Electric drive system, power train, vehicle, and method of operating an electric drive system
AssigneeSiemens Mobility GmbH
InventorsChristoph Adam, Matthias Corduan, Olaf Körner
Life of this patent
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Abstract
An electric drive system for a vehicle, such as a rail vehicle, has a plurality of different drive motors. The motors include at least one permanently excited motor as a drive and at least one further motor selected from the group of asynchronous motor and reluctance motor as a drive motor. The permanently excited motor is powered by an inverter whose power semiconductor has a greater band gap than silicon, and the further motor which is selected from the group of asynchronous motor and reluctance motor is powered by an Si inverter.
Claims9
An electric drive system for a rail vehicle, the drive system comprising:
- a plurality of drive motors, including at least one permanently excited motor and at least one further motor selected from the group consisting of an asynchronous motor and a reluctance motor;
- an inverter for powering said permanently excited motor, said inverter having a power semiconductor with a band gap wider than a band gap of silicon;
- and
- an Si inverter for powering said further motor selected from the group consisting of the asynchronous motor and the reluctance motor;
- wherein a power distribution of the drive motors is set as a function of at least one parameter selected from the group consisting of an anticipated route parameter, and environmental parameter, and an operating parameter;
- and
- wherein a power delivered by said permanently excited motor in full-load operation amounts to between 100% and 150% relative to a power delivered by said further motor selected from the group consisting of said asynchronous motor and said reluctance motor.
A method of operating an electric drive system having a plurality of drive motors, the method comprising:
- providing the drive system with at least one permanently excited motor as a drive motor and at least one further motor selected from the group consisting of an asynchronous motor and a reluctance motor as a drive motor;
- powering the drive motors of the drive system with respective inverter;
- and
- powering the permanently excited motor by an inverter having a power semiconductor with a band gap that is greater than a band gap of silicon and powering the further motor selected from the group consisting of the asynchronous motor and the reluctance motor by an Si-based inverter;
- and
- operating the drive system such that a power delivered by the permanently excited motor in full-load operation lies in a power range from 100% to 150% relative to a power delivered by the further motor selected from the group consisting of the asynchronous motor and the reluctance motor.
Dependencies are inferred from the claim text.