Electric Drive System and Energy Management Method
First Claim
1. An electric drive system for a vehicle, comprising:
- an energy storage system (ESS);
a power conversion system coupled to the ESS;
a first AC motor coupled to the power conversion system;
a second AC motor coupled to the power conversion system;
a power split device coupled between the first and second AC motors and a load of the vehicle, the power split device comprising an arrangement of gears for processing mechanical torque provided by the AC motors or load; and
an energy management system (EMS) configured to selectively;
enable both the first and second AC motors to provide a first mechanical torque to the load through the power split device to drive the vehicle; and
enable the first AC motor to provide a second mechanical torque to the load through the power split device to drive the vehicle, and enable the second AC motor to operate as a generator to receive a third mechanical torque from the power split device to generate electrical power.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric drive system includes an energy storage system (ESS), a power conversion system, and an alternating current (AC) traction system. The ESS provides or receives electric power, The ESS includes a first energy storage unit and a second energy storage unit. The power conversion system is electrically coupled to the ESS for converting an input power to an output power. The AC traction system is electrically coupled to the power conversion system for converting the output power of the power conversion system to mechanical torques. The AC traction system includes a first AC drive device and a second AC drive device. An energy management system (EMS) is in electrical communication with the ESS, the AC traction system, and the power conversion system for providing control signals.
58 Citations
28 Claims
-
1. An electric drive system for a vehicle, comprising:
-
an energy storage system (ESS); a power conversion system coupled to the ESS; a first AC motor coupled to the power conversion system; a second AC motor coupled to the power conversion system; a power split device coupled between the first and second AC motors and a load of the vehicle, the power split device comprising an arrangement of gears for processing mechanical torque provided by the AC motors or load; and an energy management system (EMS) configured to selectively; enable both the first and second AC motors to provide a first mechanical torque to the load through the power split device to drive the vehicle; and enable the first AC motor to provide a second mechanical torque to the load through the power split device to drive the vehicle, and enable the second AC motor to operate as a generator to receive a third mechanical torque from the power split device to generate electrical power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 22, 23)
-
-
14. An electric drive system for a vehicle, comprising:
-
an energy storage unit; a power conversion device coupled to the energy storage unit; a traction system coupled to the power conversion device, the traction system comprising; a first motor/generator coupled to the power conversion device; and a second motor/generator coupled to the power conversion device; a power split device coupled between the first motor/generator, the second motor/generator, and a load of the vehicle, the power split device comprising an arrangement of gears for processing mechanical torque provided by the motor/generators or load; and an energy management system (EMS) configured to selectively; enable both the first motor/generator and second motor/generator to operate as motors to provide a first mechanical torque to the load through the power split device to drive the vehicle during a first mode of operation; and enable the first motor/generator to operate as a motor to provide a second mechanical torque to the load through the power split device to drive the vehicle, and enable the second motor/generator to operate as a generator to receive a third mechanical torque from the power split device to generate electrical power, during a second mode of operation. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
-
21. An electric drive system for a vehicle, comprising:
-
an energy storage system (ESS); a power conversion system coupled to the ESS; a first AC motor coupled to the power conversion system; a second AC motor coupled to the power conversion system; a transmission device coupled to the first AC motor for processing mechanical torque; a power split device coupled between the transmission device, second AC motor, and a load of the vehicle, the power split device comprising an arrangement of gears for processing mechanical torque provided by the transmission device, second AC motor, or load; and an energy management system (EMS) configured to selectively; enable both the first and second AC motors to provide a first mechanical torque to the load through the transmission device and power split device to drive the vehicle; and enable the first AC motor to provide a second mechanical torque to the load through the transmission device and power split device to drive the vehicle, and enable the second AC motor to operate as a generator to receive a third mechanical torque from the power split device to generate electrical power. - View Dependent Claims (24, 25, 26, 27, 28)
-
Specification