Converter Parameter Determination Method, And Control Method

A method for controlling a converter, wherein the converter comprises an AC/DC module and a DC/DC module, the method comprising:

• monitoring a DC output voltage and a DC output current of the DC/DC module of the converter;
• determining whether the DC output voltage or the DC output current is changed, if not, repeating the monitoring, and if so,
• querying whether corresponding empirical data is stored for the current DC output voltage and DC output current, wherein the empirical data comprises the DC output voltage, the DC output current, the corresponding AC/DC output voltage of the AC/DC module, and the corresponding switching frequency of the DC/DC module;
• if the corresponding empirical data is present in the Storage, controlling the converter using the AC/DC output voltage and switching frequency in the empirical data;
• if the corresponding empirical data is not present in the storage, determining an AC/DC output voltage and a switching frequency corresponding to the current DC output voltage and DC output current, and controlling the converter by using the determined AC/DC output voltage and switching frequency.

An apparatus for determining optimal operating parameters of a converter, wherein the converter comprises an AC/DC module and a DC/DC module, and an AC/DC output voltage of the AC/DC module has a predetermined range, the apparatus comprising:

• an initial voltage setting unit to set the AC/DC output voltage to a minimum value within the predetermined range;
• a power loss calculation unit to perform power loss calculation operations including:
• causing an output voltage of the DC/DC module to reach a predetermined DC output voltage by changing a switching frequency of the DC/DC module;
• calculating a power loss of the converter based on an input power of the AC/DC module and an output power of the DC/DC module;
• and
• recording current operating parameters, the operating parameters comprising an AC/DC output voltage, an output current and a switching frequency of the DC/DC module, and a power loss;
• a repetitive control unit to increase the AC/DC output voltage and to control the power loss calculation unit to perform the operation until the AC/DC output voltage reaches a maximum value within the predetermined range;
• and
• an optimal parameter determination unit to compare all recorded power losses, and to use the AC/DC output voltage and switching frequency corresponding to the power loss with a minimum value as the optimal operating parameters under the condition of the predetermined DC output voltage.

A control apparatus for a converter, wherein the converter comprises an AC/DC module and a DC/DC module, the control apparatus comprising:

• a monitoring unit to monitor a DC output voltage and a DC output current of the DC/DC module of the converter;
• a first determination unit to determine whether the DC output voltage or the DC output current is changed;
• a second determination unit to, in a case where the DC output voltage or DC output current is changed, query whether corresponding empirical data is stored for the current DC output voltage and DC output current, wherein the empirical data includes the DC output voltage, the DC output current, the corresponding AC/DC output voltage of the AC/DC module, and the corresponding switching frequency of the DC/DC module;
• a first control unit to, in a case where the corresponding empirical data is present in the storage, control the converter using the AC/DC output voltage and switching frequency in the empirical data;
• a second control unit to, in a case where the corresponding empirical data is not present in the storage, determine an AC/DC output voltage and a switching frequency corresponding to the current DC output voltage and DC output current, and control the converter using the determined AC/DC output voltage and switching frequency.