US 2014/0176109 A1Published application

Solar power supply device

AssigneeHon Hai Precision Industry Co., Ltd.

InventorsCHUANG-WEI TSENG, CHE-HSUN CHEN

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Abstract

A solar power supply device includes a solar panel converting solar energy to electrical power with a DC voltage, a voltage convertor connected to the solar panel, a control unit, and a PWM signal processing unit. The voltage convertor converts the DC voltage to a power voltage to power the electrical equipment. The control unit outputs a first and a second PWM signal, and adjusts duty cycles of the first PWM signal and/or the second PWM signal by determining whether the electrical power output by the solar panel can drive the electrical equipment. The PWM signal processing unit multiplies the first PWM signal and the second PWM signal to obtain a third PWM signal, and output the third PWM signal to the voltage convertor to control the voltage convertor to output the corresponding power voltage.

Claims9

Dependent claims

A solar power supply device comprising:

a solar panel configured to convert solar energy of sunlight into electrical power with a direct current (DC) voltage;
a power port configured to connect to electrical equipment;
a voltage convertor connected between the solar panel and the power port, and configured to convert the DC voltage to a power voltage and then output the power voltage to the electrical equipment via the power port;
a control unit configured to output a first pulse-width modulation (PWM) signal and a second PWM signal, and adjust duty cycles of the first PWM signal and/or the second PWM signal by determining whether the electrical power output from the solar panel can drive the electrical equipment;
and
a PWM signal processing unit connected between the control unit and the voltage convertor, and configured to multiply the first PWM signal and the second PWM signal output from the control unit to obtain a third PWM signal, and output the third PWM signal to the voltage convertor to control the voltage convertor to output the power voltage.

3 more elements

Dependencies are inferred from the claim text.