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US 2011/0031958 A1Published application
Power conversion efficiency measurement system and method
AssigneeHon Hai Precision Industry Co., Ltd.
InventorTING-CHUNG WANG
Life of this patent
Estimating the term…
Abstract
A system measures power conversion efficiency of a voltage regulator. A measurement setting module presets a maximum output current and a total measurement number, and calculates each target output current of the voltage regulator. A load adjustment module adjusts an impedance of the electronic load to equal current passing through the electronic load to the target output current of the voltage regulator. A calculation module calculates each output power and input power, and power conversion efficiencies for each sequence number of measurement.
Claims12
A measurement system for measuring power conversion efficiencies of a voltage regulator, the measurement system comprising:
- a resistor;
- a voltage meter connected with 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, calculate each target output current for each sequence number of measurement according to a target output current formula, and set an initial sequence number of measurement;
- 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 each output power of the voltage regulator by multiplying the input voltage and a corresponding current passing through the electronic load, read a plurality of groups of voltages of the voltage meter, calculate each input power of the voltage regulator according to a known resistance of the resistor and a corresponding output voltage of the power supply, 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.
7 more elements
A method for measuring power conversion efficiencies of a voltage regulator, the method comprising:
- presetting a maximum output current of the voltage regulator and a total measurement number, calculating a target output current for each sequence number of measurement according to a target output current formula, and setting an initial sequence number of measurement;
- adjusting an impedance of an electronic load to equal a current passing through the electronic load with the corresponding target output current of the voltage regulator at the sequence number of measurement;
- reading a plurality of groups of currents passing through the electronic load and input voltages of the electronic load at the sequence number of measurement, calculating each output power of the voltage regulator by multiplying the input voltage and the corresponding current passing through the electronic load, reading a plurality of groups of voltages of a voltage meter, and calculating each input power of the voltage regulator according to a known resistance of a resistor and an output voltage of a power supply;
- calculating a power conversion efficiency at the sequence number of measurement, wherein the power conversion efficiency equals an average of a sum of a ratio of each output power to a corresponding input power;
- and
- determining whether the sequence number of measurement exceeds a measurement number, and, if not, setting a new sequence number of measurement.
3 more elements
Dependencies are inferred from the claim text.