Method for operating an electric generator/motor system
AssigneeDaimlerChrysler AG
InventorsJuergen Lang, Conrad Roessel
Life of this patent
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Abstract
A method of operating an electric three-phase machine with a polyphase winding arrangement in a vehicle. The phases of the winding arrangement are connected to a vehicle network with the aid of power converters and the winding arrangements are interconnected in a first method of connection for motor operation and interconnected in a second method of connection for generator operation. Switching over from one method of connection to the other is performed at an instant at which the three-phase machine changes from the state of picking up torque to outputting torque, or from the state of outputting torque to picking up torque.
Claims12
A method for operating an electric three-phase machine with a polyphase winding arrangement in a vehicle, wherein the phases of the winding arrangement are connected to a vehicle network by power converters, said method comprising the steps of:
- interconnecting the winding arrangements in a star method of connection for motor operation of said three-phase machine;
- interconnecting said winding arrangements in a delta method of connection for generator operation of said three-phase machine;
- measuring a torque output of said electric three-phase machine;
- switching from one of said star connection and said delta connection to another one of said star connection and said delta connection when said measured torque is zero during operation of said three-phase machine.
A method for operating an electric three-phase machine with a power phase winding arrangement in a vehicle, the phases of the winding arrangement being connected to a vehicle network with the aide of power converters, the winding arrangements being connected in a first, star method of connection for motor operation and being connected in a second, delta method of connection for generator operation, said method comprising the steps of:
- switching over from star to delta connection or from delta to star connection when a torque is zero.
Dependencies are inferred from the claim text.