one inverter
- a second winding included in the electric motor for providing a second voltage source in the electric motor;
- a rectifier electrically coupled to said second winding;
- and
- a controller to provide closed loop control for said rectifier based on said voltage feedback.
4 more elements
The power control system of 10 wherein said first voltage source is a three-phase high voltage source.
A method of generating a plurality of voltages for the operation of an electric traction motor in a vehicle comprising:
- providing a first set of windings in the electric traction motor;
- providing a second set of winding in the electric traction motor;
- providing an inverter electrically coupled to the electric fraction motor providing a time-varying output current to the electric traction motor;
- providing a voltage rectifier electrically coupled to said second set of winding;
- generating a first time-varying magnetic field with the first set of windings to rotate the electric traction motor in response to the time -varying output current of the inverter;
- generating a time-varying current with the second set of windings in the electric traction motor in response to the output of the inverter;
- detecting the voltage output by the rectifier;
- and
- controlling the rectifier in closed loop fashion with the detected voltage used as feedback.
6 more elements
A method of generating a plurality of voltages for the operation of an electric traction motor in a Vehicle comprising:
- providing a first set of windings in the electric traction motor;
- providing a second set of winding in the electric traction motor;
- providing an inverter electrically coupled to the electric traction motor providing a time-varying output current to the electric traction motor;
- providing a voltage rectifier electrically coupled to said second set of windings;
- generating a first time-varying magnetic field with the first set of windings to rotate the electric traction motor in response to the time-varying output current of the inverter;
- generating a time-varying current with the second set of windings in the electric traction motor in response to the output of the inverter;
- compensating for a low motor RPM condition by superimposing a high frequency signal on a motoring frequency on the output of the inverter;
- rectifying the second time-varying current with the voltage rectifier.
5 more elements
A method of generating a plurality of voltages for the operation of an electric traction motor in a vehicle comprising:
- providing a first set of windings in the electric traction motor;
- providing a second set of winding in the electric traction motor;
- providing an inverter electrically coupled to the electric traction motor providing a time-varying output current to the electric traction motor;
- providing a voltage rectifier electrically coupled to said second set of windings;
- generating a first motoring frequency with the inverter to drive the electric fraction motor;
- generating a second frequency that does not substantially effect the torque of the electric traction motor superimposed on the first motoring frequency;
- generating a first time-varying magnetic field with the first set of windings to rotate the electric traction motor in response to the time-varying output current of the inverter;
- generating a time-varying current with the second set of windings in the electric traction motor in response to the output of the inverter;
- rectifying the second time-varying current with the voltage rectifier.
6 more elements
A method of generating a plurality of voltages for the operation of an electric traction motor in a vehicle comprising:
- providing a first set of windings in the electric traction motor;
- providing a second set of winding in the electric traction motor;
- providing a controller with executable software;
- providing an inverter electrically coupled to the electric traction motor providing a time-varying output current to the electric fraction motor;
- providing a voltage rectifier electrically coupled to said second set of windings;
- generating a first time-varying magnetic field with the first set of windings to rotate the electric traction motor in response to the time-varying output current of the inverter;
- generating a time-varying current with the second set of windings in the electric traction motor in response to the output of the inverter;
- rectifying the second time-varying current with the voltage rectifier under control of the software.
5 more elements
Dependencies are inferred from the claim text.