Control device for DC converter, DC converter, and method for controlling a DC converter
AssigneeRobert Bosch GmbH
InventorGholamabas Esteghlal
Life of this patent
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Abstract
The invention relates to control of a DC converter having multiple parallel-connected DC converter modules. Here, a common variable for the voltage control is formed for the control of all the DC converter modules. In addition, a separate current controller is provided for each DC converter module. For each DC converter module, a control variable can be formed from the individually determined current control and the jointly determined voltage control.
Claims11
A control apparatus for a DC converter with a plurality of DC-DC converter modules (4-i), comprising:
- a feedforward control apparatus (1) configured to generate a first controlled variable (φ_1) based on a first setpoint value (U_des) for an output voltage of the DC converter and a value (U_in) for an input voltage of the DC converter;
- a voltage regulator (2) configured to generate a second controlled variable (φ_2) based on the first setpoint value (U_des) for the output voltage of the DC converter and a first ascertained value (U_cur) for the output voltage of the DC converter;
- a plurality of current regulators (3-i) each of the current regulators (3-i) being associated with a DC-DC converter module (4-i) and the current regulators (3-i) are each configured to generate a third controlled variable (φ_3_i) for the respectively associated DC-DC converter module (4-i) based on a second setpoint value (I_des_i) for a current in the respectively associated DC-DC converter module (4-i) and a second ascertained value (I_i) for a current in the respectively associated DC-DC converter module (4-i),
- wherein a combination of the first controlled variable (φ_1), the second controlled variable (φ_2) and the third controlled variable (φ_3_i) of the respectively associated DC-DC converter module (4-i) is provided at the respectively associated DC-DC converter module (4-i).
A method for regulating a DC converter comprising a plurality of DC-DC converter modules (4-i), the method comprising:
- producing (S1) a first controlled variable (φ_1) based on a first setpoint value (U_des) for an output voltage of the DC converter and a value (U_in) for an input voltage of the DC converter;
- producing (S2) a second controlled variable (φ_2) based on the first setpoint value (U_des) of the output voltage of the DC converter and a first ascertained value (U_cur) of the output voltage of the DC converter;
- producing (S3) a plurality of third controlled variables (φ_3_i), wherein each third controlled variable (φ_3_i) is associated with a DC-DC converter module (4-i) and the third controlled variable (φ_3_i) for the respectively associated DC-DC converter module (4-i) is produced on the basis of a second setpoint value (I_des_i) for a current in the respectively associated DC-DC converter module (4-i) and a second ascertained value (I_i) for a current in the respectively associated DC-DC converter module (4-i);
- actuating (S4) the DC-DC converter modules (4-i) using a combination of the first controlled variable (φ_1), the second controlled variable (φ_2) and the third controlled variable (φ_3_i) of the respectively associated DC-DC converter module (4-i).
Dependencies are inferred from the claim text.