Method and load calculator for providing temperature information for a high voltage generator of a medical imaging device

A load calculator for providing temperature information that relates to an inverter assembly of a high voltage generator for an X-ray tube of a medical imaging device, the inverter assembly having an inverter and a cooling body, and the load calculator comprising:

• a power loss data receiving unit configured to receive power loss data that relates to the inverter;
• a coefficient receiving unit configured to receive a set of thermodynamic coefficients that relates to a heating of the inverter, a conduction of heat from the inverter to the cooling body, and a transfer of heat from the cooling body to a cooling fluid, the heating of the inverter being caused by power loss;
• a cooling fluid temperature data receiving unit configured to receive cooling fluid temperature data that relates to the cooling fluid;
• a computing unit configured to
• calculate the temperature information based on the power loss data, the set of thermodynamic coefficients, and the cooling fluid temperature data, the calculation of the temperature information being based on
• a thermodynamic model of the cooling body, wherein the cooling body includes a first region and a second region, and wherein the set of thermodynamic coefficients relates to the conduction of heat from the inverter to the cooling body and the transfer of heat from the cooling body to the cooling fluid in that the set of thermodynamic coefficients relates to a conduction of heat from the inverter to the first region of the cooling body, a conduction of heat from the first region of the cooling body to the second region of the cooling body, and a transfer of heat from the second region of the cooling body to the cooling fluid,
• and
• calculate a parameter change based on the temperature information, the parameter change relating to at least one of a tube current, a tube voltage, an intermediate circuit direct current voltage, or a scan duration;
• a parameter changing unit configured to change the at least one of the tube current, the tube voltage, the intermediate circuit direct current voltage, or the scan duration based on a cooling pause of the medical imaging device being unable to prevent an overheating of the medical imaging device;
• and
• a providing unit configured to provide the temperature information and the parameter change.

A load calculator for providing temperature information that relates to an inverter assembly of a high voltage generator for an X-ray tube of a medical imaging device, the inverter assembly having an inverter and a cooling body, and the load calculator comprising:

• one or more processors;
• and
• a memory storing computer-executable instructions that, when executed by the one or more processors, cause the load calculator to
• receive power loss data that relates to the inverter,
• receive a set of thermodynamic coefficients that relates to a heating of the inverter, a conduction of heat from the inverter to the cooling body, and a transfer of heat from the cooling body to a cooling fluid, the heating of the inverter being caused by power loss,
• receive cooling fluid temperature data that relates to the cooling fluid,
• calculate the temperature information based on the power loss data, the set of thermodynamic coefficients, and the cooling fluid temperature data, the calculation of the temperature information being based on
• a thermodynamic model of the cooling body, wherein the cooling body includes a first region and a second region, and wherein the set of thermodynamic coefficients relates to the conduction of heat from the inverter to the cooling body and the transfer of heat from the cooling body to the cooling fluid in that the set of thermodynamic coefficients relates to a conduction of heat from the inverter to the first region of the cooling body, a conduction of heat from the first region of the cooling body to the second region of the cooling body, and a transfer of heat from the second region of the cooling body to the cooling fluid,
• calculate a parameter change based on the temperature information, the parameter change relating to at least one of a tube current, a tube voltage, an intermediate circuit direct current voltage, or a scan duration,
• change the at least one of the tube current, the tube voltage, the intermediate circuit direct current voltage, or the scan duration based on a cooling pause of the medical imaging device being unable to prevent an overheating of the medical imaging device, and
• provide the temperature information and the parameter change.