Control of a half-bridge
AssigneeRobert Bosch GmbH
InventorsMichael Forscht, Georg Schulze-Icking-Konert
Life of this patent
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Abstract
A half-bridge includes a first switching device for connecting a terminal to a first potential, and a second switching device for connecting the terminal to a second potential. A method according to the present invention for controlling the half-bridge includes the steps of outputting a closing signal for the first switching device while the second switching device is open, and of ascertaining a latency period between the start of the closing signal and a collapse of a voltage applied across the first switching device. Subsequently, a dead time that lies between an opening of the second switching device and a closing of the first switching device is minimized on the basis of the ascertained latency period.
Claims9
A method for controlling a half-bridge with a first switching device for connecting a terminal to a first potential and a second switching device for connecting the terminal to a second potential, the method comprising:
- outputting a closing signal for the first switching device while the second switching device is open;
- ascertaining a latency period between a start of the closing signal and a collapse of a voltage applied across the first switching device;
- and
- minimizing a dead time that lies between an opening of the second switching device and a closing of the first switching device based on the ascertained latency period,
- wherein a further latency period between an end of the closing signal and a rise in the voltage applied across the first switching device is ascertained and a further dead time, which lies between a closing of the second switching device and an opening of the first switching device is minimized based on the ascertained further latency period.
At least one non-transitory computer readable medium having a computer program, which is executable by a processor, comprising:
- a program code arrangement having program code for controlling a half-bridge with a first switching device for connecting a terminal to a first potential and a second switching device for connecting the terminal to a second potential, by performing the following:
- outputting a closing signal for the first switching device while the second switching device is open;
- ascertaining a latency period between a start of the closing signal and a collapse of a voltage applied across the first switching device;
- and
- minimizing a dead time that lies between an opening of the second switching device and a closing of the first switching device based on the ascertained latency period,
- wherein a further latency period between an end of the closing signal and a rise in the voltage applied across the first switching device is ascertained and a further dead time, which lies between a closing of the second switching device and an opening of the first switching device is minimized based on the ascertained further latency period.
A control device for controlling a half-bridge having a first switching device for connecting a terminal to a first potential and a second switching device for connecting the terminal to a second potential, comprising:
- a first actuating device for outputting a closing signal to the first switching device;
- a second actuating device for outputting an opening signal to the second switching device;
- a comparator for ascertaining that a voltage applied across the first switching device is collapsing;
- and
- a timing unit for ascertaining a latency period between a start of the closing signal and a collapse of the voltage, while the second switching device is open;
- wherein the first actuating device is set up to minimize a dead time that lies between an opening of the second switching device and a closing of the first switching device based on the ascertained latency period,
- wherein a further latency period between an end of the closing signal and a rise in the voltage applied across the first switching device is ascertained and a further dead time, which lies between a closing of the second switching device and an opening of the first switching device is minimized based on the ascertained further latency period.
Dependencies are inferred from the claim text.