Method and device for temperature limitation according to current and/or voltage
AssigneeRobert Bosch GmbH
InventorHarald Eisenhardt
Life of this patent
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Abstract
The invention relates to a method for temperature limitation according to the current and/or voltage, for an actuating device (10) associated with an electric motor (M), especially a fan regulator (12) of a motor vehicle, the temperature limitation being carried out according to at least one operating parameter of the motor (M). The invention also relates to a corresponding device (1) and a fan regulator (12).
Claims10
A method for temperature limitation according to at least one of an operating current (I) and a supply voltage (U), for an actuating device (10) assigned to an electric motor (M), wherein the temperature limitation is carried out as a function of at least one operating parameter of the motor (M), comprising steps of:
- monitoring at least one of the operating current (I) and the supply voltage (U);
- and
- reducing a maximum value (Tmax) of a permissible temperature of the actuating device (10) when the operating current (I) rises above a specified threshold current value (Is) or when the supply voltage (U) rises above a specified threshold voltage value (Us).
A device (1) for temperature limitation according to at least one of an operating current (I) and a supply voltage (U), for an actuating device (10) assigned to an electric motor (M), comprising:
- an electrical switching device (14) that carries out the temperature limitation as a function of at least one operating parameter of the motor (M), comprising a temperature controller (20) with an amplifier (22) configured for generating an output signal (24);
- and
- a power semiconductor element (26) that influences actuation of the motor (M) in response to the output signal (24);
- wherein a maximum value (Tmax) of a permissible temperature of the actuating device (10) is reduced when the operating current (I) rises above a specified threshold current value (Is) or the supply voltage (U) rises above a specified threshold voltage value (Us).
Dependencies are inferred from the claim text.