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US 12,015,342 B2Granted
DC-DC converter and method for operating a DC-DC converter
AssigneeRobert Bosch GmbH
InventorsChristoph Kienzler, Gholamabas Esteghlal
Life of this patent
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Abstract
The present invention relates to the control of a DC-DC converter, wherein the gradient of a controlled variable is limited for the control of the DC-DC converter. A maximum current change in the DC-DC converter can be limited by limiting the gradient of the controlled variable in order to optionally prevent dangerous operating states of the DC-DC converter.
Claims8
A DC-DC converter (1), comprising:
- a first control device (10), which is designed to determine a first controlled variable (R1) using a value for a present input voltage (U_in), a value for a present input current (I_in) and a setpoint value for an output voltage (U_des);
- a second control device (20), which is designed to determine a second controlled variable (R2) using the setpoint value for the output voltage (U_des) and the value for the present output voltage (U_out);
- a combination element (40), which is designed to combine the first controlled variable (R1) and the second controlled variable (R2) and to output said variables as a setpoint controlled variable (R3);
- a third control device (30), which is designed to limit a gradient of the setpoint controlled variable (R3) to a predetermined minimum value and/or a predetermined maximum value and to provide the limited setpoint controlled variable (R3) as an output controlled variable (R4);
- and
- at least one DC-DC converter module (50), which is designed to convert a DC input voltage (U_in) into a DC output voltage (U_out) using the output controlled variable (R4).
3 more elements
A method for operating a DC-DC converter (1), comprising the following steps:
- determining (S1) a first controlled variable (R1) using a value for a present input voltage (U_in), a value for a present input current (I_in) and a setpoint value for an output voltage (U_des);
- determining (S2) a second controlled variable (R2) using the setpoint value for the output voltage (U_des) and the value for the present output voltage (U_out);
- combining (S3) the first controlled variable (R1) and the second controlled variable (R2) to give a setpoint controlled variable (R3);
- limiting (S4) a gradient of the setpoint controlled variable (R3) to a predetermined minimum value and/or a predetermined maximum value and providing the limited setpoint controlled variable (R3) as an output controlled variable (R4);
- and
- driving (S5) a number at least one DC-DC converter modules (50) using the output controlled variable (R4).
3 more elements
Dependencies are inferred from the claim text.