Method and device for charging a capacitive element
AssigneeRobert Bosch GmbH
InventorsStefan Fuchs, Marco Graf
Life of this patent
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Abstract
A method and device for charging and/or discharging a capacitive element. A controllable switch is driven to interrupt the charging current when the charging current exceeds a predetermined charging-current threshold. The charging-current threshold is altered while the capacitive element is being charged to the predefined charging voltage. The controllable switch is driven again for coupling the charging current into the capacitive element if a predefined period of time after a previous activation of the controllable switch has elapsed, and/or in case the charging current drops below the predetermined charging-current threshold. A discharging process is carried out correspondingly.
Claims16
A method for charging a capacitive element to a predefined charging voltage with the aid of a charging current, comprising:
- driving a controllable switch to interrupt the charging current when the charging current exceeds a predetermined current threshold;
- driving the controllable switch to couple in the charging-current at least one of i) when a predefined period of a time after a previous activation of the controllable switch has elapsed, and ii) when the charging current drops below the predetermined charging-current threshold;
- and
- altering the charging-current threshold while the capacitive element is being charged to the predefined charging voltage, wherein the charging-current threshold is altered only when the charging current increases after a first activation of the controllable switch and has fallen below the charging-current threshold in response to a following second activation of the controllable switch.
A non-transitory storage medium storing a computer program, the computer program, when executed by a controller, causing the controller to perform a method for charging a capacitive element to a predefined charging voltage with the aid of charging current, comprising:
- driving a controllable switch to interrupt the charging current when the charging current exceeds a predetermined current threshold;
- driving the controllable switch to couple in the charging-current at least one of i) when a predefined period of a time after a previous activation of the controllable switch has elapsed, and ii) when the charging current drops below the predetermined charging-current threshold;
- and
- altering the charging-current threshold while the capacitive element is being charged to the predefined charging voltage, wherein the charging-current threshold is altered only when the charging current increases after a first activation of the controllable switch and has fallen below the charging-current threshold in response to a following second activation of the controllable switch.
A device for charging or discharging a capacitive element to a pre-defined charging voltage or discharging voltage with the aid of a coupled-in charging current or discharging current, the device included a control circuit adapted to perform the steps of:
- driving a controllable switch to interrupt the charging current when the charging current exceeds a predetermined current threshold;
- driving the controllable switch to couple in the charging-current at least one of i) when a predefined period of a time after a previous activation of the controllable switch has elapsed, and ii) when the charging current drops below the predetermined charging-current threshold;
- and
- altering the charging-current threshold while the capacitive element is being charged to the predefined charging voltage, wherein the charging-current threshold is altered only when the charging current increases after a first activation of the controllable switch and has fallen below the charging-current threshold in response to a following second activation of the controllable switch.
Dependencies are inferred from the claim text.