Patent ID: 7928720

Claim:
A measurement system for measuring power conversion efficiencies of a voltage regulator, the measurement system comprising: a resistor; a voltage meter connected with the resistor in parallel, the voltage regulator being connected to a power supply via the resistor and the voltage meter; an electronic load connected to the voltage regulator; and a measuring device connected between the voltage meter and the electronic load, the measuring device comprising a processor and a memory connected to the processor, the memory comprising a plurality of modules each of which stores one or more computerized instructions being executed by the processor, wherein the plurality of modules comprises: a measurement setting module to preset a maximum output current of the voltage regulator and a total measurement number input by users, set an initial sequence number of measurement, and calculate a target output current for each sequence number of measurement according to a target output current formula; a load adjustment module to read a current passing through the electronic load for the sequence number of measurement, adjust an impedance of the electronic load to make the current passing through the electronic load equal to a corresponding target output current of the voltage regulator for the sequence number of measurement; a calculation module to read a plurality of groups of currents passing through the electronic load and input voltages of the electronic load for the sequence number of measurement, calculate a plurality of output powers of the voltage regulator, each output power of the voltage regulator calculated by multiplying one of the input voltages with a corresponding current passing through the electronic load, read a plurality of groups of voltages of the voltage meter, calculate a plurality of input powers of the voltage regulator, each input power of the voltage regulator calculated according to an input power of the voltage regulator formula, and calculate that the power conversion efficiency at the sequence number of measurement equals an average of a sum of a ratio of each output power to each input power; and a determination module to determine whether the sequence number of measurement exceeds a measurement number, and set a new sequence number of measurement for a subsequent measurement when the sequence number of measurement does not exceed the measurement number.