Device and method for an intermittent load

Abstract

An approach is provided for minimizing capacitance requirements of a filter capacitor of a charging device for an intermittent load. A method for charging an intermittent load that is able to pulse on and off periodically without compromising the utility of the load. The method comprises setting timestamps relating to a waveform of an input Alternating Current (AC) voltage. The timestamps are synchronized to the AC voltage and comprise on times and off times that turn the intermittent load off and on. The method further comprises charging the intermittent load during the on times. Therefore, the capacitance of the filter capacitor used for the intermittent load can be significantly reduced since there will be no voltage drop when the intermittent load has been turned off.

Description

technical field [0001] The invention relates to a power management method, in particular to a method for charging an intermittent load, and an intermittent load charging device corresponding to an AC power supply. Background technique [0002] Many electrical devices are driven by alternating current (eg, commercial power). Generally speaking, a device driven by alternating current will have a filter and rectifier circuit including a rectifier and a filter capacitor. The rectifier converts the AC voltage into a pulsed DC voltage, and the filter capacitor not only needs to be able to withstand (charge) high voltage, but also needs to maintain (discharge) enough voltage to supply when the input voltage approaches zero volts. current required by the load. However, most of the above devices use electrolytic capacitors as filter capacitors, mainly because electrolytic capacitors have characteristics such as higher rated voltage and high capacitance value, as well as reasonable c...

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Problems solved by technology

[0004] However, electrolytic capacitors have the disadvantage of short service life, especially at high temperatures, such disadvantages will be more obvious. In fact, the main reason for the limited service life of many electronic devices is this electrolytic filter capacitor. The problem of service life, if the electrolytic filter capacitor can be replaced by a capacitor technology with a long service life (such as polyester film (Polyester Film), ceramic or MYLAR polyester film), then the electronic device can effectively extend its use Lifespan, but also helps reduce the burden on the earth because of the loss of many electronic products

[0005] However, existing capacitors with long service life usually have the disadvantage of not providing sufficient capacitance value or being too costly,

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