Power supply for powering a load, method for powering the load

The power supply for powering a load, the power supply comprising:

• an input terminal configured to be connected to an external power supply having a mains voltage,
• an output terminal configured to be connected to the load,
• a power converter configured to convert a supply power, received from the external power supply, to a load power, the power converter having an isolation transformer having a primary circuit connected to the input terminal and a secondary circuit connected to the output terminal, the secondary circuit being electrically isolated from the primary circuit and magnetically coupled to the primary circuit,
• a measurement circuit configured to provide a signal representative of an internal current associated with the power converter, and
• a control unit configured to:
• determine one or more electrical characteristics on the primary circuit of the isolation transformer, and
• receive the signal from the measurement circuit,
• determine the load power supplied on the primary circuit of the isolation transformer, based on the determined one or more electrical characteristics and the internal current associated with the power converter, and
• determine a loss power representing the power loss from the external power supply to a mains side of the power converter, based on a loss model as a function of the determined one or more electrical characteristics and the internal current associated with the power converter, and
• determine the supply power, received from the external power supply, based on the determined load power and the determined loss power.

A method for powering a load, the method comprising the steps of:

• connecting an input terminal to an external power supply having a mains voltage,
• connecting an output terminal to the load,
• converting a supply power, received from the external power supply, by a power converter to a load power,
• determining a voltage and a current on a load side of the power converter,
• providing a signal representative of the mains voltage,
• receiving the signal to determine the mains voltage,
• determining the load power supplied on the load side of the power converter, based on the determined voltage and current on the load side of the power converter,
• determining a loss power representing the power loss from the external power supply to the load side of the power converter, based on a loss model as a function of the determined voltage and current on the load side of the power converter and the determined mains voltage, and
• determining the supply power, received from the external power supply, based on the determined load power and the determined loss power.

A method for powering a load, the method comprising the steps of:

• connecting an input terminal to an external power supply having a mains voltage,
• connecting an output terminal to the load,
• converting a supply power, received from the external power supply, by a power converter to a load power, the power converter having a primary circuit connected to the input terminal and a secondary circuit connected to the output terminal, the secondary circuit being electrically isolated from the primary circuit and magnetically coupled to the primary circuit,
• determining one or more electrical characteristics on the primary circuit,
• providing a signal representative of an internal current associated with the power converter,
• receiving the signal,
• determining the load power supplied on the primary circuit, based on the determined one or more electrical characteristics and the internal current associated with the power converter,
• determining a loss power representing the power loss from the external power supply to a mains side of the power converter, based on a loss model as a function of the determined one or more electrical characteristics and the internal current associated with the power converter, and
• determining the supply power, received from the external power supply, based on the determined load power and the determined loss power.