Method for managing overcurrent protection in a self-controlled synchronous machine with permanent magnets of a motor vehicle
AssigneeVitesco Technologies GmbH
InventorsMichel Aussel, Karim Boukhris
Life of this patent
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Abstract
A method for managing overcurrent protection in a self-controlled permanent-magnet synchronous motor of a motor vehicle is disclosed. The method makes it possible to adjust the activation threshold for overcurrent protection in the synchronous motor. In particular, the activation threshold is variable and depends, inter alia, on parameters representative of the temperature of the components of the synchronous motor.
Claims20
A method for managing overcurrent protection in a self-controlled permanent-magnet synchronous motor of a motor vehicle, said self-controlled permanent-magnet synchronous motor including an electric motor and an electronic control system for said electric motor, said motor vehicle including a heat transfer fluid-based cooling system configured to cool components of said electronic control system and said electric motor, said method, carried out by a synchronous motor controller for the self-controlled permanent-magnet synchronous motor, the method comprising:
- receiving external measurement data comprising data representative of a temperature of a heat transfer fluid of the heat transfer fluid-based cooling system;
- receiving internal measurement data comprising information representative of a state of the electronic control system and a state of the electric motor;
- determining a limit current value based on both the internal measurement data and the external measurement data;
- receiving a value representative of a control current for the self-controlled permanent-magnet synchronous motor;
- and
- only when the value representative of the control current is greater than the limit current value:
- activating an overcurrent protection method to cut the power supply of the electronic control system.
A controller for a self-controlled permanent-magnet synchronous motor comprising:
- at least one processor configured to:
- receive external measurement data comprising data representative of a temperature of a heat transfer fluid of a heat transfer fluid-based cooling system configured to cool components of an electronic control system for an electric motor and the electric motor,
- receive internal measurement data comprising information representative of a state of the electronic control system and the electric motor,
- determine a limit current value based on both the internal measurement data and the external measurement data,
- receive a value representative of a control current for the self-controlled permanent-magnet synchronous motor, and
- only when the value representative of the control current is greater than the limit current value:
- activate an overcurrent protection method to cut the power supply of the electronic control system.
A self-controlled permanent-magnet synchronous motor comprising:
- an electric motor comprising a plurality of electric motor components;
- an electronic control system configured to control the electric motor, the electronic control system comprising a plurality of electronic control system components;
- and
- a controller comprising:
- at least one processor configured to:
- receive external measurement data comprising data representative of a temperature of a heat transfer fluid of a heat transfer fluid-based cooling system configured to cool the electronic control system components of the electronic control system and the electric motor components of the electric motor,
- receive internal measurement data comprising information representative of a state of the electronic control system and the electric motor,
- determine a limit current value based on both the internal measurement data and the external measurement data,
- receive a value representative of a control current for the self-controlled permanent-magnet synchronous motor, and
- only when the value representative of the control current is greater than the limit current value:
- activate an overcurrent protection method to cut the power supply of the electronic control system.
Dependencies are inferred from the claim text.