Systems and methods for high power factor charging

摘要

In one aspect, an apparatus for charging a device includes a charger and a controller. The charger includes a capacitance and has a charger input and a charger output. The charger input receives an AC input voltage waveform, and the charger output outputs an output voltage waveform and an output current waveform. The controller determines whether an amplitude of the output voltage waveform is within a voltage range. In response to determining that the amplitude of the output voltage waveform is within the voltage range, the controller directs an amplitude of the output current waveform to be substantially proportional to an amplitude of the AC input voltage waveform. In response to determining that the amplitude of the output voltage waveform is not within the voltage range, the controller increases the capacitance of the charger to adjust the amplitude of the output voltage waveform to be within the voltage range.

主权项

1. A method for charging a device with a charger, the method comprising:
determining, by a controller of the charger, whether an amplitude of an output voltage waveform at an output of the charger is within a voltage range, in response to the controller determining that the amplitude of the output voltage waveform is within the voltage range, directing, by the controller, an amplitude of an output current waveform at the output to be substantially proportional to an amplitude of an AC input voltage waveform at an input of the charger, and in response to the controller determining that the amplitude of the output voltage waveform is not within the voltage range, increasing, by the controller, a capacitance of the charger to adjust the amplitude of the output voltage waveform to be within the voltage range.