CN-121989734-A - System and method for motor-based power transfer

CN121989734ACN 121989734 ACN121989734 ACN 121989734ACN-121989734-A

Abstract

The present disclosure relates to systems and methods for motor-based power transfer. The power transfer system includes a traction battery pack, a power inverter module configured to be in electrical communication with the traction battery pack, and a rotating electrical machine. The rotary electric machine is in electrical communication with the ac bus and includes a first set of windings in electrical communication with the ac bus and a second set of windings in electrical communication with the output ac bus. The power outlet is in electrical communication with the second set of windings via an output ac bus. The controller is in electrical communication with the power inverter module. The controller is configured to selectively direct the power inverter module to direct ac to the rotating electrical machine over the ac bus to produce a desired output power at the electrical outlet.

Inventors

PENG PENG
HAO LEI
T.W.NEIL
S. Gopalak Richnan
R. A. Torres

Assignees

通用汽车环球科技运作有限责任公司

Dates

Publication Date: 20260508
Application Date: 20241231
Priority Date: 20241104

Claims (10)

1. A power transfer system, comprising: Traction battery pack; A power inverter module configured to receive high voltage direct current from the traction battery pack and to convert the high voltage direct current to alternating current, the alternating current configured to be received by an alternating current bus; A rotary electric machine in electrical communication with the ac bus, wherein the rotary electric machine is a segmented winding machine and includes a first set of windings in electrical communication with the ac bus and a second set of windings in electrical communication with an output ac bus; A power outlet in electrical communication with the second set of windings via the output ac bus, and A controller in electrical communication with the power inverter module, wherein the controller is configured to: The power inverter module is selectively directed to direct the ac to the rotating electrical machine over the ac bus to produce a desired output power at the electrical outlet.
2. The power transfer system of claim 1, wherein the first set of windings is low turn windings and the second set of windings is high turn windings.
3. The power transfer system of claim 1, wherein the first set of windings is positioned radially inward from the second set of windings in a stator of the rotating electrical machine relative to a rotational axis of a rotor in the rotating electrical machine.
4. The power transfer system of claim 3, wherein the second set of windings comprises three sets of windings, each set of windings having a corresponding output in electrical communication with the output ac bus.
5. The power transfer system of claim 4, wherein a single one of the three sets of windings is selectively connectable to the electrical outlet by a switch for providing one of three-phase alternating current or single-phase alternating current to the electrical outlet.
6. The power transfer system of claim 4, wherein the desired output power comprises three-phase alternating current and the controller is configured to disengage a driveline from the rotating electrical machine.
7. The power transfer system of claim 6, wherein the rotor is an octal rotor and the controller is configured to direct the rotating electric machine to rotate the rotor at 900 RPM.
8. The power transfer system of claim 6, wherein the rotor is a six-pole rotor and the controller is configured to direct the rotating electric machine to rotate the rotor at 1200 RPM.
9. The power transfer system of claim 1, wherein the desired output power comprises single phase alternating current and the second set of windings comprises two sets of windings.
10. The power transfer system of claim 1, wherein the second set of windings comprises 8 to 10 times the number of turns of the first set of windings.

Description

System and method for motor-based power transfer Technical Field The present disclosure relates to the field of power transfer, and in particular to systems and methods for motor-based power transfer. Background With advances in battery technology and capacity, full-electric or hybrid-electric vehicles are capable of achieving a greater range. Some batteries, such as traction batteries, provide power in the form of direct current ("DC"). DC power from the traction battery can be converted to alternating current ("AC") by a power module to drive a traction motor or operate another portion of the vehicle. Because traction batteries are capable of storing large amounts of power, it can be beneficial to use a portion of this power for purposes other than propulsion. For example, a user of a vehicle may want to power small electronic devices while in a remote area, power a home during a power outage, or power the grid directly. In one example, to convert DC power from the traction battery to power that can be used by other sources, a second power module is linked to the traction battery, separate from the power module used to drive the traction motor. Disclosure of Invention A power transfer system is disclosed herein. The system includes a traction battery pack, a power inverter module configured to receive high voltage direct current from the traction battery pack and convert the high voltage direct current to alternating current, the alternating current configured to be received by an alternating current bus, and a rotating electric machine. The rotary electric machine is in electrical communication with the ac bus and is a segmented winding machine that includes a first set of windings in electrical communication with the ac bus and a second set of windings in electrical communication with the output ac bus. The power outlet is in electrical communication with the second set of windings via an output ac bus. The controller is in electrical communication with the power inverter module. The controller is configured to selectively direct the power inverter module to direct ac to the rotating electrical machine over the ac bus to produce a desired output power at the electrical outlet. In one aspect of the disclosure, the first set of windings is low turn windings and the second set of windings is high turn windings. In one aspect of the disclosure, the first set of windings is positioned radially inward from the second set of windings in a stator of the rotary electric machine relative to a rotational axis of a rotor in the rotary electric machine. In one aspect of the disclosure, the second set of windings includes three sets of windings, each set of windings having a corresponding output in electrical communication with the output ac bus. In one aspect of the disclosure, a single one of the three sets of windings is selectively connectable to the power outlet by a switch for providing one of three-phase alternating current or single-phase alternating current to the power outlet. In one aspect of the disclosure, the desired output power comprises three-phase alternating current, and the controller is configured to disengage the transmission from the rotating electrical machine. In one aspect of the disclosure, the rotor is an octal rotor, and the controller is configured to direct the rotating electrical machine to rotate the rotor at 900 RPM. In one aspect of the disclosure, the rotor is a six-pole rotor and the controller is configured to direct the rotating electrical machine to rotate the rotor at 1200 RPM. In one aspect of the disclosure, the desired output power comprises single phase alternating current and the second set of windings comprises two sets of windings. In one aspect of the disclosure, the second set of windings comprises 8 to 10 times the number of turns of the first set of windings. A method of performing power transfer is disclosed herein. The method includes directing a power inverter module to convert direct current from a traction battery pack from a direct current bus to three-phase alternating current received by an alternating current bus. The method also includes directing the three-phase alternating current into a rotating electrical machine. The rotary electric machine is a segmented winding machine and includes a first set of windings in electrical communication with the ac bus and a second set of windings in electrical communication with the output ac bus. The method further includes directing the ac generated in the second set of windings to an electrical outlet via the output ac bus. In one aspect of the disclosure, the first set of windings is low turn windings and the second set of windings is high turn windings, and the first set of windings is positioned radially inward from the second set of windings. In one aspect of the disclosure, the second set of windings includes three sets of windings configured to provide three-phase ac from the second set of windings to the outp